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Document and Entity Information Document $ in Millions	12 Months Ended
Document and Entity Information Document $ in Millions	Dec. 31, 2011 USD ($) shares
Entity Information [Line Items]
Entity Registrant Name	WESCO INTERNATIONAL INC.
Entity Central Index Key	0000929008
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Dec. 31, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding \| shares	43,461,030
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float \| $	$ 2,325.1

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Current Assets:
Cash and cash equivalents	$ 63,869	$ 53,577
Trade accounts receivable, net of allowance for doubtful accounts of $21,590 and $18,562 in 2011 and 2010, respectively	939,422	792,681
Other accounts receivable	43,442	37,223
Inventories, net	626,967	588,848
Current deferred income taxes	28,217	3,046
Income taxes receivable	12,206	18,146
Prepaid expenses and other current assets	23,297	20,165
Total current assets	1,737,420	1,513,686
Property, buildings and equipment, net	133,550	118,045
Intangible assets, net	156,874	160,307
Goodwill	1,008,127	985,714
Deferred income taxes	18,090	35,887
Other assets	24,391	13,135
Total assets	3,078,452	2,826,774
Current Liabilities:
Accounts payable	642,777	537,505
Accrued payroll and benefit costs	76,915	66,931
Current portion of long-term debt	6,411	3,988
Bank overdrafts	47,489	27,590
Current deferred income taxes	0	4,593
Other current liabilities	72,254	67,626
Total current liabilities	845,846	708,233
Long-term debt, net of discount of $175,908 and $178,427 in 2011 and 2010, respectively	642,922	725,893
Deferred income taxes	223,005	210,876
Other noncurrent liabilities	20,769	33,178
Total liabilities	1,732,542	1,678,180
Commitments and contingencies
Stockholders' Equity:
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding	0	0
Additional capital	1,036,867	1,018,683
Retained earnings	891,789	697,676
Treasury stock, at cost; 17,936,923 and 17,905,740 shares in 2011 and 2010, respectively	(593,329)	(591,007)
Accumulated other comprehensive income	10,057	22,633
Total WESCO International stockholders' equity	1,345,998	1,148,594
Noncontrolling interest	(88)	0
Total stockholders' equity	1,345,910	1,148,594
Total liabilities and stockholders' equity	3,078,452	2,826,774
Common Stock [Member]
Stockholders' Equity:
Common Stock	571	566
Common Class B
Stockholders' Equity:
Common Stock	$ 43	$ 43

CONSOLIDATED BALANCE SHEETS PARENTHETICAL (Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Allowance for doubtful accounts	$ 21,590	$ 18,562
Debt discount	$ 175,908	$ 178,427
Common stock, par value	$ 0.01
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	20,000,000	20,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Treasury stock, shares	17,936,923	17,905,740
Common Stock [Member]
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	210,000,000	210,000,000
Common stock, shares issued	57,021,523	56,576,250
Common stock, shares outstanding	43,424,031	43,009,941
Common Class B
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	20,000,000	20,000,000
Common stock, shares issued	4,339,431	4,339,431
Common stock, shares outstanding	0	0

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	12 Months Ended
CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net sales	$ 6,125,718	$ 5,063,862	$ 4,623,954
Cost of goods sold	4,889,149	4,065,425	3,724,061
Selling, general and administrative expense	871,983	763,583	693,896
Depreciation and amortization	31,607	23,935	26,045
Income from operations	332,979	210,919	179,952
Interest expense, net	53,603	57,563	53,754
Gain on debt exchange	0	0	(5,962)
Other income	0	(4,285)	(4,991)
Income before income taxes	279,376	157,641	137,151
Provision for income taxes	83,136	42,164	32,063
Net income	196,240	115,477	105,088
Net loss attributable to noncontrolling interest	(11)	0	0
Net Income attributable to WESCO International, Inc.	$ 196,251	$ 115,477	$ 105,088
Earnings per share :
Basic	$ 4.54	$ 2.72	$ 2.49
Diluted	$ 3.96	$ 2.50	$ 2.46

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY PARENTHETICAL (Parentheticals) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Stockholders' Equity Parenthetical [Abstract]
Tax benefit from exercise of stock options	$ 5,365	$ 3,082	$ 895
Tax impact of issuance of convertible debt instruments	0	0	68,641
Tax impact of exchange of debt	$ 0	$ 0	$ 9,837

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Comprehensive Income [Member]	Common Stock [Member]	Common Class B	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Convertible Senior Debentures Due In 2025 [Member] Common Stock [Member]	Convertible Senior Debentures Due In 2025 [Member] Additional Paid-in Capital [Member]	Convertible Senior Debentures Due in 2029 [Member] Common Stock [Member]	Convertible Senior Debentures Due in 2029 [Member] Additional Paid-in Capital [Member]
Stockholders' equity at period start at Dec. 31, 2008			$ 557	$ 43	$ 886,019	$ 477,111	$ (590,288)	$ 0	$ (18,338)
Shares at period start at Dec. 31, 2008			55,788,620	4,339,431			(17,888,089)
Exercise of stock options, value			$ 3		2,270		$ (65)
Exercise of stock options, amount	253,253		179,204				(2,370)
Stock-based compensation expense					13,324
Issuance of convertible debt instruments, net of tax impact of $68,641					106,462
Exchange of debt, net of tax impact of $9,837					(15,220)
Net income	$ 105,088	$ 105,088				105,088
Translation adjustment		29,323							29,323
Comprehensive income		134,411
Stockholders' equity at period end at Dec. 31, 2009			$ 560	$ 43	992,855	582,199	$ (590,353)	0	10,985
Shares at period end at Dec. 31, 2009			55,967,824	4,339,431			(17,890,459)
Exercise of stock options, value			$ 3		4,852		$ (654)
Exercise of stock options, amount	335,155		268,213				(15,281)
Stock-based compensation expense					15,751
Conversion of debentures, value										$ 3	$ 5,225
Conversion of debentures, shares										340,213
Net income	$ 115,477	115,477				115,477
Translation adjustment		11,648							11,648
Comprehensive income		127,125
Stockholders' equity at period end at Dec. 31, 2010	$ 1,148,594		$ 566	$ 43	1,018,683	697,676	$ (591,007)	0	22,633
Shares at period end at Dec. 31, 2010			56,576,250	4,339,431			(17,905,740)
Exercise of stock options, value			$ 6		5,783		$ (7,838)
Exercise of stock options, amount	543,154		531,121				(146,614)
Stock-based compensation expense					15,407
Conversion of debentures, value												$ 0	$ (5)
Conversion of debentures, shares												589
Issuance of treasury stock, value					(582)		$ 957
Issuance of treasury stock, shares							28,994
Exercise of restricted stock units and retirement of common stock, value			$ (1)		(2,419)	(2,138)	$ 4,559
Exercise of restricted stock units and retirement of common stock, shares			(86,437)				86,437
Acquisition of noncontrolling interest								(77)
Net income	$ 196,240	196,240				196,251		(11)
Translation adjustment		(12,576)							(12,576)
Comprehensive income		$ 183,664
Stockholders' equity at period end at Dec. 31, 2011	$ 1,345,998		$ 571	$ 43	$ 1,036,867	$ 891,789	$ (593,329)	$ (88)	$ 10,057
Shares at period end at Dec. 31, 2011			57,021,523	4,339,431			(17,936,923)

(Parentheticals) - USD ($) $ in Thousands	12 Months Ended
(Parentheticals) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Statement of Cash Flows Parenthetical [Abstract]
Equity income, distributions	$ 0	$ 1,864	$ 5,658

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating Activities:
Net income	$ 196,240	$ 115,477	$ 105,088
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	31,607	23,935	26,045
Stock-based compensation expense	15,407	15,752	13,324
Amortization of debt issuance costs	4,435	2,584	3,494
Amortization of debt discount	2,499	4,262	11,806
Gain on debt exchange	0	0	(5,962)
(Gain) loss on sale of property, buildings and equipment	304	(224)	123
Asset impairment charge	0	3,793	0
Equity income, net of distributions in 2010 and 2009 of $1,864 and $5,658, respectively	0	(2,420)	668
Excess tax benefit from stock-based compensation	(5,408)	(3,217)	(1,250)
Interest related to uncertain tax positions	1,901	4,980	969
Deferred income taxes	14,373	20,982	(7,959)
Changes in assets and liabilities
Trade and other receivables, net	(143,491)	(118,478)	179,662
Inventories, net	(33,769)	(33,956)	107,848
Prepaid expenses and other current assets	11,268	12,641	(12,492)
Accounts payable	101,677	53,902	(114,289)
Accrued payroll and benefit costs	9,988	34,422	(19,418)
Other current and noncurrent liabilities	(39,498)	(7,152)	4,007
Net cash provided by operating activities	167,533	127,283	291,664
Investing Activities:
Capital expenditures	(33,347)	(15,132)	(12,970)
Acquisition payments, net of cash acquired	(48,093)	(265,397)	(262)
Proceeds from sale of subsidiary	0	40,000	0
Equity distribution	0	4,054	2,420
Collection of note receivable	0	15,000	0
Proceeds from sale of assets	97	932	120
Net cash used in investing activities	(81,343)	(220,543)	(10,692)
Financing Activities:
Proceeds from issuance of long-term debt	648,557	1,454,479	403,700
Repayments of long-term debt	(730,897)	(1,419,526)	(657,385)
Debt issuance costs	(4,703)	(2,553)	(13,749)
Proceeds from the exercise of stock options	419	1,771	1,377
Excess tax benefit from stock-based compensation	5,408	3,217	1,250
Repurchase of common stock	(7,840)	(655)	(64)
Increase (decrease) in bank overdrafts	19,899	(4,601)	1,823
Payments on capital lease obligations	(1,751)	(1,497)	(1,897)
Net cash provided (used) by financing activities	(70,908)	30,635	(264,945)
Effect of exchange rate on cash and cash equivalents	(4,990)	3,873	9,964
Net change in cash and cash equivalents	10,292	(58,752)	25,991
Cash and cash equivalents at the beginning of period	53,577	112,329	86,338
Cash and cash equivalents at the end of period	63,869	53,577	112,329
Supplemental disclosures:
Cash paid for interest	43,446	46,899	32,113
Cash paid for taxes	27,359	11,044	45,185
Non-cash investing and financing activities:
Property, buildings and equipment acquired through capital leases	$ 1,112	$ 301	$ 781

ORGANIZATION	12 Months Ended
ORGANIZATION	Dec. 31, 2011
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION	ORGANIZATION WESCO International, Inc. and its subsidiaries (collectively, “WESCO”), headquartered in Pittsburgh, Pennsylvania, is a full-line distributor of electrical, industrial and communications maintenance, repair and operating (“MRO”) and original equipment manufactures (“OEM”) products, construction materials, and advanced supply chain management and logistics services used primarily in the industrial, construction, utility and commercial, institutional and government markets. We serve over 65,000 active customers globally, through approximately 400 full service branches and eight distribution centers located primarily in the United States, Canada and Mexico, with operations in 11 additional countries.

ACCOUNTING POLICIES

12 Months Ended

Dec. 31, 2011

Accounting Policies [Abstract]

ACCOUNTING POLICIES

Revenue Recognition

Revenues are recognized for product sales when title, ownership and risk of loss pass to the customer or for services when the service is rendered. In the case of stock sales and special orders, a sale occurs at the time of shipment from WESCO's distribution point, as the terms of WESCO’s sales are predominantly FOB shipping point. In cases where WESCO processes customer orders but ships directly from its suppliers, revenue is recognized once product is shipped and title has passed. In all cases, revenue is recognized once the sales price to the customer is fixed or is determinable and WESCO has reasonable assurance as to the collectability.

In certain customer arrangements, WESCO provides services such as inventory management. WESCO may perform some or all of the following services for customers: determine inventory stocking levels; establish inventory reorder points; launch purchase orders; receive material; put away material; and pick material for order fulfillment. WESCO recognizes revenue for services rendered during the period based upon a previously negotiated fee arrangement. WESCO also sells inventory to these customers and recognizes revenue at the time title and risk of loss transfers to the customer. The amount of revenue attributed to these services totaled $10.8 million, $11.1 million, and $10.0 million in 2011, 2010 and 2009, respectively.

Selling, General and Administrative Expenses

WESCO includes warehousing, purchasing, branch operations, information services, and marketing and selling expenses in this category, as well as other types of general and administrative costs.

Supplier Volume Rebates

WESCO receives volume rebates from certain suppliers based on contractual arrangements with such suppliers. An asset, included within other accounts receivable on the balance sheet, represents the estimated amounts due to WESCO under the rebate provisions of such contracts. The corresponding rebate income is recorded as a reduction of cost of goods sold. The appropriate level of such income is derived from the level of actual purchases made by WESCO from suppliers. Receivables under the supplier rebate program were $38.5 million at December 31, 2011 and $31.0 million at December 31, 2010. Supplier volume rebate rates have historically ranged between approximately 0.8% and 1.2% of sales depending on market conditions. In 2011, the rebate rate was 1.2%.

Shipping and Handling Costs and Fees

WESCO records the costs and fees associated with transporting its products to customers as a component of selling, general and administrative expenses. These costs totaled $50.9 million, $42.4 million and $49.2 million in 2011, 2010 and 2009, respectively.

Cash Equivalents

Cash equivalents are defined as highly liquid investments with original maturities of 90 days or less when purchased.

Asset Securitization

WESCO maintains control of the receivables transferred pursuant to its accounts receivable securitization program (the “Receivables Facility”); therefore the transfers do not qualify for “sale” treatment. As a result, the transferred receivables remain on the balance sheet, and WESCO recognizes the related secured borrowing. The expenses associated with the Receivables Facility are reported as interest expense in the statement of income.

Allowance for Doubtful Accounts

WESCO maintains allowances for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. WESCO has a systematic procedure using estimates based on historical data and reasonable assumptions of collectability made at the local branch level and on a consolidated corporate basis to calculate the allowance for doubtful accounts. If the financial condition of WESCO’s customers were to deteriorate, resulting in an impairment of their ability to make payments, additional allowances may be required. The allowance for doubtful accounts was $21.6 million at December 31, 2011 and $18.6 million at December 31, 2010. The total amount recorded as selling, general and administrative expense related to bad debts was $6.6 million, $6.4 million and $6.1 million for 2011, 2010 and 2009, respectively.

Inventories

Inventories primarily consist of merchandise purchased for resale and are stated at the lower of cost or market. Cost is determined principally under the average cost method. WESCO makes provisions for obsolete or slow-moving inventories as necessary to reflect reduction in inventory value. WESCO writes down its inventory to its net realizable value based on internal factors derived from historical analysis of actual losses. Looking back, WESCO identifies items at risk of becoming obsolete, defined as being in excess of 36 months supply relative to demand or movement. WESCO then analyzes in a detailed manner the ultimate disposition of the previously identified excess inventory items, such as sold, returned to supplier, or scrapped. This item by item analysis allows WESCO to develop an estimate which represents the historical likelihood that an item identified as being in excess supply ultimately becomes obsolete. On a current basis, WESCO applies the estimate to inventory items currently in excess of 36 months supply, and reduces its inventory carrying value by the derived amount. Reserves for excess and obsolete inventories were $14.6 million and $20.5 million at December 31, 2011 and 2010, respectively. The total expense related to excess and obsolete inventories, included in cost of goods sold, was $5.5 million, $7.5 million and $7.8 million for 2011, 2010 and 2009, respectively. WESCO absorbs into the cost of inventory the general and administrative expenses related to inventory such as purchasing, receiving and storage and at December 31, 2011 and 2010, $47.6 million and $43.8 million, respectively, of these costs were included in ending inventory.

Other Assets

WESCO amortizes deferred financing fees over the term of the various debt instruments. Deferred financing fees in the amount of $4.7 million were incurred during the year ending December 31, 2011. As of December 31, 2011 and 2010, the amount of other assets related to unamortized deferred financing fees was $12.9 million and $12.6 million, respectively.

Property, Buildings and Equipment

Property, buildings and equipment are recorded at cost. Depreciation expense is determined using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized over either their respective lease terms or their estimated lives, whichever is shorter. Estimated useful lives range from five to forty years for leasehold improvements and buildings and three to ten years for furniture, fixtures and equipment.

Capitalized computer software costs are amortized using the straight-line method over the estimated useful life, typically three to five years, and are reported at the lower of unamortized cost or net realizable value.

Expenditures for new facilities and improvements that extend the useful life of an asset are capitalized. Ordinary repairs and maintenance are expensed as incurred. When property is retired or otherwise disposed of, the cost and the related accumulated depreciation are removed from the accounts and any related gains or losses are recorded and reported as selling, general and administrative expenses.

WESCO assesses its long-lived assets for impairment by periodically reviewing operating performance and respective utilization of real and tangible assets. Upon closure of any branch, asset usefulness and remaining life are evaluated and any charges taken as appropriate. Of WESCO’s $133.6 million net book value of property, plant and equipment as of December 31, 2011, $72.9 million consists of land, buildings and leasehold improvements and are geographically dispersed among WESCO’s 400 branches and eight distribution centers, mitigating the risk of impairment. Approximately $27.8 million of assets consist of computer equipment and capitalized software and are evaluated for use and serviceability relative to carrying value. The remaining fixed assets, mainly of furniture and fixtures, warehousing equipment and transportation equipment, are similarly evaluated for serviceability and use.

Goodwill and Indefinite Life Intangible Assets

Goodwill and indefinite life intangible assets are tested for impairment annually during the fourth quarter using information available at the end of September, or more frequently if events or circumstances occur indicating that their carrying value may not be recoverable. The evaluation of impairment involves comparing the current fair value of goodwill and indefinite life intangible assets to the recorded value. WESCO estimates the fair value of goodwill using a combination of discounted cash flow analyses and market multiples. Assumptions used for these fair value techniques are based on a combination of historical results, current forecasts, market data and recent economic events. WESCO evaluates the recoverability of indefinite life intangible assets using a discounted cash flow analysis based on projected financial information. The determination of fair value involves significant judgment and management applies its best judgment when assessing the reasonableness of financial projections. At December 31, 2011 and 2010, goodwill and trademarks totaled $1,055.0 million and $1,031.4 million, respectively. No impairment losses were identified in 2011 as a result of this review. However, two trademarks valued at $18.1 million are sensitive to a further decline in financial performance. WESCO is taking actions to improve its future financial performance; however, WESCO cannot predict whether or not there will be certain events that could adversely affect the reported value of these trademarks.

Definite Lived Intangible Assets

Intangible assets are amortized over 4 to 19 years. A portion of intangible assets related to customer relationships are amortized using an accelerated method whereas all other intangible assets subject to amortization use a straight-line method which reflects the pattern in which the economic benefits of the respective assets are consumed or otherwise used. Intangible assets are tested for impairment if events or circumstances occur indicating that the respective asset might be impaired.

Insurance Programs

WESCO uses commercial insurance for auto, workers’ compensation, casualty and health claims as a risk-reduction strategy to minimize catastrophic losses. The Company’s strategy involves large deductibles where WESCO must pay all costs up to the deductible amount. WESCO estimates the reserve based on historical incident rates and costs. The assumptions included in developing this accrual include the period of time from incurrence of a claim until the claim is paid by the insurance provider. The total liability related to the insurance programs was $9.7 million at December 31, 2011 and $11.4 million at December 31, 2010.

Income Taxes

Income taxes are accounted for under the liability method in accordance with income tax accounting guidance. Deferred tax assets and liabilities are determined based on differences between the financial reporting and tax basis of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. Valuation allowances, if any, are provided when it is more likely than not that a portion or all of a deferred tax asset may not be realized.

WESCO accounts for uncertainty in income taxes using a recognition threshold and measurement attribute prescribed by income tax accounting guidance. WESCO frequently reviews tax issues and positions taken on tax returns to determine the need and amount of contingency reserves necessary to cover any probable audit adjustments. WESCO recognizes interest related to unrecognized tax benefits as part of interest expense. Penalties are recognized as part of income tax expense.

Convertible Debentures

WESCO separately accounts for the liability and equity components of its convertible debentures in a manner that reflects its non-convertible debt borrowing rate. WESCO estimates its non-convertible debt borrowing rate through a combination of discussions with its financial institutions and review of relevant market data. The discounts to the convertible note balances are amortized to interest expense, using the effective interest method, over the implicit life of the Debentures.

Foreign Currency

The local currency is the functional currency for the majority of WESCO’s operations outside the United States. Assets and liabilities of these operations are translated to U.S. dollars at the exchange rate in effect at the end of each period. Income statement accounts are translated at the average exchange rate prevailing during the period. Translation adjustments arising from the use of differing exchange rates from period to period are included as a component of other comprehensive income within stockholders’ equity. Gains and losses from foreign currency transactions are included in net income for the period.

Stock-Based Compensation

WESCO’s stock-based employee compensation plans are comprised of stock options, stock-settled stock appreciation rights and restricted stock units. Compensation cost for all stock-based awards is measured at fair value on the date of grant, and compensation cost is recognized, net of estimated forfeitures, over the service period for awards expected to vest. The fair value of stock options and stock-settled appreciation rights is determined using the Black-Scholes valuation model. Expected volatilities are based on historical volatility of WESCO’s common stock. The expected life of stock options and stock-settled appreciation rights is estimated using historical data pertaining to option exercises and employee terminations. The risk-free rate is based on the U.S. Treasury yields in effect at the time of grant. The forfeiture assumption is based on WESCO’s historical employee behavior that is reviewed on an annual basis. The fair value of restricted stock units is determined by the grant-date closing price of WESCO’s common stock. No dividends are assumed for stock based awards.

WESCO granted the following stock-settled stock appreciation rights and restricted stock units at the following weighted average assumptions:



	2011	2010	2009
Stock-settled appreciation rights granted	399,260	708,949	815,231
Restricted stock units	53,852	153,318	245,997
Risk free interest rate	2.3%	1.8%	2.3%
Expected life (in years)	5.0	5.0	4.5
Expected volatility	49%	49%	51%

The weighted average fair value per stock-settled appreciation right granted was $26.46, $14.71 and $11.15 for the years ended December 31, 2011, 2010 and 2009, respectively. The weighted average fair value per restricted stock unit granted was $60.05, $33.05 and $25.37 for the years ended December 31, 2011, 2010 and 2009, respectively. WESCO recognized $15.4 million, $15.8 million and $13.3 million of non-cash stock-based compensation expense, which is included in selling, general and administrative expenses, in 2011, 2010 and 2009, respectively.

Treasury Stock

Common stock purchased for treasury is recorded at cost. At the date of subsequent reissue, the treasury stock account is reduced by the cost of such stock, with cost determined on a weighted average basis.

Fair Value of Financial Instruments

The Company’s financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable and other accrued liabilities, and outstanding indebtedness. The estimated fair value of the Company’s outstanding indebtedness described in Note 7 at December 31, 2011 and 2010 was $1,178.9 million and $1,269.7 million, respectively. The aggregate fair value of the senior notes and debentures was approximately $850.9 million and $860.2 million at December 31, 2011 and 2010, respectively. The fair values of these fixed rate facilities are estimated based upon market price quotes. The fair values of the mortgage facility, the Receivables Facility and our revolving credit facility ("the Revolving Credit Facility"), approximated carrying values. The fair values for these facilities are based upon market price quotes and market comparisons available for instruments with similar terms and maturities. For all remaining WESCO financial instruments, carrying values are considered to approximate fair value due to their short maturities.

