10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2022

or

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                     to                     

Commission File Number: 001-14989

WESCO International, Inc.

(Exact name of registrant as specified in its charter)

Delaware		25-1723342
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)
225 West Station Square Drive Suite 700		15219
Pittsburgh,	Pennsylvania	(Zip Code)
(Address of principal executive offices)

(412) 454-2200

(Registrant's telephone number, including area code)

Not applicable.

(Former name, former address and former fiscal year, if changed since last report)

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT:

Title of Class	Trading Symbol(s)	Name of Exchange on which registered
Common Stock, par value $.01 per share	WCC	New York Stock Exchange
Depositary Shares, each representing a 1/1,000th interest in a share of Series A Fixed-Rate Reset Cumulative Perpetual Preferred Stock	WCC PR A	New York Stock Exchange

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for at least the past 90 days.              Yes ☑ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes ☑ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☑	Accelerated filer	☐
Non-accelerated filer	☐	Smaller reporting company	☐
		Emerging growth company	☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☑

As of November 3, 2022, 50,843,668 shares of common stock, $0.01 par value, of the registrant were outstanding.

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

QUARTERLY REPORT ON FORM 10-Q

Table of Contents

	Page
PART I—FINANCIAL INFORMATION
Item 1. Financial Statements.	2
Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations.	24
Item 3. Quantitative and Qualitative Disclosures About Market Risk.	43
Item 4. Controls and Procedures.	43
PART II—OTHER INFORMATION
Item 1. Legal Proceedings.	44
Item 1A. Risk Factors.	44
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.	44
Item 6. Exhibits.	44
Signatures	46

1

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

PART I—FINANCIAL INFORMATION

Item 1. Financial Statements.

The interim financial information required by this item is set forth in the unaudited Condensed Consolidated Financial Statements and Notes thereto in this Quarterly Report on Form 10-Q, as follows:

	Page
Condensed Consolidated Balance Sheets (unaudited)	3
Condensed Consolidated Statements of Income and Comprehensive Income (unaudited)	4
Condensed Consolidated Statements of Cash Flows (unaudited)	5
Condensed Consolidated Statements of Stockholders' Equity (unaudited)	6
Notes to Condensed Consolidated Financial Statements (unaudited)	8

2

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(In thousands, except share data)

(unaudited)

	As of
Assets	September 30, 2022		December 31, 2021
Current assets:
Cash and cash equivalents	$	234,083	$	212,583
Trade accounts receivable, net of allowance for expected credit losses of $46,663 and $41,723 in 2022 and 2021, respectively	3,622,067		2,957,613
Other accounts receivable	388,748		375,885
Inventories	3,490,121		2,666,219
Prepaid expenses and other current assets	162,068		137,811
Total current assets	7,897,087		6,350,111
Property, buildings and equipment, net of accumulated depreciation of $406,960 and $365,345 in 2022 and 2021, respectively	372,083		379,012
Operating lease assets	575,159		530,863
Intangible assets, net	1,853,451		1,944,141
Goodwill	3,123,430		3,208,333
Other assets	259,354		205,239
Total assets	$	14,080,564	$	12,617,699
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable	$	2,578,741	$	2,140,251
Accrued payroll and benefit costs	239,309		314,962
Short-term debt and current portion of long-term debt	69,295		9,528
Other current liabilities	680,227		585,067
Total current liabilities	3,567,572		3,049,808
Long-term debt, net of debt discount and debt issuance costs of $60,765 and $70,572 in 2022 and 2021, respectively	5,192,816		4,701,542
Operating lease liabilities	455,356		414,248
Deferred income taxes	443,245		437,444
Other noncurrent liabilities	229,629		238,446
Total liabilities	$	9,888,618	$	8,841,488
Commitments and contingencies (Note 10)
Stockholders’ equity:
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding	—		—
Preferred stock, Series A, $.01 par value; 25,000 shares authorized, 21,612 shares issued and outstanding in 2022 and 2021	—		—
Common stock, $.01 par value; 210,000,000 shares authorized, 68,523,468 and 68,162,297 shares issued, and 50,836,855 and 50,474,806 shares outstanding in 2022 and 2021, respectively	685		682
Class B nonvoting convertible common stock, $.01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2022 and 2021, respectively	43		43
Additional capital	1,993,709		1,969,332
Retained earnings	3,590,688		3,004,690
Treasury stock, at cost; 22,026,044 and 22,026,922 shares in 2022 and 2021, respectively	(957,805)		(956,188)
Accumulated other comprehensive loss	(430,500)		(236,035)
Total WESCO International, Inc. stockholders' equity	4,196,820		3,782,524
Noncontrolling interests	(4,874)		(6,313)
Total stockholders’ equity	4,191,946		3,776,211
Total liabilities and stockholders’ equity	$	14,080,564	$	12,617,699

The accompanying notes are an integral part of the condensed consolidated financial statements.

3

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME

(In thousands, except per share data)

(unaudited)

	Three Months Ended				Nine Months Ended
	September 30				September 30
	2022		2021		2022		2021
Net sales	$	5,445,916	$	4,728,325	$	15,861,622	$	13,365,592
Cost of goods sold (excluding depreciation and amortization)	4,241,401		3,720,332		12,418,561		10,581,406
Selling, general and administrative expenses	760,200		721,795		2,251,162		2,057,952
Depreciation and amortization	42,723		56,732		135,569		144,645
Income from operations	401,592		229,466		1,056,330		581,589
Interest expense, net	75,057		69,720		207,155		207,683
Other expense (income), net	688		(5,320)		3,007		(8,929)
Income before income taxes	325,847		165,066		846,168		382,835
Provision for income taxes	85,637		44,870		203,178		84,201
Net income	240,210		120,196		642,990		298,634
Less: Net income attributable to noncontrolling interests	608		600		1,439		665
Net income attributable to WESCO International, Inc.	239,602		119,596		641,551		297,969
Less: Preferred stock dividends	14,352		14,352		43,056		43,056
Net income attributable to common stockholders	$	225,250	$	105,244	$	598,495	$	254,913
Other comprehensive income:
Foreign currency translation adjustments and other	(146,732)		(50,277)		(194,465)		(12,217)
Comprehensive income attributable to common stockholders	$	78,518	$	54,967	$	404,030	$	242,696
Earnings per share attributable to common stockholders
Basic	$	4.43	$	2.09	$	11.80	$	5.07
Diluted	$	4.30	$	2.02	$	11.42	$	4.91

The accompanying notes are an integral part of the condensed consolidated financial statements.

4

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(In thousands)

(unaudited)

	Nine Months Ended
	September 30
	2022		2021
Operating activities:
Net income	$	642,990	$	298,634
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Depreciation and amortization	135,569		144,645
Stock-based compensation expense	34,446		22,784
Amortization of debt discount and debt issuance costs	11,610		15,290
Gain on divestitures, net	—		(8,927)
Other operating activities, net	4,237		8,604
Deferred income taxes	7,246		(5,340)
Changes in assets and liabilities:
Trade accounts receivable, net	(737,639)		(521,491)
Other accounts receivable	(15,097)		(84,326)
Inventories	(886,328)		(428,405)
Other current and noncurrent assets	(101,476)		19,299
Accounts payable	479,645		550,858
Accrued payroll and benefit costs	(88,420)		65,136
Other current and noncurrent liabilities	102,596		95,909
Net cash (used in) provided by operating activities	(410,621)		172,670
Investing activities:
Capital expenditures	(59,366)		(25,170)
Proceeds from divestitures	—		56,010
Other investing activities, net	2,159		5,766
Net cash (used in) provided by investing activities	(57,207)		36,606
Financing activities:
Proceeds (repayments) of short-term debt, net	1,324		(10,288)
Repayment of 5.375% Senior Notes due 2021	—		(500,000)
Repayment of 5.375% Senior Notes due 2024	—		(354,704)
Proceeds from issuance of long-term debt	3,140,953		2,470,306
Repayments of long-term debt	(2,592,996)		(1,935,655)
Payments for taxes related to net-share settlement of equity awards	(24,963)		(20,784)
Payment of dividends	(43,056)		(43,056)
Debt issuance costs	(2,333)		(1,849)
Other financing activities, net	(1,678)		(14,174)
Net cash provided by (used in) financing activities	477,251		(410,204)
Effect of exchange rate changes on cash and cash equivalents	12,077		3,592
Net change in cash and cash equivalents	21,500		(197,336)
Cash and cash equivalents at the beginning of period	212,583		449,135
Cash and cash equivalents at the end of period	$	234,083	$	251,799
Supplemental disclosures:
Cash paid for interest	$	140,668	$	141,594
Cash paid for income taxes	$	219,826	$	53,759
Right-of-use assets obtained in exchange for new operating lease liabilities	$	170,498	$	120,384

The accompanying notes are an integral part of the condensed consolidated financial statements.

5

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(In thousands, except shares)

(unaudited)

				Class B			Series A					Retained							Accumulated Other Comprehensive Income (Loss)
	Common Stock			Common Stock			Preferred Stock			Additional		Earnings		Treasury Stock			Noncontrolling
	Amount		Shares	Amount		Shares	Amount		Shares	Capital		(Deficit)		Amount		Shares	Interests
Balance, December 31, 2021	$	682	68,162,297	$	43	4,339,431	$	—	21,612	$	1,969,332	$	3,004,690	$	(956,188)	(22,026,922)	$	(6,313)	$	(236,035)
Exercise of stock-based awards	4		365,833							(10)				(587)		(858)
Stock-based compensation expense										8,911
Tax withholding related to vesting of restricted stock units and retirement of common stock	(2)		(129,869)							(7,832)		(8,136)
Noncontrolling interests																	388
Net income attributable to WESCO International, Inc.												181,243
Preferred stock dividends												(14,352)
Translation adjustments and other																			31,640
Balance, March 31, 2022	$	684	68,398,261	$	43	4,339,431	$	—	21,612	$	1,970,401	$	3,163,445	$	(956,775)	(22,027,780)	$	(5,925)	$	(204,395)
Exercise of stock-based awards	—		11,648											(311)		(2,301)
Stock-based compensation expense										15,823
Tax withholding related to vesting of restricted stock units and retirement of common stock	—		(908)									(40)
Noncontrolling interests																	443
Net income attributable to WESCO International, Inc.												220,706
Preferred stock dividends												(14,352)
Translation adjustments and other	10									(257)		1,177		3					(79,373)
Balance, June 30, 2022	$	694	68,409,001	$	43	4,339,431	$	—	21,612	$	1,985,967	$	3,370,936	$	(957,083)	(22,030,081)	$	(5,482)	$	(283,768)
Exercise of stock-based awards	2		174,996							38				(722)		4,037
Stock-based compensation expense										9,712
Tax withholding related to vesting of restricted stock units and retirement of common stock	(1)		(60,529)							(2,023)		(4,411)
Noncontrolling interests																	608
Net income attributable to WESCO International, Inc.												239,602
Preferred stock dividends												(14,352)
Translation adjustments and other	(10)									15		(1,087)							(146,732)
Balance, September 30, 2022	$	685	68,523,468	$	43	4,339,431	$	—	21,612	$	1,993,709	$	3,590,688	$	(957,805)	(22,026,044)	$	(4,874)	$	(430,500)

The accompanying notes are an integral part of the condensed consolidated financial statements.

6

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY

(In thousands, except shares)

(unaudited)

				Class B			Series A					Retained							Accumulated Other Comprehensive Income (Loss)
	Common Stock			Common Stock			Preferred Stock			Additional		Earnings		Treasury Stock			Noncontrolling
	Amount		Shares	Amount		Shares	Amount		Shares	Capital		(Deficit)		Amount		Shares	Interests
Balance, December 31, 2020	$	676	67,596,515	$	43	4,339,431	$	—	21,612	$	1,942,810	$	2,601,662	$	(938,335)	(21,870,961)	$	(7,333)	$	(263,134)
Exercise of stock-based awards	2		165,641							(38)				(1,421)		(15,330)
Stock-based compensation expense										5,954
Tax withholding related to vesting of restricted stock units and retirement of common stock	—		(35,289)							(2,209)		(617)
Noncontrolling interests																	(24)
Net income attributable to WESCO International, Inc.												59,178
Preferred stock dividends												(14,352)
Translation adjustments and other																			16,841
Balance, March 31, 2021	$	678	67,726,867	$	43	4,339,431	$	—	21,612	$	1,946,517	$	2,645,871	$	(939,756)	(21,886,291)	$	(7,357)	$	(246,293)
Exercise of stock-based awards	2		194,615							(1)				(7,942)		(74,698)
Stock-based compensation expense										7,225
Tax withholding related to vesting of restricted stock units and retirement of common stock	—		(1,520)							(88)		(49)
Noncontrolling interests																	89
Net income attributable to WESCO International, Inc.												119,195
Preferred stock dividends												(14,352)
Translation adjustments and other																			21,219
Balance, June 30, 2021	$	680	67,919,962	$	43	4,339,431	$	—	21,612	$	1,953,653	$	2,750,665	$	(947,698)	(21,960,989)	$	(7,268)	$	(225,074)
Exercise of stock-based awards	2		187,770							(2)				(2,306)		(19,858)
Stock-based compensation expense										9,605
Tax withholding related to vesting of restricted stock units and retirement of common stock	(1)		(58,214)							(1,887)		(4,162)
Noncontrolling interests																	600
Net income attributable to WESCO International, Inc.												119,596
Preferred stock dividends												(14,352)
Translation adjustments and other																			(50,277)
Balance, September 30, 2021	$	681	68,049,518	$	43	4,339,431	$	—	21,612	$	1,961,369	$	2,851,747	$	(950,004)	(21,980,847)	$	(6,668)	$	(275,351)

The accompanying notes are an integral part of the condensed consolidated financial statements.

7

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

1. ORGANIZATION

WESCO International, Inc. ("Wesco International") and its subsidiaries (collectively, “Wesco” or the "Company"), headquartered in Pittsburgh, Pennsylvania, is a leading provider of business-to-business distribution, logistics services and supply chain solutions.

The Company has operating segments comprising three strategic business units consisting of Electrical & Electronic Solutions ("EES"), Communications & Security Solutions ("CSS") and Utility & Broadband Solutions ("UBS").

2. ACCOUNTING POLICIES

Basis of Presentation

The accompanying unaudited Condensed Consolidated Financial Statements of Wesco have been prepared in accordance with Rule 10-01 of Regulation S-X of the Securities and Exchange Commission (the “SEC”). The unaudited condensed consolidated financial information should be read in conjunction with the audited Consolidated Financial Statements and Notes thereto included in WESCO International, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2021, as filed with the SEC on February 25, 2022. The Condensed Consolidated Balance Sheet at December 31, 2021 was derived from the audited Consolidated Financial Statements as of that date, but does not include all of the disclosures required by accounting principles generally accepted in the United States of America.

The unaudited Condensed Consolidated Balance Sheet as of September 30, 2022, the unaudited Condensed Consolidated Statements of Income and Comprehensive Income and the unaudited Condensed Consolidated Statements of Stockholders' Equity for the three and nine months ended September 30, 2022, and 2021, and the unaudited Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2022, and 2021, respectively, in the opinion of management, have been prepared on the same basis as the audited Consolidated Financial Statements and include all adjustments necessary for the fair statement of the results of the interim periods presented herein. All adjustments reflected in the unaudited condensed consolidated financial information are of a normal recurring nature unless indicated. The results for the interim periods presented herein are not necessarily indicative of the results to be expected for the full year.

Recently Adopted and Recently Issued Accounting Standards

In March 2020, the Financial Accounting Standards Board (the "FASB") issued Accounting Standards Update ("ASU") 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The amendments in this ASU are effective for all entities as of March 12, 2020 through December 31, 2022. The Company adopted this ASU during the first quarter of 2022 in connection with amending Wesco's credit facilities, as disclosed in Note 7, "Debt". The replacement of London Interbank Offered Rate ("LIBOR") and the related adoption of the optional guidance under this accounting standard did not have a material impact on the Company's consolidated financial statements and notes thereto.

In October 2021, the FASB issued ASU 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which requires contract assets and contract liabilities acquired in a business combination to be recognized and measured by the acquirer on the acquisition date in accordance with ASC Topic 606, Revenue from Contracts with Customers, as if the acquirer had originated the contracts. The amendments in this ASU are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Management is currently evaluating the impact that the adoption of this accounting standard will have on its consolidated financial statements and notes thereto.

In September 2022, the FASB issued ASU 2022-04, Supplier Finance Programs (Subtopic 405-50): Disclosure of Supplier Finance Program Obligations, which requires that a buyer in a supplier finance program disclose sufficient information about the program to allow a user of financial statements to understand the program's nature, activity during the period, changes from period to period, and potential magnitude. The amendments in this ASU are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, except for the amendment on rollforward information, which is effective for fiscal years beginning after December 15, 2023. Early adoption is permitted. Management is currently evaluating the impact that the adoption of this accounting standard will have on its consolidated financial statements and notes thereto.

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.

8

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

3. REVENUE

Wesco distributes products and provides services to customers globally in various end markets within its business segments. The segments, which consist of EES, CSS and UBS, operate in the United States, Canada and various other international countries.

The following tables disaggregate Wesco’s net sales by segment and geography for the periods presented:

	Three Months Ended				Nine Months Ended
	September 30				September 30
(In thousands)	2022		2021		2022		2021
Electrical & Electronic Solutions	$	2,234,771	$	1,982,485	$	6,654,883	$	5,626,309
Communications & Security Solutions	1,602,459		1,488,689		4,638,631		4,200,424
Utility & Broadband Solutions	1,608,686		1,257,151		4,568,108		3,538,859
Total by segment	$	5,445,916	$	4,728,325	$	15,861,622	$	13,365,592

	Three Months Ended				Nine Months Ended
	September 30				September 30
(In thousands)	2022		2021		2022		2021
United States	$	4,050,924	$	3,407,437	$	11,745,090	$	9,656,183
Canada	765,281		709,507		2,288,146		2,020,395
Other International(1)	629,711		611,381		1,828,386		1,689,014
Total by geography(2)	$	5,445,916	$	4,728,325	$	15,861,622	$	13,365,592

(1)    No individual country's net sales are greater than 10% of total net sales.

(2)    Wesco attributes revenues from external customers to individual countries on the basis of point of sale.

Due to the terms of certain contractual arrangements, Wesco bills or receives payment from its customers in advance of satisfying the respective performance obligation. Such advance billings or payments are recorded as deferred revenue and recognized as revenue when the performance obligation has been satisfied and control has transferred to the customer, which is generally upon shipment. Deferred revenue is usually recognized within a year or less from the date of the advance billing or payment. At September 30, 2022 and December 31, 2021, $55.5 million and $35.5 million, respectively, of deferred revenue was recorded as a component of other current liabilities in the Condensed Consolidated Balance Sheets.

The Company also has certain long-term contractual arrangements where revenue is recognized over time based on the cost-to-cost input method. As of September 30, 2022 and December 31, 2021, the Company had contract assets of $38.6 million and $33.4 million, respectively, resulting from arrangements where the amount of revenue recognized exceeded the amount billed to the customer. Contract assets are recorded in the Condensed Consolidated Balance Sheets as a component of prepaid expenses and other current assets.

Wesco’s revenues are adjusted for variable consideration, which includes customer volume rebates, returns and discounts. Wesco measures variable consideration by estimating expected outcomes using analysis and inputs based upon historical data, as well as current and forecasted information. Variable consideration is reviewed by management on a monthly basis and revenue is adjusted accordingly. Variable consideration reduced revenue for the three months ended September 30, 2022 and 2021 by approximately $120.5 million and $85.8 million, respectively, and by approximately $324.1 million and $246.9 million for the nine months ended September 30, 2022 and 2021, respectively. The variable consideration for the three and nine months ended September 30, 2021 reflect adjustments that reduced the previously disclosed amounts by $9.7 million and $27.8 million, respectively. As of September 30, 2022 and December 31, 2021, the Company's estimated product return obligation was $45.5 million and $38.8 million, respectively.

Billings to customers for shipping and handling are recognized in net sales. Wesco has elected to recognize shipping and handling costs as a fulfillment cost. Shipping and handling costs recorded as a component of selling, general and administrative expenses totaled $77.9 million and $63.5 million for the three months ended September 30, 2022 and 2021, respectively, and $222.0 million and $179.5 million for the nine months ended September 30, 2022 and 2021, respectively.

9

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

4. GOODWILL AND INTANGIBLE ASSETS

Goodwill

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

	Nine Months Ended
	September 30, 2022
	EES		CSS		UBS		Total
	(In thousands)
Beginning balance, January 1	$	860,958	$	1,121,712	$	1,225,663	$	3,208,333
Foreign currency exchange rate changes	(44,301)		(14,449)		(26,153)		(84,903)
Ending balance, September 30	$	816,657	$	1,107,263	$	1,199,510	$	3,123,430

Intangible Assets

The components of intangible assets are as follows:

		As of
		September 30, 2022						December 31, 2021
	Life (in years)	Gross Carrying Amount (1)		Accumulated Amortization (1)		Net Carrying Amount		Gross Carrying Amount (1)		Accumulated Amortization (1)		Net Carrying Amount
Intangible assets:		(In thousands)
Trademarks	Indefinite	$	791,228	$	—	$	791,228	$	795,065	$	—	$	795,065
Customer relationships	10 - 20	1,400,841		(352,638)		1,048,203		1,431,251		(308,180)		1,123,071
Distribution agreements	15 - 19	29,212		(23,936)		5,276		29,212		(22,714)		6,498
Trademarks	5 - 12	15,543		(6,799)		8,744		38,758		(20,058)		18,700
Non-compete agreements	2	—		—		—		4,300		(3,493)		807
		$	2,236,824	$	(383,373)	$	1,853,451	$	2,298,586	$	(354,445)	$	1,944,141

(1)    Excludes the original cost and related accumulated amortization of fully-amortized intangible assets.

Amortization expense related to intangible assets totaled $21.0 million and $37.1 million for the three months ended September 30, 2022 and 2021, respectively, and $71.4 million and $85.8 million for the nine months ended September 30, 2022 and 2021, respectively.

The following table sets forth the remaining estimated amortization expense for intangible assets for the next five years and thereafter:

For the year ending December 31,	(In thousands)
2022	$	20,467
2023	81,838
2024	79,445
2025	76,389
2026	71,073
Thereafter	733,011

10

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

5. STOCK-BASED COMPENSATION

Wesco’s stock-based compensation awards are comprised of stock options, stock-settled stock appreciation rights, restricted stock units and performance-based awards. 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 stock appreciation rights is determined using the Black-Scholes model. The fair value of restricted stock units and performance-based awards with performance conditions is determined by the grant-date closing price of Wesco’s common stock. The forfeiture assumption is based on Wesco’s historical participant behavior that is reviewed on an annual basis. No dividends are assumed. For stock options and stock-settled stock appreciation rights that are exercised, and for restricted stock units and performance-based awards that vest, shares are issued out of Wesco's outstanding common stock.

Stock options and stock-settled stock appreciation rights vest ratably over a three-year period and terminate on the tenth anniversary of the grant date unless terminated sooner under certain conditions. Restricted stock unit awards granted in February 2020 and prior vest based on a minimum time period of three years. The special award described below vests in tranches. Restricted stock units awarded in 2022 and 2021 vest ratably over a three-year period on each of the first, second and third anniversaries of the grant date. Vesting of performance-based awards is based on a three-year performance period, and the number of shares earned, if any, depends on the attainment of certain performance levels. Outstanding awards would vest upon the consummation of a change in control transaction with performance-based awards vesting at the target level.

On July 2, 2020, a special award of restricted stock units was granted to certain officers of the Company. These awards vest in tranches of 30% on each of the first and second anniversaries of the grant date and 40% on the third anniversary of the grant date, subject, in each case, to continued employment through the applicable anniversary date.

Performance-based awards granted in 2022, 2021 and 2020 are based on two equally-weighted performance measures: the three-year average growth rate of Wesco's net income attributable to common stockholders and the three-year cumulative return on net assets. These awards are accounted for as awards with performance conditions; compensation cost is recognized over the performance period based upon Wesco's determination of whether it is probable that the performance targets will be achieved.

During the three and nine months ended September 30, 2022 and 2021, Wesco granted the following stock options, stock-settled stock appreciation rights, restricted stock units and performance-based awards at the following weighted-average fair values:

	Three Months Ended				Nine Months Ended
	September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021
Stock options granted	3,249		—		92,799		—
Weighted-average fair value	$	54.13	$	—	$	57.15	$	—
Stock-settled stock appreciation rights granted	—		—		—		139,592
Weighted-average fair value	$	—	$	—	$	—	$	33.19
Restricted stock units granted	1,669		6,897		226,615		314,480
Weighted-average fair value	$	112.33	$	108.76	$	122.04	$	77.81
Performance-based awards granted	—		—		83,991		122,812
Weighted-average fair value	$	—	$	—	$	122.09	$	76.76

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

The fair values of stock options and stock-settled stock appreciation rights, as disclosed in the table above, were estimated using the following weighted-average assumptions in the respective periods:

	Three Months Ended			Nine Months Ended
	September 30, 2022		September 30, 2021	September 30, 2022		September 30, 2021
Risk free interest rate	2.9	%	n/a	2.0	%	0.8	%
Expected life (in years)	7		n/a	7		7
Expected volatility	44	%	n/a	43	%	41	%

The risk-free interest rate is based on the U.S. Treasury Daily Yield Curve as of the grant date. The expected life is based on historical exercise experience and the expected volatility is based on the volatility of the Company's daily stock price over the expected life preceding the grant date of the award.