Environmental Expenditures

WESCO has facilities and operations that distribute certain products that must comply with environmental regulations and laws. Expenditures for current operations are expensed or capitalized, as appropriate. Expenditures relating to existing conditions caused by past operations, and that do not contribute to future revenue, are expensed. Liabilities are recorded when remedial efforts are probable and the costs can be reasonably estimated.

Recent Accounting Pronouncements

In June 2011, the Financial Accounting Standards Board (the "FASB") issued new disclosure guidance related to the presentation of the statement of comprehensive income. This guidance provides an entity the option to present the total of comprehensive income, the components of net income and the components of other comprehensive income either in a single continuous statement of comprehensive income or in two separate but consecutive statements; the current option to report other comprehensive income and its components in the statement of changes in stockholders' equity was eliminated. This accounting standard is effective for periods beginning on or after December 15, 2011. Other than the change in presentation, this accounting standard will not have an impact on WESCO's financial position, results of operations or cash flows.

In September 2011, the FASB issued guidance to amend and simplify the rules related to testing goodwill for impairment. The revised guidance allows an entity to make an initial qualitative evaluation, based on the entity's events and circumstances, to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. The results of this qualitative assessment determine whether it is necessary to perform the currently required two-step impairment test. The new guidance is effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011. Early adoption is permitted. Adoption of this guidance is not expected to have a material impact on WESCO's financial position, results of operations or cash flows.

In September 2011, the FASB issued an accounting update that requires additional qualitative and quantitative disclosures by employers that participate in multi-employer pension plans. The amendments are effective for annual periods for the fiscal years ending after December 15, 2011, with early adoption permitted. Adoption of this guidance did not have a material impact on WESCO's financial position, results of operations or cash flows.

Other pronouncements issued by the FASB or other authoritative accounting standards groups with future effective dates are either not applicable or are not expected to be significant to WESCO’s financial position, results of operations or cash flows.

GOODWILL AND INTANGIBLE ASSETS

12 Months Ended

Dec. 31, 2011

Goodwill and Intangible Assets Disclosure [Abstract]

GOODWILL AND INTANGIBLE ASSETS

Goodwill

The following table sets forth the changes in the carrying amount of goodwill:



	Year Ended December 31
	2011			2010
	(In thousands)
Beginning balance January 1	$	985,714		$	863,410
Translation adjustments and payments to goodwill for prior acquisitions	(4,734		)	2,467
Additions to goodwill for acquisitions	27,147			119,837
Ending balance December 31	$	1,008,127		$	985,714

WESCO has never recorded an impairment loss related to goodwill or intangible assets.

Intangible Assets

The components of intangible assets are as follows:



	December 31, 2011								December 31, 2010
	Life	Gross Carrying Amount⁽¹⁾		Accumulated Amortization⁽¹⁾			Net Carrying Amount		Gross Carrying Amount⁽¹⁾		Accumulated Amortization⁽¹⁾			Net Carrying Amount
	(In thousands)
Intangible Assets:
Trademarks	Indefinite	$	46,852	$	—		$	46,852	$	45,687	$	—		$	45,687
Non-compete agreements	5-7	1,252		(1,038		)	214		1,252		(895		)	357
Customer relationships	4-19	70,670		(32,527		)	38,143		65,967		(25,933		)	40,034
Distribution agreements	10-19	35,291		(6,897		)	28,394		31,084		(4,950		)	26,134
Patents	10	48,310		(5,039		)	43,271		48,310		(215		)	48,095
		$	202,375	$	(45,501	)	$	156,874	$	192,300	$	(31,993	)	$	160,307

_________________________


⁽¹⁾	Excludes the original cost and accumulated amortization of fully-amortized intangibles.

Amortization expense related to intangible assets totaled $13.4 million, $7.5 million and $7.3 million for the years ended December 31, 2011, 2010 and 2009, respectively.

The following table sets forth the estimated amortization expense for intangibles for the next five years (in thousands):



	Estimated
	Amortization
For the year ended December 31,	Expense
2012	$	12,002
2013	11,831
2014	11,262
2015	11,262
2016	11,262

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

CONCENTRATIONS OF CREDIT RISK AND SIGNIFICANT SUPPLIERS	12 Months Ended
CONCENTRATIONS OF CREDIT RISK AND SIGNIFICANT SUPPLIERS	Dec. 31, 2011
Risks and Uncertainties [Abstract]
CONCENTRATIONS OF CREDIT RISK AND SIGNIFICANT SUPPLIERS	CONCENTRATIONS OF CREDIT RISK AND SIGNIFICANT SUPPLIERS WESCO distributes its products and services and extends credit to a large number of customers in the industrial, construction, utility, commercial, institutional, and governmental markets. WESCO’s largest supplier accounted for approximately 10% of WESCO's purchases in 2011 and 12% of purchases in 2010 and 2009, and therefore, WESCO could potentially incur risk due to supplier concentration. Based upon WESCO’s broad customer base, the Company has concluded that it has no material credit risk as a result of customer concentration.

- Definition

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 107
-Paragraph 15A
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 94-6
-Paragraph 21, 22, 24
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=6947722&loc=d3e13537-108611

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+ Details

ACQUISITIONS

12 Months Ended

Dec. 31, 2011

Business Combinations [Abstract]

ACQUISITIONS

The following table sets forth the consideration paid for acquisitions:



Year Ended December 31	2011			2010
(In thousands)
Details of acquisitions:
Fair value of assets acquired	$	54,663		$	297,849
Fair value of liabilities assumed	(6,570		)	(31,162		)
Deferred acquisition payments	—			185
Cash paid for acquisitions	$	48,093		$	266,872
Supplemental cash flow disclosure related to acquisitions:
Cash paid for acquisitions	$	48,093		$	266,872
Less: cash acquired	—			(1,475		)
Cash paid for acquisitions, net of cash acquired	$	48,093		$	265,397

2011 Acquisitions of RECO, LLC and Brews Supply, Ltd.

On March 14, 2011, WESCO Distribution, Inc. ("WESCO Distribution") completed its acquisition of RECO, LLC ("RECO"), a Siemens automation, controls, and electrical distributor located in the midwest and southeastern regions of the United States with approximately $25 million in annual sales. WESCO funded the purchase price paid at closing with cash and borrowings under the Receivables Facility. The purchase price was allocated to the respective assets and liabilities based upon their estimated fair values as of the acquisition date. The excess of the purchase price over the fair value of the net assets acquired has been allocated to goodwill valued at $6.0 million. Management believes the majority of goodwill will be deductible for tax purposes.

On October 3, 2011, WESCO Distribution through its wholly-owned Canadian subsidiary, completed its acquisition of Brews Supply, Ltd. ("Brews"), a full line electrical distributor of industrial, utility, and commercial products located in western Canada with approximately $50 million in annual sales. WESCO funded the purchase price paid at closing with cash and borrowings under the Receivables Facility. The purchase price was allocated to the respective assets and liabilities based upon their estimated fair values as of the acquisition date. The excess of the purchase price over the fair value of the net assets acquired, including intangible assets, has been allocated to goodwill. The fair value of intangible assets was estimated by management and the allocation resulted in goodwill and intangible assets of $19.8 million and $10.2 million, respectively. Management believes the majority of goodwill will be deductible for tax purposes. The intangible assets include customer relationships of $4.8 million amortized over 10 years, supplier relationships of $4.2 million amortized over 10 years and trademarks of $1.2 million. Trademarks have an indefinite life and are not being amortized. No residual value is estimated for the intangible assets. With the acquisition of Brews, WESCO obtained a 49% ownership in a joint venture. This entity has been consolidated. The noncontrolling interest incurred a loss of less than $0.1 million in 2011.

2010 Acquisitions of TVC Communications, L.L.C. and Potelcom Supply, Inc.

On December 16, 2010, WESCO Distribution completed its acquisition of TVC Communications, L.L.C. (“TVC Communications”), an international distributor in the Western Hemisphere of infrastructure products to the cable television and telecommunication industries. TVC Communications offers products necessary to build out a broadband network, ranging from the industry’s widest selection of premier branded components, to a variety of proprietary and private label products. TVC Communications also offers a full suite of value-added services, including design, engineering, installation, repair and maintenance.

WESCO paid at closing a cash purchase price of approximately $251.0 million, net of $1.5 million of cash acquired, of which $20.0 million was held in escrow to address post-closing working capital adjustments. WESCO funded the purchase price paid at closing with cash and borrowings under the Receivables Facility. The purchase price was allocated to the respective assets and liabilities based upon their estimated fair values as of the acquisition date. The excess of the purchase price over the fair value of the net assets acquired, including intangible assets, has been allocated to goodwill. The fair value of intangible assets was estimated by management and the allocation resulted in intangible assets of $86.4 million and goodwill of $109.2 million. Management believes the majority of goodwill will be deductible for tax purposes. The intangible assets include technology patents of $48.3 million amortized over 10 years, customer relationships of $20.6 million amortized over 10 years, supplier relationships of $9.7 million amortized over 15 years and trademarks of $7.8 million. Trademarks have an indefinite life and are not being amortized. No residual value is estimated for the intangible assets.

The allocation of assets acquired and liabilities assumed for the TVC Communications acquisition is summarized below:



	TVC Communications, LLC
(In thousands)
Assets Acquired
Cash and cash equivalents	$	1,475
Trade accounts receivable	38,744
Other accounts receivable	978
Inventories	41,313
Prepaid expenses and other current assets	1,377
Property, buildings and equipment	2,268
Intangible assets	86,442
Goodwill	109,183
Other noncurrent assets	158
Total assets acquired	281,938

Liabilities Assumed
Accounts payable	24,249
Accrued payroll and benefit costs	1,183
Other current liabilities	4,019
Total liabilities assumed	29,451

Fair value of net assets acquired, including intangible assets	$	252,487

TVC Communications contributed $6.9 million in net sales and had no impact on net income of WESCO's 2010 results. Unaudited pro forma results of operations (in thousands, except per share data) for the twelve months ended December 31, 2010 and 2009 are included below as if the acquisition occurred on the first day of the respective periods. The summary of the unaudited pro forma results of operations is not necessarily indicative of what WESCO's results of operations would have been had TVC Communications been acquired at the beginning of 2009, nor does it purport to represent results of operations for any future periods. Seasonality of sales is not a significant factor to these pro forma combined results of operations.



Year Ended December 31	2010		2009
(In thousands, except per share data)
Net Sales	$	5,315,929	$	4,907,441
Net Income	132,455		121,306
Earnings per common share:
Basic	$	3.12	$	2.87
Diluted	$	2.87	$	2.84

On June 30, 2010, WESCO Distribution completed its acquisition of Potelcom Supply, Inc., a single branch operation with annual sales of approximately $25 million serving the utility, industrial, and governmental markets in Alaska. WESCO funded the purchase price at closing with cash and borrowings under the Receivables Facility. The purchase price was allocated to the respective assets and liabilities based upon their estimated fair value as of the acquisition date. The excess of the purchase price over the fair value of the net assets acquired has been allocated to goodwill valued at $10.7 million.

- Definition

The entire disclosure for a business combination (or series of individually immaterial business combinations) completed during the period, including background, timing, and recognized assets and liabilities. The disclosure may include leverage buyout transactions (as applicable).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 88-16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51, 52
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Appendix F
-Paragraph F4
-Subparagraph e

Reference 4: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 67-73
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ Details

PROPERTY, BUILDINGS AND EQUIPMENT

12 Months Ended

Dec. 31, 2011

Property, Plant and Equipment [Abstract]

PROPERTY, BUILDINGS AND EQUIPMENT

The following table sets forth the components of property, buildings and equipment:



	December 31,
	2011		2010
	(In thousands)
Buildings and leasehold improvements	96,527		92,862
Furniture, fixtures and equipment	152,164		140,427
Software costs	44,909		77,335
	293,600		310,624
Accumulated depreciation and amortization	(190,385	)	(215,768	)
	103,215		94,856
Land	21,097		21,169
Construction in progress	9,238		2,020
	133,550		118,045

Depreciation expense was $12.5 million, $11.7 million and $13.7 million, and capitalized software amortization was $5.7 million, $4.7 million and $5.0 million, in 2011, 2010 and 2009, respectively. The unamortized software cost was $19.7 million and $18.0 million as of December 31, 2011 and 2010, respectively. Furniture, fixtures and equipment include capitalized leases of $9.6 million and $9.2 million and related accumulated amortization of $4.7 million and $4.0 million as of December 31, 2011 and 2010, respectively.

- Definition

The entire disclosure for long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. This disclosure may include property plant and equipment accounting policies and methodology, a schedule of property, plant and equipment gross, additions, deletions, transfers and other changes, depreciation, depletion and amortization expense, net, accumulated depreciation, depletion and amortization expense and useful lives, income statement disclosures, assets held for sale and public utility disclosures.

+ References + Details

DEBT

12 Months Ended

Dec. 31, 2011

Debt Disclosure [Abstract]

DEBT

The following table sets forth WESCO’s outstanding indebtedness:



	As of December 31,
	2011			2010
	(In thousands)
Mortgage financing facility	$	37,564		$	39,239
Accounts receivable securitization facility	250,000			370,000
Revolving credit facility	36,792			—
7.50% Senior Subordinated Notes due 2017	150,000			150,000
1.75% Convertible Senior Debentures due 2026, less debt discount of $0 and $7 in 2011 and 2010, respectively	56			214
6.0% Convertible Senior Debentures due 2029, less debt discount of $175,908 and $178,420 in 2011 and 2010, respectively	169,054			166,580
Acquisition related notes	85			204
Capital leases	2,521			3,167
Other	3,261			477
Total debt	649,333			729,881
Less current portion	(6,411		)	(3,988		)
Total long-term debt	$	642,922		$	725,893

Mortgage Financing Facility

In 2003, WESCO finalized a mortgage financing facility of $51 million, of which $37.6 million was outstanding as of December 31, 2011. Total borrowings under the mortgage financing facility are subject to a 22-year amortization schedule, with a balloon payment due at the end of the 10-year term. The interest rate on borrowings under this facility is fixed at 6.5%.

Accounts Receivable Securitization Facility

During 2011, WESCO Distribution entered into an amendment of its existing Receivables Facility, pursuant to the terms and conditions of the Fourth Amendment to Third Amended and Restated Receivables Purchase Agreement, dated as of April 13, 2009 (the “Amendment”), by and among WESCO Receivables Corp., WESCO Distribution, the Purchasers and Purchaser Agents party thereto and PNC Bank, National Association, as Administrator. The Amendment added an accordion feature, allowing WESCO Distribution to request increases to the purchase commitments of up to $100 million in the aggregate. The Amendment also lowered the interest rate spread from 1.75% to 1.10%, the commitment fee from 0.75% to 0.55%, and extended the term of the Receivables Facility to August 2014. As of December 31, 2011, the purchase commitment was $450 million.

Under the Receivables Facility, WESCO sells, on a continuous basis, an undivided interest in all domestic accounts receivable to WESCO Receivables Corp., a wholly owned special purpose entity (the “SPE”). The SPE sells, without recourse, a senior undivided interest in the receivables to third-party conduits and financial institutions for cash while maintaining a subordinated undivided interest in the receivables, in the form of overcollateralization. WESCO has agreed to continue servicing the sold receivables for the third-party conduits and financial institutions at market rates; accordingly, no servicing asset or liability has been recorded.

As of December 31, 2011 and 2010, accounts receivable eligible for securitization totaled approximately $613.9 million and $537.0 million, respectively. The consolidated balance sheets as of December 31, 2011 and 2010 include $250.0 million and $370.0 million, respectively, of account receivable balances legally sold to third parties, as well as borrowings for equal amounts. At December 31, 2011, the interest rate on borrowings under this facility was approximately 1.64%.

Revolving Credit Facility

During 2011, WESCO Distribution entered into a new Revolving Credit Facility, which has an aggregate borrowing capacity of $400 million and includes a letter of credit sub-facility of up to $80 million. The Revolving Credit Facility consists of two separate sub-facilities: (i) a U.S. sub-facility with a borrowing limit at any given time of up to $400 million less the amount of outstanding borrowings under the Canadian sub-facility and (ii) a Canadian sub-facility with a borrowing limit of up to $175 million. The facility also contains an accordion feature, allowing WESCO Distribution to request increases to the borrowing commitments under the facility of up to $100 million in the aggregate. The facility matures in August 2016 and is collateralized by the inventory and certain other assets of WESCO Distribution and certain of its domestic subsidiaries and the inventory, accounts receivable, and certain other assets of WESCO Distribution Canada, L.P. WESCO Distribution’s obligations under the Revolving Credit Facility have been guaranteed by WESCO International and by certain of WESCO International’s subsidiaries.

Availability under the facility is limited to the amount of eligible U.S. and Canadian inventory and Canadian receivables applied against certain advance rates. Depending upon the amount of excess availability under the facility, interest will be calculated at LIBOR plus a margin that ranges between 1.50% and 2.00% or at the Alternative Rate (prime rate) plus a margin that ranges between 0.50% and 1.00%. The interest rate margin is reduced by 0.25% if WESCO's leverage ratio, as calculated under the Revolving Credit Facility, falls below a ratio of 2.5 to 1.0. At December 31, 2011, the interest rate on borrowings under this facility was approximately 3.0%.

As long as pro forma combined availability for the preceding 60-day period, up to and including the transaction date, under the facility and WESCO Distribution's accounts receivable securitization facility is greater than $125 million, WESCO is permitted, subject to certain specified conditions, to make acquisitions and repurchase WESCO International's outstanding capital stock and WESCO outstanding indebtedness.

During 2011, WESCO borrowed $435.7 million in the aggregate under the Revolving Credit Facility and made repayments in the aggregate amount of $398.9 million. During 2010, aggregate borrowings and repayments were $636.0 million and $832.5 million, respectively. At December 31, 2011, WESCO had a balance outstanding of $36.8 million under the facility. WESCO had $299.3 million available under the facility at December 31, 2011, after giving effect to outstanding letters of credit, as compared to approximately $276.7 million at December 31, 2010.

7.50% Senior Subordinated Notes due 2017

At December 31, 2011, $150 million in aggregate principal amount of the 7.50% Senior Subordinated Notes due 2017 (the “2017 Notes”) was outstanding. The 2017 Notes were issued by WESCO Distribution under an indenture dated as of September 27, 2005 with The Bank of New York, as successor to J.P. Morgan Trust Company, National Association, as trustee, and are unconditionally guaranteed on an unsecured basis by WESCO International. The 2017 Notes accrue interest at the rate of 7.50% per annum and are payable in cash semi-annually in arrears on each April 15 and October 15.

Between October 15, 2011 and October 14, 2012, WESCO Distribution may redeem all or a part of the 2017 Notes at a redemption price equal to 102.50% of the principal amount. Between October 15, 2012 and October 14, 2013, WESCO Distribution may redeem all or a part of the 2017 Notes at a redemption price equal to 101.25% of the principal amount. On and after October 15, 2013, WESCO Distribution may redeem all or a part of the 2017 Notes at a redemption price equal to 100% of the principal amount.

If WESCO Distribution undergoes a change of control prior to maturity, holders of 2017 Notes will have the right, at their option, to require WESCO Distribution to repurchase for cash some or all of their 2017 Notes at a repurchase price equal to 101% of the principal amount of the 2017 Notes being repurchased, plus accrued and unpaid interest to, but not including, the repurchase date.

2.625% Convertible Senior Debentures due 2025

Proceeds of $150 million were received in connection with the issuance of the 2.625% Convertible Senior Debentures due 2025 (the "2025 Debentures”) by WESCO International in September 2005. On August 27, 2009, WESCO International completed an exchange offer pursuant to which it issued $345.0 million in aggregate principal amount of 6.0% Convertible Senior Debentures due 2029 (the “2029 Debentures”) in exchange for approximately $299.7 million and $57.7 million in aggregate principal amounts of its outstanding 1.75% Convertible Senior Debentures due 2026 (the “2026 Debentures”) and 2025 Debentures, respectively (see the discussion below under “6.0% Convertible Senior Debentures due 2029” for additional information). On November 19, 2010, WESCO International announced that it would redeem all of its outstanding 2025 Debentures. In connection with the redemption, holders of $89.8 million aggregate principal amount of 2025 Debentures converted on December 23, 2010 their 2025 debentures pursuant to the terms of the 2025 Debentures. In settlement of those conversions, WESCO paid an aggregate of approximately $89.8 million in cash, including cash in lieu of fractional shares, and issued 340,213 shares of its common stock. WESCO redeemed the remaining $2.5 million aggregate principal amount of outstanding 2025 Debentures at a redemption price equal to 100% of the principal amount plus accrued and unpaid interest. Following the redemption on December 23, 2010, there were no 2025 Debentures outstanding.

On January 1, 2009, WESCO retrospectively applied the provisions of guidance concerning convertible debt instruments to the 2025 Debentures. WESCO utilized an interest rate of 6% to reflect the non-convertible market rate of its offering upon issuance. WESCO amortized the debt discount over a five year period starting on the date of issuance. There was no non-cash interest expense recorded for the year ended December 31, 2011. Non-cash interest expense of $2.1 million and $4.0 million was recorded for the years ended 2010 and 2009, respectively.

1.75% Convertible Senior Debentures due 2026

Proceeds of $300 million were received in connection with the issuance of the 2026 Debentures by WESCO International in November 2006. On August 27, 2009, WESCO International completed an exchange offer pursuant to which it issued $345.0 million in aggregate principal amount of 2029 Debentures in exchange for approximately $299.7 million and $57.7 million in aggregate principal amounts of its outstanding 2026 Debentures and 2025 Debentures, respectively (see the 6.0% Convertible Senior Debentures due 2029 discussion below for additional information). On November 30, 2011, WESCO International announced that it would redeem all of its 2026 Debentures on January 3, 2012. WESCO International redeemed the remaining $0.1 million aggregate principal amount of outstanding 2026 Debentures at a redemption price equal to 100% of the principal amount plus accrued and unpaid interest. Following the redemption on January 3, 2012, there were no 2026 Debentures outstanding.

On January 1, 2009, WESCO retrospectively applied the provisions of guidance concerning convertible debt instruments to the 2026 Debentures. WESCO utilized an interest rate of 6% to reflect the non-convertible market rate of its offering upon issuance. WESCO amortized the debt discount over a five year period starting on the date of issuance. Non-cash interest expense of less than $0.1 million, less than $0.1 million and $7.1 million was recorded for the years ended December 31, 2011, 2010 and 2009, respectively.

6.0% Convertible Senior Debentures due 2029

On August 27, 2009, WESCO International completed an exchange offer pursuant to which it issued $345.0 million in aggregate principal amount of 2029 Debentures in exchange for approximately $299.7 million and $57.7 million in aggregate principal amounts of its outstanding 2026 Debentures and 2025 Debentures, respectively. As a result of the debt exchange, WESCO recorded a gain of $6.0 million, which included the write-off of debt issuance costs. The 2029 Debentures were issued pursuant to an Indenture dated August 27, 2009 (the “Indenture”), with The Bank of New York Mellon, as trustee, and are unconditionally guaranteed on an unsecured senior subordinate basis by WESCO Distribution.

WESCO utilized an interest rate of 13.875% to reflect the non-convertible debt borrowing rate of its offering upon issuance, which was determined based on discussions with its financial institutions and a review of relevant market data, and resulted in a $181.2 million discount to the 2029 Debenture balance and a net increase in additional capital of $106.5 million. In addition, the financing costs related to the issuance of the 2029 Debentures were allocated between the debt and equity components. WESCO is amortizing the debt discount and financing costs over the life of the instrument. Non-cash interest expense of $2.5 million and $2.1 million was recorded for the years ended December 31, 2011 and 2010, respectively. The debt discount amortization will approximate $2.8 million in 2012, $3.1 million in 2013, $3.6 million in 2014, $4.1 million in 2015, and $4.6 million in 2016.

While the 2029 Debentures accrue interest at an effective interest rate of 13.875% (as described above), the coupon interest rate of 6.0% per annum is payable in cash semi-annually in arrears on each March 15 and September 15, commencing March 15, 2010. Beginning with the six-month period commencing September 15, 2016, WESCO will also pay contingent interest in cash during any six-month period in which the trading price of the 2029 Debentures for each of the five trading days ending on the second trading day immediately preceding the first day of the applicable six-month interest period equals or exceeds 120% of the principal amount of the 2029 Debentures. During any interest period when contingent interest shall be payable, the contingent interest payable per $1,000 principal amount of 2029 Debentures will equal 0.25% of the average trading price of $1,000 principal amount of the 2029 Debentures during the five trading days immediately preceding the first day of the applicable six-month interest period. In accordance with guidance related to derivatives and hedging, the contingent interest feature of the 2029 Debentures is an embedded derivative that is not considered clearly and closely related to the host contract. The contingent interest component had no significant value at issuance or December 31, 2011.

The 2029 Debentures are convertible into cash, and in certain circumstances, shares of WESCO International’s common stock, $0.01 par value, at any time on or after September 15, 2028, or prior to September 15, 2028 in certain circumstances. The 2029 Debentures will be convertible based on an initial conversion rate of 34.6433 shares of common stock per $1,000 principal amount of the 2029 Debentures (equivalent to an initial conversion price of approximately $28.87 per share). The conversion rate and conversion price may be adjusted under certain circumstances.

At any time on or after September 15, 2016, the Company may redeem all or a part of the 2029 Debentures plus accrued and unpaid interest (including contingent interest and additional interest, if any) to, but not including, the redemption date. If WESCO International undergoes certain fundamental changes, as defined in the Indenture, prior to maturity, holders of the 2029 Debentures will have the right, at their option, to require WESCO International to repurchase for cash some or all of their 2029 Debentures at a repurchase price equal to 100% of the principal amount of the 2029 Debentures being repurchased, plus accrued and unpaid interest (including contingent interest and additional interest, if any) to, but not including, the repurchase date.

The following table sets forth the components of WESCO’s outstanding convertible debenture indebtedness:



	December 31, 2011							December 31, 2010
	Principal Balance		Discount			Net Carrying Amount		Principal Balance		Discount			Net Carrying Amount
						(In thousands)
Convertible Debentures:
2026	$	56	$	—		$	56	$	221	$	(7	)	$	214
2029	344,962		(175,908		)	169,054		345,000		(178,420		)	166,580
	$	345,018	$	(175,908	)	$	169,110	$	345,221	$	(178,427	)	$	166,794

Covenant Compliance

WESCO was in compliance with all relevant covenants contained in its debt agreements as of December 31, 2011.

The following table sets forth the aggregate principal repayment requirements for all indebtedness for the next five years and thereafter, as of December 31, 2011:



(In thousands)
2012	$	6,411
2013	36,594
2014	250,328
2015	133
2016	36,813
Thereafter	494,962
Total payments on debt	825,241
Debt discount on convertible debentures	(175,908		)
Total long-term debt	$	649,333

WESCO’s credit agreements contain various restrictive covenants that, among other things, impose limitations on (i) dividend payments or certain other restricted payments or investments; (ii) the incurrence of additional indebtedness and guarantees or issuance of additional stock; (iii) creation of liens; (iv) mergers, consolidation or sales of substantially all of WESCO’s assets; (v) certain transactions among affiliates; (vi) payments by certain subsidiaries to WESCO; and (vii) capital expenditures. In addition, the revolving credit agreement requires WESCO to meet certain fixed charge coverage tests depending on availability.

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

+ References + Details

CAPITAL STOCK	12 Months Ended
CAPITAL STOCK	Dec. 31, 2011
Stockholders' Equity Note [Abstract]
CAPITAL STOCK	CAPITAL STOCK Preferred Stock There are 20 million shares of preferred stock authorized at a par value of $.01 per share. The Board of Directors has the authority, without further action by the stockholders, to issue all authorized preferred shares in one or more series and to fix the number of shares, designations, voting powers, preferences, optional and other special rights and the restrictions or qualifications thereof. The rights, preferences, privileges and powers of each series of preferred stock may differ with respect to dividend rates, liquidation values, voting rights, conversion rights, redemption provisions and other matters. Common Stock There are 210 million shares of common stock and 20 million shares of Class B common stock authorized at a par value of $.01 per share. The Class B common stock is identical to the common stock, except for voting and conversion rights. The holders of Class B common stock have no voting rights. With certain exceptions, Class B common stock may be converted, at the option of the holder, into the same number of shares of common stock. Under the terms of the Revolving Credit Facility, WESCO International is restricted from declaring or paying dividends and as such, at December 31, 2011 and 2010, no dividends had been declared, and therefore no retained earnings were reserved for dividend payments. Additional Capital WESCO separately accounts for the liability and equity components of its Debentures in a manner that reflects its non-convertible debt borrowing rate. As of December 31, 2011 and 2010, the net equity included in additional capital related to the Debentures totaled $106.4 million and $106.5 million, respectively.

- Definition

The entire disclosure for shareholders' equity, comprised of portions attributable to the parent entity and noncontrolling interest, if any, including other comprehensive income (as applicable). Including, but not limited to: (1) balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings; (2) accumulated balance for each classification of other comprehensive income and total amount of comprehensive income; (3) amount and nature of changes in separate accounts, including the number of shares authorized and outstanding, number of shares issued upon exercise and conversion, and for other comprehensive income, the adjustments for reclassifications to net income; (4) rights and privileges of each class of stock authorized; (5) basis of treasury stock, if other than cost, and amounts paid and accounting treatment for treasury stock purchased significantly in excess of market; (6) dividends paid or payable per share and in the aggregate for each class of stock for each period presented; (7) dividend restrictions and accumulated preferred dividends in arrears (in aggregate and per share amount); (8) retained earnings appropriations or restrictions, such as dividend restrictions; (9) impact of change in accounting principle, initial adoption of new accounting principle and correction of an error in previously issued financial statements; (10) shares held in trust for Employee Stock Ownership Plan (ESOP); (11) deferred compensation related to issuance of capital stock; (12) note received for issuance of stock; (13) unamortized discount on shares; (14) description, terms, and number of warrants or rights outstanding; (15) shares under subscription and subscription receivables, effective date of new retained earnings after quasi-reorganization and deficit eliminated by quasi-reorganization and, for a period of at least ten years after the effective date, the point in time from which the new retained dates; and (16) retroactive effective of subsequent change in capital structure.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 12
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 3

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 4
-Section 08
-Paragraph d

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
-Chapter 1
-Section B
-Paragraph 7, 11A
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 129
-Paragraph 2, 3, 4, 5, 6, 7, 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Article 4

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29, 30, 31
-Article 5

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section E

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 4
-Section C

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187085-122770

Reference 12: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

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Reference 15: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 505
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-Publisher FASB
-Name Accounting Standards Codification
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Reference 17: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-Subparagraph (SX 210.4-08.(d),(e))
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-Name Accounting Standards Codification
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Reference 21: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Preferred Stock
-URI http://asc.fasb.org/extlink&oid=6521494

Reference 22: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6959260&loc=d3e187143-122770

+ Details

EQUITY INVESTMENT	12 Months Ended
EQUITY INVESTMENT	Dec. 31, 2011
Equity Method Investments and Joint Ventures [Abstract]
EQUITY INVESTMENT	EQUITY INVESTMENT During the first quarter of 2008, WESCO and Deutsch Engineered Connecting Devices, Inc. (“Deutsch”) completed a transaction with respect to WESCO’s LADD operations, which resulted in a joint venture in which Deutsch owned a 60% interest and WESCO owned a 40% interest. WESCO accounted for its investment in the joint venture using the equity method of accounting. Accordingly, earnings from the joint venture were recorded as other income in the consolidated statement of income. Deutsch was entitled, but not obliged, to acquire the remaining 40% after January 1, 2010. Deutsch paid to WESCO aggregate consideration of approximately $75.0 million, consisting of $60.0 million in cash plus a $15.0 million promissory note for its 60% interest in the joint venture. On January 15, 2010, WESCO received $1.8 million in accrued interest related to the promissory note for the period from January 2, 2008 to January 2, 2010. In addition, Deutsch and WESCO entered into an amended promissory note agreement. The amendment extended the maturity date for the payment of principal and interest to the earlier of (a) the closing date of Deutsch’s option to acquire the remaining 40% joint venture interest or (b) the maturity date of Deutsch’s credit facility or mezzanine financing facility. Interest accrued at a rate of 8.5% compounded annually. Management believed this rate was commensurate with a market rate of interest; therefore, no reserve or allowance was recorded against the promissory note. On April 30, 2010, Deutsch notified WESCO it would exercise its option to purchase the remaining 40% of the LADD joint venture. The option price for Deutsch to acquire the remaining 40% of the joint venture was determined based upon a multiple of trailing earnings, with a minimum purchase price of $40.0 million and maximum purchase price of $50.0 million. The investment in the LADD joint venture at March 31, 2010 was $43.4 million, and the estimated option exercise price was $40.0 million. As a result, WESCO recorded a pre-tax impairment loss of $3.4 million to selling, general and administrative expenses during the first quarter of 2010. On June 7, 2010, WESCO completed the sale of its 40% interest in the LADD joint venture and recorded an additional impairment charge of $0.4 million to selling, general and administrative expenses. WESCO received $40.0 million for its 40% interest plus $15.0 million for the outstanding promissory note and $0.5 million for accrued interest.

- Definition

The entire disclosure for equity investment, or group of investments, for which combined disclosure is appropriate, including: (a) the name of each investee and percentage of ownership of common stock, (b) accounting policies for investments in common stock, (c) difference between the amount at which the investment is carried and the amount of underlying equity in net assets and the accounting treatment of the difference, (d) the total fair value of each identified investment for which a market value is available, (e) summarized information as to assets, liabilities, and results of operations of the investees (for investments in unconsolidated subsidiaries, common stock of joint ventures, or other investments using the equity method), and (f) material effects of possible conversions, exercises, or contingent issuances of the investee. Other disclosures include (a) the names of any investee in which the investor owns 20 percent or more of the voting stock and investment is not accounted for using the equity method, and the reasons why not, and (b) the names of any investee in which the investor owns less than 20 percent of the voting stock and the investment is accounted for using the equity method, and the reasons why it is.

+ References + Details

INCOME TAXES

12 Months Ended

Dec. 31, 2011

Income Tax Disclosure [Abstract]

INCOME TAXES

The following table sets forth the components of the provision for income taxes:



	Year Ended December 31
	2011			2010			2009
				(In thousands)
Current taxes:
Federal⁽¹⁾	$	60,415		$	11,363		$	30,136
State	5,705			2,018			2,355
Foreign	2,643		7,801	7,801			7,531
Total current	68,763			21,182			40,022
Deferred taxes:
Federal	9,692			21,069			5,351
State	2,187			1,112			1,841
Foreign	2,494			(1,199		)	(15,151		)
Total deferred	14,373			20,982			(7,959		)
	$	83,136		$	42,164		$	32,063

_________________________


⁽¹⁾	Tax benefits related to stock options and other equity instruments recorded directly to additional paid in capital totaled $5.6 million, $8.2 million and $59.7 million in 2011, 2010 and 2009, respectively.

The following table sets forth the components of income before income taxes by jurisdiction:



	Year Ended December 31
	2011		2010			2009
			(In thousands)
United States	$	260,859	$	166,108		$	171,508
Foreign	18,517		(8,467		)	(34,357		)
	$	279,376	$	157,641		$	137,151

The following table sets forth the reconciliation between the federal statutory income tax rate and the effective rate:



	Year Ended December 31
	2011		2010		2009
Federal statutory rate	35.0	%	35.0	%	35.0	%
State taxes, net of federal tax benefit	2.1		1.5		2.5
Nondeductible expenses	0.7		1.3		1.3
Domestic tax benefit from foreign operations	—		(0.3	)	(0.4	)
Foreign tax rate differences	(6.3	)	(8.0	)	(13.7	)
Federal tax credits	(0.1	)	(0.1	)	(0.3	)
Domestic production activity deduction	(0.5	)	(0.5	)	(0.4	)
Adjustment related to uncertain tax positions	(0.7	)	(4.2	)	0.4
Revaluation of deferred tax items	0.4		1.9		(0.6	)
Other	(0.8	)	0.1		(0.4	)
	29.8	%	26.7	%	23.4	%

As of December 31, 2011, WESCO had approximately $246.8 million of undistributed earnings related to its foreign subsidiaries. Management believes that these earnings will be indefinitely reinvested in foreign jurisdiction; accordingly, WESCO has not provided for U.S. federal income taxes related to these earnings.

The following table sets forth deferred tax assets and liabilities:



	December 31
	2011				2010
			(In thousands)
	Assets		Liabilities		Assets		Liabilities
Accounts receivable	$	4,015	$	—	$	3,586	$	—
Inventory	—		6,515		—		7,163
Depreciation	—		6,064		—		15,754
Amortization of intangible assets	—		162,675		—		143,371
Convertible debt interest	—		93,736		—		84,551
Employee benefits	30,454		—		30,474		—
Tax loss carryforwards	24,232		—		32,692		—
Other	37,529		3,938		11,268		3,722
Total deferred taxes	$	96,230	$	272,928	$	78,020	$	254,561

As of December 31, 2011 and 2010, WESCO had state tax benefits derived from net operating loss carryforwards of approximately $6.3 million ($4.1 million, net of federal income tax) and $6.9 million ($4.5 million, net of federal income tax), respectively. In addition, WESCO had tax benefits from net operating losses resulting from the recapitalization of its Canadian operations of $20.2 million and $27.1 million, respectively. The amounts will begin expiring in 2012 and 2027, respectively. Utilization of WESCO’s state net operating loss carryforwards is subject to annual limitations imposed by state statute. Such annual limitations could result in the expiration of the net operating loss and tax credit carryforwards before utilization. Management anticipates utilizing the net operating losses prior to the expiration of statutes of limitations; accordingly, WESCO has not recorded a valuation allowance.

WESCO analyzes its filing positions for all open tax years in all jurisdictions. The Company is currently under examination in several tax jurisdictions, both within the United States and outside the United States, and remains subject to examination until the statute of limitations expires for the respective tax jurisdictions. In 2011, the Company settled its Internal Revenue Service examination for the years 2000 to 2006, for which an income tax receivable was recorded, and its Canadian Competent Authority examination for the years 1998 to 2003, for which the Company was fully reserved. The following summary sets forth the tax years that remain open in the Company’s major tax jurisdictions:



United States — Federal		2000 and forward *
United States — States		2006 and forward
Canada		1998 and forward *

* Open by waiver of statute only.

The following table sets forth the reconciliation of gross unrecognized tax benefits:



	December 31,
	2011				2010			2009
	(In thousands)
Beginning balance January 1	$	3,394			$	8,085		$	7,451
Additions based on tax positions related to the current year	265				1,439			319
Additions for tax positions of prior years⁽¹⁾	20,064				4,668			927
Reductions for tax positions of prior years	(2,161		)		(8,818		)	—
Settlements	(512		)		(1,368		)	(336		)
Lapse in statute of limitations	(172		)		(612		)	(276		)
Ending balance December 31	$	20,878		—	$	3,394		$	8,085

_________________________

⁽¹⁾ Additions for tax positions of prior years primarily relate to transfer pricing issues between the United States and

Canada which are under review by the Canadian Competent Authority. A corresponding deferred tax asset in the amount of $23.1 million excluding interest has been recorded for the position in the United States.

The total amount of unrecognized tax benefits were $20.9 million, $3.4 million and $8.1 million as of December 31, 2011, 2010 and 2009, respectively. If these tax benefits were recognized in the consolidated financial statements, the portion of these amounts that would reduce the Company’s tax provision would be $19.7 million, $1.9 million, and $7.1 million respectively. This amount in 2011 would be offset by the corresponding deferred tax asset discussed above.

During the next twelve months, it is reasonably possible that the amount of unrecognized tax benefits will decrease by as much as $17.3 million (all of which will be offset by the reversal of a deferred tax asset) due to certain issues being settled by the resolution of federal, state and/or foreign tax examinations and/or the expiration of statutes of limitations. Management does not expect this decrease to have an impact on the effective tax rate.

WESCO records interest related to uncertain tax positions as a part of interest expense in the consolidated statement of income. Any penalties are recognized as part of income tax expense. Penalties recorded to income tax expense were immaterial in amount for 2011, 2010 and 2009, respectively. As of December 31, 2011 and 2010, WESCO had an accrued liability of $11.4 million and $9.5 million, respectively, for interest related to uncertain tax positions.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 08
-Paragraph h
-Article 4

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 136, 172
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 109
-Paragraph 43, 44, 45, 46, 47, 48, 49
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h))
-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

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-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319

+ Details

EARNINGS PER SHARE EARNINGS PER SHARE

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

EARNINGS PER SHARE

Basic earnings per share are computed by dividing net income by the weighted average common shares outstanding during the periods. Diluted earnings per share are computed by dividing net income by the weighted average common shares and common share equivalents outstanding during the periods. The dilutive effect of common share equivalents is considered in the diluted earnings per share computation using the treasury stock method, which includes consideration of stock-based compensation.

The following table sets forth the details of basic and diluted earnings per share:



	Year Ended December 31
	2011		2010		2009
			(In thousands)
Net income	$	196,251	$	115,477	$	105,088
Weighted average common shares outstanding used in computing basic earnings per share	43,220		42,499		42,282
Common shares issuable upon exercise of dilutive stock options	1,179		840		390
Common shares issuable from contingently convertible debentures (see below for basis of calculation)	5,224		2,774		—
Weighted average common shares outstanding and common share equivalents used in computing diluted earnings per share	49,623		46,113		42,672
Earnings per share attributable to WESCO International, Inc.
Basic	$	4.54	$	2.72	$	2.49
Diluted	$	3.96	$	2.50	$	2.46

As of December 31, 2011, 2010 and 2009, the computation of diluted earnings per share attributable to WESCO International, Inc. excluded stock-settled stock appreciation rights of approximately 1.2 million, 2.4 million and 3.6 million at weighted average exercise prices of $62.48 per share, $46.73 per share and $39.65 per share, respectively. These amounts were excluded because their effect would have been antidilutive.

Because of WESCO’s obligation to settle the par value of the 2029 Debentures and the 2026 Debentures (the “Debentures”) in cash, WESCO is not required to include any shares underlying the Debentures in its diluted weighted average shares outstanding until the average stock price per share for the period exceeds the conversion price of the respective Debentures. At such time, only the number of shares that would be issuable (under the treasury stock method of accounting for share dilution) will be included, which is based upon the amount by which the average stock price exceeds the conversion price. The conversion prices of the 2029 Debentures and 2026 Debentures are $28.87 and $88.15, respectively. Share dilution is limited to a maximum of 11,950,622 shares for the 2029 Debentures and 635 shares for the 2026 Debentures. Share dilution for the 2026 Debentures reflects the impact of the convertible debt exchange. For the periods ended December 31, 2011 and 2010, the effect of the 2029 debentures on diluted earnings per share attributable to WESCO International, Inc. was a decrease of $0.47 and $0.16, respectively. There was no impact of the Debentures on diluted earnings per share attributable to WESCO International, Inc. for the year ended December 31, 2009.

EMPLOYEE BENEFIT PLANS	12 Months Ended
EMPLOYEE BENEFIT PLANS	Dec. 31, 2011
Compensation and Retirement Disclosure [Abstract]
EMPLOYEE BENEFIT PLANS	EMPLOYEE BENEFIT PLANS A majority of WESCO’s employees are covered by defined contribution retirement savings plans for their service rendered subsequent to WESCO’s formation. WESCO also offers a deferred compensation plan for select individuals. For U.S. participants, WESCO will make contributions in an amount equal to 50% of the participant’s total monthly contributions up to a maximum of 6% of eligible compensation. For Canadian participants, WESCO will make contributions in an amount ranging from 1% to 7% of the participant’s eligible compensation based on years of continuous service. In addition, employer contributions may be made at the discretion of the Board of Directors. Discretionary employer contributions charges of $16.2 million and $14.2 million were incurred in 2011 and 2010, respectively. All discretionary contributions were suspended during 2009 due to cost reductions actions; accordingly, no discretionary charges were incurred. For the years ended December 31, 2011, 2010 and 2009, WESCO incurred charges of $27.6 million, $25.3 million and $8.3 million, respectively, for all such plans. Contributions are made in cash to employee retirement savings plan accounts. Employees then have the option to transfer balances allocated to their accounts into any of the available investment options, including WESCO common stock.

- Definition

The entire disclosure for pension and other postretirement benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-Name Emerging Issues Task Force (EITF)
-Number 03-2
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 30
-Paragraph 26
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 10: http://www.xbrl.org/2003/role/presentationRef
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Reference 11: http://www.xbrl.org/2003/role/presentationRef
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-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 132R
-Paragraph 5, 6, 7, 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 13: http://www.xbrl.org/2003/role/presentationRef
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-Name Implementation Guide (Q and A)
-Number FAS88
-Paragraph 63
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 14: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 715
-URI http://asc.fasb.org/topic&trid=2235017

+ Details

STOCK-BASED COMPENSATION STOCK-BASED COMPENSATION

12 Months Ended

Dec. 31, 2011

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

STOCK-BASED COMPENSATION

WESCO has sponsored four stock option plans: the 1999 Long-Term Incentive Plan (“LTIP”), the 1998 Stock Option Plan, the Stock Option Plan for Branch Employees and the 1994 Stock Option Plan. The LTIP was designed to be the successor plan to all prior plans. Any shares remaining reserved for future issuance under the prior plans are available for issuance under the LTIP. The LTIP and predecessor plans are administered by the Compensation Committee of the Board of Directors.

An initial reserve of 6,936,000 shares of common stock has been authorized for issuance under the LTIP. This reserve automatically increases by (i) the number of shares of common stock covered by unexercised options granted under prior plans that are canceled or terminated after the effective date of the LTIP, and (ii) the number of shares of common stock surrendered by employees to pay the exercise price and/or minimum withholding taxes in connection with the exercise of stock options granted under our prior plans. As of December 31, 2011, 2.7 million shares of common stock were reserved under the LTIP for future equity award grants. In December 2003, in a privately negotiated transaction, WESCO redeemed the net equity value of stock options originally granted in 1994 and 1995, representing approximately 2.9 million shares. These shares are included in the reserve of common stock available for issuance under the LTIP.

Awards granted vest and become exercisable once criteria based on time is achieved. All awards vest immediately in the event of a change in control. Each award terminates on the tenth anniversary of its grant date unless terminated sooner under certain conditions.

As of December 31, 2011, there was $16.7 million of total unrecognized compensation expense related to non-vested stock-based compensation arrangements for all awards previously made of which approximately $10.0 million is expected to be recognized in 2012, $6.1 million in 2013 and $0.6 million in 2014.