The following table sets forth a summary of stock options for the nine months ended September 30, 2022:

	Awards	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value (In thousands)
Outstanding at December 31, 2021	—	$	—
Granted	92,799	121.58
Exercised	—	—
Forfeited	(5,452)	122.09
Outstanding at September 30, 2022	87,347	$	121.55	9.3	$	39
Exercisable at September 30, 2022	879	$	122.09	0.9	$	—

The following table sets forth a summary of stock-settled stock appreciation rights for the nine months ended September 30, 2022:

	Awards	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value (In thousands)
Outstanding at December 31, 2021	1,370,388	$	62.09
Granted	—	—
Exercised	(101,076)	61.79
Forfeited	(8,891)	73.35
Outstanding at September 30, 2022	1,260,421	$	62.03	5.4	$	72,283
Exercisable at September 30, 2022	1,095,626	$	61.92	5.1	$	62,959

For the nine months ended September 30, 2022, the aggregate intrinsic value of stock-settled stock appreciation rights exercised during such period was $7.3 million.

12

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

The following table sets forth a summary of time-based restricted stock units for the nine months ended September 30, 2022:

	Awards	Weighted- Average Fair Value
Unvested at December 31, 2021	974,162	$	53.48
Granted	226,615	122.04
Vested	(382,954)	53.23
Forfeited	(35,118)	62.58
Unvested at September 30, 2022	782,705	$	73.04

The following table sets forth a summary of performance-based awards for the nine months ended September 30, 2022:

	Awards	Weighted- Average Fair Value
Unvested at December 31, 2021	380,819	$	59.23
Granted	83,991	122.09
Vested	(115,394)	54.64
Forfeited	(14,087)	60.75
Unvested at September 30, 2022	335,329	$	75.26

Wesco recognized $9.7 million and $9.6 million of non-cash stock-based compensation expense for the three months ended September 30, 2022 and 2021, respectively, and $34.4 million and $22.8 million for the nine months ended September 30, 2022 and 2021, respectively, which is included in selling, general and administrative expenses for all such periods. As of September 30, 2022, there was $58.2 million of total unrecognized compensation expense related to non-vested stock-based compensation arrangements for all awards previously made of which approximately $10.7 million is expected to be recognized over the remainder of 2022, $30.8 million in 2023, $14.9 million in 2024 and $1.8 million in 2025.

6. EARNINGS PER SHARE

Basic earnings per share is computed by dividing net income attributable to common stockholders by the weighted-average number of common shares outstanding during the periods. Diluted earnings per share is computed by dividing net income attributable to common stockholders 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 equity awards.

13

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

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

	Three Months Ended				Nine Months Ended
	September 30				September 30
(In thousands, except per share data)	2022		2021		2022		2021
Net income attributable to WESCO International, Inc.	$	239,602	$	119,596	$	641,551	$	297,969
Less: Preferred stock dividends	14,352		14,352		43,056		43,056
Net income attributable to common stockholders	$	225,250	$	105,244	$	598,495	$	254,913
Weighted-average common shares outstanding used in computing basic earnings per share	50,815		50,386		50,711		50,252
Common shares issuable upon exercise of dilutive equity awards	1,574		1,677		1,675		1,644
Weighted-average common shares outstanding and common share equivalents used in computing diluted earnings per share	52,389		52,063		52,386		51,896
Earnings per share attributable to common stockholders
Basic	$	4.43	$	2.09	$	11.80	$	5.07
Diluted	$	4.30	$	2.02	$	11.42	$	4.91

The computation of diluted earnings per share attributable to common stockholders excludes stock-based awards that would have had an antidilutive effect on earnings per share. For the three and nine months ended September 30, 2022, there were 88,896 and 88,071 antidilutive shares, respectively. For the three months ended September 30, 2021, there we no antidilutive stock-based awards, and for the nine months then ended, there were 139,592 antidilutive shares.

14

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

7. DEBT

The following table sets forth Wesco's outstanding indebtedness:

	As of
	September 30, 2022		December 31, 2021
	(In thousands)
International lines of credit	$	6,659	$	7,354
Accounts Receivable Securitization Facility	1,525,000		1,270,000
Revolving Credit Facility	883,097		596,959
5.50% Anixter Senior Notes due 2023	58,636		58,636
6.00% Anixter Senior Notes due 2025	4,173		4,173
7.125% Senior Notes due 2025	1,500,000		1,500,000
7.250% Senior Notes due 2028, less debt discount of $7,155 and $8,088 in 2022 and 2021, respectively	1,317,845		1,316,912
Finance lease obligations	19,872		18,563
Total debt	5,315,282		4,772,597
Plus: Fair value adjustment to the Anixter Senior Notes	439		957
Less: Unamortized debt issuance costs	(53,610)		(62,484)
Less: Short-term debt and current portion of long-term debt(1)	(69,295)		(9,528)
Total long-term debt	$	5,192,816	$	4,701,542

(1)    As of September 30, 2022, short-term debt and current portion of long-term debt includes the $58.6 million aggregate principal amount of the Company's 5.50% Anixter Senior Notes due 2023, which mature on March 1, 2023.

Accounts Receivable Securitization Facility

On March 1, 2022, WESCO Distribution, Inc. (“Wesco Distribution”) amended its accounts receivable securitization facility (the “Receivables Facility”) pursuant to the terms and conditions of a Fourth Amendment to Fifth Amended and Restated Receivables Purchase Agreement (the “Fourth Receivables Amendment”), by and among WESCO Receivables Corp., Wesco Distribution, the various purchaser groups from time to time party thereto and PNC Bank, National Association, as administrator. The Fourth Receivables Amendment modified the receivables purchase agreement entered into on June 22, 2020 (the “Receivables Purchase Agreement”). The Fourth Receivables Amendment, among other things, (i) increased the purchase limit under the Receivables Facility from $1,300 million to $1,400 million, (ii) increased the aggregate commitment from $1,500 million to $1,750 million under an accordion feature that permits requests to increase the purchase limit, and (iii) extended the maturity date from June 1, 2024 to March 1, 2025. Additionally, the Fourth Receivables Amendment replaced the LIBOR interest rate option with Secured Overnight Financing Rate-based (“SOFR”) interest rate options, including term SOFR and daily simple SOFR, and decreased the interest rate spread from 1.15% to 1.10%. The commitment fee of the Receivables Facility were unchanged.

On August 2, 2022, Wesco Distribution further amended its Receivables Facility pursuant to the terms and conditions of a Fifth Amendment to Fifth Amended and Restated Receivables Purchase Agreement (the “Fifth Receivables Amendment”). The Fifth Receivables Amendment amends the Receivables Purchase Agreement to, among other things, increase the purchase limit under the Receivables Facility from $1,400 million to $1,525 million and to decrease the interest rate spread from 1.10% to 1.05%. The maturity date and commitment fee of the Receivables Facility were unchanged.

15

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

Under the Receivables Facility, Wesco Distribution sells, on a continuous basis, an undivided interest in all domestic accounts receivable to Wesco Receivables, a wholly owned special purpose entity (the “SPE”). The SPE sells, without recourse, a senior undivided interest in the receivables to financial institutions for cash while maintaining a subordinated undivided interest in the receivables, in the form of overcollateralization. Since Wesco Distribution maintains control of the transferred receivables, 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. Wesco Distribution 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.

Revolving Credit Facility

On March 1, 2022, Wesco Distribution amended its revolving credit facility (the “Revolving Credit Facility”) pursuant to the terms and conditions of a Second Amendment to Fourth Amended and Restated Credit Agreement (the “Second Revolver Amendment”), by and among Wesco Distribution, as the borrower representative, the other U.S. borrowers party thereto, WESCO Distribution Canada LP, the other Canadian borrowers party thereto, WESCO International, the lenders party thereto and Barclays Bank PLC, as the administrative agent. The Second Revolver Amendment modified the revolving credit facility entered into on June 22, 2020 (the "Revolving Credit Agreement"). The Second Revolver Amendment, among other things, (i) increased the revolving commitments under the Revolving Credit Facility from $1,200 million to $1,350 million, (ii) increased the sub-facility for loans denominated in Canadian dollars from $500 million to $550 million, (iii) increased the capacity to request increases in the aggregate revolving commitments from $400 million to $650 million, (iv) modified certain negative covenants to provide for additional flexibility, and (v) extended the maturity date from June 22, 2025 to March 1, 2027. Additionally, the Second Revolver Amendment replaced the LIBOR-based interest rate option with SOFR-based interest rate options, including term SOFR and daily simple SOFR. The applicable interest rate for borrowings under the Revolving Credit Facility, as amended, includes interest rate spreads based on available borrowing capacity that range from 1.00% to 1.50% for SOFR-based borrowings and from 0.00% to 0.50% for prime rate-based borrowings.

On August 2, 2022, Wesco Distribution further amended its Revolving Credit Facility pursuant to the terms and conditions of a Third Amendment to Fourth Amended and Restated Credit Agreement (the “Third Revolver Amendment”). The Third Revolver Amendment amends the Revolving Credit Agreement to, among other things, increase the revolving commitments under the Revolving Credit Facility from $1,350 million to $1,525 million and to increase the sub-facility for loans denominated in Canadian dollars from $550 million to $600 million. The maturity date and interest rate spreads of the Revolving Credit Facility were unchanged.

8. EMPLOYEE BENEFIT PLANS

Defined Contribution Plans

Wesco Distribution sponsors a defined contribution retirement savings plan for the majority of its U.S. employees (the "WESCO Distribution, Inc. Retirement Savings Plan"). Effective January 1, 2022, the defined contribution plan covering all of Anixter Inc.'s non-union U.S. employees (the "Anixter Inc. Employee Savings Plan") was merged with and into the WESCO Distribution, Inc. Retirement Savings Plan (the "U.S. Defined Contribution Plan Merger"). On December 31, 2021, participant account balances were transferred from the Anixter Inc. Employee Savings Plan to the WESCO Distribution, Inc. Retirement Savings Plan. In connection with the U.S. Defined Contribution Plan Merger, the WESCO Distribution, Inc. Retirement Savings Plan was amended to change the employer matching contribution at an amount equal to 100% of a participant's eligible elective deferrals up to 3% of the participant's eligible compensation and 50% of the next 4% of eligible compensation, and to eliminate discretionary employer contributions.

WESCO Distribution Canada LP, a wholly-owned subsidiary of the Company, sponsors a defined contribution plan covering the current full-time employees of WESCO Distribution Canada LP and part-time employees meeting certain requirements for continuous service, earnings and minimum hours of employment (the "Wesco Canadian Defined Contribution Plan"). Effective January 1, 2022, the defined contribution plan for certain employees of Anixter Canada Inc. and Anixter Power Solutions Canada Inc. (the "Anixter Canadian Defined Contribution Plan") was merged with and into an amended Wesco Canadian Defined Contribution Plan. During the first quarter of 2022, participant account balances were transferred from the Anixter Canadian Defined Contribution Plan to the amended Wesco Canadian Defined Contribution Plan. The amended Wesco Canadian Defined Contribution Plan provides a core employer contribution of 3% of a participant's eligible compensation, plus a matching contribution equal to 50% of a participant's elective contributions up to 4% of eligible compensation (for a maximum total employer contribution equal to 5%). The amended Wesco Canadian Defined Contribution Plan also requires employees of EECOL Electric Corp. hired on or after January 1, 2022 to join this Canadian defined contribution plan, and permits enrollment for those not participating in the defined benefit plan described below.

16

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

Wesco incurred charges of $12.4 million and $16.4 million for the three months ended September 30, 2022 and 2021, respectively, and $45.4 million and $49.1 million for the nine months ended September 30, 2022 and 2021, respectively, for all defined contribution plans.

Deferred Compensation Plans

Wesco Distribution sponsors a non-qualified deferred compensation plan (the "Wesco Deferred Compensation Plan") that permits select employees to make pre-tax deferrals of salary and bonus. Employees have the option to transfer balances allocated to their accounts in the Wesco Deferred Compensation Plan into any of the available investment options. The Wesco Deferred Compensation Plan is an unfunded plan. As of September 30, 2022 and December 31, 2021, the Company's obligation under the Wesco Deferred Compensation Plan was $19.6 million and $20.9 million, respectively, which is included in other noncurrent liabilities in the Condensed Consolidated Balance Sheets.

Defined Benefit Plans

Wesco sponsors a contributory defined benefit plan covering substantially all Canadian employees of EECOL Electric Corp., a wholly-owned subsidiary of the Company (the "EECOL Plan") and a Supplemental Executive Retirement Plan for certain executives of EECOL Electric Corp. (the "EECOL SERP").

Anixter Inc. sponsors the Anixter Inc. Pension Plan, which was closed to entrants first hired or rehired on or after July 1, 2015, and various defined benefit pension plans covering employees of foreign subsidiaries in Canada and Europe (together with the "EECOL Plan" and "EECOL SERP", the "Foreign Plans"). The majority of the Company's defined benefit pension plans are non-contributory, and with the exception of the U.S. and Canada, cover substantially all full-time employees in their respective countries. Retirement benefits are provided based on compensation as defined in each of the plan agreements. The Anixter Inc. Pension Plan is funded as required by the Employee Retirement Income Security Act of 1974 and the Internal Revenue Service. With the exception of the EECOL SERP, which is an unfunded plan, the Foreign Plans are funded as required by applicable foreign laws.

During the fourth quarter of 2021, the Company adopted certain plan amendments to: (i) freeze the benefits provided under the Anixter Inc. Pension Plan effective December 31, 2021, (ii) close participation in the EECOL Plan and EECOL SERP effective December 31, 2021, and (iii) freeze the benefit accruals under the Pension Plan for Employees of Anixter Canada Inc., the EECOL Plan and the EECOL SERP effective December 31, 2023.

The Company expects to contribute approximately $10.8 million to its Foreign Plans in 2022, of which approximately $9.3 million was contributed during the nine months ended September 30, 2022. The Company does not expect to make a contribution to its domestic qualified pension plan in 2022 due to its overfunded status.

17

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

The following tables set forth the components of net periodic pension (benefit) cost for the Company's defined benefit plans:

	Three Months Ended
(In thousands)	September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021
	Domestic Plans				Foreign Plans				Total
Service cost	$	—	$	764	$	2,047	$	3,251	$	2,047	$	4,015
Interest cost	2,083		2,018		2,174		2,465		4,257		4,483
Expected return on plan assets	(3,497)		(4,414)		(4,017)		(4,277)		(7,514)		(8,691)
Recognized actuarial gain(1)	—		—		(179)		103		(179)		103
Net periodic pension (benefit) cost	$	(1,414)	$	(1,632)	$	25	$	1,542	$	(1,389)	$	(90)

	Nine Months Ended
(In thousands)	September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021
	Domestic Plans				Foreign Plans				Total
Service cost	$	—	$	2,291	$	6,318	$	9,791	$	6,318	$	12,082
Interest cost	6,250		6,095		6,742		7,425		12,992		13,520
Expected return on plan assets	(10,491)		(13,241)		(12,468)		(12,898)		(22,959)		(26,139)
Recognized actuarial gain(1)	—		—		(547)		311		(547)		311
Settlement	—		(19)		—		—		—		(19)
Net periodic pension (benefit) cost	$	(4,241)	$	(4,874)	$	45	$	4,629	$	(4,196)	$	(245)

(1)    For the three and nine months ended September 30, 2022 and 2021, no material amounts were reclassified from accumulated other comprehensive income into net income.

The service cost of $2.0 million and $4.0 million for the three months ended September 30, 2022 and 2021, respectively, and $6.3 million and $12.1 million for the nine months ended September 30, 2022 and 2021, respectively, is reported as a component of selling, general and administrative expenses. The other components of net periodic pension (benefit) cost totaling net benefits of $3.4 million and $4.1 million for the three months ended September 30, 2022 and 2021, respectively, and $10.5 million and $12.3 million for the nine months ended September 30, 2022 and 2021, respectively, are presented as components of other non-operating income ("other expense (income), net").

Other Benefits

Prior to its acquisition by Wesco on June 22, 2020, Anixter granted restricted stock units in the ordinary course of business to its employees and directors. These awards, for which vesting did not accelerate solely as a result of the Company's merger with Anixter, were converted into cash-only settled Wesco phantom stock units, which vest ratably over a 3-year period. As of September 30, 2022 and December 31, 2021, the estimated fair value of these awards was $7.9 million and $22.7 million, respectively.

As of September 30, 2022, the Company's liability for these awards is $7.1 million, which is included in accrued payroll and benefit costs in the Condensed Consolidated Balance Sheet. As of December 31, 2021, the Company's liability for these awards was $17.3 million, of which $10.9 million was included in accrued payroll and benefit costs and $6.4 million was a component of other noncurrent liabilities in the Condensed Consolidated Balance Sheet.

The Company recognized compensation expense associated with these awards of $1.8 million and $3.4 million for the three months ended September 30, 2022 and 2021, respectively, and $1.6 million and $9.8 million for the nine months ended September 30, 2022 and 2021, respectively, which is reported as a component of selling, general and administrative expenses.

9. FAIR VALUE OF FINANCIAL INSTRUMENTS

The Company’s financial instruments primarily consist of cash and cash equivalents, accounts receivable, accounts payable, bank overdrafts, outstanding indebtedness, foreign currency forward contracts, and benefit plan assets. Except for benefit plan assets, outstanding indebtedness and foreign currency forward contracts, the carrying value of the Company’s remaining financial instruments approximates fair value.

18

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

The assets of the Company's various defined benefit plans are primarily comprised of common/collective/pool funds (i.e., mutual funds). These funds are valued at the net asset value (NAV) of shares held in the underlying funds. Investments for which fair value is measured using the NAV per share practical expedient are not classified in the fair value hierarchy.

The Company uses a market approach to determine the fair value of its debt instruments, utilizing quoted prices in active markets, interest rates and other relevant information generated by market transactions involving similar instruments. Therefore, the inputs used to measure the fair value of the Company's debt instruments are classified as Level 2 within the fair value hierarchy.

The carrying value of Wesco's debt instruments with fixed interest rates was $2,881.1 million and $2,880.7 million as of September 30, 2022 and December 31, 2021, respectively. The estimated fair value of this debt was $2,866.5 million and $3,118.0 million as of September 30, 2022 and December 31, 2021, respectively. The reported carrying values of Wesco's other debt instruments, including those with variable interest rates, approximated their fair values as of September 30, 2022 and December 31, 2021.

The Company purchases foreign currency forward contracts to minimize the effect of fluctuations in foreign currency-denominated accounts on its earnings. The foreign currency forward contracts are not designated as hedges for accounting purposes. The Company's strategy is to negotiate terms for its derivatives and other financial instruments to be highly effective, such that the change in the value of the derivative offsets the impact of the underlying hedge. Its counterparties to foreign currency forward contracts have investment-grade credit ratings. The Company regularly monitors the creditworthiness of its counterparties to ensure no issues exist that could affect the value of its derivatives.

The Company does not hedge 100% of its foreign currency-denominated accounts. In addition, the results of hedging can vary significantly based on various factors, such as the timing of executing foreign currency forward contracts versus the movement of currencies, as well as fluctuations in the account balances throughout each reporting period. The fair value of foreign currency forward contracts is based on the difference between the contract rate and the current price of a forward contract with an equivalent remaining term. The fair value of foreign currency forward contracts is measured using observable market information. These inputs are considered Level 2 in the fair value hierarchy. At September 30, 2022 and December 31, 2021, foreign currency forward contracts were revalued at then-current foreign exchange rates with the changes in valuation reflected directly in other non-operating income (expense) in the Condensed Consolidated Statements of Income and Comprehensive Income offsetting the transaction gain (loss) recorded on foreign currency-denominated accounts. At September 30, 2022 and December 31, 2021, the gross and net notional amounts of foreign currency forward contracts outstanding were approximately $224.3 million and $188.6 million, respectively. While all of the Company's foreign currency forward contracts are subject to master netting arrangements with its counterparties, assets and liabilities related to these contracts are presented on a gross basis within the Condensed Consolidated Balance Sheets. The gross fair value of assets and liabilities related to foreign currency forward contracts were immaterial.

10. COMMITMENTS AND CONTINGENCIES

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

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

11. INCOME TAXES

The effective tax rate for the three and nine months ended September 30, 2022 was 26.3% and 24.0%, respectively. The effective tax rate for the three and nine months ended September 30, 2021 was 27.2% and 22.0%, respectively. Wesco’s effective tax rate typically differs from the federal statutory income tax rate due to the tax effect of intercompany financing, foreign tax rate differences, the U.S. taxes imposed on foreign income, nondeductible expenses and state income taxes. For the three months ended September 30, 2022 and 2021, the effective tax rate reflects discrete income tax benefits of $3.2 million and $3.3 million, respectively, resulting from the exercise and vesting of stock-based awards. These discrete income tax benefits were offset by discrete income tax expense of $0.8 million and $4.2 million, respectively, resulting from return-to-provision adjustments. The net impact of discrete income tax items was a reduction to the estimated annual effective tax rate of approximately 0.7 percentage points for the three months ended September 30, 2022 and an increase of 0.7 percentage points for the three months ended September 30, 2021. For the nine months ended September 30, 2022 and 2021, the effective tax rate reflects discrete income tax benefits of $13.4 million and $8.3 million, respectively, resulting from reductions to the valuation allowance recorded against foreign tax credit carryforwards, as well as the exercise and vesting of stock-based awards of $9.4 million and $7.8 million, respectively. These discrete income tax benefits were partially offset by discrete income tax expense of $0.8 million and $4.2 million, respectively, resulting from return-to-provision adjustments. The net impact of discrete income tax items was a reduction to the estimated annual effective tax rate in such periods of approximately 2.6 and 3.1 percentage points, respectively.

There have been no material adjustments to liabilities for uncertain tax positions since December 31, 2021.

12. BUSINESS SEGMENTS

The Company has operating segments comprising three strategic business units consisting of EES, CSS and UBS. These operating segments are equivalent to the Company's reportable segments. The Company's chief operating decision maker evaluates the performance of its operating segments based primarily on net sales, adjusted earnings before interest, taxes, depreciation and amortization ("EBITDA"), and adjusted EBITDA margin percentage.

The Company incurs corporate costs primarily related to treasury, tax, information technology, legal and other centralized functions. The Company also has various corporate assets. Segment assets may not include jointly used assets, but segment results include depreciation expense or other allocations related to those assets. Interest expense and other non-operating items are either not allocated to the segments or reviewed on a segment basis. Corporate expenses and assets not directly identifiable with a reportable segment are reported in the tables below to reconcile the reportable segments to the consolidated financial statements.

The following tables set forth financial information by reportable segment for the periods presented:

(In thousands)	Three Months Ended September 30, 2022
	EES			CSS			UBS			Corporate		Total
Net sales	$	2,234,771		$	1,602,459		$	1,608,686		$	—	$	5,445,916
Adjusted EBITDA	225,764			156,370			186,257			(102,495)		465,896
Adjusted EBITDA Margin %	10.1		%	9.8		%	11.6		%			8.6		%
	Three Months Ended September 30, 2021
(In thousands)	EES			CSS			UBS			Corporate		Total
Net sales	$	1,982,485		$	1,488,689		$	1,257,151		$	—	$	4,728,325
Adjusted EBITDA	173,898			133,701			114,674			(92,013)		330,260
Adjusted EBITDA Margin %	8.8		%	9.0		%	9.1		%			7.0		%

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NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

(In thousands)	Nine Months Ended September 30, 2022
	EES			CSS			UBS			Corporate		Total
Net sales	$	6,654,883		$	4,638,631		$	4,568,108		$	—	$	15,861,622
Adjusted EBITDA	653,630			429,452			491,652			(300,256)		1,274,478
Adjusted EBITDA Margin %	9.8		%	9.3		%	10.8		%			8.0		%
	Nine Months Ended September 30, 2021
(In thousands)	EES			CSS			UBS			Corporate		Total
Net sales	$	5,626,309		$	4,200,424		$	3,538,859		$	—	$	13,365,592
Adjusted EBITDA	453,894			355,521			299,030			(252,391)		856,054
Adjusted EBITDA Margin %	8.1		%	8.5		%	8.4		%			6.4		%

The following table sets forth total assets by reportable segment for the periods presented:

	As of
	September 30, 2022
(In thousands)	EES		CSS		UBS		Corporate(1)		Total
Total assets	$	4,541,553	$	4,988,009	$	3,817,459	$	733,543	$	14,080,564
	As of
	December 31, 2021
(In thousands)	EES		CSS		UBS		Corporate(1)		Total
Total assets	$	4,098,335	$	4,601,132	$	3,266,231	$	652,001	$	12,617,699

(1)    Total assets for Corporate primarily consist of cash and cash equivalents, deferred income taxes, fixed assets and right-of-use assets associated with operating leases.

The following tables reconcile net income attributable to common stockholders to adjusted EBITDA and adjusted EBITDA margin % by segment, which are non-GAAP financial measures, for the periods presented:

	Three Months Ended September 30, 2022
(In thousands)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	214,054		$	138,747		$	180,354		$	(307,905)	$	225,250
Net income attributable to noncontrolling interests	200			—			—			408		608
Preferred stock dividends	—			—			—			14,352		14,352
Provision for income taxes	—			—			—			85,637		85,637
Interest expense, net	—			—			—			75,057		75,057
Depreciation and amortization	9,596			15,929			5,859			11,339		42,723
Other (income) expense, net	(1,069)			266			(1,063)			2,554		688
Stock-based compensation expense(1)	2,983			1,428			1,107			2,853		8,371
Merger-related and integration costs	—			—			—			13,210		13,210
Adjusted EBITDA	$	225,764		$	156,370		$	186,257		$	(102,495)	$	465,896
Adjusted EBITDA margin %	10.1		%	9.8		%	11.6		%			8.6		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the three months ended September 30, 2022 excludes $1.3 million as such amount is included in merger-related and integration costs.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

	Three Months Ended September 30, 2021
(In thousands)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	155,627		$	107,898		$	108,150		$	(266,431)	$	105,244
Net income attributable to noncontrolling interests	309			—			—			291		600
Preferred stock dividends	—			—			—			14,352		14,352
Provision for income taxes	—			—			—			44,870		44,870
Interest expense, net	—			—			—			69,720		69,720
Depreciation and amortization	16,840			24,723			5,869			9,300		56,732
Other (income) expense, net	(726)			328			22			(4,944)		(5,320)
Stock-based compensation expense(1)	1,848			752			633			5,079		8,312
Merger-related and integration costs	—			—			—			35,750		35,750
Adjusted EBITDA	$	173,898		$	133,701		$	114,674		$	(92,013)	$	330,260
Adjusted EBITDA margin %	8.8		%	9.0		%	9.1		%			7.0		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the three months ended September 30, 2021 excludes $1.3 million as such amount is included in merger-related and integration costs.