The total intrinsic value of awards exercised during the years ended December 31, 2011 and 2010 was $13.8 million and $9.9 million, respectively. The total amount of cash received from the exercise of options was $0.4 million and $1.8 million, respectively. The tax benefit associated with the exercise of stock options and stock-settled stock appreciation rights totaled $5.4 million and $3.1 million in 2011 and 2010, respectively. WESCO uses the direct only method and tax law ordering approach to calculate the tax effects of stock-based compensation. The tax benefit was recorded as a credit to additional paid-in capital.

The following table sets forth a summary of both stock options and stock appreciation rights and related information for the years indicated:



	2011							2010				2009
	Awards		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life	Aggregate Intrinsic Value (In thousands)		Awards		Weighted Average Exercise Price		Awards		Weighted Average Exercise Price
Beginning of year	4,498,303		$	36.38				4,226,153		$	35.30	3,933,035		$	36.44
Granted	399,260		59.16					708,949		33.19		815,231		25.37
Exercised	(543,154	)	25.83					(335,155	)	14.79		(253,253	)	12.55
Cancelled	(87,876	)	46.86					(101,644	)	40.62		(268,860	)	43.22
End of year	4,266,533		39.64		6.1	$	63,668	4,498,303		36.38		4,226,153		35.30
Exercisable at end of year	3,176,161		$	39.23	5.3	$	48,986	3,011,120		$	38.65	2,661,320		$	35.61

The following table sets forth a summary of restricted stock units and related information for the year ended December 31, 2011:



	Awards		Weighted Average Fair Value
Unvested at December 31, 2010	392,493		$	28.36
Granted	53,852		60.05
Vested	(236,913	)	27.93
Forfeited	(6,141	)	32.02
Unvested at December 31, 2011	203,291		$	37.16

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 64, 65, A240
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Statement of Position (SOP)
-Number 93-6
-Paragraph 53
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Staff Accounting Bulletin (SAB)
-Number Topic 14

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 50
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666

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-URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929

+ Details

COMMITMENTS AND CONTINGENCIES

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies Disclosure [Abstract]

COMMITMENTS AND CONTINGENCIES

Future minimum rental payments required under operating leases, primarily for real property that have noncancelable lease terms in excess of one year as of December 31, 2011, are as follows:



(In thousands)
2012	$	47,015
2013	32,768
2014	24,470
2015	20,580
2016	16,276
Thereafter	42,498

Rental expense for the years ended December 31, 2011, 2010 and 2009 was $48.0 million, $45.4 million and $46.3 million, respectively.

From time to time, a number of lawsuits and claims have been or may be asserted against WESCO relating to the conduct of its business, including routine litigation relating to commercial and employment matters. The outcomes of litigation cannot be predicted with certainty, and some lawsuits may be determined adversely to WESCO. However, management does not believe that the ultimate outcome is likely to have a material adverse effect on WESCO’s financial condition or liquidity, although the resolution in any fiscal quarter of one or more of these matters may have a material adverse effect on WESCO’s results of operations for that period.

WESCO is a co-defendant in a lawsuit filed in a state court in Indiana in which a customer alleges that WESCO sold defective products manufactured or remanufactured by others and is seeking monetary damages in the amount of approximately $50 million. WESCO has denied any liability, continues to believe that it has meritorious defenses and intends to vigorously defend itself against these allegations. Accordingly, no liability was recorded for this matter as of December 31, 2011. Furthermore, due to the uncertainty of this litigation, WESCO is not currently able to reasonably estimate the possible loss or range of loss from this legal proceeding.

- Definition

The entire disclosure for commitments and contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Interpretation (FIN)
-Number 14
-Paragraph 3
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9, 10, 11, 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.25)
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+ Details

SEGMENTS AND RELATED INFORMATION

12 Months Ended

Dec. 31, 2011

Segment Reporting [Abstract]

SEGMENTS AND RELATED INFORMATION

WESCO provides distribution of product and services through its ten operating segments which have been aggregated as one reportable segment. WESCO has over 250,000 unique product stock keeping units and markets more than 1,000,000 products for customers. There were no material amounts of sales or transfers among geographic areas and no material amounts of export sales.

WESCO attributes revenues from external customers to individual countries on the basis of the point of sale. The following table sets forth information about WESCO by geographic area:



	Net Sales Year Ended December 31,												Long-Lived Assets December 31,
(In thousands)	2011				2010				2009				2011		2010		2009
United States	$	4,994,641	82	%	$	4,198,420	83	%	$	3,928,182	85	%	$	131,989	$	117,768	$	112,955
Canada	900,551		15	%	682,415		13	%	559,367		12	%	24,609		12,446		12,343
Mexico	84,871		1	%	51,413		1	%	39,032		1	%	572		641		624
Subtotal North American Operations	5,980,063				4,932,248				4,526,581				157,170		130,855		125,922
Other Foreign	145,655		2	%	131,614		3	%	97,373		2	%	771		325		74
Total U.S. and Foreign	$	6,125,718			$	5,063,862			$	4,623,954			$	157,941	$	131,180	$	125,996

The following table sets forth sales information about WESCO’s sales by product category:



Year Ended December 31,	2011	2010	2009
(percentages based on total sales)
General and Industrial Supplies	34%	35%	35%
Wire, Cable and Conduit	18%	18%	18%
Data and Broadband Communications	17%	15%	14%
Power Distribution Equipment	11%	12%	13%
Lighting and Controls	9%	10%	11%
Control, Automation and Motors	11%	10%	9%

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 131
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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+ Details

OTHER FINANCIAL INFORMATION

12 Months Ended

Dec. 31, 2011

Condensed Financial Information [Abstract]

OTHER FINANCIAL INFORMATION

WESCO Distribution, a 100% owned subsidiary of WESCO International, has outstanding $150.0 million in aggregate principal amount of 2017 Notes, and WESCO International has outstanding $0.1 million in aggregate principal amount of 2026 Debentures and $345.0 million in aggregate principal amount of 2029 Debentures. The 2017 Notes are fully and unconditionally guaranteed by WESCO International on a subordinated basis to all existing and future senior indebtedness of WESCO International. The 2026 Debentures and 2029 Debentures are fully and unconditionally guaranteed by WESCO Distribution on a senior subordinated basis to all existing and future senior indebtedness of WESCO Distribution.

Condensed consolidating financial information for WESCO International, WESCO Distribution, Inc. and the non-guarantor subsidiaries is as follows:

CONDENSED CONSOLIDATING BALANCE SHEETS



	December 31, 2011
	(In thousands)
	WESCO International, Inc.		WESCO Distribution, Inc.		Non-Guarantor Subsidiaries		Consolidating and Eliminating Entries			Consolidated
Cash and cash equivalents	$	5	$	44,412	$	19,452	$	—		$	63,869
Trade accounts receivable, net	—		—		939,422		—			939,422
Inventories, net	—		341,423		285,544		—			626,967
Other current assets	270		32,548		74,344		—			107,162
Total curent assets	275		418,383		1,318,762		—			1,737,420
Intercompany receivables, net	—		—		1,881,208		(1,881,208		)	—
Property, buildings and equipment, net	—		54,038		79,512		—			133,550
Intangible assets, net	—		6,981		149,893		—			156,874
Goodwill and other intangibles, net	—		246,125		762,002		—			1,008,127
Investments in affiliates and other noncurrent assets	2,219,142		3,412,735		31,745		(5,621,141		)	42,481
Total assets	$	2,219,417	$	4,138,262	$	4,223,122	$	(7,502,349	)	$	3,078,452
Accounts payable	$	—	$	423,509	$	219,268	$	—		$	642,777
Other current liabilities	7,797		6,510		188,762		—			203,069
Total current liabilities	7,797		430,019		408,030		—			845,846
Intercompany payables, net	668,447		1,142,761		—		(1,811,208		)	—
Long-term debt	169,054		188,081		285,787		—			642,922
Other noncurrent liabilities	28,131		163,177		52,466		—			243,774
Stockholders’ equity	1,345,988		2,214,224		3,406,839		(5,621,141		)	1,345,910
Total liabilities and stockholders’ equity	$	2,219,417	$	4,138,262	$	4,153,122	$	(7,432,349	)	$	3,078,452



	December 31, 2010
	(In thousands)
	WESCO International, Inc.			WESCO Distribution, Inc.		Non-Guarantor Subsidiaries			Consolidating and Eliminating Entries			Consolidated
Cash and cash equivalents	$	1		$	32,341	$	21,235		$	—		$	53,577
Trade accounts receivable, net	—			—		792,681			—			792,681
Inventories, net	—			321,111		267,737			—			588,848
Other current assets	(4,492		)	90,105		(7,033		)	—			78,580
Total current assets	(4,491		)	443,557		1,074,620			—			1,513,686
Intercompany receivables, net	—			—		1,933,768			(1,933,768		)	—
Property, buildings and equipment, net	—			41,115		76,930			—			118,045
Intangible assets, net	—			7,817		152,490			—			160,307
Goodwill and other intangibles, net	—			240,313		745,401			—			985,714
Investments in affiliates and other noncurrent assets	2,002,358			3,237,808		39,527			(5,230,671		)	49,022
Total assets	$	1,997,867		$	3,970,610	$	4,022,736		$	(7,164,439	)	$	2,826,774
Accounts payable	$	—		$	349,250	$	188,255		$	—		$	537,505
Other current liabilities	8,016			17,562		145,150			—			170,728
Total current liabilities	8,016			366,812		333,405			—			708,233
Intercompany payables, net	646,607			1,287,161		—			(1,933,768		)	—
Long-term debt	166,573			151,755		407,565			—			725,893
Other noncurrent liabilities	28,077			167,705		48,272			—			244,054
Stockholders’ equity	1,148,594			1,997,177		3,233,494			(5,230,671		)	1,148,594
Total liabilities and stockholders’ equity	$	1,997,867		$	3,970,610	$	4,022,736		$	(7,164,439	)	$	2,826,774

CONDENSED CONSOLIDATING STATEMENTS OF INCOME



	Year ended December 31, 2011
	(In thousands)
	WESCO International, Inc.		WESCO Distribution, Inc.		Non-Guarantor Subsidiaries			Consolidating and Eliminating Entries			Consolidated
Net sales	$	—	$	3,230,753	$	2,998,639		$	(103,674	)	$	6,125,718
Cost of goods sold	—		2,585,978		2,406,845			(103,674		)	4,889,149
Selling, general and administrative expenses	70		546,902		325,011			—			871,983
Depreciation and amortization	—		11,996		19,611			—			31,607
Results of affiliates’ operations	229,621		173,421		—			(403,042		)	—
Interest expense, net	23,990		16,520		13,093			—			53,603
Other income	—		—		—			—			—
Provision for income taxes	9,321		13,157		60,658			—			83,136
Net income (loss)	196,240		229,621		173,421			(403,042		)	196,240
Less: Net loss attributable to noncontrolling interest	—		—		(11		)	—			(11		)
Net income (loss) attributable to WESCO International, Inc.	$	196,240	$	229,621	$	173,432		$	(403,042	)	$	196,251



	Year ended December 31, 2010
	(In thousands)
	WESCO International, Inc.		WESCO Distribution, Inc.			Non-Guarantor Subsidiaries		Consolidating and Eliminating Entries			Consolidated
Net sales	$	—	$	2,820,855		$	2,318,495	$	(75,488	)	$	5,063,862
Cost of goods sold	—		2,262,038			1,878,875		(75,488		)	4,065,425
Selling, general and administrative expenses	234		518,100			245,249		—			763,583
Depreciation and amortization	—		12,581			11,354		—			23,935
Results of affiliates’ operations	153,107		126,711			—		(279,818		)	—
Interest expense, net	27,565		16,816			13,182		—			57,563
Other income	—		(4,285		)	—		—			(4,285		)
Provision for income taxes	9,831		(10,791		)	43,124		—			42,164
Net income (loss) attributable to WESCO International, Inc.	$	115,477	$	153,107		$	126,711	$	(279,818	)	$	115,477

CONDENSED CONSOLIDATING STATEMENTS OF INCOME (continued)



	Year ended December 31, 2009
	(In thousands)
	WESCO International, Inc.			WESCO Distribution, Inc.			Non-Guarantor Subsidiaries		Consolidating and Eliminating Entries			Consolidated
Net sales	$	—		$	3,049,745		$	1,574,209	$	—		$	4,623,954
Cost of goods sold	—			2,470,956			1,253,105		—			3,724,061
Selling, general and administrative expenses	39			503,831			190,026		—			693,896
Depreciation and amortization	—			19,736			6,309		—			26,045
Results of affiliates’ operations	136,606			99,375			—		(235,981		)	—
Interest expense, net	28,014			16,106			9,634		—			53,754
Gain on debt exchange	(5,962		)	—			—		—			(5,962		)
Other income	—			(4,991		)	—		—			(4,991		)
Provision for income taxes	9,427			6,876			15,760		—			32,063
Net income (loss) attributable to WESCO International, Inc.	$	105,088		$	136,606		$	99,375	$	(235,981	)	$	105,088

CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS



	Year ended December 31, 2011
	(In thousands)
	WESCO International, Inc.			WESCO Distribution, Inc.			Non-Guarantor Subsidiaries			Consolidating and Eliminating Entries		Consolidated
Net cash (used) provided by operating activities	$	(19,823	)	$	181,348		$	6,008		$	—	$	167,533
Investing activities:
Capital expenditures	—			(30,546		)	(2,801		)	—		(33,347		)
Acquisition payments	—			(48,093		)	—			—		(48,093		)
Other	—			97			—			—		97
Net cash used in investing activities	—			(78,542		)	(2,801		)	—		(81,343		)
Financing activities:
Net borrowings (repayments)	21,840			(105,931		)	—			—		(84,091		)
Equity transactions	(2,013		)	—			—			—		(2,013		)
Other	—			15,196			—			—		15,196
Net cash provided (used) by financing activities	19,827			(90,735		)	—			—		(70,908		)
Effect of exchange rate changes on cash and cash equivalents	—			—			(4,990		)	—		(4,990		)
Net change in cash and cash equivalents	4			12,071			(1,783		)	—		10,292
Cash and cash equivalents at the beginning of year	1			32,341			21,235			—		53,577
Cash and cash equivalents at the end of period	$	5		$	44,412		$	19,452		$	—	$	63,869



	Year ended December 31, 2010
	(In thousands)
	WESCO International, Inc.			WESCO Distribution, Inc.			Non-Guarantor Subsidiaries			Consolidating and Eliminating Entries		Consolidated
Net cash (used) provided by operating activities	$	(96,685	)	$	301,578		$	(77,610	)	$	—	$	127,283
Investing activities:
Capital expenditures	—			(14,702		)	(430		)	—		(15,132		)
Acquisition payments	—			(265,397		)	—			—		(265,397		)
Sale of subsidiary	—			40,000			—			—		40,000
Other	—			19,986			—			—		19,986
Net cash used in investing activities	—			(220,113		)	(430		)	—		(220,543		)
Financing activities:
Net borrowings (repayments)	92,350			(58,894		)	—			—		33,456
Equity transactions	4,333			—			—			—		4,333
Other	—			(7,154		)	—			—		(7,154		)
Net cash provided (used) by financing activities	96,683			(66,048		)	—			—		30,635
Effect of exchange rate changes on cash and cash equivalents	—			—			3,873			—		3,873
Net change in cash and cash equivalents	(2		)	15,417			(74,167		)	—		(58,752		)
Cash and cash equivalents at the beginning of year	3			16,924			95,402			—		112,329
Cash and cash equivalents at the end of period	$	1		$	32,341		$	21,235		$	—	$	53,577

CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS (continued)



	Year ended December 31, 2009
	(In thousands)
	WESCO International, Inc.			WESCO Distribution, Inc.			Non-Guarantor Subsidiaries			Consolidating and Eliminating Entries		Consolidated
Net cash (used) provided by operating activities	$	(61,795	)	$	335,097		$	18,362		$	—	$	291,664
Investing activities:
Capital expenditures	—			(12,161		)	(809		)	—		(12,970		)
Acquisition payments	—			(262		)	—			—		(262		)
Other	—			2,540			—			—		2,540
Net cash used in investing activities	—			(9,883		)	(809		)	—		(10,692		)
Financing activities:
Net borrowings (repayments)	59,235			(314,817		)	—			—		(255,582		)
Equity transactions	2,563			—			—			—		2,563
Other	—			(11,926		)	—			—		(11,926		)
Net cash provided (used) by financing activities	61,798			(326,743		)	—			—		(264,945		)
Effect of exchange rate changes on cash and cash equivalents	—			—			9,964			—		9,964
Net change in cash and cash equivalents	3			(1,529		)	27,517			—		25,991
Cash and cash equivalents at the beginning of year	—			18,453			67,885			—		86,338
Cash and cash equivalents at the end of period	$	3		$	16,924		$	95,402		$	—	$	112,329

SELECTED QUARTERLY FINANCIAL DATA

12 Months Ended

Dec. 31, 2011

Quarterly Financial Information Disclosure [Abstract]

SELECTED QUARTERLY FINANCIAL DATA

SELECTED QUARTERLY FINANCIAL DATA (unaudited)

The following table sets forth selected quarterly financial data for the years ended December 31, 2011 and 2010:



	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
2011
Net Sales	$	1,431,305	$	1,524,515	$	1,580,376	$	1,589,522
Cost of goods sold	1,145,255		1,217,666		1,264,745		1,261,483
Income from operations	64,745		84,996		91,752		91,486
Income before income taxes	52,104		71,065		76,673		79,534
Net income	37,305		50,207		53,890		54,838
Net income attributable to WESCO International, Inc.	37,305		50,207		53,890		54,849
Basic earnings per share attributable to WESCO International, Inc.^(A)	0.87		1.16		1.24		1.27
Diluted earnings per share attributable to WESCO International, Inc.^(B)	0.74		1.00		1.11		1.12

2010
Net Sales	$	1,148,599	$	1,259,121	$	1,324,555	$	1,331,587
Cost of goods sold	921,183		1,016,169		1,066,769		1,061,304
Income from operations	38,276		51,355		61,246		60,042
Income before income taxes	27,252		38,733		47,498		44,158
Net income	19,200		27,793		33,661		34,823
Net income attributable to WESCO International, Inc.	19,200		27,793		33,661		34,823
Basic earnings per share attributable to WESCO International, Inc.^(A)	0.45		0.65		0.79		0.82
Diluted earnings per share attributable to WESCO International, Inc.^(B)	0.44		0.60		0.74		0.72

_________________________


^(A)	Earnings per share (EPS) in each quarter is computed using the weighted average number of shares outstanding during the quarter while EPS for the full year is computed by taking the average of the weighted average number of shares outstanding each quarter. Thus, the sum of the four quarters’ EPS may not equal the full-year EPS.


^(B)	Diluted earnings per share (DEPS) in each quarter is computed using the weighted average number of shares outstanding during that quarter while DEPS for the full year is computed by taking the average of the weighted average number of shares outstanding each quarter. Thus, the sum of the four quarters’ DEPS may not equal the full-year DEPS.

- Definition

The entire disclosure for the quarterly financial data in the annual financial statements. The disclosure may include a tabular presentation of financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income or loss before extraordinary items and earnings per share data. It also includes an indication if the information in the note is unaudited, comments on the aggregate effect of year-end adjustments, and an explanation of matters or transactions that affect comparability or are pertinent to an understanding of the information furnished.

+ References + Details

SUBSEQUENT EVENT	12 Months Ended
SUBSEQUENT EVENT	Dec. 31, 2011
Subsequent Events [Abstract]
SUBSEQUENT EVENT	SUBSEQUENT EVENT On January 3, 2012, WESCO Distribution, Inc. completed its acquisition of RS Electronics, a leading North American distributor of electronic and electrical products serving primarily the industrial, medical equipment, automotive, and contract manufacturing end markets with eight branches located in the midwest and southeastern United States and approximately $60 million in annual sales. WESCO funded the purchase price paid at closing with cash and borrowings under the Receivables Facility. The purchase price allocation will be completed during the first quarter of 2012.

Schedule II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2011

Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation and Qualifying Accounts

Schedule II—Valuation and Qualifying Accounts



	Col. A		Col. B		Col. C		Col. D			Col. E
	(In thousands)
	Balance at Beginning		Charged to		Charged to Other					Balance at
(In thousands)	of Period		Expense		Accounts		Deductions⁽¹⁾			End of Period
Allowance for doubtful accounts
Year ended December 31, 2011	$	18,562	$	6,583	$	—	$	(3,555	)	$	21,590
Year ended December 31, 2010	20,060		6,439		—		(7,937		)	18,562
Year ended December 31, 2009	19,665		6,072		2,059		(7,736		)	20,060

_________________________


⁽¹⁾	Includes a reduction in the allowance for doubtful accounts due to write-off of accounts receivable.