	Nine Months Ended September 30, 2022
(In thousands)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	615,547		$	373,073		$	472,119		$	(862,244)	$	598,495
Net income attributable to noncontrolling interests	561			—			—			878		1,439
Preferred stock dividends	—			—			—			43,056		43,056
Provision for income taxes	—			—			—			203,178		203,178
Interest expense, net	—			—			—			207,155		207,155
Depreciation and amortization	32,818			51,916			17,315			33,520		135,569
Other (income) expense, net	(2,646)			716			(452)			5,389		3,007
Stock-based compensation expense(1)	7,350			3,747			2,670			16,612		30,379
Merger-related and integration costs	—			—			—			52,200		52,200
Adjusted EBITDA	$	653,630		$	429,452		$	491,652		$	(300,256)	$	1,274,478
Adjusted EBITDA margin %	9.8		%	9.3		%	10.8		%			8.0		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the nine months ended September 30, 2022 excludes $4.1 million as such amount is included in merger-related and integration costs.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

	Nine Months Ended September 30, 2021
(In thousands)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	410,233		$	292,537		$	289,851		$	(737,708)	$	254,913
Net income attributable to noncontrolling interests	158			—			—			507		665
Preferred stock dividends	—			—			—			43,056		43,056
Provision for income taxes	—			—			—			84,201		84,201
Interest expense, net	—			—			—			207,683		207,683
Depreciation and amortization	40,184			60,257			16,545			27,659		144,645
Other (income) expense, net	(1,329)			909			44			(8,553)		(8,929)
Stock-based compensation expense(1)	4,648			1,818			1,517			10,972		18,955
Merger-related and integration costs	—			—			—			119,792		119,792
Net gain on divestitures	—			—			(8,927)			—		(8,927)
Adjusted EBITDA	$	453,894		$	355,521		$	299,030		$	(252,391)	$	856,054
Adjusted EBITDA margin %	8.1		%	8.5		%	8.4		%			6.4		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the nine months ended September 30, 2021 excludes $3.8 million as such amount is included in merger-related and integration costs.

Note: Adjusted EBITDA and Adjusted EBITDA margin % are non-GAAP financial measures that provide indicators of the Company's performance and its ability to meet debt service requirements. Adjusted EBITDA is defined as EBITDA before other non-operating expenses (income), non-cash stock-based compensation expense, merger-related and integration costs, and net gain on the divestiture of Wesco's legacy utility and data communications businesses in Canada. Adjusted EBITDA margin % is calculated by dividing Adjusted EBITDA by net sales.

13. SUBSEQUENT EVENTS

On October 27, 2022, the Company provided notice to participants in the Anixter Inc. Pension Plan of its intention to terminate such plan effective December 31, 2022. The Company will incorporate certain estimates that reflect the pending settlement in the assumptions used to measure the projected benefit obligation associated with this plan at the next measurement date as of December 31, 2022. The Company does not expect the termination to result in any curtailment gain or loss as the Anixter Inc. Pension Plan had previously been frozen during the fourth quarter of 2021. The Company anticipates that the assets held by the plan are sufficient to satisfy all benefit obligations upon termination.

On October 31, 2022, Wesco Distribution amended its Receivables Facility to increase the purchase limit from $1,525 million to $1,625 million.

Also on October 31, 2022, Wesco Distribution amended its Revolving Credit Facility to increase the revolving commitments from $1,525 million to $1,725 million and to increase the sub-facility for loans denominated in Canadian dollars from $600 million to $625 million.

On November 1, 2022, through its wholly-owned subsidiary Wesco Distribution, the Company closed its acquisition of Rahi Systems Holdings, Inc., a leading provider of global hyperscale data center solutions headquartered in Fremont, California. Wesco funded the purchase price paid at closing of $217 million with cash, and borrowings under the Receivables Facility and the Revolving Credit Facility. Due to the timing of the close of the acquisition, the Company will complete its preliminary purchase price allocation during the fourth quarter of 2022.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

Item 2.    Management's Discussion and Analysis of Financial Condition and Results of Operations.

The following discussion should be read in conjunction with the information in the unaudited condensed consolidated financial statements and notes thereto included in Item 1 of this Quarterly Report on Form 10-Q and WESCO International, Inc.’s audited Consolidated Financial Statements and Management’s Discussion and Analysis of Financial Condition and Results of Operations included in its Annual Report on Form 10-K for the fiscal year ended December 31, 2021. The matters discussed herein may contain forward-looking statements that are subject to certain risks and uncertainties that could cause actual results to differ materially from expectations. Certain of these risks are set forth in Item 1A of WESCO International, Inc.'s Annual Report on Form 10-K for the fiscal year ended December 31, 2021, as well as WESCO International, Inc.’s other reports filed with the Securities and Exchange Commission (the "SEC"). In this Item 2, "Wesco" refers to WESCO International, Inc., and its subsidiaries and its predecessors unless the context otherwise requires. References to "we," "us," "our" and the "Company" refer to Wesco and its subsidiaries.

In addition to the results provided in accordance with accounting principles generally accepted in the United States of America ("U.S. GAAP"), our discussion and analysis of financial condition and results of operations includes certain non-GAAP financial measures, which are defined further below. These financial measures include organic sales growth, earnings before interest, taxes, depreciation and amortization ("EBITDA"), adjusted EBITDA, adjusted EBITDA margin, financial leverage, adjusted selling, general and administrative expenses, adjusted income from operations, adjusted provision for income taxes, adjusted income before income taxes, adjusted net income, adjusted net income attributable to WESCO International, Inc., adjusted net income attributable to common stockholders, and adjusted earnings per diluted share. We believe that these non-GAAP measures are useful to investors as they provide a better understanding of our financial condition and results of operations on a comparable basis. Additionally, certain non-GAAP measures either focus on or exclude items impacting comparability of results, allowing investors to more easily compare our financial performance from period to period. Management does not use these non-GAAP financial measures for any purpose other than the reasons stated above.

Company Overview

Wesco, headquartered in Pittsburgh, Pennsylvania, is a leading provider of business-to-business distribution, logistics services and supply chain solutions.

We employ more than 18,000 people, maintain relationships with approximately 45,000 suppliers, and serve approximately 140,000 customers worldwide. With nearly 1,500,000 products, end-to-end supply chain services, and extensive digital capabilities, we provide innovative solutions to meet customer needs across commercial and industrial businesses, contractors, government agencies, institutions, telecommunications providers, and utilities. Our innovative value-added solutions include supply chain management, logistics and transportation, procurement, warehousing and inventory management, as well as kitting and labeling, limited assembly of products and installation enhancement. We have approximately 800 branches, warehouses and sales offices with operations in more than 50 countries, providing a local presence for customers and a global network to serve multi-location businesses and multi-national corporations.

In 2021, we established a new corporate brand strategy to adopt a single, master brand architecture. This initiative reflects our corporate integration strategy and simplifies engagement for our customers and suppliers. As a result, we have been migrating certain legacy sub-brands to the master brand architecture, a process that will continue for the next several years. Due to the strength of its recognition with customers and suppliers, we will continue to use the Anixter brand name as part of the master brand strategy for the foreseeable future.

We have operating segments comprising three strategic business units consisting of Electrical & Electronic Solutions ("EES"), Communications & Security Solutions ("CSS") and Utility & Broadband Solutions ("UBS"). These operating segments are equivalent to our reportable segments. The following is a description of each of our reportable segments and their business activities.

Electrical & Electronic Solutions

The EES segment, with over 6,400 employees supporting customers in over 50 countries, supplies a broad range of products and solutions primarily to the construction, industrial, and original equipment manufacturer ("OEM") markets. The product portfolio in this business includes a broad range of electrical equipment and supplies, automation and connected devices (the "Internet of Things" or "IoT"), security, lighting, wire and cable, safety, and maintenance, repair and operating ("MRO") products from industry-leading manufacturing partners. The EES service portfolio includes contractor solutions to improve project execution, direct and indirect manufacturing supply chain optimization programs, lighting and renewables advisory services, and digital and automation solutions to improve safety and productivity.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

Communications & Security Solutions

The CSS segment, with over 3,300 employees supporting customers in over 50 countries, is a global leader in the network infrastructure and security markets. CSS sells products directly to end-users or through various channels including data communications contractors, security, network, professional audio/visual and systems integrators. In addition to the core network infrastructure and security portfolio, CSS has a broad offering of safety and energy management solutions. CSS products are often combined with supply chain services to increase efficiency and productivity, including installation enhancement, project deployment, advisory, and IoT and digital services.

Utility & Broadband Solutions

The UBS segment, with over 2,400 employees supporting customers primarily in the U.S. and Canada, provides products and services to investor-owned utilities, public power companies, including municipalities, as well as global service providers, wireless providers, broadband operators and the contractors that service these customers. The UBS segment also includes our integrated supply business, which provides products and services to large industrial and commercial end-users to support their MRO spend. The products sold into the utility and broadband markets include wire and cable, transformers, transmission and distribution hardware, switches, protective devices, connectors, lighting, conduit, fiber and copper cable, connectivity products, pole line hardware, racks, cabinets, safety and MRO products, and point-to-point wireless devices. The UBS segment also offers a complete set of service solutions to improve customer supply chain efficiencies.

Overall Financial Performance

Our financial results for the first nine months of 2022 compared to the first nine months of 2021 reflect double-digit sales growth driven by the benefits of increased scale, secular growth trends and the execution of our cross-sell program, as well as margin expansion and the realization of integration synergies, partially offset by higher selling, general and administrative ("SG&A") payroll and payroll-related expenses consisting of salaries and variable compensation, volume-related costs, along with expenses associated with our digital transformation initiatives.

Net sales for the first nine months of 2022 increased $2.5 billion, or 18.7%, over the corresponding prior year period. The increase reflects price inflation, continued strong demand, secular growth trends, and execution of our cross-sell program, partially offset by the negative impact of fluctuations in foreign exchange rates. Cost of goods sold as a percentage of net sales was 78.3% and 79.2% for the first nine months of 2022 and 2021, respectively. The improvement of 90 basis points reflects our focus on value-driven pricing and pass-through of inflationary costs, along with the continued momentum of our gross margin improvement program. Cost of goods sold for the first nine months of 2021 included a write-down to the carrying value of certain personal protective equipment inventories, which increased cost of goods sold as a percentage of net sales by approximately 20 basis points.

Income from operations was $1.1 billion for the first nine months of 2022 compared to $0.6 billion for the first nine months of 2021, an increase of $474.7 million, or 81.6%. Income from operations as a percentage of net sales was 6.7% for the current nine-month period, compared to 4.4% for the first nine months of the prior year. Income from operations for the first nine months of 2022 includes merger-related and integration costs of $52.2 million. Additionally, in connection with an integration initiative to review our brand strategy, certain legacy trademarks are migrating to a master brand architecture, which resulted in $9.4 million of accelerated amortization expense for the nine months ended September 30, 2022. Adjusted for these amounts, income from operations was 7.0% of net sales. For the first nine months of 2021, income from operations adjusted for merger-related and integration costs of $119.8 million, accelerated trademark amortization expense of $20.2 million, and a net gain of $8.9 million resulting from the divestiture of our legacy utility and data communications businesses in Canada during the first quarter of 2021 was 5.3% of net sales. For the nine months ended September 30, 2022, income from operations compared to the prior year improved across all segments and reflects sales growth and lower cost of goods sold as a percentage of net sales, as well as the realization of integration synergies. Income from operations for the first nine months of 2022 was negatively impacted by higher SG&A payroll and payroll-related expenses consisting of salaries and variable compensation, as well as higher volume-related costs and expenses associated with our digital transformation initiatives.

Earnings per diluted share for the first nine months of 2022 was $11.42, based on 52.4 million diluted shares, compared to $4.91 for the first nine months of 2021, based on 51.9 million diluted shares. Adjusted for merger-related and integration costs, accelerated trademark amortization expense, and the related income tax effects, earnings per diluted share for the first nine months of 2022 was $12.29. Adjusted for merger-related and integration costs, accelerated trademark amortization expense, net gain on Canadian divestitures, and the related income tax effects, earnings per diluted share for the first nine months of 2021 was $6.80. Adjusted earnings per diluted share increased 80.7% year-over-year.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

During the first nine months of 2022, we continued to experience strong demand from many of our customers. We also continued to experience some delays in receiving products from our suppliers. We believe that the impact of these supply chain issues on our net sales for the third quarter of 2022 was consistent with the first and second quarters of the year. We are aggressively managing supply chain issues, which includes increasing inventory levels to service our customers. Our industry and the broader economy are experiencing supply chain challenges, including product delays and backlogged orders, shortages in raw materials and components, labor shortages, transportation challenges, and higher costs. We anticipate that these supply chain challenges, as well as inflationary pressures, will continue for the remainder of 2022 and may extend into 2023. We intend to continue to actively manage the impact of inflation on our results of operations. We cannot reasonably estimate possible future impacts from these disruptions at this time.

There continues to be ongoing uncertainties associated with the COVID-19 pandemic, including with respect to economic conditions and the possible resurgence of COVID-19 whether through the emergence of new variants of the virus or otherwise. As the duration and severity of the COVID-19 pandemic cannot be predicted, there is significant uncertainty as to the ultimate impact that COVID-19 will have on our business, results of operations and financial condition.

Cash Flow

Operating cash flow for the first nine months of 2022 was an outflow of $410.6 million. Net cash used in operating activities included net income of $643.0 million and non-cash adjustments to net income totaling $193.1 million, which were primarily comprised of depreciation and amortization of $135.6 million, stock-based compensation expense of $34.4 million, amortization of debt discount and debt issuance costs of $11.6 million, and deferred income taxes of $7.2 million. Operating cash flow also included changes in assets and liabilities of $1.2 billion, which were primarily comprised of an increase in inventories of $886.3 million as a result of investments to address supply chain challenges and to support increases in our sales backlog, including project-based business, an increase in trade accounts receivable of $737.6 million resulting from higher sales, partially offset by an increase in accounts payable of $479.6 million due to the aforementioned higher purchases of inventory.

Investing activities primarily included $59.4 million of capital expenditures mostly consisting of internal-use computer software and information technology hardware to support our digital transformation initiatives, as well as equipment and leasehold improvements to support our global network of branches, warehouses and sales offices.

Financing activities were primarily comprised of borrowings and repayments of $2.8 billion and $2.5 billion, respectively, related to our revolving credit facility (the "Revolving Credit Facility"), and borrowings and repayments of $380.0 million and $125.0 million, respectively, related to our accounts receivable securitization facility (the "Receivables Facility"). Financing activities for the first nine months of 2022 also included $43.1 million of dividends paid to holders of our Series A Preferred Stock, $25.0 million of payments for taxes related to the exercise and vesting of stock-based awards, and net proceeds from our various international lines of credit of approximately $0.2 million.

Financing Availability

During the first and third quarters of 2022 we amended our Receivables Facility and Revolving Credit Facility to, among other things, increase their borrowing capacities, extend their maturity dates, and replace London Inter-Bank Offered Rate-based (“LIBOR”) interest rate options with Secured Overnight Financing Rate-based (“SOFR”) interest rate options.

See Note 7, "Debt" of our Notes to the unaudited Condensed Consolidated Financial Statements for additional disclosure regarding the amendments to these facilities.

As of September 30, 2022, we had $600.3 million in total available borrowing capacity under our Revolving Credit Facility, which matures in March 2027.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

Results of Operations

Third Quarter of 2022 versus Third Quarter of 2021

The following table sets forth the percentage relationship to net sales of the financial statement line items in our Condensed Consolidated Statements of Income for the periods presented:

	Three Months Ended
	September 30, 2022		September 30, 2021
Net sales	100.0	%	100.0	%
Cost of goods sold (excluding depreciation and amortization)	77.9		78.7
Selling, general and administrative expenses	14.0		15.3
Depreciation and amortization	0.7		1.1
Income from operations	7.4		4.9
Interest expense, net	1.4		1.4
Other expense (income), net	—		—
Income before income taxes	6.0		3.5
Provision for income taxes	1.6		0.9
Net income	4.4		2.6
Net income attributable to noncontrolling interests	—		—
Net income attributable to WESCO International, Inc.	4.4		2.6
Preferred stock dividends	0.3		0.4
Net income attributable to common stockholders	4.1	%	2.2	%

Net Sales

The following table sets forth net sales and organic sales growth by segment for the periods presented:

	Three Months Ended				Growth/(Decline)
	September 30, 2022		September 30, 2021		Reported	Divestiture Impact		Foreign Exchange Impact		Workday Impact		Organic Sales Growth
	(In thousands)
EES	$	2,234,771	$	1,982,485	12.7%	—	%	(2.2)	%	—	%	14.9	%
CSS	1,602,459		1,488,689		7.6%	—	%	(2.0)	%	—	%	9.6	%
UBS	1,608,686		1,257,151		28.0%	—	%	(0.6)	%	—	%	28.6	%
Total net sales	$	5,445,916	$	4,728,325	15.2%	—	%	(1.7)	%	—	%	16.9	%

Note: Organic sales growth is a non-GAAP financial measure of sales performance. Organic sales growth is calculated by deducting the percentage impact from acquisitions and divestitures for one year following the respective transaction, fluctuations in foreign exchange rates and number of workdays from the reported percentage change in consolidated net sales.

Net sales were $5.4 billion for the third quarter of 2022 compared to $4.7 billion for the third quarter of 2021, an increase of 15.2%, reflecting price inflation, continued strong demand, secular growth trends, and the execution of our cross-sell program. Organic sales for the third quarter of 2022 grew by 16.9% as fluctuations in foreign exchange rates negatively impacted reported net sales by 1.7%. All segments reported increased sales versus the prior year period, as described below. For the three months ended September 30, 2022, pricing related to inflation favorably impacted our net sales by approximately 8%.

EES reported net sales of $2.2 billion for the third quarter of 2022 compared to $2.0 billion for the third quarter of 2021, an increase of 12.7%. Organic sales for the third quarter of 2022 grew by 14.9% as fluctuations in foreign exchange rates negatively impacted reported net sales by 2.2%. The increase reflects price inflation and strong end market demand, partially offset by the effect of supply chain constraints and commodity prices.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

CSS reported net sales of $1.6 billion for the third quarter of 2022 compared to $1.5 billion for the third quarter of 2021, an increase of 7.6%. Organic sales for the third quarter of 2022 grew by 9.6% as fluctuations in foreign exchange rates negatively impacted reported net sales by 2.0%. The increase reflects price inflation, growth in our security solutions and network infrastructure businesses, as well as and the benefits of cross selling, partially offset by the effect of supply chain constraints.

UBS reported net sales of $1.6 billion for the third quarter of 2022 compared to $1.3 billion for the third quarter of 2021, an increase of 28.0%. Organic sales for the third quarter of 2022 grew by 28.6% as fluctuations in foreign exchange rates negatively impacted reported net sales by 0.6%. The increase reflects price inflation, broad-based growth driven by investments in electrification, green energy, grid modernization and hardening, and rural broadband development, as well as expansion in our integrated supply business.

Cost of Goods Sold

Cost of goods sold for the third quarter of 2022 was $4.2 billion compared to $3.7 billion for the third quarter of 2021, an increase of $521.1 million. Cost of goods sold as a percentage of net sales was 77.9% and 78.7% for the third quarter of 2022 and 2021, respectively. The favorable reduction of 80 basis points reflects our focus on value-driven pricing and pass-through of inflationary costs, along with the continued momentum of our gross margin improvement program. The third quarter of 2021 included a write-down to the carrying value of certain personal protective equipment inventories, which increased cost of goods sold as a percentage of net sales by approximately 10 basis points.

Selling, General and Administrative Expenses

SG&A expenses primarily include payroll and payroll-related costs, shipping and handling, travel and entertainment, facilities, utilities, information technology expenses, professional and consulting fees, credit losses, gains (losses) on the sale of property and equipment, as well as real estate and personal property taxes. SG&A expenses for the third quarter of 2022 totaled $760.2 million versus $721.8 million for the third quarter of 2021, an increase of $38.4 million, or 5.3%. As a percentage of net sales, SG&A expenses were 14.0% and 15.3% for the third quarter of 2022 and 2021, respectively. SG&A expenses for the third quarter of 2022 include merger-related and integration costs of $13.2 million. Adjusted for this amount, SG&A expenses were $747.0 million, or 13.7% of net sales, for the third quarter of 2022. SG&A expenses for the third quarter of 2021 include $35.8 million of merger-related and integration costs. Adjusted for this amount, SG&A expenses were $686.0 million, or 14.5% of net sales, for the third quarter of 2021.

SG&A payroll and payroll-related expenses for the third quarter of 2022 of $481.7 million increased by $15.8 million compared to the same period in 2021 primarily due to higher salaries.

SG&A expenses not related to payroll and payroll-related costs for the third quarter of 2022 were $278.5 million compared to $255.9 million for the same period in 2021. The increase of $22.6 million primarily reflects higher volume-related costs driven by significant sales growth and digital transformation initiatives that contributed to higher expenses in the third quarter of 2022. These increases were partially offset by the realization of integration cost synergies, as well as lower professional and consulting fees associated with integration activities.

Depreciation and Amortization

Depreciation and amortization decreased $14.0 million to $42.7 million for the third quarter of 2022 compared to $56.7 million for the third quarter of 2021. The third quarter of 2022 and 2021 includes $0.4 million and $15.1 million, respectively, resulting from changes in the estimated useful lives of certain legacy trademarks that are migrating to our master brand architecture, as described above. As of September 30, 2022, we expect to recognize approximately $0.4 million of amortization expense for trademarks migrating to our master brand architecture over the remainder of 2022 and $5.3 million thereafter.

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Income from Operations

The following tables set forth income from operations by segment for the periods presented:

	Three Months Ended September 30, 2022
(In thousands)	EES		CSS		UBS		Corporate		Total
Income from operations	$	213,185	$	139,013	$	179,291	$	(129,897)	$	401,592
	Three Months Ended September 30, 2021
(In thousands)	EES		CSS		UBS		Corporate		Total
Income from operations	$	155,210	$	108,226	$	108,172	$	(142,142)	$	229,466

Income from operations was $401.6 million for the third quarter of 2022 compared to $229.5 million for the third quarter of 2021. The increase of $172.1 million, or 75.0%, reflects sales growth and lower cost of goods sold as a percentage of net sales, along with the realization of integration synergies, partially offset by higher SG&A payroll and payroll-related expenses, volume-related costs, as well as expenses associated with our digital transformation initiatives. Income from operations for the third quarter of 2022 was not materially affected by higher pricing related to inflation given the offsetting effect of higher costs for certain products.

EES reported income from operations of $213.2 million for the third quarter of 2022 compared to $155.2 million for the third quarter of 2021. The increase of $58.0 million primarily reflects the factors impacting the overall business, as described above.

CSS reported income from operations of $139.0 million for the third quarter of 2022 compared to $108.2 million for the third quarter of 2021. The increase of $30.8 million primarily reflects the factors impacting the overall business, as described above, as well as the negative impact of approximately 20 basis points from the prior year personal protective equipment inventory value write-down described in our overall results above.

UBS reported income from operations of $179.3 million for the third quarter of 2022 compared to $108.2 million for the third quarter of 2021. The increase of $71.1 million primarily reflects the factors impacting the overall business, as described above.

Corporate, which primarily incurs costs related to treasury, tax, information technology, legal and other centralized functions, recognized net expenses of $129.9 million for the third quarter of 2022 compared to $142.1 million for the third quarter of 2021. The decrease of $12.2 million primarily reflects a decrease in professional and consulting fees associated with integration activities.

Interest Expense, net

Net interest expense totaled $75.1 million for the third quarter of 2022 compared to $69.7 million for the third quarter of 2021. The increase reflects higher borrowings and an increase in variable interest rates.

Other Expense (Income), net

Other non-operating expense totaled $0.7 million for the third quarter of 2022 compared to other non-operating income of $5.3 million for the third quarter of 2021. As disclosed in Note 8, "Employee Benefit Plans" of our Notes to the unaudited Condensed Consolidated Financial Statements, we recognized net benefits of $3.4 million and $4.1 million associated with the non-service cost components of net periodic pension (benefit) cost for the three months ended September 30, 2022 and 2021, respectively. Due to fluctuations in the U.S. dollar against certain foreign currencies, we recognized a net foreign currency exchange loss of $4.4 million for the third quarter of 2022 compared to a net gain of $1.3 million for the third quarter of 2021.

Income Taxes

The provision for income taxes was $85.6 million for the third quarter of 2022 compared to $44.9 million for the corresponding quarter of the prior year, resulting in effective tax rates of 26.3% and 27.2%, respectively. The effective tax rate for the quarter ended September 30, 2022 was lower than the comparable prior year period due to the favorable net impact of discrete income tax items.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

Net Income and Earnings per Share

Net income for the third quarter of 2022 was $240.2 million compared to $120.2 million for the third quarter of 2021, an increase of $120.0 million, or 99.8%.

Preferred stock dividends expense, which relates to the fixed-rate reset cumulative perpetual preferred stock, Series A, that was issued in connection with the merger with Anixter, was $14.4 million for the third quarter of 2022 and 2021.

Net income and earnings per diluted share attributable to common stockholders were $225.3 million and $4.30, respectively, for the third quarter of 2022 compared to $105.2 million and $2.02, respectively, for the third quarter of 2021. Adjusted for merger-related and integration costs, accelerated trademark amortization expense, and the related income tax effects, net income and earnings per diluted share attributable to common stockholders were $235.2 million and $4.49, respectively, for the three months ended September 30, 2022 compared to $142.6 million and $2.74, respectively, for the three months ended September 30, 2021.