ACCOUNTING POLICIES (Policies)	12 Months Ended
ACCOUNTING POLICIES (Policies)	Dec. 31, 2011
Accounting Policies [Abstract]
Basis of Consolidation	Basis of Consolidation The consolidated financial statements include the accounts of WESCO International, Inc. (“WESCO International”) and all of its subsidiaries. All significant intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with generally accepted accounting principles in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying disclosures. Although these estimates are based on management’s best knowledge of current events and actions WESCO may undertake in the future, actual results may ultimately differ from the estimates.
Revenue Recognition	Revenue Recognition Revenues are recognized for product sales when title, ownership and risk of loss pass to the customer or for services when the service is rendered. In the case of stock sales and special orders, a sale occurs at the time of shipment from WESCO's distribution point, as the terms of WESCO’s sales are predominantly FOB shipping point. In cases where WESCO processes customer orders but ships directly from its suppliers, revenue is recognized once product is shipped and title has passed. In all cases, revenue is recognized once the sales price to the customer is fixed or is determinable and WESCO has reasonable assurance as to the collectability. In certain customer arrangements, WESCO provides services such as inventory management. WESCO may perform some or all of the following services for customers: determine inventory stocking levels; establish inventory reorder points; launch purchase orders; receive material; put away material; and pick material for order fulfillment. WESCO recognizes revenue for services rendered during the period based upon a previously negotiated fee arrangement. WESCO also sells inventory to these customers and recognizes revenue at the time title and risk of loss transfers to the customer.
Selling, General and Administrative Expenses	Selling, General and Administrative Expenses WESCO includes warehousing, purchasing, branch operations, information services, and marketing and selling expenses in this category, as well as other types of general and administrative costs.
Supplier Volume Rebates	Supplier Volume Rebates WESCO receives volume rebates from certain suppliers based on contractual arrangements with such suppliers. An asset, included within other accounts receivable on the balance sheet, represents the estimated amounts due to WESCO under the rebate provisions of such contracts. The corresponding rebate income is recorded as a reduction of cost of goods sold. The appropriate level of such income is derived from the level of actual purchases made by WESCO from suppliers.
Shipping and Handling Costs and Fees	Shipping and Handling Costs and Fees WESCO records the costs and fees associated with transporting its products to customers as a component of selling, general and administrative expenses.
Cash Equivalents	Cash Equivalents Cash equivalents are defined as highly liquid investments with original maturities of 90 days or less when purchased.
Asset Securitization	Asset Securitization WESCO maintains control of the receivables transferred pursuant to its accounts receivable securitization program (the “Receivables Facility”); therefore the transfers do not qualify for “sale” treatment. As a result, the transferred receivables remain on the balance sheet, and WESCO recognizes the related secured borrowing. The expenses associated with the Receivables Facility are reported as interest expense in the statement of income.
Allowance for Doubtful Accounts	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-top:8px;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"></font><font style="font-family:inherit;font-size:10pt;font-style:italic;">Allowance for Doubtful Accounts</font></div><div style="line-height:120%;padding-top:8px;text-align:left;text-indent:20px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">WESCO maintains allowances for doubtful accounts for estimated losses resulting from the inability of its customers to make required payments. WESCO has a systematic procedure using estimates based on historical data and reasonable assumptions of collectability made at the local branch level and on a consolidated corporate basis to calculate the allowance for doubtful accounts. If the financial condition of WESCO’s customers were to deteriorate, resulting in an impairment of their ability to make payments, additional allowances may be required. </font></div></div>
Inventories	Inventories Inventories primarily consist of merchandise purchased for resale and are stated at the lower of cost or market. Cost is determined principally under the average cost method. WESCO makes provisions for obsolete or slow-moving inventories as necessary to reflect reduction in inventory value. WESCO writes down its inventory to its net realizable value based on internal factors derived from historical analysis of actual losses. Looking back, WESCO identifies items at risk of becoming obsolete, defined as being in excess of 36 months supply relative to demand or movement. WESCO then analyzes in a detailed manner the ultimate disposition of the previously identified excess inventory items, such as sold, returned to supplier, or scrapped. This item by item analysis allows WESCO to develop an estimate which represents the historical likelihood that an item identified as being in excess supply ultimately becomes obsolete. On a current basis, WESCO applies the estimate to inventory items currently in excess of 36 months supply, and reduces its inventory carrying value by the derived amount.
Other Assets	Other Assets WESCO amortizes deferred financing fees over the term of the various debt instruments.
Property, Buildings and Equipment	Property, Buildings and Equipment Property, buildings and equipment are recorded at cost. Depreciation expense is determined using the straight-line method over the estimated useful lives of the assets. Leasehold improvements are amortized over either their respective lease terms or their estimated lives, whichever is shorter. Estimated useful lives range from five to forty years for leasehold improvements and buildings and three to ten years for furniture, fixtures and equipment. Capitalized computer software costs are amortized using the straight-line method over the estimated useful life, typically three to five years, and are reported at the lower of unamortized cost or net realizable value. Expenditures for new facilities and improvements that extend the useful life of an asset are capitalized. Ordinary repairs and maintenance are expensed as incurred. When property is retired or otherwise disposed of, the cost and the related accumulated depreciation are removed from the accounts and any related gains or losses are recorded and reported as selling, general and administrative expenses. WESCO assesses its long-lived assets for impairment by periodically reviewing operating performance and respective utilization of real and tangible assets. Upon closure of any branch, asset usefulness and remaining life are evaluated and any charges taken as appropriate.
Goodwill and Intangible Assets	Goodwill and Indefinite Life Intangible Assets Goodwill and indefinite life intangible assets are tested for impairment annually during the fourth quarter using information available at the end of September, or more frequently if events or circumstances occur indicating that their carrying value may not be recoverable. The evaluation of impairment involves comparing the current fair value of goodwill and indefinite life intangible assets to the recorded value. WESCO estimates the fair value of goodwill using a combination of discounted cash flow analyses and market multiples. Assumptions used for these fair value techniques are based on a combination of historical results, current forecasts, market data and recent economic events. WESCO evaluates the recoverability of indefinite life intangible assets using a discounted cash flow analysis based on projected financial information. The determination of fair value involves significant judgment and management applies its best judgment when assessing the reasonableness of financial projections. At December 31, 2011 and 2010, goodwill and trademarks totaled $1,055.0 million and $1,031.4 million, respectively. No impairment losses were identified in 2011 as a result of this review. However, two trademarks valued at $18.1 million are sensitive to a further decline in financial performance. WESCO is taking actions to improve its future financial performance; however, WESCO cannot predict whether or not there will be certain events that could adversely affect the reported value of these trademarks. Definite Lived Intangible Assets Intangible assets are amortized over 4 to 19 years. A portion of intangible assets related to customer relationships are amortized using an accelerated method whereas all other intangible assets subject to amortization use a straight-line method which reflects the pattern in which the economic benefits of the respective assets are consumed or otherwise used. Intangible assets are tested for impairment if events or circumstances occur indicating that the respective asset might be impaired.
Insurance Programs	Insurance Programs WESCO uses commercial insurance for auto, workers’ compensation, casualty and health claims as a risk-reduction strategy to minimize catastrophic losses. The Company’s strategy involves large deductibles where WESCO must pay all costs up to the deductible amount. WESCO estimates the reserve based on historical incident rates and costs. The assumptions included in developing this accrual include the period of time from incurrence of a claim until the claim is paid by the insurance provider.
Income Taxes	Income Taxes Income taxes are accounted for under the liability method in accordance with income tax accounting guidance. Deferred tax assets and liabilities are determined based on differences between the financial reporting and tax basis of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. Valuation allowances, if any, are provided when it is more likely than not that a portion or all of a deferred tax asset may not be realized. WESCO accounts for uncertainty in income taxes using a recognition threshold and measurement attribute prescribed by income tax accounting guidance. WESCO frequently reviews tax issues and positions taken on tax returns to determine the need and amount of contingency reserves necessary to cover any probable audit adjustments. WESCO recognizes interest related to unrecognized tax benefits as part of interest expense. Penalties are recognized as part of income tax expense.
Convertible Debentures	Convertible Debentures WESCO separately accounts for the liability and equity components of its convertible debentures in a manner that reflects its non-convertible debt borrowing rate. WESCO estimates its non-convertible debt borrowing rate through a combination of discussions with its financial institutions and review of relevant market data. The discounts to the convertible note balances are amortized to interest expense, using the effective interest method, over the implicit life of the Debentures.
Foreign Currency	Foreign Currency The local currency is the functional currency for the majority of WESCO’s operations outside the United States. Assets and liabilities of these operations are translated to U.S. dollars at the exchange rate in effect at the end of each period. Income statement accounts are translated at the average exchange rate prevailing during the period. Translation adjustments arising from the use of differing exchange rates from period to period are included as a component of other comprehensive income within stockholders’ equity. Gains and losses from foreign currency transactions are included in net income for the period.
Share-based Compensation	Stock-Based Compensation WESCO’s stock-based employee compensation plans are comprised of stock options, stock-settled stock appreciation rights and restricted stock units. Compensation cost for all stock-based awards is measured at fair value on the date of grant, and compensation cost is recognized, net of estimated forfeitures, over the service period for awards expected to vest. The fair value of stock options and stock-settled appreciation rights is determined using the Black-Scholes valuation model. Expected volatilities are based on historical volatility of WESCO’s common stock. The expected life of stock options and stock-settled appreciation rights is estimated using historical data pertaining to option exercises and employee terminations. The risk-free rate is based on the U.S. Treasury yields in effect at the time of grant. The forfeiture assumption is based on WESCO’s historical employee behavior that is reviewed on an annual basis. The fair value of restricted stock units is determined by the grant-date closing price of WESCO’s common stock. No dividends are assumed for stock based awards.
Treasury Stock	Treasury Stock Common stock purchased for treasury is recorded at cost. At the date of subsequent reissue, the treasury stock account is reduced by the cost of such stock, with cost determined on a weighted average basis.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The Company’s financial instruments consist of cash and cash equivalents, accounts receivable, accounts payable and other accrued liabilities, and outstanding indebtedness. The estimated fair value of the Company’s outstanding indebtedness described in Note 7 at December 31, 2011 and 2010 was $1,178.9 million and $1,269.7 million, respectively. The aggregate fair value of the senior notes and debentures was approximately $850.9 million and $860.2 million at December 31, 2011 and 2010, respectively. The fair values of these fixed rate facilities are estimated based upon market price quotes. The fair values of the mortgage facility, the Receivables Facility and our revolving credit facility ("the Revolving Credit Facility"), approximated carrying values. The fair values for these facilities are based upon market price quotes and market comparisons available for instruments with similar terms and maturities. For all remaining WESCO financial instruments, carrying values are considered to approximate fair value due to their short maturities.
Environmental Expenditures	Environmental Expenditures WESCO has facilities and operations that distribute certain products that must comply with environmental regulations and laws. Expenditures for current operations are expensed or capitalized, as appropriate. Expenditures relating to existing conditions caused by past operations, and that do not contribute to future revenue, are expensed. Liabilities are recorded when remedial efforts are probable and the costs can be reasonably estimated.

ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2011

Accounting Policies [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

WESCO granted the following stock-settled stock appreciation rights and restricted stock units at the following weighted average assumptions:



	2011	2010	2009
Stock-settled appreciation rights granted	399,260	708,949	815,231
Restricted stock units	53,852	153,318	245,997
Risk free interest rate	2.3%	1.8%	2.3%
Expected life (in years)	5.0	5.0	4.5
Expected volatility	49%	49%	51%

GOODWILL AND INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table sets forth the changes in the carrying amount of goodwill:



	Year Ended December 31
	2011			2010
	(In thousands)
Beginning balance January 1	$	985,714		$	863,410
Translation adjustments and payments to goodwill for prior acquisitions	(4,734		)	2,467
Additions to goodwill for acquisitions	27,147			119,837
Ending balance December 31	$	1,008,127		$	985,714

Schedule of Intangible Assets by Major Class

The components of intangible assets are as follows:



	December 31, 2011								December 31, 2010
	Life	Gross Carrying Amount⁽¹⁾		Accumulated Amortization⁽¹⁾			Net Carrying Amount		Gross Carrying Amount⁽¹⁾		Accumulated Amortization⁽¹⁾			Net Carrying Amount
	(In thousands)
Intangible Assets:
Trademarks	Indefinite	$	46,852	$	—		$	46,852	$	45,687	$	—		$	45,687
Non-compete agreements	5-7	1,252		(1,038		)	214		1,252		(895		)	357
Customer relationships	4-19	70,670		(32,527		)	38,143		65,967		(25,933		)	40,034
Distribution agreements	10-19	35,291		(6,897		)	28,394		31,084		(4,950		)	26,134
Patents	10	48,310		(5,039		)	43,271		48,310		(215		)	48,095
		$	202,375	$	(45,501	)	$	156,874	$	192,300	$	(31,993	)	$	160,307

_________________________


⁽¹⁾	Excludes the original cost and accumulated amortization of fully-amortized intangibles.

Schedule of Expected Amortization Expense

The following table sets forth the estimated amortization expense for intangibles for the next five years (in thousands):



	Estimated
	Amortization
For the year ended December 31,	Expense
2012	$	12,002
2013	11,831
2014	11,262
2015	11,262
2016	11,262

- Definition

Tabular disclosure of goodwill by reportable segment and in total. Disclosure details may include, but are not limited to, the carrying amount of goodwill, goodwill acquired during the year, goodwill impairment losses recognized, goodwill written-off due to the sale of a business unit, goodwill not yet allocated, and any other changes to goodwill.

+ References + Details

ACQUISITIONS (Tables)

12 Months Ended

Dec. 31, 2011

Business Combinations [Abstract]

Schedule of Business Acquisitions, by Acquisition

The following table sets forth the consideration paid for acquisitions:



Year Ended December 31	2011			2010
(In thousands)
Details of acquisitions:
Fair value of assets acquired	$	54,663		$	297,849
Fair value of liabilities assumed	(6,570		)	(31,162		)
Deferred acquisition payments	—			185
Cash paid for acquisitions	$	48,093		$	266,872
Supplemental cash flow disclosure related to acquisitions:
Cash paid for acquisitions	$	48,093		$	266,872
Less: cash acquired	—			(1,475		)
Cash paid for acquisitions, net of cash acquired	$	48,093		$	265,397

Schedule of Purchase Price Allocation

The allocation of assets acquired and liabilities assumed for the TVC Communications acquisition is summarized below:



	TVC Communications, LLC
(In thousands)
Assets Acquired
Cash and cash equivalents	$	1,475
Trade accounts receivable	38,744
Other accounts receivable	978
Inventories	41,313
Prepaid expenses and other current assets	1,377
Property, buildings and equipment	2,268
Intangible assets	86,442
Goodwill	109,183
Other noncurrent assets	158
Total assets acquired	281,938

Liabilities Assumed
Accounts payable	24,249
Accrued payroll and benefit costs	1,183
Other current liabilities	4,019
Total liabilities assumed	29,451

Fair value of net assets acquired, including intangible assets	$	252,487

Business Acquisition, Pro Forma Information

Unaudited pro forma results of operations (in thousands, except per share data) for the twelve months ended December 31, 2010 and 2009 are included below as if the acquisition occurred on the first day of the respective periods. The summary of the unaudited pro forma results of operations is not necessarily indicative of what WESCO's results of operations would have been had TVC Communications been acquired at the beginning of 2009, nor does it purport to represent results of operations for any future periods. Seasonality of sales is not a significant factor to these pro forma combined results of operations.



Year Ended December 31	2010		2009
(In thousands, except per share data)
Net Sales	$	5,315,929	$	4,907,441
Net Income	132,455		121,306
Earnings per common share:
Basic	$	3.12	$	2.87
Diluted	$	2.87	$	2.84

- Definition

Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate.

+ References + Details

- Definition

Tabular disclosure of a material business combination completed during the period, including background, timing, and recognized assets and liabilities. This table does not include leveraged buyouts.

+ References

+ Details

PROPERTY, BUILDINGS AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2011

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

The following table sets forth the components of property, buildings and equipment:



	December 31,
	2011		2010
	(In thousands)
Buildings and leasehold improvements	96,527		92,862
Furniture, fixtures and equipment	152,164		140,427
Software costs	44,909		77,335
	293,600		310,624
Accumulated depreciation and amortization	(190,385	)	(215,768	)
	103,215		94,856
Land	21,097		21,169
Construction in progress	9,238		2,020
	133,550		118,045

DEBT (Tables)

12 Months Ended

Dec. 31, 2011

Debt Disclosure [Abstract]

Schedule of Debt

The following table sets forth WESCO’s outstanding indebtedness:



	As of December 31,
	2011			2010
	(In thousands)
Mortgage financing facility	$	37,564		$	39,239
Accounts receivable securitization facility	250,000			370,000
Revolving credit facility	36,792			—
7.50% Senior Subordinated Notes due 2017	150,000			150,000
1.75% Convertible Senior Debentures due 2026, less debt discount of $0 and $7 in 2011 and 2010, respectively	56			214
6.0% Convertible Senior Debentures due 2029, less debt discount of $175,908 and $178,420 in 2011 and 2010, respectively	169,054			166,580
Acquisition related notes	85			204
Capital leases	2,521			3,167
Other	3,261			477
Total debt	649,333			729,881
Less current portion	(6,411		)	(3,988		)
Total long-term debt	$	642,922		$	725,893

Outstanding Convertible Debenture Schedule

The following table sets forth the components of WESCO’s outstanding convertible debenture indebtedness:



	December 31, 2011							December 31, 2010
	Principal Balance		Discount			Net Carrying Amount		Principal Balance		Discount			Net Carrying Amount
						(In thousands)
Convertible Debentures:
2026	$	56	$	—		$	56	$	221	$	(7	)	$	214
2029	344,962		(175,908		)	169,054		345,000		(178,420		)	166,580
	$	345,018	$	(175,908	)	$	169,110	$	345,221	$	(178,427	)	$	166,794

Schedule of Maturities of Long-term Debt

The following table sets forth the aggregate principal repayment requirements for all indebtedness for the next five years and thereafter, as of December 31, 2011:



(In thousands)
2012	$	6,411
2013	36,594
2014	250,328
2015	133
2016	36,813
Thereafter	494,962
Total payments on debt	825,241
Debt discount on convertible debentures	(175,908		)
Total long-term debt	$	649,333

INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2011

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense

The following table sets forth the components of the provision for income taxes:



	Year Ended December 31
	2011			2010			2009
				(In thousands)
Current taxes:
Federal⁽¹⁾	$	60,415		$	11,363		$	30,136
State	5,705			2,018			2,355
Foreign	2,643		7,801	7,801			7,531
Total current	68,763			21,182			40,022
Deferred taxes:
Federal	9,692			21,069			5,351
State	2,187			1,112			1,841
Foreign	2,494			(1,199		)	(15,151		)
Total deferred	14,373			20,982			(7,959		)
	$	83,136		$	42,164		$	32,063

_________________________


⁽¹⁾	Tax benefits related to stock options and other equity instruments recorded directly to additional paid in capital totaled $5.6 million, $8.2 million and $59.7 million in 2011, 2010 and 2009, respectively.

Schedule of Income before Income Tax, Domestic and Foreign

The following table sets forth the components of income before income taxes by jurisdiction:



	Year Ended December 31
	2011		2010			2009
			(In thousands)
United States	$	260,859	$	166,108		$	171,508
Foreign	18,517		(8,467		)	(34,357		)
	$	279,376	$	157,641		$	137,151

Schedule of Effective Income Tax Rate Reconciliation

The following table sets forth the reconciliation between the federal statutory income tax rate and the effective rate:



	Year Ended December 31
	2011		2010		2009
Federal statutory rate	35.0	%	35.0	%	35.0	%
State taxes, net of federal tax benefit	2.1		1.5		2.5
Nondeductible expenses	0.7		1.3		1.3
Domestic tax benefit from foreign operations	—		(0.3	)	(0.4	)
Foreign tax rate differences	(6.3	)	(8.0	)	(13.7	)
Federal tax credits	(0.1	)	(0.1	)	(0.3	)
Domestic production activity deduction	(0.5	)	(0.5	)	(0.4	)
Adjustment related to uncertain tax positions	(0.7	)	(4.2	)	0.4
Revaluation of deferred tax items	0.4		1.9		(0.6	)
Other	(0.8	)	0.1		(0.4	)
	29.8	%	26.7	%	23.4	%

Schedule of Deferred Tax Assets and Liabilities

The following table sets forth deferred tax assets and liabilities:



	December 31
	2011				2010
			(In thousands)
	Assets		Liabilities		Assets		Liabilities
Accounts receivable	$	4,015	$	—	$	3,586	$	—
Inventory	—		6,515		—		7,163
Depreciation	—		6,064		—		15,754
Amortization of intangible assets	—		162,675		—		143,371
Convertible debt interest	—		93,736		—		84,551
Employee benefits	30,454		—		30,474		—
Tax loss carryforwards	24,232		—		32,692		—
Other	37,529		3,938		11,268		3,722
Total deferred taxes	$	96,230	$	272,928	$	78,020	$	254,561

Summary of Income Tax Examinations

The following summary sets forth the tax years that remain open in the Company’s major tax jurisdictions:



United States — Federal		2000 and forward *
United States — States		2006 and forward
Canada		1998 and forward *

* Open by waiver of statute only.

Summary of Income Tax Contingencies

The following table sets forth the reconciliation of gross unrecognized tax benefits:



	December 31,
	2011				2010			2009
	(In thousands)
Beginning balance January 1	$	3,394			$	8,085		$	7,451
Additions based on tax positions related to the current year	265				1,439			319
Additions for tax positions of prior years⁽¹⁾	20,064				4,668			927
Reductions for tax positions of prior years	(2,161		)		(8,818		)	—
Settlements	(512		)		(1,368		)	(336		)
Lapse in statute of limitations	(172		)		(612		)	(276		)
Ending balance December 31	$	20,878		—	$	3,394		$	8,085

_________________________

⁽¹⁾ Additions for tax positions of prior years primarily relate to transfer pricing issues between the United States and

- Definition

Tabular disclosure of tax positions taken in the tax returns filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of income tax contingencies, including: (1) the policy on classification of interest and penalties; (2) a tabular reconciliation of the total amounts of unrecognized tax benefits at the beginning and end of the period; the total amount(s) of: (3) unrecognized tax benefits that, if recognized, would affect the effective tax rate, and (4) interest and penalties recognized in each of the income statement and balance sheet; (5) for positions for which it is reasonably possible that the total amounts unrecognized will significantly change within 12 months of the reporting date the: (i) nature of the uncertainty, (ii) nature of the event that could occur that would cause the change, and (iii) an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made; and (6) a description of tax years that remain subject to examination by major tax jurisdictions.

+ References + Details

- Definition

Tabular disclosure of income tax examinations that an enterprise is currently subject to or that have been completed in the current period typically including a description of the examination, the jurisdiction conducting the examination, the tax year(s) under examination, the likelihood of an unfavorable settlement, the range of possible losses, the liability recorded, the increase or decrease in the liability from the prior period, and any penalties and interest that have been recorded.

+ References + Details

EARNINGS PER SHARE (Tables)

12 Months Ended

Dec. 31, 2011

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted

The following table sets forth the details of basic and diluted earnings per share:



	Year Ended December 31
	2011		2010		2009
			(In thousands)
Net income	$	196,251	$	115,477	$	105,088
Weighted average common shares outstanding used in computing basic earnings per share	43,220		42,499		42,282
Common shares issuable upon exercise of dilutive stock options	1,179		840		390
Common shares issuable from contingently convertible debentures (see below for basis of calculation)	5,224		2,774		—
Weighted average common shares outstanding and common share equivalents used in computing diluted earnings per share	49,623		46,113		42,672
Earnings per share attributable to WESCO International, Inc.
Basic	$	4.54	$	2.72	$	2.49
Diluted	$	3.96	$	2.50	$	2.46

STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2011

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Share-based Compensation, Stock Options and Stock Appreciation Rights Award Activity

The following table sets forth a summary of both stock options and stock appreciation rights and related information for the years indicated:



	2011							2010				2009
	Awards		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life	Aggregate Intrinsic Value (In thousands)		Awards		Weighted Average Exercise Price		Awards		Weighted Average Exercise Price
Beginning of year	4,498,303		$	36.38				4,226,153		$	35.30	3,933,035		$	36.44
Granted	399,260		59.16					708,949		33.19		815,231		25.37
Exercised	(543,154	)	25.83					(335,155	)	14.79		(253,253	)	12.55
Cancelled	(87,876	)	46.86					(101,644	)	40.62		(268,860	)	43.22
End of year	4,266,533		39.64		6.1	$	63,668	4,498,303		36.38		4,226,153		35.30
Exercisable at end of year	3,176,161		$	39.23	5.3	$	48,986	3,011,120		$	38.65	2,661,320		$	35.61

Schedule of Share-based Compensation, Restricted Stock Units Award Activity

The following table sets forth a summary of restricted stock units and related information for the year ended December 31, 2011:



	Awards		Weighted Average Fair Value
Unvested at December 31, 2010	392,493		$	28.36
Granted	53,852		60.05
Vested	(236,913	)	27.93
Forfeited	(6,141	)	32.02
Unvested at December 31, 2011	203,291		$	37.16

COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2011

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Future minimum rental payments required under operating leases, primarily for real property that have noncancelable lease terms in excess of one year as of December 31, 2011, are as follows:



(In thousands)
2012	$	47,015
2013	32,768
2014	24,470
2015	20,580
2016	16,276
Thereafter	42,498

SEGMENTS AND RELATED INFORMATION (Tables)

12 Months Ended

Dec. 31, 2011

Segment Reporting [Abstract]

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas

WESCO attributes revenues from external customers to individual countries on the basis of the point of sale. The following table sets forth information about WESCO by geographic area:



	Net Sales Year Ended December 31,												Long-Lived Assets December 31,
(In thousands)	2011				2010				2009				2011		2010		2009
United States	$	4,994,641	82	%	$	4,198,420	83	%	$	3,928,182	85	%	$	131,989	$	117,768	$	112,955
Canada	900,551		15	%	682,415		13	%	559,367		12	%	24,609		12,446		12,343
Mexico	84,871		1	%	51,413		1	%	39,032		1	%	572		641		624
Subtotal North American Operations	5,980,063				4,932,248				4,526,581				157,170		130,855		125,922
Other Foreign	145,655		2	%	131,614		3	%	97,373		2	%	771		325		74
Total U.S. and Foreign	$	6,125,718			$	5,063,862			$	4,623,954			$	157,941	$	131,180	$	125,996

Revenue from External Customers by Products and Services

The following table sets forth sales information about WESCO’s sales by product category:



Year Ended December 31,	2011	2010	2009
(percentages based on total sales)
General and Industrial Supplies	34%	35%	35%
Wire, Cable and Conduit	18%	18%	18%
Data and Broadband Communications	17%	15%	14%
Power Distribution Equipment	11%	12%	13%
Lighting and Controls	9%	10%	11%
Control, Automation and Motors	11%	10%	9%

OTHER FINANCIAL INFORMATION (Tables)

12 Months Ended

Dec. 31, 2011

Condensed Financial Information [Abstract]

Condensed Financial Information, Statements of Financial Condition

Condensed consolidating financial information for WESCO International, WESCO Distribution, Inc. and the non-guarantor subsidiaries is as follows:

CONDENSED CONSOLIDATING BALANCE SHEETS



	December 31, 2011
	(In thousands)
	WESCO International, Inc.		WESCO Distribution, Inc.		Non-Guarantor Subsidiaries		Consolidating and Eliminating Entries			Consolidated
Cash and cash equivalents	$	5	$	44,412	$	19,452	$	—		$	63,869
Trade accounts receivable, net	—		—		939,422		—			939,422
Inventories, net	—		341,423		285,544		—			626,967
Other current assets	270		32,548		74,344		—			107,162
Total curent assets	275		418,383		1,318,762		—			1,737,420
Intercompany receivables, net	—		—		1,881,208		(1,881,208		)	—
Property, buildings and equipment, net	—		54,038		79,512		—			133,550
Intangible assets, net	—		6,981		149,893		—			156,874
Goodwill and other intangibles, net	—		246,125		762,002		—			1,008,127
Investments in affiliates and other noncurrent assets	2,219,142		3,412,735		31,745		(5,621,141		)	42,481
Total assets	$	2,219,417	$	4,138,262	$	4,223,122	$	(7,502,349	)	$	3,078,452
Accounts payable	$	—	$	423,509	$	219,268	$	—		$	642,777
Other current liabilities	7,797		6,510		188,762		—			203,069
Total current liabilities	7,797		430,019		408,030		—			845,846
Intercompany payables, net	668,447		1,142,761		—		(1,811,208		)	—
Long-term debt	169,054		188,081		285,787		—			642,922
Other noncurrent liabilities	28,131		163,177		52,466		—			243,774
Stockholders’ equity	1,345,988		2,214,224		3,406,839		(5,621,141		)	1,345,910
Total liabilities and stockholders’ equity	$	2,219,417	$	4,138,262	$	4,153,122	$	(7,432,349	)	$	3,078,452



	December 31, 2010
	(In thousands)
	WESCO International, Inc.			WESCO Distribution, Inc.		Non-Guarantor Subsidiaries			Consolidating and Eliminating Entries			Consolidated
Cash and cash equivalents	$	1		$	32,341	$	21,235		$	—		$	53,577
Trade accounts receivable, net	—			—		792,681			—			792,681
Inventories, net	—			321,111		267,737			—			588,848
Other current assets	(4,492		)	90,105		(7,033		)	—			78,580
Total current assets	(4,491		)	443,557		1,074,620			—			1,513,686
Intercompany receivables, net	—			—		1,933,768			(1,933,768		)	—
Property, buildings and equipment, net	—			41,115		76,930			—			118,045
Intangible assets, net	—			7,817		152,490			—			160,307
Goodwill and other intangibles, net	—			240,313		745,401			—			985,714
Investments in affiliates and other noncurrent assets	2,002,358			3,237,808		39,527			(5,230,671		)	49,022
Total assets	$	1,997,867		$	3,970,610	$	4,022,736		$	(7,164,439	)	$	2,826,774
Accounts payable	$	—		$	349,250	$	188,255		$	—		$	537,505
Other current liabilities	8,016			17,562		145,150			—			170,728
Total current liabilities	8,016			366,812		333,405			—			708,233
Intercompany payables, net	646,607			1,287,161		—			(1,933,768		)	—
Long-term debt	166,573			151,755		407,565			—			725,893
Other noncurrent liabilities	28,077			167,705		48,272			—			244,054
Stockholders’ equity	1,148,594			1,997,177		3,233,494			(5,230,671		)	1,148,594
Total liabilities and stockholders’ equity	$	1,997,867		$	3,970,610	$	4,022,736		$	(7,164,439	)	$	2,826,774

Condensed Financial Information, Statement of Income

CONDENSED CONSOLIDATING STATEMENTS OF INCOME



	Year ended December 31, 2011
	(In thousands)
	WESCO International, Inc.		WESCO Distribution, Inc.		Non-Guarantor Subsidiaries			Consolidating and Eliminating Entries			Consolidated
Net sales	$	—	$	3,230,753	$	2,998,639		$	(103,674	)	$	6,125,718
Cost of goods sold	—		2,585,978		2,406,845			(103,674		)	4,889,149
Selling, general and administrative expenses	70		546,902		325,011			—			871,983
Depreciation and amortization	—		11,996		19,611			—			31,607
Results of affiliates’ operations	229,621		173,421		—			(403,042		)	—
Interest expense, net	23,990		16,520		13,093			—			53,603
Other income	—		—		—			—			—
Provision for income taxes	9,321		13,157		60,658			—			83,136
Net income (loss)	196,240		229,621		173,421			(403,042		)	196,240
Less: Net loss attributable to noncontrolling interest	—		—		(11		)	—			(11		)
Net income (loss) attributable to WESCO International, Inc.	$	196,240	$	229,621	$	173,432		$	(403,042	)	$	196,251



	Year ended December 31, 2010
	(In thousands)
	WESCO International, Inc.		WESCO Distribution, Inc.			Non-Guarantor Subsidiaries		Consolidating and Eliminating Entries			Consolidated
Net sales	$	—	$	2,820,855		$	2,318,495	$	(75,488	)	$	5,063,862
Cost of goods sold	—		2,262,038			1,878,875		(75,488		)	4,065,425
Selling, general and administrative expenses	234		518,100			245,249		—			763,583
Depreciation and amortization	—		12,581			11,354		—			23,935
Results of affiliates’ operations	153,107		126,711			—		(279,818		)	—
Interest expense, net	27,565		16,816			13,182		—			57,563
Other income	—		(4,285		)	—		—			(4,285		)
Provision for income taxes	9,831		(10,791		)	43,124		—			42,164
Net income (loss) attributable to WESCO International, Inc.	$	115,477	$	153,107		$	126,711	$	(279,818	)	$	115,477

CONDENSED CONSOLIDATING STATEMENTS OF INCOME (continued)



	Year ended December 31, 2009
	(In thousands)
	WESCO International, Inc.			WESCO Distribution, Inc.			Non-Guarantor Subsidiaries		Consolidating and Eliminating Entries			Consolidated
Net sales	$	—		$	3,049,745		$	1,574,209	$	—		$	4,623,954
Cost of goods sold	—			2,470,956			1,253,105		—			3,724,061
Selling, general and administrative expenses	39			503,831			190,026		—			693,896
Depreciation and amortization	—			19,736			6,309		—			26,045
Results of affiliates’ operations	136,606			99,375			—		(235,981		)	—
Interest expense, net	28,014			16,106			9,634		—			53,754
Gain on debt exchange	(5,962		)	—			—		—			(5,962		)
Other income	—			(4,991		)	—		—			(4,991		)
Provision for income taxes	9,427			6,876			15,760		—			32,063
Net income (loss) attributable to WESCO International, Inc.	$	105,088		$	136,606		$	99,375	$	(235,981	)	$	105,088

Condensed Financial Information, Statements of Cash Flows

CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS



	Year ended December 31, 2011
	(In thousands)
	WESCO International, Inc.			WESCO Distribution, Inc.			Non-Guarantor Subsidiaries			Consolidating and Eliminating Entries		Consolidated
Net cash (used) provided by operating activities	$	(19,823	)	$	181,348		$	6,008		$	—	$	167,533
Investing activities:
Capital expenditures	—			(30,546		)	(2,801		)	—		(33,347		)
Acquisition payments	—			(48,093		)	—			—		(48,093		)
Other	—			97			—			—		97
Net cash used in investing activities	—			(78,542		)	(2,801		)	—		(81,343		)
Financing activities:
Net borrowings (repayments)	21,840			(105,931		)	—			—		(84,091		)
Equity transactions	(2,013		)	—			—			—		(2,013		)
Other	—			15,196			—			—		15,196
Net cash provided (used) by financing activities	19,827			(90,735		)	—			—		(70,908		)
Effect of exchange rate changes on cash and cash equivalents	—			—			(4,990		)	—		(4,990		)
Net change in cash and cash equivalents	4			12,071			(1,783		)	—		10,292
Cash and cash equivalents at the beginning of year	1			32,341			21,235			—		53,577
Cash and cash equivalents at the end of period	$	5		$	44,412		$	19,452		$	—	$	63,869



	Year ended December 31, 2010
	(In thousands)
	WESCO International, Inc.			WESCO Distribution, Inc.			Non-Guarantor Subsidiaries			Consolidating and Eliminating Entries		Consolidated
Net cash (used) provided by operating activities	$	(96,685	)	$	301,578		$	(77,610	)	$	—	$	127,283
Investing activities:
Capital expenditures	—			(14,702		)	(430		)	—		(15,132		)
Acquisition payments	—			(265,397		)	—			—		(265,397		)
Sale of subsidiary	—			40,000			—			—		40,000
Other	—			19,986			—			—		19,986
Net cash used in investing activities	—			(220,113		)	(430		)	—		(220,543		)
Financing activities:
Net borrowings (repayments)	92,350			(58,894		)	—			—		33,456
Equity transactions	4,333			—			—			—		4,333
Other	—			(7,154		)	—			—		(7,154		)
Net cash provided (used) by financing activities	96,683			(66,048		)	—			—		30,635
Effect of exchange rate changes on cash and cash equivalents	—			—			3,873			—		3,873
Net change in cash and cash equivalents	(2		)	15,417			(74,167		)	—		(58,752		)
Cash and cash equivalents at the beginning of year	3			16,924			95,402			—		112,329
Cash and cash equivalents at the end of period	$	1		$	32,341		$	21,235		$	—	$	53,577

CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS (continued)



	Year ended December 31, 2009
	(In thousands)
	WESCO International, Inc.			WESCO Distribution, Inc.			Non-Guarantor Subsidiaries			Consolidating and Eliminating Entries		Consolidated
Net cash (used) provided by operating activities	$	(61,795	)	$	335,097		$	18,362		$	—	$	291,664
Investing activities:
Capital expenditures	—			(12,161		)	(809		)	—		(12,970		)
Acquisition payments	—			(262		)	—			—		(262		)
Other	—			2,540			—			—		2,540
Net cash used in investing activities	—			(9,883		)	(809		)	—		(10,692		)
Financing activities:
Net borrowings (repayments)	59,235			(314,817		)	—			—		(255,582		)
Equity transactions	2,563			—			—			—		2,563
Other	—			(11,926		)	—			—		(11,926		)
Net cash provided (used) by financing activities	61,798			(326,743		)	—			—		(264,945		)
Effect of exchange rate changes on cash and cash equivalents	—			—			9,964			—		9,964
Net change in cash and cash equivalents	3			(1,529		)	27,517			—		25,991
Cash and cash equivalents at the beginning of year	—			18,453			67,885			—		86,338
Cash and cash equivalents at the end of period	$	3		$	16,924		$	95,402		$	—	$	112,329

SELECTED QUARTERLY FINANCIAL DATA (Tables)

12 Months Ended

Dec. 31, 2011

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

The following table sets forth selected quarterly financial data for the years ended December 31, 2011 and 2010:



	First Quarter		Second Quarter		Third Quarter		Fourth Quarter
2011
Net Sales	$	1,431,305	$	1,524,515	$	1,580,376	$	1,589,522
Cost of goods sold	1,145,255		1,217,666		1,264,745		1,261,483
Income from operations	64,745		84,996		91,752		91,486
Income before income taxes	52,104		71,065		76,673		79,534
Net income	37,305		50,207		53,890		54,838
Net income attributable to WESCO International, Inc.	37,305		50,207		53,890		54,849
Basic earnings per share attributable to WESCO International, Inc.^(A)	0.87		1.16		1.24		1.27
Diluted earnings per share attributable to WESCO International, Inc.^(B)	0.74		1.00		1.11		1.12

2010
Net Sales	$	1,148,599	$	1,259,121	$	1,324,555	$	1,331,587
Cost of goods sold	921,183		1,016,169		1,066,769		1,061,304
Income from operations	38,276		51,355		61,246		60,042
Income before income taxes	27,252		38,733		47,498		44,158
Net income	19,200		27,793		33,661		34,823
Net income attributable to WESCO International, Inc.	19,200		27,793		33,661		34,823
Basic earnings per share attributable to WESCO International, Inc.^(A)	0.45		0.65		0.79		0.82
Diluted earnings per share attributable to WESCO International, Inc.^(B)	0.44		0.60		0.74		0.72

_________________________


^(A)	Earnings per share (EPS) in each quarter is computed using the weighted average number of shares outstanding during the quarter while EPS for the full year is computed by taking the average of the weighted average number of shares outstanding each quarter. Thus, the sum of the four quarters’ EPS may not equal the full-year EPS.


^(B)	Diluted earnings per share (DEPS) in each quarter is computed using the weighted average number of shares outstanding during that quarter while DEPS for the full year is computed by taking the average of the weighted average number of shares outstanding each quarter. Thus, the sum of the four quarters’ DEPS may not equal the full-year DEPS.

Schedule II - Valuation and Qualifying Accounts (Tables)

12 Months Ended

Dec. 31, 2011

Valuation and Qualifying Accounts [Abstract]

Allowance for Doubtful Accounts



	Col. A		Col. B		Col. C		Col. D			Col. E
	(In thousands)
	Balance at Beginning		Charged to		Charged to Other					Balance at
(In thousands)	of Period		Expense		Accounts		Deductions⁽¹⁾			End of Period
Allowance for doubtful accounts
Year ended December 31, 2011	$	18,562	$	6,583	$	—	$	(3,555	)	$	21,590
Year ended December 31, 2010	20,060		6,439		—		(7,937		)	18,562
Year ended December 31, 2009	19,665		6,072		2,059		(7,736		)	20,060

_________________________


⁽¹⁾	Includes a reduction in the allowance for doubtful accounts due to write-off of accounts receivable.

ORGANIZATION (Details) - 12 months ended Dec. 31, 2011	branches customers	countries	distribution_centers	Total
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Customers (in customers) \| customers	65,000
Full service branches (in branches)	400			400
Distribution centers (in distribution centers)			8	8
Additional countries (in countries) \| countries		11

ACCOUNTING POLICIES - GENERAL (Details) $ in Thousands	12 Months Ended
ACCOUNTING POLICIES - GENERAL (Details) $ in Thousands	Dec. 31, 2011 USD ($) yr branches	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)	Dec. 31, 2011 distribution_centers	Dec. 31, 2011	Dec. 31, 2011 USD ($)
Accounting Policies [Abstract]
Sales Revenue, Services, Net	$ 10,800	$ 11,100	$ 10,000
Supplier Volume Rebate Receivables		31,000				$ 38,500
Supplier Volume Rebate Range Low	0.80%
Supplier Volume Rebate Range High	1.20%
Supplier Volume Rebate Rate	1.20%
Shipping, Handling and Transportation Costs	$ 50,900	42,400	49,200
Allowance for Doubtful Accounts Receivable, Current		18,562				21,590
Provision for Doubtful Accounts	6,600	6,400	6,100
Inventory Valuation Reserves		20,500				14,600
Inventory Write-down	5,500	7,500	7,800
General and Administrative Costs in Inventory, Amount Incurred		43,800				47,600
Increase in deferred charges	$ 4,700
Deferred Finance Costs, Net		12,600				12,900
Full service branches (in branches)	400				400
Distribution centers (in distribution centers)				8	8
Goodwill and Indefinite Lived Intangible Assets		1,031,400				1,055,000
Trademarks Subject to a Decline in Performance						18,100
Finite-Lived Intangible Assets, Useful Life, Minimum (in years) \| yr	4
Finite-Lived Intangible Assets, Useful Life, Maximum (in years) \| yr	19
Accrued Insurance		11,400				9,700
Stock-based compensation expense	$ 15,407	15,752	$ 13,324
Debt Instrument, Fair Value Disclosure		1,269,700				1,178,900
Fixed Rate Debt, Fair Value Disclosures		$ 860,200				$ 850,900

ACCOUNTING POLICIES - PPE (Details) $ in Thousands	12 Months Ended
ACCOUNTING POLICIES - PPE (Details) $ in Thousands	Dec. 31, 2011 USD ($) yr	Dec. 31, 2010 USD ($)
Property, Plant and Equipment [Line Items]
Property, buildings and equipment, net \| $	$ 133,550	$ 118,045
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Minimum	5
Property, Plant and Equipment, Useful Life, Maximum	40
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Minimum	3
Property, Plant and Equipment, Useful Life, Maximum	10
Software [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life, Minimum	3
Property, Plant and Equipment, Useful Life, Maximum	5
Land, Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment, net \| $	$ 72,900
Computer Equipment and Software [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment, net \| $	$ 27,800

ACCOUNTING POLICIES - SCHEDULE OF SHARE-BASED PAYMENT AWARDS, VALUATION ASSUMPTIONS (Details)	12 Months Ended
	Dec. 31, 2011 yr shares	Dec. 31, 2010 yr shares	Dec. 31, 2009 yr shares
Weighted Average Assumptions for Fair Value Calculation of Share-based Payment Awards [Line Items]
Risk free interest rate	2.30%	1.80%	2.30%
Expected life (in years) \| yr	5.0	5.0	4.5
Expected volatility	49.00%	49.00%	51.00%
Stock Appreciation Rights (SARs) [Member]
Weighted Average Assumptions for Fair Value Calculation of Share-based Payment Awards [Line Items]
Granted	399,260	708,949	815,231
Restricted Stock Units (RSUs) [Member]
Weighted Average Assumptions for Fair Value Calculation of Share-based Payment Awards [Line Items]
Granted	53,852	153,318	245,997

ACCOUNTING POLICIES - STOCK-BASED COMPENSATION (Details) - $ / shares	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 26.46	$ 14.71	$ 11.15
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$ 60.05	$ 33.05	$ 25.37

GOODWILL AND INTANGIBLE ASSETS - TEXTUALS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Amortization Expense	$ 13.4	$ 7.5	$ 7.3

GOODWILL AND INTANGIBLE ASSETS - SCHEDULE OF GOODWILL (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Goodwill [Roll Forward]
Beginning balance January 1	$ 985,714	$ 863,410
Translation adjustments and payments to goodwill for prior acquisitions	(4,734)	2,467
Additions to goodwill for acquisitions	27,147	119,837
Ending balance December 31	$ 1,008,127	$ 985,714

- Definition

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 43
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph l
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6905597&loc=d3e13816-109267

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 72
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 142
-Paragraph 45
-Subparagraph e
-Clause 1
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 34
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

GOODWILL AND INTANGIBLE ASSETS - SCHEDULE OF INTANGIBLE ASSETS BY MAJOR CLASS (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2011 USD ($) yr	Dec. 31, 2010 USD ($)
Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Accumulated Amortization	$ (45,501)	$ (31,993)
Intangible Assets Gross Excluding Goodwill	202,375	192,300
Intangible Assets, Net (Excluding Goodwill)	$ 156,874	160,307
Finite-Lived Intangible Assets, Useful Life, Maximum (in years) \| yr	19
Finite-Lived Intangible Assets, Useful Life, Minimum (in years) \| yr	4
Non-compete agreements
Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,252	1,252
Finite-Lived Intangible Assets, Accumulated Amortization	(1,038)	(895)
Finite-Lived Intangible Assets, Net	$ 214	357
Finite-Lived Intangible Assets, Useful Life, Maximum (in years) \| yr	7
Finite-Lived Intangible Assets, Useful Life, Minimum (in years) \| yr	5
Customer Relationships [Member]
Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 70,670	65,967
Finite-Lived Intangible Assets, Accumulated Amortization	(32,527)	(25,933)
Finite-Lived Intangible Assets, Net	$ 38,143	40,034
Finite-Lived Intangible Assets, Useful Life, Maximum (in years) \| yr	19
Finite-Lived Intangible Assets, Useful Life, Minimum (in years) \| yr	4
Distribution agreements
Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 35,291	31,084
Finite-Lived Intangible Assets, Accumulated Amortization	(6,897)	(4,950)
Finite-Lived Intangible Assets, Net	$ 28,394	26,134
Finite-Lived Intangible Assets, Useful Life, Maximum (in years) \| yr	19
Finite-Lived Intangible Assets, Useful Life, Minimum (in years) \| yr	10
Patents
Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 48,310	48,310
Finite-Lived Intangible Assets, Accumulated Amortization	(5,039)	(215)
Finite-Lived Intangible Assets, Net	$ 43,271	48,095
Finite-Lived Intangible Assets, Weighted-Average Useful Life (in years) \| yr	10
Trademarks [Member]
Intangible Assets [Line Items]
Indefinite-lived Intangible Assets	$ 46,852	$ 45,687

GOODWILL AND INTANGIBLE ASSETS - SCHEDULE OF EXPECTED AMORTIZATION EXPENSE (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2011 USD ($)
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]
2012	$ 12,002
2013	11,831
2014	11,262
2015	11,262
2016	$ 11,262

CONCENTRATIONS OF CREDIT RISK AND SIGNIFICANT SUPPLIERS (Details)	Dec. 31, 2011	Dec. 31, 2010
Supplier Concentration Risk [Member] \| Cost of Goods, Total [Member]
Concentration Risk [Line Items]
Concentration Risk, Percentage	10.00%	12.00%