The following tables reconcile selling, general and administrative expenses, income from operations, provision for income taxes and earnings per diluted share to adjusted selling, general and administrative expenses, adjusted income from operations, adjusted provision for income taxes and adjusted earnings per diluted share, which are non-GAAP financial measures, for the periods presented:

	Three Months Ended
Adjusted SG&A Expenses:	September 30, 2022		September 30, 2021
	(In thousands)
Selling, general and administrative expenses	$	760,200	$	721,795
Merger-related and integration costs	(13,210)		(35,750)
Adjusted selling, general and administrative expenses	$	746,990	$	686,045

	Three Months Ended
Adjusted Income from Operations:	September 30, 2022		September 30, 2021
	(In thousands)
Income from operations	$	401,592	$	229,466
Merger-related and integration costs	13,210		35,750
Accelerated trademark amortization	389		15,147
Adjusted income from operations	$	415,191	$	280,363

	Three Months Ended
Adjusted Provision for Income Taxes:	September 30, 2022		September 30, 2021
	(In thousands)
Provision for income taxes	$	85,637	$	44,870
Income tax effect of adjustments to income from operations(1)	3,673		13,512
Adjusted provision for income taxes	$	89,310	$	58,382

(1)    The adjustments to income from operations have been tax effected at a rate of approximately 27% for the three months ended September 30, 2022 and 2021.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

	Three Months Ended
Adjusted Earnings per Diluted Share:	September 30, 2022		September 30, 2021
(In thousands, except per share data)
Adjusted income from operations	$	415,191	$	280,363
Interest expense, net	75,057		69,720
Other expense (income), net	688		(5,320)
Adjusted income before income taxes	339,446		215,963
Adjusted provision for income taxes	89,310		58,382
Adjusted net income	250,136		157,581
Net income attributable to noncontrolling interests	608		600
Adjusted net income attributable to WESCO International, Inc.	249,528		156,981
Preferred stock dividends	14,352		14,352
Adjusted net income attributable to common stockholders	$	235,176	$	142,629
Diluted shares	52,389		52,063
Adjusted earnings per diluted share	$	4.49	$	2.74

Note: For the three months ended September 30, 2022 and 2021, selling, general and administrative expenses, income from operations, the provision for income taxes and earnings per diluted share have been adjusted to exclude merger-related and integration costs, accelerated amortization expense associated with migrating to our master brand architecture, and the related income tax effects. These non-GAAP financial measures provide a better understanding of our financial results on a comparable basis.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

EBITDA, Adjusted EBITDA and Adjusted EBITDA margin %

The following tables reconcile net income attributable to common stockholders to EBITDA, adjusted EBITDA and adjusted EBITDA margin % by segment, which are non-GAAP financial measures, for the periods presented:

	Three Months Ended September 30, 2022
(In thousands)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	214,054		$	138,747		$	180,354		$	(307,905)	$	225,250
Net income attributable to noncontrolling interests	200			—			—			408		608
Preferred stock dividends	—			—			—			14,352		14,352
Provision for income taxes	—			—			—			85,637		85,637
Interest expense, net	—			—			—			75,057		75,057
Depreciation and amortization	9,596			15,929			5,859			11,339		42,723
EBITDA	$	223,850		$	154,676		$	186,213		$	(121,112)	$	443,627
Other (income) expense, net	(1,069)			266			(1,063)			2,554		688
Stock-based compensation expense(1)	2,983			1,428			1,107			2,853		8,371
Merger-related and integration costs	—			—			—			13,210		13,210
Adjusted EBITDA	$	225,764		$	156,370		$	186,257		$	(102,495)	$	465,896
Adjusted EBITDA margin %	10.1%			9.8%			11.6%					8.6%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the three months ended September 30, 2022 excludes $1.3 million as such amount is included in merger-related and integration costs.
	Three Months Ended September 30, 2021
(In thousands)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	155,627		$	107,898		$	108,150		$	(266,431)	$	105,244
Net income attributable to noncontrolling interests	309			—			—			291		600
Preferred stock dividends	—			—			—			14,352		14,352
Provision for income taxes	—			—			—			44,870		44,870
Interest expense, net	—			—			—			69,720		69,720
Depreciation and amortization	16,840			24,723			5,869			9,300		56,732
EBITDA	$	172,776		$	132,621		$	114,019		$	(127,898)	$	291,518
Other (income) expense, net	(726)			328			22			(4,944)		(5,320)
Stock-based compensation expense(1)	1,848			752			633			5,079		8,312
Merger-related and integration costs	—			—			—			35,750		35,750
Adjusted EBITDA	$	173,898		$	133,701		$	114,674		$	(92,013)	$	330,260
Adjusted EBITDA margin %	8.8		%	9.0		%	9.1		%			7.0		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the three months ended September 30, 2021 excludes $1.3 million as such amount is included in merger-related and integration costs.

Note: EBITDA, Adjusted EBITDA and Adjusted EBITDA margin % are non-GAAP financial measures that provide indicators of our performance and ability to meet debt service requirements. EBITDA is defined as earnings before interest, taxes, depreciation and amortization. Adjusted EBITDA is defined as EBITDA before other non-operating expenses (income), non-cash stock-based compensation expense and merger-related and integration costs. Adjusted EBITDA margin % is calculated by dividing Adjusted EBITDA by net sales.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

Nine Months Ended September 30, 2022 versus Nine Months Ended September 30, 2021

The following table sets forth the percentage relationship to net sales of the financial statement line items in our Condensed Consolidated Statements of Income for the periods presented:

	Nine Months Ended
	September 30, 2022		September 30, 2021
Net sales	100.0	%	100.0	%
Cost of goods sold (excluding depreciation and amortization)	78.3		79.2
Selling, general and administrative expenses	14.2		15.4
Depreciation and amortization	0.8		1.0
Income from operations	6.7		4.4
Interest expense, net	1.4		1.6
Other expense (income), net	—		(0.1)
Income before income taxes	5.3		2.9
Provision for income taxes	1.2		0.5
Net income	4.1		2.4
Net income attributable to noncontrolling interests	—		—
Net income attributable to WESCO International, Inc.	4.1		2.4
Preferred stock dividends	0.3		0.5
Net income attributable to common stockholders	3.8	%	1.9	%

Net Sales

The following table sets forth net sales and organic sales growth by segment for the periods presented:

	Nine Months Ended				Growth/(Decline)
	September 30, 2022		September 30, 2021		Reported		Divestiture Impact		Foreign Exchange Impact		Workday Impact		Organic Sales Growth
	(In thousands)
EES	$	6,654,883	$	5,626,309	18.3	%	(0.2)	%	(1.4)	%	0.5	%	19.4	%
CSS	4,638,631		4,200,424		10.4	%	—	%	(1.6)	%	0.5	%	11.5	%
UBS	4,568,108		3,538,859		29.1	%	(0.1)	%	(0.4)	%	0.5	%	29.1	%
Total net sales	$	15,861,622	$	13,365,592	18.7	%	(0.1)	%	(1.2)	%	0.5	%	19.5	%

Net sales were $15.9 billion for the first nine months of 2022 compared to $13.4 billion for the first nine months of 2021, an increase of 18.7%, reflecting price inflation, continued strong demand, secular growth trends, and the execution of our cross-sell program. Organic sales for the first nine months of 2022 grew by 19.5% as the number of workdays positively impacted reported net sales by 0.5%, while fluctuations in foreign exchange rates and the divestiture of our legacy utility and data communications businesses in Canada in the first quarter of 2021 negatively impacted reported net sales by 1.2% and 0.1%, respectively. All segments reported increased sales versus the prior year period, as discussed below. For the first nine months of 2022, pricing related to inflation favorably impacted our net sales by approximately 8%.

EES reported net sales $6.7 billion for the first nine months of 2022 compared to $5.6 billion for the first nine months of 2021, an increase of 18.3%. Organic sales for the first nine months of 2022 grew by 19.4% as the number of workdays positively impacted reported net sales by 0.5%, while fluctuations in foreign exchange rates and the Canadian divestitures described above negatively impacted reported net sales by 1.4% and 0.2%, respectively. The increase reflects price inflation, expansion in our industrial, construction, and original equipment manufacturer businesses, as well as the benefits of cross selling and secular growth trends in electrification and automation, partially offset by the effect of supply chain constraints and commodity prices.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

CSS reported net sales of $4.6 billion for the first nine months of 2022 compared to $4.2 billion for the first nine months of 2021, an increase of 10.4%. Organic sales for the first nine months of 2022 grew by 11.5% as the number of workdays positively impacted reported net sales by 0.5% and fluctuations in foreign exchange rates negatively impacted reported net sales by 1.6%. The increase reflects strong growth in our security solutions and network infrastructure businesses, as well as price inflation and the benefits of cross selling, partially offset by the effect of supply chain constraints.

UBS reported net sales of $4.6 billion for the first nine months of 2022 compared to $3.5 billion for the first nine months of 2021, an increase of 29.1%. Organic sales for the first nine months of 2022 grew by 29.1% as the number of workdays positively impacted reported net sales by 0.5%, while fluctuations in foreign exchange rates and the Canadian divestitures described above negatively impacted reported net sales by 0.4% and 0.1%, respectively. The increase reflects price inflation, broad-based growth in our utility and broadband businesses, as well as expansion in our integrated supply business.

Cost of Goods Sold

Cost of goods sold for the first nine months of 2022 was $12.4 billion compared to $10.6 billion for the first nine months of 2021, an increase of $1.8 billion. Cost of goods sold as a percentage of net sales was 78.3% for the first nine months of 2022 compared to 79.2% for the first nine months of 2021. The favorable reduction of 90 basis points reflects our focus on value-driven pricing and pass-through of inflationary costs, along with the continued momentum of our gross margin improvement program. The first nine months of 2021 included a write-down to the carrying value of certain personal protective equipment inventories, which increased cost of goods sold as a percentage of net sales by approximately 20 basis points.

Selling, General and Administrative Expenses

SG&A expenses primarily include payroll and payroll-related costs, shipping and handling, travel and entertainment, facilities, utilities, information technology expenses, professional and consulting fees, credit losses, gains (losses) on the sale of property and equipment, as well as real estate and personal property taxes. SG&A expenses for the first nine months of 2022 totaled $2.3 billion versus $2.1 billion for the first nine months of 2021, an increase of $193.2 million, or 9.4%. As a percentage of net sales, SG&A expenses were 14.2% and 15.4% for the first nine months of 2022 and 2021, respectively. SG&A expenses for the first nine months of 2022 include merger-related and integration costs of $52.2 million. Adjusted for this amount, SG&A expenses were 13.9% of net sales for the first nine months of 2022. SG&A expenses for the first nine months of 2021 include $119.8 million of merger-related and integration costs, as well as a net gain of $8.9 million resulting from the Canadian divestitures. Adjusted for these amounts, SG&A expenses were 14.6% of net sales for the first nine months of 2021.

SG&A payroll and payroll-related expenses for the first nine months of 2022 of $1.4 billion increased by $80.5 million compared to the same period in 2021 primarily due to higher salaries and variable compensation expense. Additionally, stock-based compensation expense increased as a result of raising our estimate of the payout levels for certain performance-based awards.

SG&A expenses not related to payroll and payroll-related costs for the first nine months of 2022 of $822.6 million increased by $112.7 million compared to the same period in 2021. The increase primarily reflects higher volume-related costs driven by significant sales growth and digital transformation initiatives that contributed to higher expenses in the first nine months of 2022, as well as the absence of the net gain recognized in the first quarter of 2021 on the Canadian divestitures. These increases were partially offset by the realization of integration cost synergies, as well as lower professional and consulting fees associated with integration activities.

Depreciation and Amortization

Depreciation and amortization decreased $9.0 million to $135.6 million for the first nine months of 2022 compared to $144.6 million for the first nine months of 2021. The first nine months of 2022 and 2021 includes $9.4 million and $20.2 million, respectively, resulting from changes in the estimated useful lives of certain legacy trademarks that are migrating to our master brand architecture, as described above.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

Income from Operations

The following tables set forth income from operations by segment for the periods presented:

	Nine Months Ended September 30, 2022
(In thousands)	EES		CSS		UBS		Corporate		Total
Income from operations	$	613,462	$	373,789	$	471,667	$	(402,588)	$	1,056,330
	Nine Months Ended September 30, 2021
(In thousands)	EES		CSS		UBS		Corporate		Total
Income from operations	$	409,062	$	293,446	$	289,895	$	(410,814)	$	581,589

Income from operations was $1.1 billion for the first nine months of 2022 compared to $0.6 billion for the first nine months of 2021. The increase of $474.7 million, or 81.6%, reflects sales growth and lower cost of goods sold as a percentage of net sales, along with the realization of integration synergies, partially offset by higher SG&A payroll and payroll-related expenses, volume-related costs, as well as expenses associated with our digital transformation initiatives.

EES reported income from operations of $613.5 million for the first nine months of 2022 compared to $409.1 million for the first nine months of 2021. The increase of $204.4 million primarily reflects the factors impacting the overall business, as described above.

CSS reported income from operations of $373.8 million for the first nine months of 2022 compared to $293.4 million for the first nine months of 2021. The increase of $80.4 million primarily reflects the factors impacting the overall business, as described above. Additionally, operating profit for the first nine months of 2021 was negatively impacted by approximately 40 basis points from the inventory write-down described under Cost of Goods Sold above.

UBS reported income from operations of $471.7 million for the first nine months of 2022 compared to $289.9 million for the first nine months of 2021. The increase of $181.8 million primarily reflects the factors impacting the overall business, as described above, offset by the benefit in the first quarter of 2021 from the net gain on the Canadian divestitures.

Corporate, which primarily incurs costs related to treasury, tax, information technology, legal and other centralized functions, recognized net expenses of $402.6 million for the first nine months of 2022 compared to $410.8 million for the first nine months of 2021. The decrease of $8.2 million primarily reflects a decrease in professional and consulting fees associated with integration activities, partially offset by an increase in information technology expenses.

Other Income and Expense, net

Other non-operating expense totaled $3.0 million for the first nine months of 2022 compared to other non-operating income of $8.9 million for the first nine months of 2021. As disclosed in Note 8, "Employee Benefit Plans" of our Notes to the unaudited Condensed Consolidated Financial Statements, we recognized net benefits of $10.5 million and $12.3 million associated with the non-service cost components of net periodic pension (benefit) cost for the nine months ended September 30, 2022 and 2021, respectively. Due to fluctuations in the U.S. dollar against certain foreign currencies, we recognized a net foreign currency exchange loss of $11.5 million for the first nine months of 2022 compared to a net loss of $1.4 million for the first nine months of 2021.

Income Taxes

The provision for income taxes was $203.2 million for the first nine months of 2022 compared to $84.2 million in last year's comparable period, resulting in effective tax rates of 24.0% and 22.0%, respectively. The effective tax rates for the first nine months of 2022 and last year's comparable period reflect discrete income tax benefits of $13.4 million and $8.3 million, respectively, resulting from reductions to the valuation allowance recorded against foreign tax credit carryforwards, as well as the exercise and vesting of stock-based awards of $9.4 million and $7.8 million, respectively. These discrete income tax benefits were partially offset by discrete income tax expense of $0.8 million and $4.2 million, respectively, resulting from return-to-provision adjustments. The net impact of discrete income tax items was a reduction to the estimated annual effective tax rates in such periods of approximately 2.6 and 3.1 percentage points, respectively.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

Net Income and Earnings per Share

Net income for the first nine months of 2022 was $643.0 million compared to $298.6 million for the first nine months of 2021, an increase of $344.4 million, or 115.3%.

Preferred stock dividends expense, which relates to the fixed-rate reset cumulative perpetual preferred stock, Series A, that was issued in connection with the merger with Anixter, was $43.1 million for the first nine months of 2022 and 2021.

Net income and earnings per diluted share attributable to common stockholders were $598.5 million and $11.42, respectively, for the first nine months of 2022 compared to $254.9 million and $4.91, respectively, for the first nine months of 2021. Adjusted for merger-related and integration costs, accelerated trademark amortization expense, and the related income tax effects, net income and earnings per diluted share attributable to common stockholders were $643.7 million and $12.29, respectively, for the first nine months of 2022. Adjusted for merger-related and integration costs, accelerated trademark amortization, net gain on Canadian divestitures, and the related income tax effects, net income and earnings per diluted share attributable to common stockholders were $353.0 million and $6.80, respectively, for the first nine months of 2021.

The following tables reconcile selling, general and administrative expenses, income from operations, provision for income taxes and earnings per diluted share to adjusted selling, general and administrative expenses, adjusted income from operations, adjusted provision for income taxes and adjusted earnings per diluted share, which are non-GAAP financial measures, for the periods presented:

	Nine Months Ended
Adjusted SG&A Expenses:	September 30, 2022		September 30, 2021
	(In thousands)
Selling, general and administrative expenses	$	2,251,162	$	2,057,952
Merger-related and integration costs	(52,200)		(119,792)
Net gain on divestitures	—		8,927
Adjusted selling, general and administrative expenses	$	2,198,962	$	1,947,087

	Nine Months Ended
Adjusted Income from Operations:	September 30, 2022		September 30, 2021
	(In thousands)
Income from operations	$	1,056,330	$	581,589
Merger-related and integration costs	52,200		119,792
Accelerated trademark amortization	9,384		20,196
Net gain on divestitures	—		(8,927)
Adjusted income from operations	$	1,117,914	$	712,650

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

	Nine Months Ended
Adjusted Provision for Income Taxes:	September 30, 2022		September 30, 2021
	(In thousands)
Provision for income taxes	$	203,178	$	84,201
Income tax effect of adjustments to income from operations(1)	16,371		32,968
Adjusted provision for income taxes	$	219,549	$	117,169

(1)    The adjustments to income from operations have been tax effected at rates of 27% and 25% for the nine months ended September 30, 2022 and 2021, respectively.

	Nine Months Ended
Adjusted Earnings per Diluted Share:	September 30, 2022		September 30, 2021
(In thousands, except per share data)
Adjusted income from operations	$	1,117,914	$	712,650
Interest expense, net	207,155		207,683
Other expense (income), net	3,007		(8,929)
Adjusted income before income taxes	907,752		513,896
Adjusted provision for income taxes	219,549		117,169
Adjusted net income	688,203		396,727
Net income attributable to noncontrolling interests	1,439		665
Adjusted net income attributable to WESCO International, Inc.	686,764		396,062
Preferred stock dividends	43,056		43,056
Adjusted net income attributable to common stockholders	$	643,708	$	353,006
Diluted shares	52,386		51,896
Adjusted earnings per diluted share	$	12.29	$	6.80

Note: For the nine months ended September 30, 2022, selling, general and administrative expenses, income from operations, the provision for income taxes and earnings per diluted share have been adjusted to exclude merger-related and integration costs, accelerated amortization expense associated with migrating to our master brand architecture, and the related income tax effects. For the nine months ended September 30, 2021, selling, general and administrative expenses, income from operations, the provision for income taxes and earnings per diluted share have been adjusted to exclude merger-related and integration costs, a net gain on the divestiture of our legacy utility and data communications businesses in Canada, accelerated amortization expense associated with migrating to our master brand architecture, and the related income tax effects. These non-GAAP financial measures provide a better understanding of our financial results on a comparable basis.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

EBITDA, Adjusted EBITDA and Adjusted EBITDA margin %

The following tables reconcile net income attributable to common stockholders to EBITDA, adjusted EBITDA and adjusted EBITDA margin % by segment, which are non-GAAP financial measures, for the periods presented:

	Nine Months Ended September 30, 2022
(In thousands)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	615,547		$	373,073		$	472,119		$	(862,244)	$	598,495
Net income attributable to noncontrolling interests	561			—			—			878		1,439
Preferred stock dividends	—			—			—			43,056		43,056
Provision for income taxes	—			—			—			203,178		203,178
Interest expense, net	—			—			—			207,155		207,155
Depreciation and amortization	32,818			51,916			17,315			33,520		135,569
EBITDA	$	648,926		$	424,989		$	489,434		$	(374,457)	$	1,188,892
Other (income) expense, net	(2,646)			716			(452)			5,389		3,007
Stock-based compensation expense(1)	7,350			3,747			2,670			16,612		30,379
Merger-related and integration costs	—			—			—			52,200		52,200
Adjusted EBITDA	$	653,630		$	429,452		$	491,652		$	(300,256)	$	1,274,478
Adjusted EBITDA margin %	9.8		%	9.3		%	10.8		%			8.0		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the nine months ended September 30, 2022 excludes $4.1 million as such amount is included in merger-related and integration costs.
	Nine Months Ended September 30, 2021
(In thousands)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	410,233		$	292,537		$	289,851		$	(737,708)	$	254,913
Net income attributable to noncontrolling interests	158			—			—			507		665
Preferred stock dividends	—			—			—			43,056		43,056
Provision for income taxes	—			—			—			84,201		84,201
Interest expense, net	—			—			—			207,683		207,683
Depreciation and amortization	40,184			60,257			16,545			27,659		144,645
EBITDA	$	450,575		$	352,794		$	306,396		$	(374,602)	$	735,163
Other (income) expense, net	(1,329)			909			44			(8,553)		(8,929)
Stock-based compensation expense(2)	4,648			1,818			1,517			10,972		18,955
Merger-related and integration costs	—			—			—			119,792		119,792
Net gain on divestitures	—			—			(8,927)			—		(8,927)
Adjusted EBITDA	$	453,894		$	355,521		$	299,030		$	(252,391)	$	856,054
Adjusted EBITDA margin %	8.1		%	8.5		%	8.4		%			6.4		%
(2) Stock-based compensation expense in the calculation of adjusted EBITDA for the nine months ended September 30, 2021 excludes $3.8 million as such amount is included in merger-related and integration costs.

Note: EBITDA, Adjusted EBITDA and Adjusted EBITDA margin % are non-GAAP financial measures that provide indicators of our performance and ability to meet debt service requirements. EBITDA is defined as earnings before interest, taxes, depreciation and amortization. Adjusted EBITDA is defined as EBITDA before other non-operating expenses (income), non-cash stock-based compensation expense, merger-related and integration costs, and net gain on the divestiture of our legacy utility and data communications businesses in Canada. Adjusted EBITDA margin % is calculated by dividing Adjusted EBITDA by net sales.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

Liquidity and Capital Resources

Our liquidity needs generally arise from fluctuations in our working capital requirements, information technology investments, capital expenditures, acquisitions and debt service obligations. As of September 30, 2022, we had $600.3 million in available borrowing capacity under our Revolving Credit Facility, after giving effect to outstanding letters of credit and certain borrowings under our international lines of credit, which combined with available cash of $84.7 million, provided liquidity of $685.0 million. Cash included in our determination of liquidity represents cash in certain deposit and interest-bearing investment accounts. We monitor the depository institutions that hold our cash and cash equivalents on a regular basis, and we believe that we have placed our deposits with creditworthy financial institutions.

We regularly review our mix of fixed versus variable rate debt, and we may, from time to time, issue or retire borrowings and/or refinance existing debt in an effort to mitigate the impact of interest rate and foreign exchange rate fluctuations, and to maintain a cost-effective capital structure consistent with our anticipated capital requirements. Economic conditions have contributed to increases in interest rates during 2022. Further increases will raise the rates we pay on our variable rate debt and will contribute to higher interest expense versus prior periods.

As of September 30, 2022, approximately 54% of our debt portfolio was comprised of fixed rate debt. We believe our capital structure has an appropriate mix of fixed versus variable rate debt and secured versus unsecured instruments.

Over the next several quarters, it is expected that excess liquidity will be directed primarily at debt reduction, integration activities and potential acquisitions, or returning capital to shareholders through the payment of dividends and our existing share repurchase authorization. We expect to maintain sufficient liquidity through our credit facilities and cash balances. We believe cash provided by operations and financing activities will be adequate to cover our operational and business needs for at least the next twelve months.

We communicate on a regular basis with our lenders regarding our financial and working capital performance, and liquidity position. We were in compliance with all financial covenants and restrictions contained in our debt agreements as of September 30, 2022.

We also measure our ability to meet our debt obligations based on our financial leverage ratio, which was 3.2 as of September 30, 2022 and 3.9 as of December 31, 2021. Since our merger with Anixter on June 22, 2020, we have reduced our financial leverage by 2.5.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

The following table sets forth our financial leverage ratio, which is a non-GAAP financial measure, for the periods presented:

	Twelve Months Ended
	September 30, 2022		December 31, 2021
(In millions of dollars, except ratio)
Net income attributable to common stockholders	$	751.6	$	408.0
Net income attributable to noncontrolling interests	1.8		1.0
Preferred stock dividends	57.4		57.4
Provision for income taxes	234.5		115.5
Interest expense, net	267.5		268.1
Depreciation and amortization	189.5		198.5
EBITDA	1,502.3		1,048.5
Other income, net(1)	(36.2)		(48.1)
Stock-based compensation expense	37.1		25.7
Merger-related and integration costs	90.9		158.5
Net gain on divestitures	—		(8.9)
Adjusted EBITDA	$	1,594.1	$	1,175.7
	As of
	September 30, 2022		December 31, 2021
Short-term debt and current portion of long-term debt, net	$	69.3	$	9.5
Long-term debt, net	5,192.8		4,701.5
Debt discount and debt issuance costs(2)	60.8		70.6
Fair value adjustments to Anixter Senior Notes due 2023 and 2025(2)	(0.4)		(0.9)
Total debt	5,322.5		4,780.7
Less: Cash and cash equivalents	234.1		212.6
Total debt, net of cash	$	5,088.4	$	4,568.1
Financial leverage ratio	3.2		3.9

(1)Other non-operating income for the twelve months ended September 30, 2022 and December 31, 2021 includes a $36.6 million curtailment gain resulting from the remeasurement of our pension obligations in the U.S. and Canada due to amending certain terms of such defined benefit plans.

(2)Debt is presented in the condensed consolidated balance sheets net of debt discount and debt issuance costs, and includes adjustments to record the long-term debt assumed in the merger with Anixter at its acquisition date fair value.