ACQUISITIONS - ACQUISITIONS (Details) $ in Thousands	2 Months Ended	3 Months Ended								6 Months Ended	9 Months Ended	12 Months Ended
ACQUISITIONS - ACQUISITIONS (Details) $ in Thousands	Mar. 14, 2011 USD ($)	Dec. 31, 2011 USD ($)	Sep. 30, 2011 USD ($)	Jun. 30, 2011 USD ($)	Mar. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Sep. 30, 2010 USD ($)	Jun. 30, 2010 USD ($)	Mar. 31, 2010 USD ($)	Jun. 30, 2010 USD ($)	Oct. 03, 2011 USD ($)	Dec. 31, 2011 USD ($) yr	Dec. 31, 2010 USD ($)	Dec. 16, 2010 USD ($)	Dec. 31, 2009 USD ($)
Business Acquisition [Line Items]
Net loss attributable to noncontrolling interest												$ (11)	$ 0		$ 0
Business Acquisition, Cost of Acquired Entity, Purchase Price		$ 48,093				$ 265,397						48,093	265,397
Cash and cash equivalents		0				1,475						0	1,475
Net sales		$ 1,589,522	$ 1,580,376	$ 1,524,515	$ 1,431,305	$ 1,331,587	$ 1,324,555	$ 1,259,121	$ 1,148,599			6,125,718	5,063,862		$ 4,623,954
RECO, LLC [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition	3/14/2011
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period												25,000
Business Acquisition, Purchase Price Allocation, Goodwill Amount	$ 6,000
Brews Supply, Ltd [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition											10/3/2011
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period												$ 50,000
Business Acquisition, Purchase Price Allocation, Goodwill Amount											$ 19,800
Business Acquisition, Purchase Price Allocation, Intangible assets											10,200
Noncontrolling Interest, Ownership Percentage by Parent		49.00%										49.00%
Net loss attributable to noncontrolling interest												$ 100
TVC Communications, LLC [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition														12/16/2010
Business Acquisition, Purchase Price Allocation, Goodwill Amount														$ 109,183
Business Acquisition, Purchase Price Allocation, Intangible assets														86,442
Business Acquisition, Cost of Acquired Entity, Purchase Price														251,000
Cash and cash equivalents														1,475
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred														20,000
Net sales													6,900
Potelcom Supply, Inc [Member]
Business Acquisition [Line Items]
Business Acquisition, Effective Date of Acquisition										6/30/2010
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period													$ 25,000
Business Acquisition, Purchase Price Allocation, Goodwill Amount								$ 10,700		$ 10,700
Customer Relationships [Member] \| Brews Supply, Ltd [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets											4,800
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life \| yr												10
Customer Relationships [Member] \| TVC Communications, LLC [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets														20,600
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life \| yr												10
Supplier Relationships [Member] \| Brews Supply, Ltd [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets											4,200
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life \| yr												10
Supplier Relationships [Member] \| TVC Communications, LLC [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets														9,700
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life \| yr												15
Patented Technology [Member] \| TVC Communications, LLC [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets														48,300
Acquired Finite-lived Intangible Asset, Weighted Average Useful Life \| yr												10
Trademarks [Member] \| Brews Supply, Ltd [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Intangible Assets Not Amortizable											$ 1,200
Trademarks [Member] \| TVC Communications, LLC [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Intangible Assets Not Amortizable														$ 7,800

ACQUISITIONS - SCHEDULE OF BUSINESS ACQUISTIONS (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Details of acquisitions:
Fair value of assets acquired	$ 54,663	$ 297,849
Fair value of liabilities assumed	(6,570)	(31,162)
Deferred acquisition payments	0	185
Cash paid for acquisitions	48,093	266,872
Supplemental cash flow disclosure related to acquisitions:
Less: cash acquired	0	(1,475)
Cash paid for acquisitions, net of cash acquired	$ 48,093	$ 265,397

- Definition

Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141
-Paragraph 51
-Subparagraph f
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph g(1)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 29, 30, 41, 42, 64
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 65
-Subparagraph a, b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 30
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=6910544&loc=d3e4237-128469

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 25
-Paragraph 27
-URI http://asc.fasb.org/extlink&oid=6946367&loc=d3e3629-128468

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 35
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=6910684&loc=d3e4570-128470

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(3),(c)(1)
-URI http://asc.fasb.org/extlink&oid=6911361&loc=d3e6927-128479

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 30
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=6910544&loc=d3e4243-128469

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6411-128476

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 25
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6946367&loc=d3e3642-128468

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 40
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6910732&loc=d3e4805-128471

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476

+ Details

ACQUISITIONS - SCHEDULE OF PURCHASE PRICE ALLOCATION (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Dec. 16, 2010
Assets Acquired
Cash and cash equivalents	$ 0	$ 1,475
Total assets acquired	54,663	297,849
Liabilities Assumed
Total liabilities assumed	$ 6,570	$ 31,162
TVC Communications, LLC [Member]
Assets Acquired
Cash and cash equivalents			$ 1,475
Trade accounts receivable			38,744
Other accounts receivable			978
Inventories			41,313
Prepaid expenses and other current assets			1,377
Property, buildings and equipment			2,268
Business Acquisition, Purchase Price Allocation, Intangible assets			86,442
Business Acquisition, Purchase Price Allocation, Goodwill Amount			109,183
Other noncurrent assets			158
Total assets acquired			281,938
Liabilities Assumed
Accounts payable			24,249
Accrued payroll and benefit costs			1,183
Other current liabilities			4,019
Total liabilities assumed			29,451
Fair value of net assets acquired, including intangible assets			$ 252,487

ACQUISITIONS - BUSINESS ACQUISITION, PRO FORMA INFORMATION (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2009
Business Combination, Pro Forma Information [Abstract]
Net Sales	$ 5,315,929	$ 4,907,441
Net Income	$ 132,455	$ 121,306
Earnings per common share:
Basic	$ 3.12	$ 2.87
Diluted	$ 2.87	$ 2.84

- Definition

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References + Details

- Definition

The pro forma diluted net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References + Details

PROPERTY, BUILDINGS AND EQUIPMENT - SCHEDULE OF PROPERTY, BUILDINGS AND EQUIPMENT (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Property, Plant and Equipment [Line Items]
Accumulated depreciation and amortization	$ (190,385)	$ (215,768)
Property, buildings and equipment, net	133,550	118,045
Building and Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment, gross	96,527	92,862
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment, gross	152,164	140,427
Software [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment, gross	44,909	77,335
Depreciable Assets [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment, gross	293,600	310,624
Property, buildings and equipment, net	103,215	94,856
Land [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment, gross	21,097	21,169
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, buildings and equipment, gross	$ 9,238	$ 2,020

PROPERTY, BUILDINGS AND EQUIPMENT - PROPERTY, BUILDINGS AND EQUIPMENT (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Property, Plant and Equipment [Abstract]
Depreciation	$ 12.5	$ 11.7	$ 13.7
Capitalized Computer Software, Amortization	5.7	4.7	$ 5.0
Capitalized Computer Software, Net	19.7	18.0
Capital Leased Assets, Gross	9.6	9.2
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation	$ (4.7)	$ (4.0)

DEBT - SCHEDULE OF DEBT (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Aug. 27, 2009
Debt Instrument [Line Items]
Long-term Debt	$ 649,333
Total debt	649,333	$ 729,881
Less current portion	(6,411)	(3,988)
Total long-term debt	642,922	725,893
Debt Instrument, Unamortized Discount	175,908	178,427
Mortgages [Member]
Debt Instrument [Line Items]
Long-term Debt	37,564	39,239
Accounts Receivable Securitization Facility [Member]
Debt Instrument [Line Items]
Long-term Debt	250,000	370,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term Debt	36,792	0
2017 Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Long-term Debt	150,000	150,000
Convertible Senior Debentures Due in 2026 [Member]
Debt Instrument [Line Items]
Long-term Debt	56	214
Debt Instrument, Unamortized Discount	0	7
Convertible Senior Debentures Due in 2029 [Member]
Debt Instrument [Line Items]
Long-term Debt	169,054	166,580
Debt Instrument, Unamortized Discount	175,908	178,420	$ (181,200)
Acquisition Related Notes [Member]
Debt Instrument [Line Items]
Long-term Debt	85	204
Capital Lease Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt	2,521	3,167
Other Debt Obligations [Member]
Debt Instrument [Line Items]
Long-term Debt	$ 3,261	$ 477

DEBT - DEBT (Details)		1 Months Ended				8 Months Ended	12 Months Ended						48 Months Ended
DEBT - DEBT (Details)	Jan. 03, 2012 USD ($)	Aug. 31, 2009 USD ($)	Jan. 31, 2009	Nov. 30, 2006 USD ($)	Sep. 30, 2005 USD ($)	Aug. 27, 2009 USD ($)	Oct. 14, 2013	Oct. 14, 2012	Dec. 31, 2011 USD ($) shares $ / shares	Dec. 31, 2010 USD ($)	Dec. 23, 2010 USD ($) shares	Dec. 31, 2009 USD ($)	Oct. 14, 2017	Dec. 31, 2003 USD ($)
Debt Instrument [Line Items]
Long-term Debt									$ 649,333,000
Interest Expense									53,603,000	$ 57,563,000		$ 53,754,000
Gain on Debt Exchange									0	0		5,962,000
Debt discount on convertible debentures									(175,908,000)	(178,427,000)
2012									12,002,000
2013									11,831,000
2014									11,262,000
2015									11,262,000
2016									$ 11,262,000
Common Stock, Par or Stated Value Per Share \| $ / shares									$ 0.01
Mortgages [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity														$ 51,000,000
Line of Credit Facility, Amount Outstanding									$ 37,600,000
Long-term Debt									$ 37,564,000	$ 39,239,000
Debt Instrument, Interest Rate, Stated Percentage									6.50%
Accounts Receivable Securitization Facility [Member]
Debt Instrument [Line Items]
Increase to Purchase Commitments									$ 100,000,000
Debt Instrument, Basis Spread on Variable Rate									1.10%	1.75%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage									0.55%	0.75%
Accounts Receivable Securitization Facility, Maximum Borrowing Capacity									$ 450,000,000
Accounts Receivable Eligible for Securitization									613,900,000	$ 537,000,000
Accounts Receivable from Securitization									$ 250,000,000	370,000,000
Debt Instrument, Interest Rate at Period End									1.64%
Long-term Debt									$ 250,000,000	370,000,000
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity									400,000,000
Increase to Purchase Commitments									$ 100,000,000
Reduction in Interest Rate Margin									0.25%
Debt Instrument, Interest Rate at Period End									3.00%
Average Daily Excess Availability									$ 125,000,000
Debt Instrument, Increase, Additional Borrowings									435,700,000	636,000,000
Debt Instrument, Decrease, Repayments									398,900,000	832,500,000
Long-term Debt									36,792,000	0
Line of Credit Facility, Remaining Borrowing Capacity									299,300,000	276,700,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity									80,000,000
2017 Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Long-term Debt									$ 150,000,000	150,000,000
Debt Instrument, Interest Rate, Stated Percentage									7.50%
Redemption Price, Percentage of Principal Amount							101.25%	102.50%					100.00%
Debt Instrument, Repurchase Price									101.00%
Convertible Senior Debentures Due in 2029 [Member]
Debt Instrument [Line Items]
Long-term Debt									$ 169,054,000	166,580,000
Debt Instrument, Interest Rate, Stated Percentage									6.00%
Redemption Price, Percentage of Principal Amount									100.00%
Debt Instrument, Face Amount						$ 345,000,000
Debt Instrument, Convertible, Effective Interest Rate						13.875%
Interest Expense									$ 2,500,000	2,100,000
Gain on Debt Exchange		$ 6,000,000
Debt discount on convertible debentures						$ 181,200,000			(175,908,000)	(178,420,000)
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt						106,500,000
2012									2,800,000
2013									3,100,000
2014									3,600,000
2015									4,100,000
2016									$ 4,600,000
Percent of Principal Amount Contigent on Additional Interest Payment									120.00%
Contingent Interest Payable Percentage of Average Trading Price									0.25%
Debt Instrument, Convertible, Conversion Ratio \| shares									34.6433
Debt Instrument, Convertible, Conversion Price \| $ / shares									$ 28.87
Convertible Senior Debentures Due in 2026 [Member]
Debt Instrument [Line Items]
Long-term Debt									$ 56,000	214,000
Debt Instrument, Interest Rate, Stated Percentage									1.75%
Redemption Price, Percentage of Principal Amount	100.00%
Proceeds from Issuance of Debt				$ 300,000,000
Debt Instrument, Face Amount	$ 100,000					299,700,000
Debt Instrument, Convertible, Effective Interest Rate			6.00%
Interest Expense									$ 100,000	100,000		7,100,000
Debt discount on convertible debentures									$ 0	(7,000)
Convertible Senior Debentures Due In 2025 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage									2.625%
Redemption Price, Percentage of Principal Amount											100.00%
Proceeds from Issuance of Debt					$ 150,000,000
Debt Instrument, Face Amount						$ 57,700,000					$ 2,500,000
Debt Conversion, Converted Instrument, Amount											$ 89,800,000
Debt Conversion, Converted Instrument, Shares Issued \| shares											340,213
Debt Instrument, Convertible, Effective Interest Rate			6.00%
Interest Expense									$ 0	$ 2,100,000		$ 4,000,000
Canada [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity									$ 175,000,000
Minimum [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Leverage Ratio									1.0
Minimum [Member] \| LIBOR [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate									1.50%
Minimum [Member] \| Alternative Rate [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate									0.50%
Maximum [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Leverage Ratio									2.5
Maximum [Member] \| LIBOR [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate									2.00%
Maximum [Member] \| Alternative Rate [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate									1.00%

DEBT - OUTSTANDING CONVERTIBLE DEBENTURE SCHEDULE (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Aug. 27, 2009
Debt Instrument [Line Items]
Principal Balance	$ 825,241
Debt Instrument, Unamortized Discount	(175,908)	$ (178,427)
Total long-term debt	649,333
Convertible Senior Debenture Due in 2026 [Member]
Debt Instrument [Line Items]
Principal Balance	56	221
Debt Instrument, Unamortized Discount	0	(7)
Total long-term debt	56	214
Convertible Senior Debentures Due in 2029 [Member]
Debt Instrument [Line Items]
Principal Balance	344,962	345,000
Debt Instrument, Unamortized Discount	(175,908)	(178,420)	$ 181,200
Total long-term debt	169,054	166,580
Convertible Debt [Member]
Debt Instrument [Line Items]
Principal Balance	345,018	345,221
Debt Instrument, Unamortized Discount	(175,908)	(178,427)
Total long-term debt	$ 169,110	$ 166,794

DEBT - SCHEDULE OF MATURITIES OF LONG-TERM DEBT (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Debt Disclosure [Abstract]
2012	$ 6,411
2013	36,594
2014	250,328
2015	133
2016	36,813
Thereafter	494,962
Total payments on debt	825,241
Debt discount on convertible debentures	(175,908)	$ (178,427)
Total long-term debt	$ 649,333

CAPITAL STOCK (Details) - USD ($) $ / shares in Units, $ in Millions	Dec. 31, 2011	Dec. 31, 2010
Class of Stock [Line Items]
Preferred Stock, Shares Authorized	20,000,000	20,000,000
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Par or Stated Value Per Share	$ 0.01
Debt Instrument, Convertible, Carrying Amount of Equity Component	$ 106.4	$ 106.5
Common Stock [Member]
Class of Stock [Line Items]
Common Stock, Shares Authorized	210,000,000	210,000,000
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Class B
Class of Stock [Line Items]
Common Stock, Shares Authorized	20,000,000	20,000,000
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01

EQUITY INVESTMENT (Details) - Deutsch Engineered Connecting Devices, Inc. [Member] - USD ($) $ in Millions	3 Months Ended	5 Months Ended
	Mar. 31, 2010	Jun. 07, 2010	Apr. 30, 2010	Jan. 15, 2010	Mar. 31, 2008
Schedule of Equity Method Investments [Line Items]
Equity Investment, Percentage Not Owned					60.00%
Equity Method Investment, Ownership Percentage		40.00%	40.00%	40.00%	40.00%
Equity Investment, Total Consideration Received					$ 75.0
Equity Investment, Cash Received		$ 40.0			60.0
Equity Investment, Note Receivable		15.0			$ 15.0
Amended Promissory Note Agreement, Effective Date				Jan. 15, 2010
Interest Receivable		0.5		$ 1.8
Notification of Sale of Joint Venture, Effective Date			Apr. 30, 2010
Selling Price of Equity Investment	$ 40.0
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	43.4
Gain (Loss) on Sale of Equity Investments	$ 3.4	$ 0.4
Sale of Joint Venture, Effective Date		Jun. 07, 2010
Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Selling Price of Equity Investment			$ 40.0
Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Selling Price of Equity Investment			$ 50.0
Notes Receivable [Member]
Schedule of Equity Method Investments [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				8.50%

INCOME TAXES - ADDITIONAL INFORMATION (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Income Tax Disclosure [Abstract]
Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation	$ 5,600	$ 8,200	$ 59,700
Undistributed Earnings of Foreign Subsidiaries	246,800
Deferred Tax Asset, Tranfser Pricing	23,100
Unrecognized Tax Benefits	20,878	3,394	8,085	$ 7,451
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	19,700	1,900	$ 7,100
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	17,300
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 11,400	$ 9,500

INCOME TAXES - SCHEDULE OF COMPONENTS OF INCOME TAX EXPENSE (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Current taxes
Federal	$ 60,415	$ 11,363	$ 30,136
State	5,705	2,018	2,355
Foreign	2,643	7,801	7,531
Total current	68,763	21,182	40,022
Deferred taxes
Federal	9,692	21,069	5,351
State	2,187	1,112	1,841
Foreign	2,494	(1,199)	(15,151)
Total deferred	14,373	20,982	(7,959)
Income tax expense	$ 83,136	$ 42,164	$ 32,063

INCOME TAXES - SCHEDULE OF INCOME BEFORE INCOME TAX, DOMESTIC AND FOREIGN (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Tax Disclosure [Abstract]
United States									$ 260,859	$ 166,108	$ 171,508
Foreign									18,517	(8,467)	(34,357)
Income before income taxes	$ 79,534	$ 76,673	$ 71,065	$ 52,104	$ 44,158	$ 47,498	$ 38,733	$ 27,252	$ 279,376	$ 157,641	$ 137,151

INCOME TAXES - SCHEDULE OF EFFECTIVE INCOME TAX RATE RECONCILIATION (Details)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
State taxes, net of federal tax benefit	2.10%	1.50%	2.50%
Nondeductible expenses	0.70%	1.30%	1.30%
Domestic tax benefit from foreign operations	0.00%	(0.30%)	(0.40%)
Foreign tax rate differences	(6.30%)	(8.00%)	(13.70%)
Federal tax credits	(0.10%)	(0.10%)	(0.30%)
Domestic production activity deduction	(0.50%)	(0.50%)	(0.40%)
Adjustment related to uncertain tax positions	(0.70%)	(4.20%)	0.40%
Revaluation of deferred tax items	0.40%	1.90%	(0.60%)
Other	(0.80%)	0.10%	(0.40%)
Effective income tax rate	29.80%	26.70%	23.40%

INCOME TAXES - SCHEDULE OF DEFERRED TAX ASSETS AND LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010
Deferred Tax Assets, Net [Abstract]
Accounts receivable	$ 4,015	$ 3,586
Employee benefits	30,454	30,474
Tax loss carryforwards	24,232	32,692
Other	37,529	11,268
Deferred taxes, Assets	96,230	78,020
Deferred Tax Liabilities [Abstract]
Inventory	6,515	7,163
Depreciation	6,064	15,754
Amortization of intangible assets	162,675	143,371
Convertible debt interest	93,736	84,551
Other	3,938	3,722
Deferred taxes, Liabilities	$ 272,928	$ 254,561

INCOME TAXES - NOLS (Details) - USD ($) $ in Millions	Dec. 31, 2011	Dec. 31, 2010
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 6.3	$ 6.9
Operating Loss Carryforwards, Net of Federal Income Tax	4.1	4.5
Foreign Country [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	$ 20.2	$ 27.1

INCOME TAXES - SCHEDULE OF INCOME TAX CONTINGENCIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance January 1	$ 3,394	$ 8,085	$ 7,451
Additions based on tax positions related to the current year	265	1,439	319
Additions for tax positions of prior years	20,064	4,668	927
Reductions for tax positions of prior years	(2,161)	(8,818)	0
Settlements	(512)	(1,368)	(336)
Lapse in statute of limitations	(172)	(612)	(276)
Ending balance December 31	$ 20,878	$ 3,394	$ 8,085

EARNINGS PER SHARE - SCHEDULE OF EARNINGS PER SHARE, BASIC AND DILUTED (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Earnings Per Share [Abstract]
Net Income	$ 54,849	$ 53,890	$ 50,207	$ 37,305	$ 34,823	$ 33,661	$ 27,793	$ 19,200	$ 196,251	$ 115,477	$ 105,088
Weighted average common shares outstanding used in computing basic earnings per share									43,220	42,499	42,282
Common shares issuable upon exercise of dilutive stock options									1,179	840	390
Common shares issuable from contingently convertible debentures									5,224	2,774	0
Weighted average common shares outstanding and common share equivalents used in computing diluted earnings per share									49,623	46,113	42,672
Earnings Per Share attributable to WESCO International, Inc.
Basic	$ 1.27	$ 1.24	$ 1.16	$ 0.87	$ 0.82	$ 0.79	$ 0.65	$ 0.45	$ 4.54	$ 2.72	$ 2.49
Diluted	$ 1.12	$ 1.11	$ 1.00	$ 0.74	$ 0.72	$ 0.74	$ 0.60	$ 0.44	$ 3.96	$ 2.50	$ 2.46

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 36, 37, 38
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 03
-Paragraph 20

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Article 7
-Paragraph 18

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 21
-Article 9

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.21)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1252-109256

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 55
-Paragraph 52
-URI http://asc.fasb.org/extlink&oid=6945512&loc=d3e4984-109258

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.23)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.19)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 87-21
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 130
-Paragraph 10, 15
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28, 29, 30
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 5
-Section 03
-Paragraph 19

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph 20
-Article 9

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Net Income
-URI http://asc.fasb.org/extlink&oid=6518256

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Other Comprehensive Income
-URI http://asc.fasb.org/extlink&oid=6519514

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 11: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.18)
-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 12: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.19)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6920043&loc=d3e565-108580

Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04.22)
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 15: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph d
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 16: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A7
-Appendix A

+ Details

- Definition

The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

+ References + Details

- Definition

Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 171
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 40
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 128
-Paragraph 8
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1448-109256

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Weighted-Average Number of Common Shares Outstanding
-URI http://asc.fasb.org/extlink&oid=6528421

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Emerging Issues Task Force (EITF)
-Number 07-4
-Paragraph 4
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

EARNINGS PER SHARE - EARNINGS PER SHARE (Details) - $ / shares	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Effect of Dilutive Securities on Earnings Per Share	$ 0.47	$ 0.16
Convertible Debt Securities [Member] \| Convertible Senior Debentures Due in 2029 [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Debt Instrument, Convertible, Conversion Price	$ 28.87
Earnings Per Share Dilution Limit	11,950,622
Convertible Debt Securities [Member] \| Convertible Senior Debenture Due in 2026 [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Debt Instrument, Convertible, Conversion Price	$ 88.15
Earnings Per Share Dilution Limit	635
Stock Appreciation Rights (SARs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share	1,200,000	2,400,000	3,600,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Weighted Average Exercise Price	$ 62.48	$ 46.73	$ 39.65

EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Millions	12 Months Ended
EMPLOYEE BENEFIT PLANS (Details) - USD ($) $ in Millions	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Schedule of Employee Benefit Plans [Line Items]
Defined contribution plan, employer discretionary contribution amount	$ 16.2	$ 14.2
Defined contribution plan, cost recognized	$ 27.6	$ 25.3	$ 8.3
United States [Member]
Schedule of Employee Benefit Plans [Line Items]
Defined contribution plan, employer matching contribution, percent	50.00%
Defined contribution plan, maximum annual contribution per employee, percent	6.00%
Minimum [Member] \| Canada [Member]
Schedule of Employee Benefit Plans [Line Items]
Defined contribution plan, maximum annual contribution per employee, percent	1.00%
Maximum [Member] \| Canada [Member]
Schedule of Employee Benefit Plans [Line Items]
Defined contribution plan, maximum annual contribution per employee, percent	7.00%