Note: Financial leverage ratio is a non-GAAP measure of the use of debt. Financial leverage ratio is calculated by dividing total debt, excluding debt discount, debt issuance costs and fair value adjustments, net of cash, by adjusted EBITDA. EBITDA is defined as the trailing twelve months earnings before interest, taxes, depreciation and amortization. Adjusted EBITDA is defined as the trailing twelve months EBITDA before other non-operating expenses (income), non-cash stock-based compensation expense, merger-related and integration costs, and net gain on the divestiture of our legacy utility and data communications businesses in Canada.

Most of the undistributed earnings of our foreign subsidiaries have been taxed in the U.S. under either the one-time tax on the deemed repatriation of undistributed foreign earnings, or the global intangible low-taxed income tax regime imposed by the Tax Cuts and Jobs Act of 2017. Future distributions of previously taxed earnings by our foreign subsidiaries should, therefore, result in minimal U.S. taxation. We continue to assert that the remaining undistributed earnings of our foreign subsidiaries are indefinitely reinvested. The distribution of earnings by our foreign subsidiaries in the form of dividends, or otherwise, may be subject to additional taxation. We believe that we are able to maintain sufficient liquidity for our domestic operations and commitments without repatriating cash from our foreign subsidiaries.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

We finance our operating and investing needs primarily with borrowings under our Revolving Credit Facility, Receivables Facility, as well as uncommitted lines of credit entered into by certain of our foreign subsidiaries to support local operations, some of which are overdraft facilities. The Revolving Credit Facility has a borrowing limit of $1,525 million and the purchase limit under the Receivables Facility is $1,525 million. As of September 30, 2022, we had $883.1 million and $1,525.0 million outstanding under the Revolving Credit Facility and Receivables Facility, respectively. The maximum borrowing limits of our international lines of credit vary by facility and range between $0.6 million and $31.0 million. Our international lines of credit generally are renewable on an annual basis and certain facilities are fully and unconditionally guaranteed by Wesco Distribution. Accordingly, certain borrowings under these lines directly reduce availability under our Revolving Credit Facility. As of September 30, 2022, we had $6.7 million outstanding under our international lines of credit.

On March 1, 2022, we amended our Receivables Facility to increase its borrowing capacity from $1,300 million to $1,400 million and extend its maturity date from June 21, 2024 to March 1, 2025. Additionally, the amendments to the Receivables Facility replaced the LIBOR-based interest rate option with SOFR-based interest rate options, including term SOFR and daily simple SOFR, and decreased the interest rate spread from 1.15% to 1.10%.

On March 1, 2022, we also amended our Revolving Credit Facility to, among other things, increase its borrowing capacity from $1,200 million to $1,350 million, extend its maturity date from June 22, 2025 to March 1, 2027, and replace its LIBOR-based interest rate option with SOFR-based interest rate options, including term SOFR and daily simple SOFR.

On August 2, 2022, we further amended our Receivables Facility to increase its borrowing capacity from $1,400 million to $1,525 million and to decrease the interest rate spread from 1.10% to 1.05%.

On August 2, 2022, we also further amended our Revolving Credit Facility to, among other things, increase its borrowing capacity from $1,350 million to $1,525 million and to increase the sub-facility for loans denominated in Canadian dollars from $550 million to $600 million.

As disclosed in Note 13, "Subsequent Events" of our Notes to the unaudited Condensed Consolidated Financial Statements, we amended our Revolving Credit Facility and Receivables Facility again on October 31, 2022 to increase their borrowing capacities to $1,725 million and $1,625 million, respectively, primarily to fund our acquisition of Rahi Systems Holdings, Inc.

For additional disclosure regarding our debt instruments, including our outstanding indebtedness as of September 30, 2022, see Note 7, "Debt" of our Notes to the unaudited Condensed Consolidated Financial Statements.

An analysis of cash flow for the first nine months of 2022 and 2021 follows:

Operating Activities

Net cash used in operations for the first nine months of 2022 totaled $410.6 million, compared to $172.7 million of cash provided by operating activities for the first nine months of 2021. Operating activities for the first nine months of 2022 included net income of $643.0 million and non-cash adjustments to net income totaling $193.1 million, which were primarily comprised of depreciation and amortization of $135.6 million, stock-based compensation expense of $34.4 million, amortization of debt discount and debt issuance costs of $11.6 million, and deferred income taxes of $7.2 million. Other sources of cash in the first nine months of 2022 included an increase in accounts payable of $479.6 million due to higher purchases of inventory and an increase in other current and noncurrent liabilities of $102.6 million primarily due to an increase in accrued interest. Primary uses of cash in the first nine months of 2022 included an increase in inventories of $886.3 million due to investments to address supply chain challenges and to support increases in our sales backlog, including project-based business, an increase in trade accounts receivable of $737.6 million resulting from higher sales, an increase in other current and noncurrent assets of $101.5 million primarily due to an increase in capitalized costs associated with developing cloud computing arrangements to support our digital transformation initiatives, an increase in other accounts receivable of $15.1 million, and a decrease in accrued payroll and benefit costs of $88.4 million resulting primarily from the payment of management incentive compensation earned in 2021.

Net cash provided by operating activities for the first nine months of 2021 totaled $172.7 million, which included net income of $298.6 million and non-cash adjustments to net income totaling $177.0 million that were primarily comprised of depreciation and amortization of $144.6 million, stock-based compensation expense of $22.8 million, amortization of debt discount and debt issuance costs of $15.3 million, a net gain of $8.9 million resulting from the Canadian divestitures, and deferred income taxes of $5.3 million. Other sources of cash for the first nine months of 2021 included an increase in accounts payable of $550.9 million due to higher purchases of inventory, an increase in other current and noncurrent liabilities of $95.9 million, an increase in accrued payroll and benefit costs of $65.1 million, and a decrease in other current and noncurrent assets of $19.3 million. Primary uses of cash in the first nine months of 2021 included an increase in trade accounts receivable of $521.5 million resulting from higher sales in the latter part of the quarter, an increase in inventories of $428.4 million to support

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

increased customer demand, and an increase in other accounts receivable of $84.3 million due to higher supplier volume rebate accruals.

Investing Activities

Net cash used in investing activities for the first nine months of 2022 was $57.2 million compared to $36.6 million of net cash provided by investing activities during the first nine months of 2021. Included in the first nine months of 2022 was capital expenditures of $59.4 million compared to $25.2 million for the nine month period ended September 30, 2021. Included in the first nine months of 2021 was $56.0 million of net proceeds from the divestiture of our legacy utility and data communications businesses in Canada.

Financing Activities

Net cash provided by financing activities for the first nine months of 2022 was $477.3 million, compared to $410.2 million of net cash used in financing activities for the first nine months of 2021. During the first nine months of 2022, financing activities were primarily comprised of borrowings and repayments of $2.8 billion and $2.5 billion, respectively, related to our Revolving Credit Facility, and borrowings and repayments of $380.0 million and $125.0 million, respectively, related to our Receivables Facility. The first nine months of 2022 also included $43.1 million of dividends paid to holders of our Series A Preferred Stock, $25.0 million of payments for taxes related to the exercise and vesting of stock-based awards, and net proceeds from our various international lines of credit of approximately $0.2 million.

During the first nine months of 2021, financing activities primarily consisted of the redemption of our $500.0 million aggregate principal amount of 5.375% Senior Notes due 2021 and our $354.7 million aggregate principal amount of 5.375% Senior Notes due 2024, borrowings and repayments of $1.7 billion and $1.4 billion, respectively, related to our Revolving Credit Facility, and borrowings and repayments of $763.0 million and $528.0 million, respectively, related to our Receivables Facility. The first nine months of 2021 also included $43.1 million of dividends paid to holders of our Series A Preferred Stock, $20.8 million of payments for taxes related to the exercise and vesting of stock-based awards, and net repayments related to our various international lines of credit of approximately $10.7 million.

Contractual Cash Obligations and Other Commercial Commitments

There were no material changes in our contractual obligations and other commercial commitments that would require an update to the disclosure provided in our Annual Report on Form 10-K for the fiscal year ended December 31, 2021.

Seasonality

Our operating results are not significantly affected by seasonal factors. Sales during the first and fourth quarters are usually affected by a reduced level of activity due to the impact of weather on projects. Sales typically increase beginning in March, with slight fluctuations per month through October. During periods of economic expansion or contraction, our sales by quarter have varied significantly from this pattern.

Critical Accounting Estimates

There have been no significant changes to the critical accounting estimates disclosed in Part II, Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of WESCO International, Inc.’s Annual Report on Form 10-K for the fiscal year ended December 31, 2021.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

Recent Accounting Standards

See Note 2, "Accounting Policies" of our Notes to the unaudited Condensed Consolidated Financial Statements for a description of recently adopted and recently issued accounting standards.

Forward-Looking Statements

All statements made herein that are not historical facts should be considered as forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Such statements involve known and unknown risks, uncertainties and other factors that may cause actual results to differ materially. These statements include, but are not limited to, statements relating to plans to declare and pay dividends, statements regarding the expected benefits and costs of the transaction between Wesco and Anixter, including anticipated future financial and operating results, synergies, accretion and growth rates, and the combined company's plans, objectives, expectations and intentions, statements that address the combined company's expected future business and financial performance, and other statements identified by words such as "anticipate," "plan," "believe," "estimate," "intend," "expect," "project," "will" and similar words, phrases or expressions. These forward-looking statements are based on current expectations and beliefs of Wesco's management, as well as assumptions made by, and information currently available to, Wesco's management, current market trends and market conditions and involve risks and uncertainties, many of which are outside of Wesco's and Wesco's management's control, and which may cause actual results to differ materially from those contained in forward-looking statements. Accordingly, you should not place undue reliance on such statements.

Those risks, uncertainties and assumptions include the risk of any unexpected costs or expenses resulting from the transaction, the risk that the transaction could have an adverse effect on the ability of the combined company to retain customers and retain and hire key personnel and maintain relationships with its suppliers, customers and other business relationships and on its operating results and business generally, or the risk that problems may arise in successfully integrating the businesses of the companies, which may result in the combined company not operating as effectively and efficiently as expected, the risk that the combined company may be unable to achieve synergies or other anticipated benefits of the transaction or it may take longer than expected to achieve those synergies or benefits, the risk that the leverage of the company may be higher than anticipated, the impact of natural disasters (including as a result of climate change), health epidemics, pandemics and other outbreaks, such as the ongoing COVID-19 pandemic, supply chain disruptions, and the impact of Russia's invasion of Ukraine, including the impact of sanctions or other actions taken by the U.S. or other countries, the increased risk of cyber incidents and exacerbation of key materials shortages, inflationary cost pressures, material cost increases, demand volatility, and logistics and capacity constraints, which may have a material adverse effect on the combined company's business, results of operations and financial condition, and other important factors that could cause actual results to differ materially from those projected. All such factors are difficult to predict and are beyond the combined company's control. Additional factors that could cause results to differ materially from those described above can be found in WESCO International, Inc.'s Annual Report on Form 10-K for the fiscal year ended December 31, 2021 and WESCO International, Inc.'s other reports filed with the SEC.

Item 3.    Quantitative and Qualitative Disclosures about Market Risks.

For a discussion of changes to the market risks that were previously disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2021, refer to Part I, Item 2, "Management's Discussion and Analysis of Financial Condition and Results of Operations” and to Part II, Item 1A, "Risk Factors”.

Item 4.    Controls and Procedures.

Under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, we conducted an evaluation of our disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)). Based on this evaluation, our principal executive officer and our principal financial officer concluded that our disclosure controls and procedures and internal control over financial reporting were effective as of the end of the period covered by this report.

There were no changes in the Company’s internal control over financial reporting that occurred during the quarterly period ended September 30, 2022, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

PART II—OTHER INFORMATION

Item 1. Legal Proceedings.

As set forth in Note 10, "Commitments and Contingencies" to the Notes to the unaudited Condensed Consolidated Financial Statements, from time to time, a number of lawsuits and claims have been or may be asserted against us relating to the conduct of our business, including litigation relating to commercial, product and employment matters (including wage and hour). The outcome of any litigation cannot be predicted with certainty, and some lawsuits may be determined adversely to us. However, management does not believe that the ultimate outcome of any such pending matters is likely to have a material adverse effect on our financial condition or liquidity, although the resolution in any fiscal period of one or more of these matters may have a material adverse effect on our results of operations for that period.

Item 1A. Risk Factors.

Various of the risk factors previously disclosed in Item 1A. to Part I of WESCO International, Inc.’s Annual Report on Form 10-K for the fiscal year ended December 31, 2021 address matters such as political instability, armed conflict, trade sanctions, cybersecurity, economic and financial market instability, supply chain challenges, commodity pricing and inflationary pressures. Russia’s invasion of Ukraine in the first quarter of 2022, the ongoing conflict, and the resulting international response have heightened such risks. While Wesco’s business and operations have not been materially adversely affected thus far, the situation remains unstable and uncertain, and we are unable to predict the possible effects on us should the conflict escalate or be further prolonged.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.

The following table sets forth all issuer purchases of common stock during the three months ended September 30, 2022:

Period	Total Number of Shares Purchased (1)	Average Price Paid Per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Approximate Dollar Value of Shares That May Yet be Purchased Under the Plans or Programs
July 1 – July 31, 2022	58,400	$	105.86	—	$	—
August 1 – August 31, 2022	6,363	$	134.93	—	$	—
September 1 – September 30, 2022	3,842	$	129.98	—	$	—
Total	68,605	$	109.91	—	$	—

(1)    These shares were surrendered by stock-based compensation plan participants to satisfy tax withholding obligations arising from the exercise of stock-settled stock appreciation rights, and vesting of restricted stock units and performance-based awards.

Item 6.    Exhibits.

(a)Exhibits

(31)    Rule 13a-14(a)/15d-14(a) Certifications

(1) Certification of Chief Executive Officer pursuant to Rules 13a-14(a) promulgated under the Exchange Act.

(2) Certification of Chief Financial Officer pursuant to Rules 13a-14(a) promulgated under the Exchange Act.

(32)    Section 1350 Certifications

(1) Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

(2) Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

101.INS    XBRL Instance Document.

101.SCH    XBRL Taxonomy Extension Schema Document.

101.CAL    XBRL Taxonomy Extension Calculation Linkbase Document.

101.DEF    XBRL Taxonomy Extension Definition Linkbase Document.

101.LAB    XBRL Taxonomy Extension Label Linkbase Document.

101.PRE    XBRL Taxonomy Extension Presentation Linkbase Document.

104    Cover Page Interactive Data File (embedded within the Inline XBRL document)

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

WESCO International, Inc.

(Registrant)

November 4, 2022	By:	/s/ David S. Schulz
(Date)		David S. Schulz
		Executive Vice President and Chief Financial Officer
		(Principal Financial Officer)

November 4, 2022	By:	/s/ Matthew S. Kulasa
(Date)		Matthew S. Kulasa
		Senior Vice President, Corporate Controller and Chief Accounting Officer
		(Principal Accounting Officer)

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EX-31.1

Exhibit 31.1

CERTIFICATION

     I, John J. Engel, certify that:

     1. I have reviewed this quarterly report on Form 10-Q of WESCO International, Inc.;

     2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

     3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

     4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

     (a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

     (b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

     (c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

     (d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

     5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

     (a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

     (b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:	November 4, 2022	By:	/s/ John J. Engel
			John J. Engel
			Chairman, President and Chief Executive Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

     I, David S. Schulz, certify that:

     1. I have reviewed this quarterly report on Form 10-Q of WESCO International, Inc.;

     2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

     3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

     4. The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

     (a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

     (b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

     (c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

     (d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

     5. The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

     (a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

     (b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date:	November 4, 2022	By:	/s/ David S. Schulz
			David S. Schulz
			Executive Vice President and Chief Financial Officer

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of WESCO International, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2022, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, in the capacity and on the date indicated below, hereby certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to his knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operation of the Company. 

Date:	November 4, 2022	By:	/s/ John J. Engel
			John J. Engel
			Chairman, President and Chief Executive Officer

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of WESCO International, Inc. (the “Company”) on Form 10-Q for the period ended September 30, 2022, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), the undersigned, in the capacity and on the date indicated below, hereby certifies pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to his knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operation of the Company. 

Date:	November 4, 2022	By:	/s/ David S. Schulz
			David S. Schulz
			Executive Vice President and Chief Financial Officer

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COVER PAGE - shares	9 Months Ended
	Sep. 30, 2022	Nov. 03, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2022
Document Transition Report	false
Entity File Number	001-14989
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	25-1723342
Entity Address, Address Line One	225 West Station Square DriveSuite 700
Entity Address, City or Town	Pittsburgh,
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	15219
City Area Code	412
Local Phone Number	454-2200
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Registrant Name	WESCO International, Inc.
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Current Reporting Status	Yes
Entity Central Index Key	0000929008
Entity Common Stock, Shares Outstanding		50,843,668
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		50,843,668
Common Class A [Member]
Cover [Abstract]
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	WCC
Security Exchange Name	NYSE
Entity Listings [Line Items]
Title of 12(b) Security	Common Stock, par value $.01 per share
Trading Symbol	WCC
Security Exchange Name	NYSE
Series A Preferred Stock [Member]
Cover [Abstract]
Title of 12(b) Security	Depositary Shares, each representing a 1/1,000th interest in a share of Series A Fixed-Rate Reset Cumulative Perpetual Preferred Stock
Trading Symbol	WCC PR A
Security Exchange Name	NYSE
Entity Listings [Line Items]
Title of 12(b) Security	Depositary Shares, each representing a 1/1,000th interest in a share of Series A Fixed-Rate Reset Cumulative Perpetual Preferred Stock
Trading Symbol	WCC PR A
Security Exchange Name	NYSE

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CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	$ 234,083	$ 212,583
Accounts Receivable, after Allowance for Credit Loss, Current	3,622,067	2,957,613
Accounts and Other Receivables, Net, Current	388,748	375,885
Inventories, net	3,490,121	2,666,219
Prepaid expenses and other current assets	162,068	137,811
Assets, Current	7,897,087	6,350,111
Property, buildings and equipment, net of accumulated depreciation of $229,041 and $213,758 in 2014 and 2013, respectively	372,083	379,012
Operating Lease, Right-of-Use Asset	575,159	530,863
Intangible assets, net	1,853,451	1,944,141
Goodwill	3,123,430	3,208,333
Other assets	259,354	205,239
Assets	14,080,564	12,617,699
Accounts payable	2,578,741	2,140,251
Accrued payroll and benefit costs	239,309	314,962
Current portion of long-term debt	69,295	9,528
Other Liabilities, Current	680,227	585,067
Liabilities, Current	3,567,572	3,049,808
Total long-term debt	5,192,816	4,701,542
Operating Lease, Liability, Noncurrent	455,356	414,248
Deferred Income Tax Liabilities, Net	443,245	437,444
Other Liabilities, Noncurrent	229,629	238,446
Liabilities	9,888,618	8,841,488
Commitments and Contingencies
Additional capital	1,993,709	1,969,332
Retained earnings	$ 3,590,688	$ 3,004,690
Treasury stock, shares (in shares)	22,026,044	22,026,922
Treasury stock, at cost; 22,026,044 and 22,026,922 shares in 2022 and 2021, respectively	$ (957,805)	$ (956,188)
Accumulated other comprehensive income	(430,500)	(236,035)
Total WESCO International, Inc. stockholders' equity	4,196,820	3,782,524
Noncontrolling interest	(4,874)	(6,313)
Total stockholders’ equity	4,191,946	3,776,211
Liabilities and Equity	$ 14,080,564	$ 12,617,699
Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, shares issued (in shares)	0	0
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding	$ 0	$ 0
Series A Preferred Stock [Member]
Preferred stock, par value (in dollars per share)	$ 0.01
Preferred stock, shares authorized (in shares)	25,000
Preferred stock, shares outstanding (in shares)	21,612
Preferred stock, shares issued (in shares)	21,612	21,612
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding	$ 0	$ 0
Common Stock [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	210,000,000	210,000,000
Common stock, shares, issued (in shares)	68,523,468	68,162,297
Common stock, shares outstanding (in shares)	50,836,855	50,474,806
Common stock	$ 685	$ 682
Common Class B [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	20,000,000	20,000,000
Common stock, shares, issued (in shares)	4,339,431	4,339,431
Common stock, shares outstanding (in shares)	0	0
Common stock	$ 43	$ 43

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CONSOLIDATED BALANCE SHEETS (parenthetical items) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Accounts Receivable, Allowance for Credit Loss, Current	$ 46,663	$ 41,723
Accumulated depreciation	406,960	365,345
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	$ 60,765	$ 70,572

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CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Gross Profit [Abstract]
Revenues	$ 5,445,916	$ 4,728,325	$ 15,861,622	$ 13,365,592
Cost of goods sold	4,241,401	3,720,332	12,418,561	10,581,406
Operating Expenses [Abstract]
Selling, general and administrative expense	760,200	721,795	2,251,162	2,057,952
Depreciation and amortization	42,723	56,732	135,569	144,645
Income from operations	401,592	229,466	1,056,330	581,589
Nonoperating Income (Expense)	75,057	69,720	207,155	207,683
Other Nonoperating Income (Expense)	688	(5,320)	3,007	(8,929)
Income before income taxes	325,847	165,066	846,168	382,835
Provision for income taxes	85,637	44,870	203,178	84,201
Net income	240,210	120,196	642,990	298,634
Net (loss) income attributable to noncontrolling interest	608	600	1,439	665
Net income attributable to WESCO International, Inc.	239,602	119,596	641,551	297,969
Preferred Stock Dividends, Income Statement Impact	14,352	14,352	43,056	43,056
Net Income (Loss) Available to Common Stockholders, Basic	225,250	105,244	598,495	254,913
Comprehensive Income:
Foreign currency translation adjustment	(146,732)	(50,277)	(194,465)	(12,217)
Comprehensive income attributable to WESCO International, Inc.	$ 78,518	$ 54,967	$ 404,030	$ 242,696
Basic (in dollars per share)	$ 4.43	$ 2.09	$ 11.80	$ 5.07
Diluted (in dollars per share)	$ 4.30	$ 2.02	$ 11.42	$ 4.91

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating Activities:
Net income	$ 642,990	$ 298,634
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	135,569	144,645
Stock-based compensation expense	34,446	22,784
Amortization of Debt Issuance Costs and Discounts	11,610	15,290
Gain (Loss) on Disposition of Business	0	(8,927)
Deferred income taxes	7,246	(5,340)
Other operating activities, net	4,237	8,604
Changes in assets and liabilities
Increase (Decrease) in Accounts Receivable	737,639	521,491
Increase (Decrease) in Accounts and Other Receivables	(15,097)	(84,326)
Inventories, net	(886,328)	(428,405)
Increase (Decrease) in Other Operating Assets	(101,476)	19,299
Accounts payable	479,645	550,858
Accrued payroll and benefit costs	(88,420)	65,136
Other current and noncurrent liabilities	102,596	95,909
Net cash provided by operating activities	(410,621)	172,670
Investing Activities:
Capital expenditures	(59,366)	(25,170)
Proceeds from Divestiture of Businesses, Net of Cash Divested	0	56,010
Other investing activities	2,159	5,766
Net cash used in investing activities	(57,207)	36,606
Financing Activities:
Proceeds from (Repayments of) Short-term Debt	1,324	(10,288)
Proceeds from issuance of long-term debt	3,140,953	2,470,306
Repayments of Other Long-term Debt	2,592,996	1,935,655
Payments for Repurchase of Common Stock	(24,963)	(20,784)
Payments of Dividends	(43,056)	(43,056)
Other financing activities, net	(1,678)	(14,174)
Net cash used in financing activities	477,251	(410,204)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	21,500	(197,336)
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	140,668	141,594
Income Taxes Paid	219,826	53,759
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	170,498	120,384
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations	12,077	3,592
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	234,083	251,799
Payments of Debt Issuance Costs	2,333	1,849
5.375% Senior Notes due 2021
Financing Activities:
Repayments of Senior Debt	0	500,000
Repayments of Senior Debt	0	500,000
5.375% Senior Notes due 2024
Financing Activities:
Repayments of Senior Debt	0	354,704
Repayments of Senior Debt	$ 0	$ 354,704

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Statement - USD ($) $ in Thousands	Total	Common Class B [Member]	Common Stock [Member]	Series A Preferred Stock [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Additional Paid-in Capital [Member]
Common stock		$ 43	$ 676
Common Stock, Shares, Issued		4,339,431	67,596,515
Additional capital	$ 1,942,810
Retained Earnings (Accumulated Deficit)	2,601,662
Treasury Stock, Value	$ (938,335)
ERROR in label resolution.	(21,870,961)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (7,333)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(263,134)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)			$ 2				$ (1,421)
APIC, Share-based Payment Arrangement, Recognition and Exercise	(38)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	5,954
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ 0					$ 617	$ 2,209
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			165,641				15,330
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(35,289)
Net Income (Loss) Attributable to Parent	59,178
Dividends, Preferred Stock	(14,352)
Net Income (Loss) Attributable to Noncontrolling Interest						$ (24)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					$ 16,841
Net Income (Loss) Attributable to Parent	297,969
Net Income (Loss) Attributable to Noncontrolling Interest	665
Common stock		$ 43	$ 678
Common Stock, Shares, Issued		4,339,431	67,726,867
Additional capital	1,946,517
Retained Earnings (Accumulated Deficit)	2,645,871
Treasury Stock, Value	$ (939,756)
ERROR in label resolution.	(21,886,291)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (7,357)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(246,293)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)			$ 2				$ (7,942)
APIC, Share-based Payment Arrangement, Recognition and Exercise	(1)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	7,225
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ 0					49	88
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			194,615				74,698
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(1,520)
Net Income (Loss) Attributable to Parent	119,195
Dividends, Preferred Stock	(14,352)
Net Income (Loss) Attributable to Noncontrolling Interest						89
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					21,219
Common stock		$ 43	$ 680
Common Stock, Shares, Issued		4,339,431	67,919,962
Additional capital	1,953,653
Retained Earnings (Accumulated Deficit)	2,750,665
Treasury Stock, Value	$ (947,698)
ERROR in label resolution.	(21,960,989)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (7,268)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(225,074)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)			$ 2				$ (2,306)
APIC, Share-based Payment Arrangement, Recognition and Exercise	(2)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	9,605
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ (1)					4,162	1,887
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			187,770				19,858
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(58,214)
Net Income (Loss) Attributable to Parent	119,596
Dividends, Preferred Stock	(14,352)
Net Income (Loss) Attributable to Noncontrolling Interest	600					600
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					(50,277)
Common stock		$ 43	$ 681
Common Stock, Shares, Issued		4,339,431	68,049,518
Additional capital	1,961,369
Retained Earnings (Accumulated Deficit)	2,851,747
Treasury Stock, Value	$ (950,004)
ERROR in label resolution.	(21,980,847)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (6,668)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(275,351)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612
Common stock		$ 43	$ 682
Common Stock, Shares, Issued		4,339,431	68,162,297
Additional capital	1,969,332
Retained Earnings (Accumulated Deficit)	3,004,690
Treasury Stock, Value	$ (956,188)
ERROR in label resolution.	(22,026,922)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (6,313)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(236,035)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)			$ 4				$ (587)
APIC, Share-based Payment Arrangement, Recognition and Exercise	(10)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	8,911
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ (2)					8,136	7,832
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			365,833				858
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(129,869)
Net Income (Loss) Attributable to Parent	181,243
Dividends, Preferred Stock	(14,352)
Net Income (Loss) Attributable to Noncontrolling Interest						388
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					31,640
Net Income (Loss) Attributable to Parent	641,551
Net Income (Loss) Attributable to Noncontrolling Interest	1,439
Common stock		$ 43	$ 684
Common Stock, Shares, Issued		4,339,431	68,398,261
Additional capital	1,970,401
Retained Earnings (Accumulated Deficit)	3,163,445
Treasury Stock, Value	$ (956,775)
ERROR in label resolution.	(22,027,780)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (5,925)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(204,395)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)			$ 0				$ (311)
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	15,823
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ 0					40
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			11,648				2,301
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(908)
Net Income (Loss) Attributable to Parent	220,706
Dividends, Preferred Stock	(14,352)
Stockholders' Equity, Other			$ 10				$ 3	1,177	(257)
Net Income (Loss) Attributable to Noncontrolling Interest						443
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					(79,373)
Common stock		$ 43	$ 694
Common Stock, Shares, Issued		4,339,431	68,409,001
Additional capital	1,985,967
Retained Earnings (Accumulated Deficit)	3,370,936
Treasury Stock, Value	$ (957,083)
ERROR in label resolution.	(22,030,081)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (5,482)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(283,768)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)			$ 2				$ (722)
APIC, Share-based Payment Arrangement, Recognition and Exercise	38
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	9,712
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ (1)					4,411	2,023
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			174,996				4,037
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(60,529)
Net Income (Loss) Attributable to Parent	239,602
Dividends, Preferred Stock	(14,352)
Stockholders' Equity, Other			$ (10)					$ (1,087)	$ 15
Net Income (Loss) Attributable to Noncontrolling Interest	608					$ 608
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					$ (146,732)
Common stock		$ 43	$ 685
Common Stock, Shares, Issued		4,339,431	68,523,468
Additional capital	1,993,709
Retained Earnings (Accumulated Deficit)	3,590,688
Treasury Stock, Value	$ (957,805)
ERROR in label resolution.	(22,026,044)
Stockholders' Equity Attributable to Noncontrolling Interest	$ (4,874)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (430,500)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0
Preferred stock, shares issued (in shares)				21,612

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ORGANIZATION	9 Months Ended
	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION	WESCO International, Inc. ("Wesco International") and its subsidiaries (collectively, “Wesco” or the "Company"), headquartered in Pittsburgh, Pennsylvania, is a leading provider of business-to-business distribution, logistics services and supply chain solutions.

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ACCOUNTING POLICIES

9 Months Ended

Sep. 30, 2022

Accounting Policies [Abstract]

ACCOUNTING POLICIES

Basis of Presentation

The accompanying unaudited Condensed Consolidated Financial Statements of Wesco have been prepared in accordance with Rule 10-01 of Regulation S-X of the Securities and Exchange Commission (the “SEC”). The unaudited condensed consolidated financial information should be read in conjunction with the audited Consolidated Financial Statements and Notes thereto included in WESCO International, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2021, as filed with the SEC on February 25, 2022. The Condensed Consolidated Balance Sheet at December 31, 2021 was derived from the audited Consolidated Financial Statements as of that date, but does not include all of the disclosures required by accounting principles generally accepted in the United States of America.

The unaudited Condensed Consolidated Balance Sheet as of September 30, 2022, the unaudited Condensed Consolidated Statements of Income and Comprehensive Income and the unaudited Condensed Consolidated Statements of Stockholders' Equity for the three and nine months ended September 30, 2022, and 2021, and the unaudited Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2022, and 2021, respectively, in the opinion of management, have been prepared on the same basis as the audited Consolidated Financial Statements and include all adjustments necessary for the fair statement of the results of the interim periods presented herein. All adjustments reflected in the unaudited condensed consolidated financial information are of a normal recurring nature unless indicated. The results for the interim periods presented herein are not necessarily indicative of the results to be expected for the full year.

Recently Adopted and Recently Issued Accounting Standards

In March 2020, the Financial Accounting Standards Board (the "FASB") issued Accounting Standards Update ("ASU") 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The amendments in this ASU are effective for all entities as of March 12, 2020 through December 31, 2022. The Company adopted this ASU during the first quarter of 2022 in connection with amending Wesco's credit facilities, as disclosed in Note 7, "Debt". The replacement of London Interbank Offered Rate ("LIBOR") and the related adoption of the optional guidance under this accounting standard did not have a material impact on the Company's consolidated financial statements and notes thereto.

In October 2021, the FASB issued ASU 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which requires contract assets and contract liabilities acquired in a business combination to be recognized and measured by the acquirer on the acquisition date in accordance with ASC Topic 606, Revenue from Contracts with Customers, as if the acquirer had originated the contracts. The amendments in this ASU are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Management is currently evaluating the impact that the adoption of this accounting standard will have on its consolidated financial statements and notes thereto.

In September 2022, the FASB issued ASU 2022-04, Supplier Finance Programs (Subtopic 405-50): Disclosure of Supplier Finance Program Obligations, which requires that a buyer in a supplier finance program disclose sufficient information about the program to allow a user of financial statements to understand the program's nature, activity during the period, changes from period to period, and potential magnitude. The amendments in this ASU are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, except for the amendment on rollforward information, which is effective for fiscal years beginning after December 15, 2023. Early adoption is permitted. Management is currently evaluating the impact that the adoption of this accounting standard will have on its consolidated financial statements and notes thereto.

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.

New Accounting Pronouncements and Changes in Accounting Principles [Text Block]

Recently Adopted and Recently Issued Accounting Standards

In March 2020, the Financial Accounting Standards Board (the "FASB") issued Accounting Standards Update ("ASU") 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The amendments in this ASU are effective for all entities as of March 12, 2020 through December 31, 2022. The Company adopted this ASU during the first quarter of 2022 in connection with amending Wesco's credit facilities, as disclosed in Note 7, "Debt". The replacement of London Interbank Offered Rate ("LIBOR") and the related adoption of the optional guidance under this accounting standard did not have a material impact on the Company's consolidated financial statements and notes thereto.

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REVENUE (Notes)

9 Months Ended

Sep. 30, 2022

Revenue from Contract with Customer [Abstract]

Revenue from Contract with Customer

3. REVENUE

Wesco distributes products and provides services to customers globally in various end markets within its business segments. The segments, which consist of EES, CSS and UBS, operate in the United States, Canada and various other international countries.

The following tables disaggregate Wesco’s net sales by segment and geography for the periods presented:

	Three Months Ended				Nine Months Ended
	September 30				September 30
(In thousands)	2022		2021		2022		2021
Electrical & Electronic Solutions	$	2,234,771	$	1,982,485	$	6,654,883	$	5,626,309
Communications & Security Solutions	1,602,459		1,488,689		4,638,631		4,200,424
Utility & Broadband Solutions	1,608,686		1,257,151		4,568,108		3,538,859
Total by segment	$	5,445,916	$	4,728,325	$	15,861,622	$	13,365,592

	Three Months Ended				Nine Months Ended
	September 30				September 30
(In thousands)	2022		2021		2022		2021
United States	$	4,050,924	$	3,407,437	$	11,745,090	$	9,656,183
Canada	765,281		709,507		2,288,146		2,020,395
Other International(1)	629,711		611,381		1,828,386		1,689,014
Total by geography(2)	$	5,445,916	$	4,728,325	$	15,861,622	$	13,365,592

(1)    No individual country's net sales are greater than 10% of total net sales.

(2)    Wesco attributes revenues from external customers to individual countries on the basis of point of sale.

Due to the terms of certain contractual arrangements, Wesco bills or receives payment from its customers in advance of satisfying the respective performance obligation. Such advance billings or payments are recorded as deferred revenue and recognized as revenue when the performance obligation has been satisfied and control has transferred to the customer, which is generally upon shipment. Deferred revenue is usually recognized within a year or less from the date of the advance billing or payment. At September 30, 2022 and December 31, 2021, $55.5 million and $35.5 million, respectively, of deferred revenue was recorded as a component of other current liabilities in the Condensed Consolidated Balance Sheets.

The Company also has certain long-term contractual arrangements where revenue is recognized over time based on the cost-to-cost input method. As of September 30, 2022 and December 31, 2021, the Company had contract assets of $38.6 million and $33.4 million, respectively, resulting from arrangements where the amount of revenue recognized exceeded the amount billed to the customer. Contract assets are recorded in the Condensed Consolidated Balance Sheets as a component of prepaid expenses and other current assets.

Wesco’s revenues are adjusted for variable consideration, which includes customer volume rebates, returns and discounts. Wesco measures variable consideration by estimating expected outcomes using analysis and inputs based upon historical data, as well as current and forecasted information. Variable consideration is reviewed by management on a monthly basis and revenue is adjusted accordingly. Variable consideration reduced revenue for the three months ended September 30, 2022 and 2021 by approximately $120.5 million and $85.8 million, respectively, and by approximately $324.1 million and $246.9 million for the nine months ended September 30, 2022 and 2021, respectively. The variable consideration for the three and nine months ended September 30, 2021 reflect adjustments that reduced the previously disclosed amounts by $9.7 million and $27.8 million, respectively. As of September 30, 2022 and December 31, 2021, the Company's estimated product return obligation was $45.5 million and $38.8 million, respectively.

Billings to customers for shipping and handling are recognized in net sales. Wesco has elected to recognize shipping and handling costs as a fulfillment cost. Shipping and handling costs recorded as a component of selling, general and administrative expenses totaled $77.9 million and $63.5 million for the three months ended September 30, 2022 and 2021, respectively, and $222.0 million and $179.5 million for the nine months ended September 30, 2022 and 2021, respectively

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GOODWILL (Notes)

9 Months Ended

Sep. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets Disclosure

Goodwill

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

	Nine Months Ended
	September 30, 2022
	EES		CSS		UBS		Total
	(In thousands)
Beginning balance, January 1	$	860,958	$	1,121,712	$	1,225,663	$	3,208,333
Foreign currency exchange rate changes	(44,301)		(14,449)		(26,153)		(84,903)
Ending balance, September 30	$	816,657	$	1,107,263	$	1,199,510	$	3,123,430

Intangible Assets

The components of intangible assets are as follows:

		As of
		September 30, 2022						December 31, 2021
	Life (in years)	Gross Carrying Amount (1)		Accumulated Amortization (1)		Net Carrying Amount		Gross Carrying Amount (1)		Accumulated Amortization (1)		Net Carrying Amount
Intangible assets:		(In thousands)
Trademarks	Indefinite	$	791,228	$	—	$	791,228	$	795,065	$	—	$	795,065
Customer relationships	10 - 20	1,400,841		(352,638)		1,048,203		1,431,251		(308,180)		1,123,071
Distribution agreements	15 - 19	29,212		(23,936)		5,276		29,212		(22,714)		6,498
Trademarks	5 - 12	15,543		(6,799)		8,744		38,758		(20,058)		18,700
Non-compete agreements	2	—		—		—		4,300		(3,493)		807
		$	2,236,824	$	(383,373)	$	1,853,451	$	2,298,586	$	(354,445)	$	1,944,141

(1)    Excludes the original cost and related accumulated amortization of fully-amortized intangible assets.

Amortization expense related to intangible assets totaled $21.0 million and $37.1 million for the three months ended September 30, 2022 and 2021, respectively, and $71.4 million and $85.8 million for the nine months ended September 30, 2022 and 2021, respectively.

The following table sets forth the remaining estimated amortization expense for intangible assets for the next five years and thereafter:

For the year ending December 31,	(In thousands)
2022	$	20,467
2023	81,838
2024	79,445
2025	76,389
2026	71,073
Thereafter	733,011

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STOCK-BASED COMPENSATION (Notes)

9 Months Ended

Sep. 30, 2022

Share-Based Payment Arrangement [Abstract]

STOCK-BASED COMPENSATION

Wesco’s stock-based compensation awards are comprised of stock options, stock-settled stock appreciation rights, restricted stock units and performance-based awards. 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 stock appreciation rights is determined using the Black-Scholes model. The fair value of restricted stock units and performance-based awards with performance conditions is determined by the grant-date closing price of Wesco’s common stock. The forfeiture assumption is based on Wesco’s historical participant behavior that is reviewed on an annual basis. No dividends are assumed. For stock options and stock-settled stock appreciation rights that are exercised, and for restricted stock units and performance-based awards that vest, shares are issued out of Wesco's outstanding common stock.

Stock options and stock-settled stock appreciation rights vest ratably over a three-year period and terminate on the tenth anniversary of the grant date unless terminated sooner under certain conditions. Restricted stock unit awards granted in February 2020 and prior vest based on a minimum time period of three years. The special award described below vests in tranches. Restricted stock units awarded in 2022 and 2021 vest ratably over a three-year period on each of the first, second and third anniversaries of the grant date. Vesting of performance-based awards is based on a three-year performance period, and the number of shares earned, if any, depends on the attainment of certain performance levels. Outstanding awards would vest upon the consummation of a change in control transaction with performance-based awards vesting at the target level.

On July 2, 2020, a special award of restricted stock units was granted to certain officers of the Company. These awards vest in tranches of 30% on each of the first and second anniversaries of the grant date and 40% on the third anniversary of the grant date, subject, in each case, to continued employment through the applicable anniversary date.

Performance-based awards granted in 2022, 2021 and 2020 are based on two equally-weighted performance measures: the three-year average growth rate of Wesco's net income attributable to common stockholders and the three-year cumulative return on net assets. These awards are accounted for as awards with performance conditions; compensation cost is recognized over the performance period based upon Wesco's determination of whether it is probable that the performance targets will be achieved.

During the three and nine months ended September 30, 2022 and 2021, Wesco granted the following stock options, stock-settled stock appreciation rights, restricted stock units and performance-based awards at the following weighted-average fair values:

	Three Months Ended				Nine Months Ended
	September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021
Stock options granted	3,249		—		92,799		—
Weighted-average fair value	$	54.13	$	—	$	57.15	$	—
Stock-settled stock appreciation rights granted	—		—		—		139,592
Weighted-average fair value	$	—	$	—	$	—	$	33.19
Restricted stock units granted	1,669		6,897		226,615		314,480
Weighted-average fair value	$	112.33	$	108.76	$	122.04	$	77.81
Performance-based awards granted	—		—		83,991		122,812
Weighted-average fair value	$	—	$	—	$	122.09	$	76.76

The fair values of stock options and stock-settled stock appreciation rights, as disclosed in the table above, were estimated using the following weighted-average assumptions in the respective periods:

	Three Months Ended			Nine Months Ended
	September 30, 2022		September 30, 2021	September 30, 2022		September 30, 2021
Risk free interest rate	2.9	%	n/a	2.0	%	0.8	%
Expected life (in years)	7		n/a	7		7
Expected volatility	44	%	n/a	43	%	41	%

The risk-free interest rate is based on the U.S. Treasury Daily Yield Curve as of the grant date. The expected life is based on historical exercise experience and the expected volatility is based on the volatility of the Company's daily stock price over the expected life preceding the grant date of the award.

The following table sets forth a summary of stock options for the nine months ended September 30, 2022:

	Awards	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value (In thousands)
Outstanding at December 31, 2021	—	$	—
Granted	92,799	121.58
Exercised	—	—
Forfeited	(5,452)	122.09
Outstanding at September 30, 2022	87,347	$	121.55	9.3	$	39
Exercisable at September 30, 2022	879	$	122.09	0.9	$	—

The following table sets forth a summary of stock-settled stock appreciation rights for the nine months ended September 30, 2022:

	Awards	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value (In thousands)
Outstanding at December 31, 2021	1,370,388	$	62.09
Granted	—	—
Exercised	(101,076)	61.79
Forfeited	(8,891)	73.35
Outstanding at September 30, 2022	1,260,421	$	62.03	5.4	$	72,283
Exercisable at September 30, 2022	1,095,626	$	61.92	5.1	$	62,959

For the nine months ended September 30, 2022, the aggregate intrinsic value of stock-settled stock appreciation rights exercised during such period was $7.3 million.

The following table sets forth a summary of time-based restricted stock units for the nine months ended September 30, 2022:

	Awards	Weighted- Average Fair Value
Unvested at December 31, 2021	974,162	$	53.48
Granted	226,615	122.04
Vested	(382,954)	53.23
Forfeited	(35,118)	62.58
Unvested at September 30, 2022	782,705	$	73.04

The following table sets forth a summary of performance-based awards for the nine months ended September 30, 2022:

	Awards	Weighted- Average Fair Value
Unvested at December 31, 2021	380,819	$	59.23
Granted	83,991	122.09
Vested	(115,394)	54.64
Forfeited	(14,087)	60.75
Unvested at September 30, 2022	335,329	$	75.26

Wesco recognized $9.7 million and $9.6 million of non-cash stock-based compensation expense for the three months ended September 30, 2022 and 2021, respectively, and $34.4 million and $22.8 million for the nine months ended September 30, 2022 and 2021, respectively, which is included in selling, general and administrative expenses for all such periods. As of September 30, 2022, there was $58.2 million of total unrecognized compensation expense related to non-vested stock-based compensation arrangements for all awards previously made of which approximately $10.7 million is expected to be recognized over the remainder of 2022, $30.8 million in 2023, $14.9 million in 2024 and $1.8 million in 2025.

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EARNINGS PER SHARE

9 Months Ended

Sep. 30, 2022

Earnings Per Share [Abstract]

EARNINGS PER SHARE

Basic earnings per share is computed by dividing net income attributable to common stockholders by the weighted-average number of common shares outstanding during the periods. Diluted earnings per share is computed by dividing net income attributable to common stockholders 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 equity awards.

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

	Three Months Ended				Nine Months Ended
	September 30				September 30
(In thousands, except per share data)	2022		2021		2022		2021
Net income attributable to WESCO International, Inc.	$	239,602	$	119,596	$	641,551	$	297,969
Less: Preferred stock dividends	14,352		14,352		43,056		43,056
Net income attributable to common stockholders	$	225,250	$	105,244	$	598,495	$	254,913
Weighted-average common shares outstanding used in computing basic earnings per share	50,815		50,386		50,711		50,252
Common shares issuable upon exercise of dilutive equity awards	1,574		1,677		1,675		1,644
Weighted-average common shares outstanding and common share equivalents used in computing diluted earnings per share	52,389		52,063		52,386		51,896
Earnings per share attributable to common stockholders
Basic	$	4.43	$	2.09	$	11.80	$	5.07
Diluted	$	4.30	$	2.02	$	11.42	$	4.91

The computation of diluted earnings per share attributable to common stockholders excludes stock-based awards that would have had an antidilutive effect on earnings per share. For the three and nine months ended September 30, 2022, there were 88,896 and 88,071 antidilutive shares, respectively

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DEBT (Notes)

9 Months Ended

Sep. 30, 2022

Debt Instrument [Line Items]

Debt Disclosure [Text Block]

7. DEBT

The following table sets forth Wesco's outstanding indebtedness:

	As of
	September 30, 2022		December 31, 2021
	(In thousands)
International lines of credit	$	6,659	$	7,354
Accounts Receivable Securitization Facility	1,525,000		1,270,000
Revolving Credit Facility	883,097		596,959
5.50% Anixter Senior Notes due 2023	58,636		58,636
6.00% Anixter Senior Notes due 2025	4,173		4,173
7.125% Senior Notes due 2025	1,500,000		1,500,000
7.250% Senior Notes due 2028, less debt discount of $7,155 and $8,088 in 2022 and 2021, respectively	1,317,845		1,316,912
Finance lease obligations	19,872		18,563
Total debt	5,315,282		4,772,597
Plus: Fair value adjustment to the Anixter Senior Notes	439		957
Less: Unamortized debt issuance costs	(53,610)		(62,484)
Less: Short-term debt and current portion of long-term debt(1)	(69,295)		(9,528)
Total long-term debt	$	5,192,816	$	4,701,542

(1)    As of September 30, 2022, short-term debt and current portion of long-term debt includes the $58.6 million aggregate principal amount of the Company's 5.50% Anixter Senior Notes due 2023, which mature on March 1, 2023.

Accounts Receivable Securitization Facility

On March 1, 2022, WESCO Distribution, Inc. (“Wesco Distribution”) amended its accounts receivable securitization facility (the “Receivables Facility”) pursuant to the terms and conditions of a Fourth Amendment to Fifth Amended and Restated Receivables Purchase Agreement (the “Fourth Receivables Amendment”), by and among WESCO Receivables Corp., Wesco Distribution, the various purchaser groups from time to time party thereto and PNC Bank, National Association, as administrator. The Fourth Receivables Amendment modified the receivables purchase agreement entered into on June 22, 2020 (the “Receivables Purchase Agreement”). The Fourth Receivables Amendment, among other things, (i) increased the purchase limit under the Receivables Facility from $1,300 million to $1,400 million, (ii) increased the aggregate commitment from $1,500 million to $1,750 million under an accordion feature that permits requests to increase the purchase limit, and (iii) extended the maturity date from June 1, 2024 to March 1, 2025. Additionally, the Fourth Receivables Amendment replaced the LIBOR interest rate option with Secured Overnight Financing Rate-based (“SOFR”) interest rate options, including term SOFR and daily simple SOFR, and decreased the interest rate spread from 1.15% to 1.10%. The commitment fee of the Receivables Facility were unchanged.

On August 2, 2022, Wesco Distribution further amended its Receivables Facility pursuant to the terms and conditions of a Fifth Amendment to Fifth Amended and Restated Receivables Purchase Agreement (the “Fifth Receivables Amendment”). The Fifth Receivables Amendment amends the Receivables Purchase Agreement to, among other things, increase the purchase limit under the Receivables Facility from $1,400 million to $1,525 million and to decrease the interest rate spread from 1.10% to 1.05%. The maturity date and commitment fee of the Receivables Facility were unchanged.

Under the Receivables Facility, Wesco Distribution sells, on a continuous basis, an undivided interest in all domestic accounts receivable to Wesco Receivables, a wholly owned special purpose entity (the “SPE”). The SPE sells, without recourse, a senior undivided interest in the receivables to financial institutions for cash while maintaining a subordinated undivided interest in the receivables, in the form of overcollateralization. Since Wesco Distribution maintains control of the transferred receivables, 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. Wesco Distribution 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.

Revolving Credit Facility

On March 1, 2022, Wesco Distribution amended its revolving credit facility (the “Revolving Credit Facility”) pursuant to the terms and conditions of a Second Amendment to Fourth Amended and Restated Credit Agreement (the “Second Revolver Amendment”), by and among Wesco Distribution, as the borrower representative, the other U.S. borrowers party thereto, WESCO Distribution Canada LP, the other Canadian borrowers party thereto, WESCO International, the lenders party thereto and Barclays Bank PLC, as the administrative agent. The Second Revolver Amendment modified the revolving credit facility entered into on June 22, 2020 (the "Revolving Credit Agreement"). The Second Revolver Amendment, among other things, (i) increased the revolving commitments under the Revolving Credit Facility from $1,200 million to $1,350 million, (ii) increased the sub-facility for loans denominated in Canadian dollars from $500 million to $550 million, (iii) increased the capacity to request increases in the aggregate revolving commitments from $400 million to $650 million, (iv) modified certain negative covenants to provide for additional flexibility, and (v) extended the maturity date from June 22, 2025 to March 1, 2027. Additionally, the Second Revolver Amendment replaced the LIBOR-based interest rate option with SOFR-based interest rate options, including term SOFR and daily simple SOFR. The applicable interest rate for borrowings under the Revolving Credit Facility, as amended, includes interest rate spreads based on available borrowing capacity that range from 1.00% to 1.50% for SOFR-based borrowings and from 0.00% to 0.50% for prime rate-based borrowings

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EMPLOYEE BENEFIT PLANS (Notes)

9 Months Ended

Sep. 30, 2022

Retirement Benefits [Abstract]

EMPLOYEE BENEFIT PLANS

8. EMPLOYEE BENEFIT PLANS

Defined Contribution Plans

Wesco Distribution sponsors a defined contribution retirement savings plan for the majority of its U.S. employees (the "WESCO Distribution, Inc. Retirement Savings Plan"). Effective January 1, 2022, the defined contribution plan covering all of Anixter Inc.'s non-union U.S. employees (the "Anixter Inc. Employee Savings Plan") was merged with and into the WESCO Distribution, Inc. Retirement Savings Plan (the "U.S. Defined Contribution Plan Merger"). On December 31, 2021, participant account balances were transferred from the Anixter Inc. Employee Savings Plan to the WESCO Distribution, Inc. Retirement Savings Plan. In connection with the U.S. Defined Contribution Plan Merger, the WESCO Distribution, Inc. Retirement Savings Plan was amended to change the employer matching contribution at an amount equal to 100% of a participant's eligible elective deferrals up to 3% of the participant's eligible compensation and 50% of the next 4% of eligible compensation, and to eliminate discretionary employer contributions.