STOCK-BASED COMPENSATION - STOCK-BASED COMPENSATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2003
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized				6,936,000
Common Stock, Capital Shares Reserved for Future Issuance				2,700,000
Stock Options Involved In Private Negotiation Transaction						2,900,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized				$ 16.7
Employee Service, Share-based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized In Subsequent Fiscal Year			$ 10.0
Employee Service, Share-based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized In Two Years		$ 6.1
Employee Service, Share-based Compensation, Nonvested Awards, Total Compensation Cost Not Yet Recognized In Three Years	$ 0.6
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value				13.8	$ 9.9
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options				0.4	1.8
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense				$ 5.4	$ 3.1

STOCK-BASED COMPENSATION - SCHEDULE OF SHARE-BASED COMPENSATION, STOCK OPTIONS AND STOCK APPRECIATION RIGHTS AWARD ACTIVITY (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2011 USD ($) yr $ / shares shares	Dec. 31, 2010 $ / shares shares	Dec. 31, 2009 $ / shares shares
Share Based Compensation Arrangements By Share Based Payment Award, Options and Stock Appreciation Rights Outstanding [Roll Forward]
Beginning of Year, Shares \| shares	4,498,303	4,226,153	3,933,035
Grants in Period, Shares \| shares	399,260	708,949	815,231
Exercises in Period, Shares \| shares	(543,154)	(335,155)	(253,253)
Forfeitures in Period, Shares \| shares	(87,876)	(101,644)	(268,860)
Exercisable, Shares \| shares	3,176,161	3,011,120	2,661,320
End of Year, Shares \| shares	4,266,533	4,498,303	4,226,153
Weighted Average Exercise Price, Beginning of Year \| $ / shares	$ 36.38	$ 35.30	$ 36.44
Weighted Average Exercise Price, Grants In Period \| $ / shares	59.16	33.19	25.37
Weighted Average Exercise Price, Exercises In Period \| $ / shares	25.83	14.79	12.55
Weighted Average Exercise Price, Forfeitures In Period \| $ / shares	46.86	40.62	43.22
Weighted Average Exercise Price, Exercisable \| $ / shares	39.23	38.65	35.61
Weighted Average Exercise Price, End of Year \| $ / shares	$ 39.64	$ 36.38	$ 35.30
Weighted Average Remaining Contractual Term, Exercisable \| yr	5.3
Weighted Average Remaining Contractual Term, Outstanding \| yr	6.1
Aggregate Intrinsic Value, Outstanding \| $	$ 63,668
Aggregate Intrinsic Value, Exercisable \| $	$ 48,986

STOCK-BASED COMPENSATION - SUMMARY OF RESTRICTED STOCK UNITS (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Unvested, Shares	203,291	392,493
Granted	53,852	153,318	245,997
Vested in Period	(236,913)
Forfeited in Period	(6,141)
Unvested, Weighted Average Fair Value	$ 37.16	$ 28.36
Granted, Weighted Average Fair Value	60.05	$ 33.05	$ 25.37
Vested in Period, Weighted Average Fair Value	27.93
Forfeited in Period, Weighted Average Fair Value	$ 32.02

COMMITMENTS AND CONTINGENCIES - COMMITMENTS AND CONTINGENCIES (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Commitments and Contingencies Disclosure [Abstract]
Operating Leases, Rent Expense	$ 48.0	$ 45.4	$ 46.3
Loss Contingency, Damages Sought, Value	$ 50.0

- Definition

The value (monetary amount) of the award the plaintiff seeks in the legal matter.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 9
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 11
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 10
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14326-108349

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14557-108349

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 5
-Paragraph 12
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

COMMITMENTS AND CONTINGENCIES - SCHEDULE OF FUTURE MINIMUM RENTAL PAYMENTS (Details) $ in Thousands	Dec. 31, 2011 USD ($)
Operating Leases, Future Minimum Payments Due [Abstract]
2012	$ 47,015
2013	32,768
2014	24,470
2015	20,580
2016	16,276
Thereafter	$ 42,498

SEGMENTS AND RELATED INFORMATION - SEGMENTS AND RELATED INFORMATION (Details)	Dec. 31, 2011 products stockkeepingunits
Segment Reporting [Abstract]
Product stock keeping units (in stock keeping units) \| stockkeepingunits	250,000
Products (in products) \| products	1,000,000

SEGMENTS AND RELATED INFORMATION - SCHEDULE OF REVENUE FROM EXTERNAL CUSTOMERS AND LONG LIVED ASSETS, BY GEOGRAPHICAL AREAS (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 1,589,522	$ 1,580,376	$ 1,524,515	$ 1,431,305	$ 1,331,587	$ 1,324,555	$ 1,259,121	$ 1,148,599	$ 6,125,718	$ 5,063,862	$ 4,623,954
Long-Lived Assets	157,941				131,180				157,941	131,180	125,996
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									$ 4,994,641	$ 4,198,420	$ 3,928,182
Sales Revenue, Net, Percentage									82.00%	83.00%	85.00%
Long-Lived Assets	131,989				117,768				$ 131,989	$ 117,768	$ 112,955
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									$ 900,551	$ 682,415	$ 559,367
Sales Revenue, Net, Percentage									15.00%	13.00%	12.00%
Long-Lived Assets	24,609				12,446				$ 24,609	$ 12,446	$ 12,343
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									$ 84,871	$ 51,413	$ 39,032
Sales Revenue, Net, Percentage									1.00%	1.00%	1.00%
Long-Lived Assets	572				641				$ 572	$ 641	$ 624
North American Operations
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									5,980,063	4,932,248	4,526,581
Long-Lived Assets	157,170				130,855				157,170	130,855	125,922
Other Foreign
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									$ 145,655	$ 131,614	$ 97,373
Sales Revenue, Net, Percentage									2.00%	3.00%	2.00%
Long-Lived Assets	$ 771				$ 325				$ 771	$ 325	$ 74

SEGMENTS AND RELATED INFORMATION - SCHEDULE OF REVENUE FROM EXTERNAL CUSTOMERS BY PRODUCT AND SERVICES (Details)	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
General and Industrial Supplies
Product Information [Line Items]
Sales Revenue, Goods, Net, Percentage	34.00%	35.00%	35.00%
Wire, Cable and Conduit
Product Information [Line Items]
Sales Revenue, Goods, Net, Percentage	18.00%	18.00%	18.00%
Data Communications
Product Information [Line Items]
Sales Revenue, Goods, Net, Percentage	17.00%	15.00%	14.00%
Power Distribution Equipment
Product Information [Line Items]
Sales Revenue, Goods, Net, Percentage	11.00%	12.00%	13.00%
Lighting and Controls
Product Information [Line Items]
Sales Revenue, Goods, Net, Percentage	9.00%	10.00%	11.00%
Control, Automation and Motors
Product Information [Line Items]
Sales Revenue, Goods, Net, Percentage	11.00%	10.00%	9.00%

OTHER FINANCIAL INFORMATION - OTHER FINANCIAL INFORMATION (Details) $ in Millions	Dec. 31, 2011 USD ($)
2017 Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 150.0
Convertible Senior Debentures Due in 2026 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	0.1
Convertible Senior Debentures Due in 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount	$ 345.0

OTHER FINANCIAL INFORMATION - CONDENSED CONSOLIDATED BALANCE SHEETS (Details) - USD ($) $ in Thousands	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Condensed Financial Information [Line Items]
Cash and cash equivalents	$ 63,869	$ 53,577	$ 112,329	$ 86,338
Trade accounts receivable	939,422	792,681
Inventories, net	626,967	588,848
Other current assets	107,162	78,580
Total current assets	1,737,420	1,513,686
Intercompany receivables, net	0	0
Property, building and equipment, net	133,550	118,045
Intangible assets, net	156,874	160,307
Goodwill and other intangibles, net	1,008,127	985,714	863,410
Investments in affiliates and other noncurrent assets	42,481	49,022
Total assets	3,078,452	2,826,774
Accounts payable	642,777	537,505
Other current liabilities	203,069	170,728
Total current liabilities	845,846	708,233
Intercompany payables, net	0	0
Long-term debt	642,922	725,893
Other noncurrent liabilities	243,774	244,054
Stockholders’ equity	1,345,910	1,148,594
Total liabilities and stockholders' equity	3,078,452	2,826,774
Parent Company [Member]
Condensed Financial Information [Line Items]
Cash and cash equivalents	5	1	3	0
Trade accounts receivable	0	0
Inventories, net	0	0
Other current assets	270	(4,492)
Total current assets	275	(4,491)
Intercompany receivables, net	0	0
Property, building and equipment, net	0	0
Intangible assets, net	0	0
Goodwill and other intangibles, net	0	0
Investments in affiliates and other noncurrent assets	2,219,142	2,002,358
Total assets	2,219,417	1,997,867
Accounts payable	0	0
Other current liabilities	7,797	8,016
Total current liabilities	7,797	8,016
Intercompany payables, net	668,447	646,607
Long-term debt	169,054	166,573
Other noncurrent liabilities	28,131	28,077
Stockholders’ equity	1,345,988	1,148,594
Total liabilities and stockholders' equity	2,219,417	1,997,867
Guarantor Subsidiaries [Member]
Condensed Financial Information [Line Items]
Cash and cash equivalents	44,412	32,341	16,924	18,453
Trade accounts receivable	0	0
Inventories, net	341,423	321,111
Other current assets	32,548	90,105
Total current assets	418,383	443,557
Intercompany receivables, net	0	0
Property, building and equipment, net	54,038	41,115
Intangible assets, net	6,981	7,817
Goodwill and other intangibles, net	246,125	240,313
Investments in affiliates and other noncurrent assets	3,412,735	3,237,808
Total assets	4,138,262	3,970,610
Accounts payable	423,509	349,250
Other current liabilities	6,510	17,562
Total current liabilities	430,019	366,812
Intercompany payables, net	1,142,761	1,287,161
Long-term debt	188,081	151,755
Other noncurrent liabilities	163,177	167,705
Stockholders’ equity	2,214,224	1,997,177
Total liabilities and stockholders' equity	4,138,262	3,970,610
Non-Guarantor Subsidiaries [Member]
Condensed Financial Information [Line Items]
Cash and cash equivalents	19,452	21,235	95,402	67,885
Trade accounts receivable	939,422	792,681
Inventories, net	285,544	267,737
Other current assets	74,344	(7,033)
Total current assets	1,318,762	1,074,620
Intercompany receivables, net	1,881,208	1,933,768
Property, building and equipment, net	79,512	76,930
Intangible assets, net	149,893	152,490
Goodwill and other intangibles, net	762,002	745,401
Investments in affiliates and other noncurrent assets	31,745	39,527
Total assets	4,223,122	4,022,736
Accounts payable	219,268	188,255
Other current liabilities	188,762	145,150
Total current liabilities	408,030	333,405
Intercompany payables, net	0	0
Long-term debt	285,787	407,565
Other noncurrent liabilities	52,466	48,272
Stockholders’ equity	3,406,839	3,233,494
Total liabilities and stockholders' equity	4,153,122	4,022,736
Consolidation, Eliminations [Member]
Condensed Financial Information [Line Items]
Cash and cash equivalents	0	0	$ 0	$ 0
Trade accounts receivable	0	0
Inventories, net	0	0
Other current assets	0	0
Total current assets	0	0
Intercompany receivables, net	(1,881,208)	(1,933,768)
Property, building and equipment, net	0	0
Intangible assets, net	0	0
Goodwill and other intangibles, net	0	0
Investments in affiliates and other noncurrent assets	(5,621,141)	(5,230,671)
Total assets	(7,502,349)	(7,164,439)
Accounts payable	0	0
Other current liabilities	0	0
Total current liabilities	0	0
Intercompany payables, net	(1,811,208)	(1,933,768)
Long-term debt	0	0
Other noncurrent liabilities	0	0
Stockholders’ equity	(5,621,141)	(5,230,671)
Total liabilities and stockholders' equity	$ (7,432,349)	$ (7,164,439)

OTHER FINANCIAL INFORMATION - CONDENSED CONSOLIDATED INCOME STATEMENT (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Condensed Financial Information [Line Items]
Net sales	$ 1,589,522	$ 1,580,376	$ 1,524,515	$ 1,431,305	$ 1,331,587	$ 1,324,555	$ 1,259,121	$ 1,148,599	$ 6,125,718	$ 5,063,862	$ 4,623,954
Cost of goods sold	1,261,483	1,264,745	1,217,666	1,145,255	1,061,304	1,066,769	1,016,169	921,183	4,889,149	4,065,425	3,724,061
Selling, general and administrative expense									871,983	763,583	693,896
Depreciation and amortization									31,607	23,935	26,045
Results of affiliates' operations									0	0	0
Interest Expense, net									53,603	57,563	53,754
Gain on debt exchange									0	0	(5,962)
Other income									0	(4,285)	(4,991)
Provision for income taxes									83,136	42,164	32,063
Net income (loss)	54,838	53,890	50,207	37,305	34,823	33,661	27,793	19,200	196,240	115,477	105,088
Net loss attributable to noncontrolling interest									(11)	0	0
Net Income attributable to WESCO International, Inc.	$ 54,849	$ 53,890	$ 50,207	$ 37,305	$ 34,823	$ 33,661	$ 27,793	$ 19,200	196,251	115,477	105,088
Parent Company [Member]
Condensed Financial Information [Line Items]
Net sales									0	0	0
Cost of goods sold									0	0	0
Selling, general and administrative expense									70	234	39
Depreciation and amortization									0	0	0
Results of affiliates' operations									229,621	153,107	136,606
Interest Expense, net									23,990	27,565	28,014
Gain on debt exchange											(5,962)
Other income									0	0	0
Provision for income taxes									9,321	9,831	9,427
Net income (loss)									196,240
Net loss attributable to noncontrolling interest									0
Net Income attributable to WESCO International, Inc.									196,240	115,477	105,088
Guarantor Subsidiaries [Member]
Condensed Financial Information [Line Items]
Net sales									3,230,753	2,820,855	3,049,745
Cost of goods sold									2,585,978	2,262,038	2,470,956
Selling, general and administrative expense									546,902	518,100	503,831
Depreciation and amortization									11,996	12,581	19,736
Results of affiliates' operations									173,421	126,711	99,375
Interest Expense, net									16,520	16,816	16,106
Gain on debt exchange											0
Other income									0	(4,285)	(4,991)
Provision for income taxes									13,157	(10,791)	6,876
Net income (loss)									229,621
Net loss attributable to noncontrolling interest									0
Net Income attributable to WESCO International, Inc.									229,621	153,107	136,606
Non-Guarantor Subsidiaries [Member]
Condensed Financial Information [Line Items]
Net sales									2,998,639	2,318,495	1,574,209
Cost of goods sold									2,406,845	1,878,875	1,253,105
Selling, general and administrative expense									325,011	245,249	190,026
Depreciation and amortization									19,611	11,354	6,309
Results of affiliates' operations									0	0	0
Interest Expense, net									13,093	13,182	9,634
Gain on debt exchange											0
Other income									0	0	0
Provision for income taxes									60,658	43,124	15,760
Net income (loss)									173,421
Net loss attributable to noncontrolling interest									(11)
Net Income attributable to WESCO International, Inc.									173,432	126,711	99,375
Consolidation, Eliminations [Member]
Condensed Financial Information [Line Items]
Net sales									(103,674)	(75,488)	0
Cost of goods sold									(103,674)	(75,488)	0
Selling, general and administrative expense									0	0	0
Depreciation and amortization									0	0	0
Results of affiliates' operations									(403,042)	(279,818)	(235,981)
Interest Expense, net									0	0	0
Gain on debt exchange											0
Other income									0	0	0
Provision for income taxes									0	0	0
Net income (loss)									(403,042)
Net loss attributable to noncontrolling interest									0
Net Income attributable to WESCO International, Inc.									$ (403,042)	$ (279,818)	$ (235,981)

OTHER FINANCIAL INFORMATION - CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Condensed Financial Information [Line Items]
Net cash (used) provided by operating activities	$ 167,533	$ 127,283	$ 291,664
Investing Activities:
Capital expenditures	(33,347)	(15,132)	(12,970)
Acquisition payments	(48,093)	(265,397)	(262)
Sale of subsidiary	0	40,000	0
Other	97	19,986	2,540
Net cash used in investing activities	(81,343)	(220,543)	(10,692)
Financing Activities:
Net borrowings (repayments)	(84,091)	33,456	(255,582)
Equity transactions	(2,013)	4,333	2,563
Other	15,196	(7,154)	(11,926)
Net cash provided (used) by financing activities	(70,908)	30,635	(264,945)
Effect of exchange rate changes on cash and cash equivalents	(4,990)	3,873	9,964
Net change in cash and cash equivalents	10,292	(58,752)	25,991
Cash and cash equivalents at the beginning of period	53,577	112,329	86,338
Cash and cash equivalents at the end of period	63,869	53,577	112,329
Parent Company [Member]
Condensed Financial Information [Line Items]
Net cash (used) provided by operating activities	(19,823)	(96,685)	(61,795)
Investing Activities:
Capital expenditures	0	0	0
Acquisition payments	0	0	0
Sale of subsidiary		0
Other	0	0	0
Net cash used in investing activities	0	0	0
Financing Activities:
Net borrowings (repayments)	21,840	92,350	59,235
Equity transactions	(2,013)	4,333	2,563
Other	0	0	0
Net cash provided (used) by financing activities	19,827	96,683	61,798
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Net change in cash and cash equivalents	4	(2)	3
Cash and cash equivalents at the beginning of period	1	3	0
Cash and cash equivalents at the end of period	5	1	3
Guarantor Subsidiaries [Member]
Condensed Financial Information [Line Items]
Net cash (used) provided by operating activities	181,348	301,578	335,097
Investing Activities:
Capital expenditures	(30,546)	(14,702)	(12,161)
Acquisition payments	(48,093)	(265,397)	(262)
Sale of subsidiary		40,000
Other	97	19,986	2,540
Net cash used in investing activities	(78,542)	(220,113)	(9,883)
Financing Activities:
Net borrowings (repayments)	(105,931)	(58,894)	(314,817)
Equity transactions	0	0	0
Other	15,196	(7,154)	(11,926)
Net cash provided (used) by financing activities	(90,735)	(66,048)	(326,743)
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Net change in cash and cash equivalents	12,071	15,417	(1,529)
Cash and cash equivalents at the beginning of period	32,341	16,924	18,453
Cash and cash equivalents at the end of period	44,412	32,341	16,924
Non-Guarantor Subsidiaries [Member]
Condensed Financial Information [Line Items]
Net cash (used) provided by operating activities	6,008	(77,610)	18,362
Investing Activities:
Capital expenditures	(2,801)	(430)	(809)
Acquisition payments	0	0	0
Sale of subsidiary		0
Other	0	0	0
Net cash used in investing activities	(2,801)	(430)	(809)
Financing Activities:
Net borrowings (repayments)	0	0	0
Equity transactions	0	0	0
Other	0	0	0
Net cash provided (used) by financing activities	0	0	0
Effect of exchange rate changes on cash and cash equivalents	(4,990)	3,873	9,964
Net change in cash and cash equivalents	(1,783)	(74,167)	27,517
Cash and cash equivalents at the beginning of period	21,235	95,402	67,885
Cash and cash equivalents at the end of period	19,452	21,235	95,402
Consolidation, Eliminations [Member]
Condensed Financial Information [Line Items]
Net cash (used) provided by operating activities	0	0	0
Investing Activities:
Capital expenditures	0	0	0
Acquisition payments	0	0	0
Sale of subsidiary		0
Other	0	0	0
Net cash used in investing activities	0	0	0
Financing Activities:
Net borrowings (repayments)	0	0	0
Equity transactions	0	0	0
Other	0	0	0
Net cash provided (used) by financing activities	0	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Net change in cash and cash equivalents	0	0	0
Cash and cash equivalents at the beginning of period	0	0	0
Cash and cash equivalents at the end of period	$ 0	$ 0	$ 0

SELECTED QUARTERLY FINANCIAL DATA (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 1,589,522	$ 1,580,376	$ 1,524,515	$ 1,431,305	$ 1,331,587	$ 1,324,555	$ 1,259,121	$ 1,148,599	$ 6,125,718	$ 5,063,862	$ 4,623,954
Cost of goods sold	1,261,483	1,264,745	1,217,666	1,145,255	1,061,304	1,066,769	1,016,169	921,183	4,889,149	4,065,425	3,724,061
Income from operations	91,486	91,752	84,996	64,745	60,042	61,246	51,355	38,276	332,979	210,919	179,952
Income before income taxes	79,534	76,673	71,065	52,104	44,158	47,498	38,733	27,252	279,376	157,641	137,151
Net income	54,838	53,890	50,207	37,305	34,823	33,661	27,793	19,200	196,240	115,477	105,088
Net Income attributable to WESCO International, Inc.	$ 54,849	$ 53,890	$ 50,207	$ 37,305	$ 34,823	$ 33,661	$ 27,793	$ 19,200	$ 196,251	$ 115,477	$ 105,088
Basic earnings per share attributable to WESCO International, Inc.	$ 1.27	$ 1.24	$ 1.16	$ 0.87	$ 0.82	$ 0.79	$ 0.65	$ 0.45	$ 4.54	$ 2.72	$ 2.49
Diluted earnings per share attributable to WESCO International, Inc.	$ 1.12	$ 1.11	$ 1.00	$ 0.74	$ 0.72	$ 0.74	$ 0.60	$ 0.44	$ 3.96	$ 2.50	$ 2.46

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

+ Details

- Definition

+ References + Details

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

- Definition

The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 29
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph a
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph A1, A4, A5
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 5
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4K
-URI http://asc.fasb.org/extlink&oid=6922042&loc=SL4591552-111686

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 45
-Paragraph 19
-URI http://asc.fasb.org/extlink&oid=6921628&loc=SL4569616-111683

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4J
-URI http://asc.fasb.org/extlink&oid=6922042&loc=SL4591551-111686

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=6921930&loc=SL4573702-111684

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 51
-Paragraph 38
-Subparagraph c(1)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

SUBSEQUENT EVENT (Details) - Acquisition [Member] - RS Electronics [Member] $ in Millions		12 Months Ended
	Jan. 03, 2012 branches	Dec. 31, 2011 USD ($)
Subsequent Event [Line Items]
Business Acquisition, Effective Date of Acquisition	1/3/2012
Full Service Branches Acquired (in branches) \| branches	8
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period \| $		$ 60

- Definition

Month, date and year in which the acquirer obtains control of the acquiree.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 3
-Subparagraph c
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 10, 11
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 141R
-Paragraph 68
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=6909708&loc=d3e848-128460

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6972119&loc=d3e1392-128463

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=6909708&loc=d3e845-128460

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Acquisition Date
-URI http://asc.fasb.org/extlink&oid=6919109

+ Details

Schedule II - Valuation and Qualifying Accounts (Details) - Allowance for Doubtful Accounts [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowances and Reserves, Balance	$ 21,590	$ 18,562	$ 20,060	$ 19,665
Valuation Allowances and Reserves, Charged to Cost and Expense	6,583	6,439	6,072
Valuation Allowances and Reserves, Charged to Other Accounts	0	0	2,059
Valuation Allowances and Reserves, Deductions	$ (3,555)	$ (7,937)	$ (7,736)