WESCO Distribution Canada LP, a wholly-owned subsidiary of the Company, sponsors a defined contribution plan covering the current full-time employees of WESCO Distribution Canada LP and part-time employees meeting certain requirements for continuous service, earnings and minimum hours of employment (the "Wesco Canadian Defined Contribution Plan"). Effective January 1, 2022, the defined contribution plan for certain employees of Anixter Canada Inc. and Anixter Power Solutions Canada Inc. (the "Anixter Canadian Defined Contribution Plan") was merged with and into an amended Wesco Canadian Defined Contribution Plan. During the first quarter of 2022, participant account balances were transferred from the Anixter Canadian Defined Contribution Plan to the amended Wesco Canadian Defined Contribution Plan. The amended Wesco Canadian Defined Contribution Plan provides a core employer contribution of 3% of a participant's eligible compensation, plus a matching contribution equal to 50% of a participant's elective contributions up to 4% of eligible compensation (for a maximum total employer contribution equal to 5%). The amended Wesco Canadian Defined Contribution Plan also requires employees of EECOL Electric Corp. hired on or after January 1, 2022 to join this Canadian defined contribution plan, and permits enrollment for those not participating in the defined benefit plan described below.

Wesco incurred charges of $12.4 million and $16.4 million for the three months ended September 30, 2022 and 2021, respectively, and $45.4 million and $49.1 million for the nine months ended September 30, 2022 and 2021, respectively, for all defined contribution plans.

Deferred Compensation Plans

Wesco Distribution sponsors a non-qualified deferred compensation plan (the "Wesco Deferred Compensation Plan") that permits select employees to make pre-tax deferrals of salary and bonus. Employees have the option to transfer balances allocated to their accounts in the Wesco Deferred Compensation Plan into any of the available investment options. The Wesco Deferred Compensation Plan is an unfunded plan. As of September 30, 2022 and December 31, 2021, the Company's obligation under the Wesco Deferred Compensation Plan was $19.6 million and $20.9 million, respectively, which is included in other noncurrent liabilities in the Condensed Consolidated Balance Sheets.

Defined Benefit Plans

Wesco sponsors a contributory defined benefit plan covering substantially all Canadian employees of EECOL Electric Corp., a wholly-owned subsidiary of the Company (the "EECOL Plan") and a Supplemental Executive Retirement Plan for certain executives of EECOL Electric Corp. (the "EECOL SERP").

Anixter Inc. sponsors the Anixter Inc. Pension Plan, which was closed to entrants first hired or rehired on or after July 1, 2015, and various defined benefit pension plans covering employees of foreign subsidiaries in Canada and Europe (together with the "EECOL Plan" and "EECOL SERP", the "Foreign Plans"). The majority of the Company's defined benefit pension plans are non-contributory, and with the exception of the U.S. and Canada, cover substantially all full-time employees in their respective countries. Retirement benefits are provided based on compensation as defined in each of the plan agreements. The Anixter Inc. Pension Plan is funded as required by the Employee Retirement Income Security Act of 1974 and the Internal Revenue Service. With the exception of the EECOL SERP, which is an unfunded plan, the Foreign Plans are funded as required by applicable foreign laws.

During the fourth quarter of 2021, the Company adopted certain plan amendments to: (i) freeze the benefits provided under the Anixter Inc. Pension Plan effective December 31, 2021, (ii) close participation in the EECOL Plan and EECOL SERP effective December 31, 2021, and (iii) freeze the benefit accruals under the Pension Plan for Employees of Anixter Canada Inc., the EECOL Plan and the EECOL SERP effective December 31, 2023.

The Company expects to contribute approximately $10.8 million to its Foreign Plans in 2022, of which approximately $9.3 million was contributed during the nine months ended September 30, 2022. The Company does not expect to make a contribution to its domestic qualified pension plan in 2022 due to its overfunded status.

The following tables set forth the components of net periodic pension (benefit) cost for the Company's defined benefit plans:

	Three Months Ended
(In thousands)	September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021
	Domestic Plans				Foreign Plans				Total
Service cost	$	—	$	764	$	2,047	$	3,251	$	2,047	$	4,015
Interest cost	2,083		2,018		2,174		2,465		4,257		4,483
Expected return on plan assets	(3,497)		(4,414)		(4,017)		(4,277)		(7,514)		(8,691)
Recognized actuarial gain(1)	—		—		(179)		103		(179)		103
Net periodic pension (benefit) cost	$	(1,414)	$	(1,632)	$	25	$	1,542	$	(1,389)	$	(90)

	Nine Months Ended
(In thousands)	September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021
	Domestic Plans				Foreign Plans				Total
Service cost	$	—	$	2,291	$	6,318	$	9,791	$	6,318	$	12,082
Interest cost	6,250		6,095		6,742		7,425		12,992		13,520
Expected return on plan assets	(10,491)		(13,241)		(12,468)		(12,898)		(22,959)		(26,139)
Recognized actuarial gain(1)	—		—		(547)		311		(547)		311
Settlement	—		(19)		—		—		—		(19)
Net periodic pension (benefit) cost	$	(4,241)	$	(4,874)	$	45	$	4,629	$	(4,196)	$	(245)

(1)    For the three and nine months ended September 30, 2022 and 2021, no material amounts were reclassified from accumulated other comprehensive income into net income.

The service cost of $2.0 million and $4.0 million for the three months ended September 30, 2022 and 2021, respectively, and $6.3 million and $12.1 million for the nine months ended September 30, 2022 and 2021, respectively, is reported as a component of selling, general and administrative expenses. The other components of net periodic pension (benefit) cost totaling net benefits of $3.4 million and $4.1 million for the three months ended September 30, 2022 and 2021, respectively, and $10.5 million and $12.3 million for the nine months ended September 30, 2022 and 2021, respectively, are presented as components of other non-operating income ("other expense (income), net").

Other Benefits

Prior to its acquisition by Wesco on June 22, 2020, Anixter granted restricted stock units in the ordinary course of business to its employees and directors. These awards, for which vesting did not accelerate solely as a result of the Company's merger with Anixter, were converted into cash-only settled Wesco phantom stock units, which vest ratably over a 3-year period. As of September 30, 2022 and December 31, 2021, the estimated fair value of these awards was $7.9 million and $22.7 million, respectively.

As of September 30, 2022, the Company's liability for these awards is $7.1 million, which is included in accrued payroll and benefit costs in the Condensed Consolidated Balance Sheet. As of December 31, 2021, the Company's liability for these awards was $17.3 million, of which $10.9 million was included in accrued payroll and benefit costs and $6.4 million was a component of other noncurrent liabilities in the Condensed Consolidated Balance Sheet.

The Company recognized compensation expense associated with these awards of $1.8 million and $3.4 million for the three months ended September 30, 2022 and 2021, respectively, and $1.6 million and $9.8 million for the nine months ended September 30, 2022 and 2021, respectively, which is reported as a component of selling, general and administrative expenses.

Compensation Related Costs, General

Other Benefits

Prior to its acquisition by Wesco on June 22, 2020, Anixter granted restricted stock units in the ordinary course of business to its employees and directors. These awards, for which vesting did not accelerate solely as a result of the Company's merger with Anixter, were converted into cash-only settled Wesco phantom stock units, which vest ratably over a 3-year period. As of September 30, 2022 and December 31, 2021, the estimated fair value of these awards was $7.9 million and $22.7 million, respectively.

As of September 30, 2022, the Company's liability for these awards is $7.1 million, which is included in accrued payroll and benefit costs in the Condensed Consolidated Balance Sheet. As of December 31, 2021, the Company's liability for these awards was $17.3 million, of which $10.9 million was included in accrued payroll and benefit costs and $6.4 million was a component of other noncurrent liabilities in the Condensed Consolidated Balance Sheet.

The Company recognized compensation expense associated with these awards of $1.8 million and $3.4 million for the three months ended September 30, 2022 and 2021, respectively, and $1.6 million and $9.8 million for the nine months ended September 30, 2022 and 2021, respectively, which is reported as a component of selling, general and administrative expenses.

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FAIR VALUE (Notes)

9 Months Ended

Sep. 30, 2022

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

9. FAIR VALUE OF FINANCIAL INSTRUMENTS

The Company’s financial instruments primarily consist of cash and cash equivalents, accounts receivable, accounts payable, bank overdrafts, outstanding indebtedness, foreign currency forward contracts, and benefit plan assets. Except for benefit plan assets, outstanding indebtedness and foreign currency forward contracts, the carrying value of the Company’s remaining financial instruments approximates fair value.

The assets of the Company's various defined benefit plans are primarily comprised of common/collective/pool funds (i.e., mutual funds). These funds are valued at the net asset value (NAV) of shares held in the underlying funds. Investments for which fair value is measured using the NAV per share practical expedient are not classified in the fair value hierarchy.

The Company uses a market approach to determine the fair value of its debt instruments, utilizing quoted prices in active markets, interest rates and other relevant information generated by market transactions involving similar instruments. Therefore, the inputs used to measure the fair value of the Company's debt instruments are classified as Level 2 within the fair value hierarchy.

The carrying value of Wesco's debt instruments with fixed interest rates was $2,881.1 million and $2,880.7 million as of September 30, 2022 and December 31, 2021, respectively. The estimated fair value of this debt was $2,866.5 million and $3,118.0 million as of September 30, 2022 and December 31, 2021, respectively. The reported carrying values of Wesco's other debt instruments, including those with variable interest rates, approximated their fair values as of September 30, 2022 and December 31, 2021.

The Company purchases foreign currency forward contracts to minimize the effect of fluctuations in foreign currency-denominated accounts on its earnings. The foreign currency forward contracts are not designated as hedges for accounting purposes. The Company's strategy is to negotiate terms for its derivatives and other financial instruments to be highly effective, such that the change in the value of the derivative offsets the impact of the underlying hedge. Its counterparties to foreign currency forward contracts have investment-grade credit ratings. The Company regularly monitors the creditworthiness of its counterparties to ensure no issues exist that could affect the value of its derivatives.

The Company does not hedge 100% of its foreign currency-denominated accounts. In addition, the results of hedging can vary significantly based on various factors, such as the timing of executing foreign currency forward contracts versus the movement of currencies, as well as fluctuations in the account balances throughout each reporting period. The fair value of foreign currency forward contracts is based on the difference between the contract rate and the current price of a forward contract with an equivalent remaining term. The fair value of foreign currency forward contracts is measured using observable market information. These inputs are considered Level 2 in the fair value hierarchy. At September 30, 2022 and December 31, 2021, foreign currency forward contracts were revalued at then-current foreign exchange rates with the changes in valuation reflected directly in other non-operating income (expense) in the Condensed Consolidated Statements of Income and Comprehensive Income offsetting the transaction gain (loss) recorded on foreign currency-denominated accounts. At September 30, 2022 and December 31, 2021, the gross and net notional amounts of foreign currency forward contracts outstanding were approximately $224.3 million and $188.6 million, respectively. While all of the Company's foreign currency forward contracts are subject to master netting arrangements with its counterparties, assets and liabilities related to these contracts are presented on a gross basis within the Condensed Consolidated Balance Sheets. The gross fair value of assets and liabilities related to foreign currency forward contracts were immaterial.

Derivatives and Fair Value

The Company purchases foreign currency forward contracts to minimize the effect of fluctuations in foreign currency-denominated accounts on its earnings. The foreign currency forward contracts are not designated as hedges for accounting purposes. The Company's strategy is to negotiate terms for its derivatives and other financial instruments to be highly effective, such that the change in the value of the derivative offsets the impact of the underlying hedge. Its counterparties to foreign currency forward contracts have investment-grade credit ratings. The Company regularly monitors the creditworthiness of its counterparties to ensure no issues exist that could affect the value of its derivatives.

The Company does not hedge 100% of its foreign currency-denominated accounts. In addition, the results of hedging can vary significantly based on various factors, such as the timing of executing foreign currency forward contracts versus the movement of currencies, as well as fluctuations in the account balances throughout each reporting period. The fair value of foreign currency forward contracts is based on the difference between the contract rate and the current price of a forward contract with an equivalent remaining term. The fair value of foreign currency forward contracts is measured using observable market information. These inputs are considered Level 2 in the fair value hierarchy. At September 30, 2022 and December 31, 2021, foreign currency forward contracts were revalued at then-current foreign exchange rates with the changes in valuation reflected directly in other non-operating income (expense) in the Condensed Consolidated Statements of Income and Comprehensive Income offsetting the transaction gain (loss) recorded on foreign currency-denominated accounts. At September 30, 2022 and December 31, 2021, the gross and net notional amounts of foreign currency forward contracts outstanding were approximately $224.3 million and $188.6 million, respectively. While all of the Company's foreign currency forward contracts are subject to master netting arrangements with its counterparties, assets and liabilities related to these contracts are presented on a gross basis within the Condensed Consolidated Balance Sheets. The gross fair value of assets and liabilities related to foreign currency forward contracts were immaterial.

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COMMITMENTS AND CONTINGENCIES	9 Months Ended
	Sep. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	From time to time, a number of lawsuits and claims have been or may be asserted against the Company relating to the conduct of its business, including litigation relating to commercial, product and employment matters (including wage and hour). The outcome of any litigation cannot be predicted with certainty, and some lawsuits may be determined adversely to Wesco. However, management does not believe that the ultimate outcome of any such pending matters is likely to have a material adverse effect on Wesco's financial condition or liquidity, although the resolution in any fiscal period of one or more of these matters may have a material adverse effect on Wesco's results of operations for that period.

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INCOME TAXES

9 Months Ended

Sep. 30, 2021

Income Tax Disclosure [Abstract]

INCOME TAXES

The effective tax rate for the three and nine months ended September 30, 2022 was 26.3% and 24.0%, respectively. The effective tax rate for the three and nine months ended September 30, 2021 was 27.2% and 22.0%, respectively. Wesco’s effective tax rate typically differs from the federal statutory income tax rate due to the tax effect of intercompany financing, foreign tax rate differences, the U.S. taxes imposed on foreign income, nondeductible expenses and state income taxes. For the three months ended September 30, 2022 and 2021, the effective tax rate reflects discrete income tax benefits of $3.2 million and $3.3 million, respectively, resulting from the exercise and vesting of stock-based awards. These discrete income tax benefits were offset by discrete income tax expense of $0.8 million and $4.2 million, respectively, resulting from return-to-provision adjustments. The net impact of discrete income tax items was a reduction to the estimated annual effective tax rate of approximately 0.7 percentage points for the three months ended September 30, 2022 and an increase of 0.7 percentage points for the three months ended September 30, 2021. For the nine months ended September 30, 2022 and 2021, the effective tax rate reflects discrete income tax benefits of $13.4 million and $8.3 million, respectively, resulting from reductions to the valuation allowance recorded against foreign tax credit carryforwards, as well as the exercise and vesting of stock-based awards of $9.4 million and $7.8 million, respectively. These discrete income tax benefits were partially offset by discrete income tax expense of $0.8 million and $4.2 million, respectively, resulting from return-to-provision adjustments. The net impact of discrete income tax items was a reduction to the estimated annual effective tax rate in such periods of approximately 2.6 and 3.1 percentage points, respectively.

There have been no material adjustments to liabilities for uncertain tax positions since December 31, 2021.

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Segment Reporting

9 Months Ended

Sep. 30, 2022

Segment Reporting [Abstract]

Segment Reporting Disclosure

12. BUSINESS SEGMENTS

The Company has operating segments comprising three strategic business units consisting of EES, CSS and UBS. These operating segments are equivalent to the Company's reportable segments. The Company's chief operating decision maker evaluates the performance of its operating segments based primarily on net sales, adjusted earnings before interest, taxes, depreciation and amortization ("EBITDA"), and adjusted EBITDA margin percentage.

The Company incurs corporate costs primarily related to treasury, tax, information technology, legal and other centralized functions. The Company also has various corporate assets. Segment assets may not include jointly used assets, but segment results include depreciation expense or other allocations related to those assets. Interest expense and other non-operating items are either not allocated to the segments or reviewed on a segment basis. Corporate expenses and assets not directly identifiable with a reportable segment are reported in the tables below to reconcile the reportable segments to the consolidated financial statements.

(In thousands)	Three Months Ended September 30, 2022
	EES			CSS			UBS			Corporate		Total
Net sales	$	2,234,771		$	1,602,459		$	1,608,686		$	—	$	5,445,916
Adjusted EBITDA	225,764			156,370			186,257			(102,495)		465,896
Adjusted EBITDA Margin %	10.1		%	9.8		%	11.6		%			8.6		%
	Three Months Ended September 30, 2021
(In thousands)	EES			CSS			UBS			Corporate		Total
Net sales	$	1,982,485		$	1,488,689		$	1,257,151		$	—	$	4,728,325
Adjusted EBITDA	173,898			133,701			114,674			(92,013)		330,260
Adjusted EBITDA Margin %	8.8		%	9.0		%	9.1		%			7.0		%

(In thousands)	Nine Months Ended September 30, 2022
	EES			CSS			UBS			Corporate		Total
Net sales	$	6,654,883		$	4,638,631		$	4,568,108		$	—	$	15,861,622
Adjusted EBITDA	653,630			429,452			491,652			(300,256)		1,274,478
Adjusted EBITDA Margin %	9.8		%	9.3		%	10.8		%			8.0		%
	Nine Months Ended September 30, 2021
(In thousands)	EES			CSS			UBS			Corporate		Total
Net sales	$	5,626,309		$	4,200,424		$	3,538,859		$	—	$	13,365,592
Adjusted EBITDA	453,894			355,521			299,030			(252,391)		856,054
Adjusted EBITDA Margin %	8.1		%	8.5		%	8.4		%			6.4		%

The following table sets forth total assets by reportable segment for the periods presented:

	As of
	September 30, 2022
(In thousands)	EES		CSS		UBS		Corporate(1)		Total
Total assets	$	4,541,553	$	4,988,009	$	3,817,459	$	733,543	$	14,080,564
	As of
	December 31, 2021
(In thousands)	EES		CSS		UBS		Corporate(1)		Total
Total assets	$	4,098,335	$	4,601,132	$	3,266,231	$	652,001	$	12,617,699

(1)    Total assets for Corporate primarily consist of cash and cash equivalents, deferred income taxes, fixed assets and right-of-use assets associated with operating leases.

The following tables reconcile net income attributable to common stockholders to adjusted EBITDA and adjusted EBITDA margin % by segment, which are non-GAAP financial measures, for the periods presented:

	Three Months Ended September 30, 2022
(In thousands)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	214,054		$	138,747		$	180,354		$	(307,905)	$	225,250
Net income attributable to noncontrolling interests	200			—			—			408		608
Preferred stock dividends	—			—			—			14,352		14,352
Provision for income taxes	—			—			—			85,637		85,637
Interest expense, net	—			—			—			75,057		75,057
Depreciation and amortization	9,596			15,929			5,859			11,339		42,723
Other (income) expense, net	(1,069)			266			(1,063)			2,554		688
Stock-based compensation expense(1)	2,983			1,428			1,107			2,853		8,371
Merger-related and integration costs	—			—			—			13,210		13,210
Adjusted EBITDA	$	225,764		$	156,370		$	186,257		$	(102,495)	$	465,896
Adjusted EBITDA margin %	10.1		%	9.8		%	11.6		%			8.6		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the three months ended September 30, 2022 excludes $1.3 million as such amount is included in merger-related and integration costs.

	Three Months Ended September 30, 2021
(In thousands)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	155,627		$	107,898		$	108,150		$	(266,431)	$	105,244
Net income attributable to noncontrolling interests	309			—			—			291		600
Preferred stock dividends	—			—			—			14,352		14,352
Provision for income taxes	—			—			—			44,870		44,870
Interest expense, net	—			—			—			69,720		69,720
Depreciation and amortization	16,840			24,723			5,869			9,300		56,732
Other (income) expense, net	(726)			328			22			(4,944)		(5,320)
Stock-based compensation expense(1)	1,848			752			633			5,079		8,312
Merger-related and integration costs	—			—			—			35,750		35,750
Adjusted EBITDA	$	173,898		$	133,701		$	114,674		$	(92,013)	$	330,260
Adjusted EBITDA margin %	8.8		%	9.0		%	9.1		%			7.0		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the three months ended September 30, 2021 excludes $1.3 million as such amount is included in merger-related and integration costs.

	Nine Months Ended September 30, 2022
(In thousands)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	615,547		$	373,073		$	472,119		$	(862,244)	$	598,495
Net income attributable to noncontrolling interests	561			—			—			878		1,439
Preferred stock dividends	—			—			—			43,056		43,056
Provision for income taxes	—			—			—			203,178		203,178
Interest expense, net	—			—			—			207,155		207,155
Depreciation and amortization	32,818			51,916			17,315			33,520		135,569
Other (income) expense, net	(2,646)			716			(452)			5,389		3,007
Stock-based compensation expense(1)	7,350			3,747			2,670			16,612		30,379
Merger-related and integration costs	—			—			—			52,200		52,200
Adjusted EBITDA	$	653,630		$	429,452		$	491,652		$	(300,256)	$	1,274,478
Adjusted EBITDA margin %	9.8		%	9.3		%	10.8		%			8.0		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the nine months ended September 30, 2022 excludes $4.1 million as such amount is included in merger-related and integration costs.

	Nine Months Ended September 30, 2021
(In thousands)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	410,233		$	292,537		$	289,851		$	(737,708)	$	254,913
Net income attributable to noncontrolling interests	158			—			—			507		665
Preferred stock dividends	—			—			—			43,056		43,056
Provision for income taxes	—			—			—			84,201		84,201
Interest expense, net	—			—			—			207,683		207,683
Depreciation and amortization	40,184			60,257			16,545			27,659		144,645
Other (income) expense, net	(1,329)			909			44			(8,553)		(8,929)
Stock-based compensation expense(1)	4,648			1,818			1,517			10,972		18,955
Merger-related and integration costs	—			—			—			119,792		119,792
Net gain on divestitures	—			—			(8,927)			—		(8,927)
Adjusted EBITDA	$	453,894		$	355,521		$	299,030		$	(252,391)	$	856,054
Adjusted EBITDA margin %	8.1		%	8.5		%	8.4		%			6.4		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the nine months ended September 30, 2021 excludes $3.8 million as such amount is included in merger-related and integration costs.

Note: Adjusted EBITDA and Adjusted EBITDA margin % are non-GAAP financial measures that provide indicators of the Company's performance and its ability to meet debt service requirements. Adjusted EBITDA is defined as EBITDA before other non-operating expenses (income), non-cash stock-based compensation expense, merger-related and integration costs, and net gain on the divestiture of Wesco's legacy utility and data communications businesses in Canada. Adjusted EBITDA margin % is calculated by dividing Adjusted EBITDA by net sales.

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Subsequent Events

9 Months Ended

Sep. 30, 2022

Subsequent Events [Abstract]

Subsequent Events [Text Block]

13. SUBSEQUENT EVENTS

On October 27, 2022, the Company provided notice to participants in the Anixter Inc. Pension Plan of its intention to terminate such plan effective December 31, 2022. The Company will incorporate certain estimates that reflect the pending settlement in the assumptions used to measure the projected benefit obligation associated with this plan at the next measurement date as of December 31, 2022. The Company does not expect the termination to result in any curtailment gain or loss as the Anixter Inc. Pension Plan had previously been frozen during the fourth quarter of 2021. The Company anticipates that the assets held by the plan are sufficient to satisfy all benefit obligations upon termination.

On October 31, 2022, Wesco Distribution amended its Receivables Facility to increase the purchase limit from $1,525 million to $1,625 million.

Also on October 31, 2022, Wesco Distribution amended its Revolving Credit Facility to increase the revolving commitments from $1,525 million to $1,725 million and to increase the sub-facility for loans denominated in Canadian dollars from $600 million to $625 million.

On November 1, 2022, through its wholly-owned subsidiary Wesco Distribution, the Company closed its acquisition of Rahi Systems Holdings, Inc., a leading provider of global hyperscale data center solutions headquartered in Fremont, California. Wesco funded the purchase price paid at closing of $217 million with cash, and borrowings under the Receivables Facility and the Revolving Credit Facility. Due to the timing of the close of the acquisition, the Company will complete its preliminary purchase price allocation during the fourth quarter of 2022.

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ACCOUNTING POLICIES (Policies)

9 Months Ended

Sep. 30, 2022

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

The accompanying unaudited Condensed Consolidated Financial Statements of Wesco have been prepared in accordance with Rule 10-01 of Regulation S-X of the Securities and Exchange Commission (the “SEC”). The unaudited condensed consolidated financial information should be read in conjunction with the audited Consolidated Financial Statements and Notes thereto included in WESCO International, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2021, as filed with the SEC on February 25, 2022. The Condensed Consolidated Balance Sheet at December 31, 2021 was derived from the audited Consolidated Financial Statements as of that date, but does not include all of the disclosures required by accounting principles generally accepted in the United States of America.

The unaudited Condensed Consolidated Balance Sheet as of September 30, 2022, the unaudited Condensed Consolidated Statements of Income and Comprehensive Income and the unaudited Condensed Consolidated Statements of Stockholders' Equity for the three and nine months ended September 30, 2022, and 2021, and the unaudited Condensed Consolidated Statements of Cash Flows for the nine months ended September 30, 2022, and 2021, respectively, in the opinion of management, have been prepared on the same basis as the audited Consolidated Financial Statements and include all adjustments necessary for the fair statement of the results of the interim periods presented herein. All adjustments reflected in the unaudited condensed consolidated financial information are of a normal recurring nature unless indicated. The results for the interim periods presented herein are not necessarily indicative of the results to be expected for the full year.

New Accounting Pronouncements and Changes in Accounting Principles [Text Block]

Recently Adopted and Recently Issued Accounting Standards

In March 2020, the Financial Accounting Standards Board (the "FASB") issued Accounting Standards Update ("ASU") 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The amendments in this ASU are effective for all entities as of March 12, 2020 through December 31, 2022. The Company adopted this ASU during the first quarter of 2022 in connection with amending Wesco's credit facilities, as disclosed in Note 7, "Debt". The replacement of London Interbank Offered Rate ("LIBOR") and the related adoption of the optional guidance under this accounting standard did not have a material impact on the Company's consolidated financial statements and notes thereto.

New Accounting Pronouncements, Policy

Recently Adopted and Recently Issued Accounting Standards

In March 2020, the Financial Accounting Standards Board (the "FASB") issued Accounting Standards Update ("ASU") 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting, which provides optional guidance for a limited period of time to ease the potential burden in accounting for (or recognizing the effects of) reference rate reform on financial reporting. The amendments in this ASU are effective for all entities as of March 12, 2020 through December 31, 2022. The Company adopted this ASU during the first quarter of 2022 in connection with amending Wesco's credit facilities, as disclosed in Note 7, "Debt". The replacement of London Interbank Offered Rate ("LIBOR") and the related adoption of the optional guidance under this accounting standard did not have a material impact on the Company's consolidated financial statements and notes thereto.

In October 2021, the FASB issued ASU 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers, which requires contract assets and contract liabilities acquired in a business combination to be recognized and measured by the acquirer on the acquisition date in accordance with ASC Topic 606, Revenue from Contracts with Customers, as if the acquirer had originated the contracts. The amendments in this ASU are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Management is currently evaluating the impact that the adoption of this accounting standard will have on its consolidated financial statements and notes thereto.

In September 2022, the FASB issued ASU 2022-04, Supplier Finance Programs (Subtopic 405-50): Disclosure of Supplier Finance Program Obligations, which requires that a buyer in a supplier finance program disclose sufficient information about the program to allow a user of financial statements to understand the program's nature, activity during the period, changes from period to period, and potential magnitude. The amendments in this ASU are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, except for the amendment on rollforward information, which is effective for fiscal years beginning after December 15, 2023. Early adoption is permitted. Management is currently evaluating the impact that the adoption of this accounting standard will have on its consolidated financial statements and notes thereto.

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.

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REVENUE (Tables)

9 Months Ended

Sep. 30, 2022

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue [Table Text Block]

The following tables disaggregate Wesco’s net sales by segment and geography for the periods presented:

	Three Months Ended				Nine Months Ended
	September 30				September 30
(In thousands)	2022		2021		2022		2021
Electrical & Electronic Solutions	$	2,234,771	$	1,982,485	$	6,654,883	$	5,626,309
Communications & Security Solutions	1,602,459		1,488,689		4,638,631		4,200,424
Utility & Broadband Solutions	1,608,686		1,257,151		4,568,108		3,538,859
Total by segment	$	5,445,916	$	4,728,325	$	15,861,622	$	13,365,592

	Three Months Ended				Nine Months Ended
	September 30				September 30
(In thousands)	2022		2021		2022		2021
United States	$	4,050,924	$	3,407,437	$	11,745,090	$	9,656,183
Canada	765,281		709,507		2,288,146		2,020,395
Other International(1)	629,711		611,381		1,828,386		1,689,014
Total by geography(2)	$	5,445,916	$	4,728,325	$	15,861,622	$	13,365,592

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GOODWILL (Tables)

9 Months Ended

Sep. 30, 2022

Goodwill [Line Items]

Schedule of Goodwill [Table Text Block]

	Nine Months Ended
	September 30, 2022
	EES		CSS		UBS		Total
	(In thousands)
Beginning balance, January 1	$	860,958	$	1,121,712	$	1,225,663	$	3,208,333
Foreign currency exchange rate changes	(44,301)		(14,449)		(26,153)		(84,903)
Ending balance, September 30	$	816,657	$	1,107,263	$	1,199,510	$	3,123,430

Schedule of Finite-Lived Intangible Assets

The components of intangible assets are as follows:

		As of
		September 30, 2022						December 31, 2021
	Life (in years)	Gross Carrying Amount (1)		Accumulated Amortization (1)		Net Carrying Amount		Gross Carrying Amount (1)		Accumulated Amortization (1)		Net Carrying Amount
Intangible assets:		(In thousands)
Trademarks	Indefinite	$	791,228	$	—	$	791,228	$	795,065	$	—	$	795,065
Customer relationships	10 - 20	1,400,841		(352,638)		1,048,203		1,431,251		(308,180)		1,123,071
Distribution agreements	15 - 19	29,212		(23,936)		5,276		29,212		(22,714)		6,498
Trademarks	5 - 12	15,543		(6,799)		8,744		38,758		(20,058)		18,700
Non-compete agreements	2	—		—		—		4,300		(3,493)		807
		$	2,236,824	$	(383,373)	$	1,853,451	$	2,298,586	$	(354,445)	$	1,944,141

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The following table sets forth the remaining estimated amortization expense for intangible assets for the next five years and thereafter:

For the year ending December 31,	(In thousands)
2022	$	20,467
2023	81,838
2024	79,445
2025	76,389
2026	71,073
Thereafter	733,011

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STOCK-BASED COMPENSATION (Tables)

9 Months Ended

Sep. 30, 2022

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

During the three and nine months ended September 30, 2022 and 2021, Wesco granted the following stock options, stock-settled stock appreciation rights, restricted stock units and performance-based awards at the following weighted-average fair values:

	Three Months Ended				Nine Months Ended
	September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021
Stock options granted	3,249		—		92,799		—
Weighted-average fair value	$	54.13	$	—	$	57.15	$	—
Stock-settled stock appreciation rights granted	—		—		—		139,592
Weighted-average fair value	$	—	$	—	$	—	$	33.19
Restricted stock units granted	1,669		6,897		226,615		314,480
Weighted-average fair value	$	112.33	$	108.76	$	122.04	$	77.81
Performance-based awards granted	—		—		83,991		122,812
Weighted-average fair value	$	—	$	—	$	122.09	$	76.76

Share-based Payment Arrangement, Option and Stock Appreciation Rights, Activity [Table Text Block]

The following table sets forth a summary of stock-settled stock appreciation rights for the nine months ended September 30, 2022:

	Awards	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value (In thousands)
Outstanding at December 31, 2021	1,370,388	$	62.09
Granted	—	—
Exercised	(101,076)	61.79
Forfeited	(8,891)	73.35
Outstanding at September 30, 2022	1,260,421	$	62.03	5.4	$	72,283
Exercisable at September 30, 2022	1,095,626	$	61.92	5.1	$	62,959

For the nine months ended September 30, 2022, the aggregate intrinsic value of stock-settled stock appreciation rights exercised during such period was $7.3 million.

Share-based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]

The following table sets forth a summary of time-based restricted stock units for the nine months ended September 30, 2022:

	Awards	Weighted- Average Fair Value
Unvested at December 31, 2021	974,162	$	53.48
Granted	226,615	122.04
Vested	(382,954)	53.23
Forfeited	(35,118)	62.58
Unvested at September 30, 2022	782,705	$	73.04

Schedule of Nonvested Performance-based Units Activity [Table Text Block]

The following table sets forth a summary of performance-based awards for the nine months ended September 30, 2022:

	Awards	Weighted- Average Fair Value
Unvested at December 31, 2021	380,819	$	59.23
Granted	83,991	122.09
Vested	(115,394)	54.64
Forfeited	(14,087)	60.75
Unvested at September 30, 2022	335,329	$	75.26

Stock Appreciation Rights (SARs) [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

The fair values of stock options and stock-settled stock appreciation rights, as disclosed in the table above, were estimated using the following weighted-average assumptions in the respective periods:

	Three Months Ended			Nine Months Ended
	September 30, 2022		September 30, 2021	September 30, 2022		September 30, 2021
Risk free interest rate	2.9	%	n/a	2.0	%	0.8	%
Expected life (in years)	7		n/a	7		7
Expected volatility	44	%	n/a	43	%	41	%

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EARNINGS PER SHARE (Tables)

9 Months Ended

Sep. 30, 2022

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

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

	Three Months Ended				Nine Months Ended
	September 30				September 30
(In thousands, except per share data)	2022		2021		2022		2021
Net income attributable to WESCO International, Inc.	$	239,602	$	119,596	$	641,551	$	297,969
Less: Preferred stock dividends	14,352		14,352		43,056		43,056
Net income attributable to common stockholders	$	225,250	$	105,244	$	598,495	$	254,913
Weighted-average common shares outstanding used in computing basic earnings per share	50,815		50,386		50,711		50,252
Common shares issuable upon exercise of dilutive equity awards	1,574		1,677		1,675		1,644
Weighted-average common shares outstanding and common share equivalents used in computing diluted earnings per share	52,389		52,063		52,386		51,896
Earnings per share attributable to common stockholders
Basic	$	4.43	$	2.09	$	11.80	$	5.07
Diluted	$	4.30	$	2.02	$	11.42	$	4.91

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DEBT (Tables)

9 Months Ended

Sep. 30, 2022

Debt Disclosure [Abstract]

Schedule of Debt

The following table sets forth Wesco's outstanding indebtedness:

	As of
	September 30, 2022		December 31, 2021
	(In thousands)
International lines of credit	$	6,659	$	7,354
Accounts Receivable Securitization Facility	1,525,000		1,270,000
Revolving Credit Facility	883,097		596,959
5.50% Anixter Senior Notes due 2023	58,636		58,636
6.00% Anixter Senior Notes due 2025	4,173		4,173
7.125% Senior Notes due 2025	1,500,000		1,500,000
7.250% Senior Notes due 2028, less debt discount of $7,155 and $8,088 in 2022 and 2021, respectively	1,317,845		1,316,912
Finance lease obligations	19,872		18,563
Total debt	5,315,282		4,772,597
Plus: Fair value adjustment to the Anixter Senior Notes	439		957
Less: Unamortized debt issuance costs	(53,610)		(62,484)
Less: Short-term debt and current portion of long-term debt(1)	(69,295)		(9,528)
Total long-term debt	$	5,192,816	$	4,701,542

(1)    As of September 30, 2022, short-term debt and current portion of long-term debt includes the $58.6 million aggregate principal amount of the Company's 5.50% Anixter Senior Notes due 2023, which mature on March 1, 2023.

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EMPLOYEE BENEFIT PLANS Schedule of Net Benefit Costs (Tables)

9 Months Ended

Sep. 30, 2022

Postemployment Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

The following tables set forth the components of net periodic pension (benefit) cost for the Company's defined benefit plans:

	Three Months Ended
(In thousands)	September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021
	Domestic Plans				Foreign Plans				Total
Service cost	$	—	$	764	$	2,047	$	3,251	$	2,047	$	4,015
Interest cost	2,083		2,018		2,174		2,465		4,257		4,483
Expected return on plan assets	(3,497)		(4,414)		(4,017)		(4,277)		(7,514)		(8,691)
Recognized actuarial gain(1)	—		—		(179)		103		(179)		103
Net periodic pension (benefit) cost	$	(1,414)	$	(1,632)	$	25	$	1,542	$	(1,389)	$	(90)

	Nine Months Ended
(In thousands)	September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021		September 30, 2022		September 30, 2021
	Domestic Plans				Foreign Plans				Total
Service cost	$	—	$	2,291	$	6,318	$	9,791	$	6,318	$	12,082
Interest cost	6,250		6,095		6,742		7,425		12,992		13,520
Expected return on plan assets	(10,491)		(13,241)		(12,468)		(12,898)		(22,959)		(26,139)
Recognized actuarial gain(1)	—		—		(547)		311		(547)		311
Settlement	—		(19)		—		—		—		(19)
Net periodic pension (benefit) cost	$	(4,241)	$	(4,874)	$	45	$	4,629	$	(4,196)	$	(245)

(1)    For the three and nine months ended September 30, 2022 and 2021, no material amounts were reclassified from accumulated other comprehensive income into net income.

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Segment Reporting (Tables)

9 Months Ended

Sep. 30, 2022

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

The following tables set forth financial information by reportable segment for the periods presented:

(In thousands)	Three Months Ended September 30, 2022
	EES			CSS			UBS			Corporate		Total
Net sales	$	2,234,771		$	1,602,459		$	1,608,686		$	—	$	5,445,916
Adjusted EBITDA	225,764			156,370			186,257			(102,495)		465,896
Adjusted EBITDA Margin %	10.1		%	9.8		%	11.6		%			8.6		%
	Three Months Ended September 30, 2021
(In thousands)	EES			CSS			UBS			Corporate		Total
Net sales	$	1,982,485		$	1,488,689		$	1,257,151		$	—	$	4,728,325
Adjusted EBITDA	173,898			133,701			114,674			(92,013)		330,260
Adjusted EBITDA Margin %	8.8		%	9.0		%	9.1		%			7.0		%

(In thousands)	Nine Months Ended September 30, 2022
	EES			CSS			UBS			Corporate		Total
Net sales	$	6,654,883		$	4,638,631		$	4,568,108		$	—	$	15,861,622
Adjusted EBITDA	653,630			429,452			491,652			(300,256)		1,274,478
Adjusted EBITDA Margin %	9.8		%	9.3		%	10.8		%			8.0		%
	Nine Months Ended September 30, 2021
(In thousands)	EES			CSS			UBS			Corporate		Total
Net sales	$	5,626,309		$	4,200,424		$	3,538,859		$	—	$	13,365,592
Adjusted EBITDA	453,894			355,521			299,030			(252,391)		856,054
Adjusted EBITDA Margin %	8.1		%	8.5		%	8.4		%			6.4		%

The following tables reconcile net income attributable to common stockholders to adjusted EBITDA and adjusted EBITDA margin % by segment, which are non-GAAP financial measures, for the periods presented:

	Three Months Ended September 30, 2022
(In thousands)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	214,054		$	138,747		$	180,354		$	(307,905)	$	225,250
Net income attributable to noncontrolling interests	200			—			—			408		608
Preferred stock dividends	—			—			—			14,352		14,352
Provision for income taxes	—			—			—			85,637		85,637
Interest expense, net	—			—			—			75,057		75,057
Depreciation and amortization	9,596			15,929			5,859			11,339		42,723
Other (income) expense, net	(1,069)			266			(1,063)			2,554		688
Stock-based compensation expense(1)	2,983			1,428			1,107			2,853		8,371
Merger-related and integration costs	—			—			—			13,210		13,210
Adjusted EBITDA	$	225,764		$	156,370		$	186,257		$	(102,495)	$	465,896
Adjusted EBITDA margin %	10.1		%	9.8		%	11.6		%			8.6		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the three months ended September 30, 2022 excludes $1.3 million as such amount is included in merger-related and integration costs.

Reconciliation of Assets from Segment to Consolidated

The following table sets forth total assets by reportable segment for the periods presented:

	As of
	September 30, 2022
(In thousands)	EES		CSS		UBS		Corporate(1)		Total
Total assets	$	4,541,553	$	4,988,009	$	3,817,459	$	733,543	$	14,080,564
	As of
	December 31, 2021
(In thousands)	EES		CSS		UBS		Corporate(1)		Total
Total assets	$	4,098,335	$	4,601,132	$	3,266,231	$	652,001	$	12,617,699

(1)    Total assets for Corporate primarily consist of cash and cash equivalents, deferred income taxes, fixed assets and right-of-use assets associated with operating leases.

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REVENUE (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Deferred Revenue	$ 55,500		$ 55,500		$ 35,500
Revenue from Contract with Customer, Excluding Assessed Tax	5,445,916	$ 4,728,325	15,861,622	$ 13,365,592
Cost of goods sold	4,241,401	3,720,332	12,418,561	10,581,406
Contract with Customer, Refund Liability	45,500		45,500		$ 38,800
EES
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,234,771	1,982,485	6,654,883	5,626,309
CSS
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,602,459	1,488,689	4,638,631	4,200,424
UBS
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,608,686	1,257,151	4,568,108	3,538,859
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,050,924	3,407,437	11,745,090	9,656,183
CANADA
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	765,281	709,507	2,288,146	2,020,395
Non-US [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	629,711	611,381	1,828,386	1,689,014
Shipping and Handling [Member]
Disaggregation of Revenue [Line Items]
Cost of goods sold	$ 77,900	$ 63,500	$ 222,000	$ 179,500

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REVENUE Deferred Revenue (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Deferred Revenue	$ 55,500	$ 35,500
Contract with Customer, Asset, before Allowance for Credit Loss	$ 38,600	$ 33,400

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REVENUE Shipping and Handling Costs (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Cost of goods sold	$ 4,241,401	$ 3,720,332	$ 12,418,561	$ 10,581,406
Shipping and Handling [Member]
Cost of goods sold	$ 77,900	$ 63,500	$ 222,000	$ 179,500

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REVENUE Variable Consideration (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue, Methods, Inputs, and Assumptions Used [Abstract]
Revenue, Variable Consideration Constraint Increase (Decrease)	$ 120,500	$ 85,800	$ 324,100	$ 246,900
Prior Period Adjustment [Abstract]
Prior Period Reclassification Adjustment		$ (9,700)		$ (27,800)

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REVENUE Revenue, Performance Obligation (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Cost of goods sold	$ 4,241,401	$ 3,720,332	$ 12,418,561	$ 10,581,406

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GOODWILL (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Goodwill [Line Items]
Goodwill	$ 3,123,430		$ 3,123,430		$ 3,208,333
Goodwill, Foreign Currency Translation Gain (Loss)			(84,903)
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,236,824		2,236,824		2,298,586
Finite-Lived Intangible Assets, Accumulated Amortization	(383,373)		(383,373)		(354,445)
Finite-Lived Intangible Assets, Net	1,853,451		1,853,451		1,944,141
Finite-Lived Intangible Asset, Expected Amortization, Year One	20,467		20,467
Finite-Lived Intangible Asset, Expected Amortization, Year Two	81,838		81,838
Finite-Lived Intangible Asset, Expected Amortization, Year Three	79,445		79,445
Finite-Lived Intangible Asset, Expected Amortization, Year Four	76,389		76,389
Finite-Lived Intangible Asset, Expected Amortization, Year Five	71,073		71,073
Finite-Lived Intangible Asset, Expected Amortization, after Year Five	733,011		733,011
Amortization of Intangible Assets	21,000	$ 37,100	71,400	$ 85,800
Amortization of Intangible Assets	21,000	$ 37,100	71,400	$ 85,800
Finite-Lived Intangible Asset, Expected Amortization, Year Three	79,445		79,445
Finite-Lived Intangible Asset, Expected Amortization, Year Four	76,389		76,389
Finite-Lived Intangible Asset, Expected Amortization, Year Five	71,073		71,073
Finite-Lived Intangible Asset, Expected Amortization, after Year Five	733,011		733,011
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	15,543		15,543		38,758
Finite-Lived Intangible Assets, Accumulated Amortization	(6,799)		(6,799)		(20,058)
Finite-Lived Intangible Assets, Net	8,744		$ 8,744		18,700
Trademarks [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			12 years
Noncompete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	0		$ 0		4,300
Finite-Lived Intangible Assets, Accumulated Amortization	0		0		(3,493)
Finite-Lived Intangible Assets, Net	0		$ 0		807
Noncompete Agreements [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			2 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	1,400,841		$ 1,400,841		1,431,251
Finite-Lived Intangible Assets, Accumulated Amortization	(352,638)		(352,638)		(308,180)
Finite-Lived Intangible Assets, Net	1,048,203		$ 1,048,203		1,123,071
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			10 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			20 years
Distribution Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	29,212		$ 29,212		29,212
Finite-Lived Intangible Assets, Accumulated Amortization	(23,936)		(23,936)		(22,714)
Finite-Lived Intangible Assets, Net	5,276		$ 5,276		6,498
Distribution Rights [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			15 years
Distribution Rights [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life			19 years
EES
Goodwill [Line Items]
Goodwill	816,657		$ 816,657		860,958
Goodwill, Foreign Currency Translation Gain (Loss)			(44,301)
CSS
Goodwill [Line Items]
Goodwill	1,107,263		1,107,263		1,121,712
Goodwill, Acquired During Period			(14,449)
UBS
Goodwill [Line Items]
Goodwill	1,199,510		1,199,510		1,225,663
Goodwill, Acquired During Period			(26,153)
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 791,228		$ 791,228		$ 795,065

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STOCK-BASED COMPENSATION AWARDS (Details) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	0	0	0	139,592
Granted, Weighted Average Fair Value (in dollars per share)	$ 0	$ 0	$ 0	$ 33.19
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	1,669	6,897	226,615	314,480
Granted, Weighted Average Fair Value (in dollars per share)	$ 112.33	$ 108.76	$ 122.04	$ 77.81
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	0	0	83,991	122,812
Granted, Weighted Average Fair Value (in dollars per share)	$ 0	$ 0	$ 122.09	$ 76.76
Share-based Payment Arrangement, Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	3,249	0	92,799	0
Granted, Weighted Average Fair Value (in dollars per share)	$ 54.13	$ 0	$ 57.15	$ 0

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SCHEDULE OF SHARE-BASED COMPENSATION, STOCK OPTIONS AND STOCK APPRECIATION RIGHTS AWARD ACTIVITY (Details) - Stock Appreciation Rights (SARs) [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	1,260,421		1,260,421		1,370,388
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 62.03		$ 62.03		$ 62.09
Granted (in shares)	0	0	0	139,592
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price			$ 0
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised			(101,076)
Weighted Average Exercise Price, Exercises in Period (in dollars per share)			$ 61.79
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures			(8,891)
Weighted Average Exercise Price, Forfeitures in Period (in dollars per share)			$ 73.35
Weighted Average Remaining Contractual Term, Outstanding (in years)			5 years 4 months 24 days
Aggregate Intrinsic Value, Outstanding	$ 72,283		$ 72,283
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	1,095,626		1,095,626
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 61.92		$ 61.92
Weighted Average Remaining Contractual Term, Exercisable (in years)			5 years 1 month 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 62,959		$ 62,959
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value			$ 7,300

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SCHEDULE OF SHARE-BASED PAYMENT AWARD, VALUATION ASSUMPTIONS (Details)	3 Months Ended	9 Months Ended
	Sep. 30, 2022 Rate	Sep. 30, 2022 Rate	Sep. 30, 2021 Rate
Share-Based Payment Arrangement [Abstract]
WESCO expected volatility	44.00%	43.00%	41.00%
Risk free interest rate	2.90%	2.00%	0.80%
Expected life (in years)	7 years	7 years	7 years

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SUMMARY OF RESTRICTED STOCK UNITS (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based awards outstanding (in shares)	782,705		782,705		974,162
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 73.04		$ 73.04		$ 53.48
Granted (in shares)	1,669	6,897	226,615	314,480
Granted, Weighted Average Fair Value (in dollars per share)	$ 112.33	$ 108.76	$ 122.04	$ 77.81
Vested (in shares)			(382,954)
Vested in Period, Weighted Average Fair Value (in dollars per share)			$ 53.23
Forfeited (in shares)			(35,118)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value			$ 62.58

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SUMMARY OF PERFORMANCE-BASED AWARDS (Details) - Performance Shares [Member] - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Unvested (in shares)	335,329		335,329		380,819
Granted (in shares)	0	0	83,991	122,812
Vested (in shares)			(115,394)
Forfeited (in shares)			(14,087)
Unvested, Weighted Average Fair Value (in dollars per share)	$ 75.26		$ 75.26		$ 59.23
Granted, Weighted Average Fair Value (in dollars per share)	$ 0	$ 0	122.09	$ 76.76
Vested in Period, Weighted Average Fair Value (in dollars per share)			54.64
Forfeited in Period, Weighted Average Fair Value (in dollars per share)			$ 60.75

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STOCK-BASED COMPENSATION (Details) - USD ($) $ in Thousands	3 Months Ended					6 Months Ended	9 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2024	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2022	Sep. 30, 2022	Sep. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense				$ 9,700	$ 9,600		$ 34,446	$ 22,784
Total unrecognized compensation cost				$ 58,200			$ 58,200
Forecast [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 1,800	$ 14,900	$ 30,800			$ 10,700

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Summary of Non-Qualified Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
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, Non-Option Equity Instruments, Outstanding, Number	1,260,421		1,260,421		1,370,388
Granted (in shares)	0	0	0	139,592
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised			(101,076)
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures			(8,891)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	1,095,626		1,095,626
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 62.03		$ 62.03		$ 62.09
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price			0
Weighted Average Exercise Price, Exercises in Period (in dollars per share)			61.79
Weighted Average Exercise Price, Forfeitures in Period (in dollars per share)			73.35
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 61.92		$ 61.92
Weighted Average Remaining Contractual Term, Outstanding (in years)			5 years 4 months 24 days
Aggregate Intrinsic Value, Outstanding	$ 72,283		$ 72,283
Weighted Average Remaining Contractual Term, Exercisable (in years)			5 years 1 month 6 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 62,959		$ 62,959
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value			$ 7,300
Share-based Payment Arrangement, Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number	87,347		87,347		0
Granted (in shares)	3,249	0	92,799	0
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised			0
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures			(5,452)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	879		879
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 121.55		$ 121.55		$ 0
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price			121.58
Weighted Average Exercise Price, Exercises in Period (in dollars per share)			0
Weighted Average Exercise Price, Forfeitures in Period (in dollars per share)			122.09
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 122.09		$ 122.09
Weighted Average Remaining Contractual Term, Outstanding (in years)			9 years 3 months 18 days
Aggregate Intrinsic Value, Outstanding	$ 39		$ 39
Weighted Average Remaining Contractual Term, Exercisable (in years)			10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 0		$ 0

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SCHEDULE OF EARNINGS PER SHARE, BASIC AND DILUTED (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021
Earnings Per Share [Abstract]
Net income (loss) attributable to WESCO International, Inc.	$ 239,602	$ 220,706	$ 181,243	$ 119,596	$ 119,195	$ 59,178	$ 641,551	$ 297,969
Weighted average common shares outstanding used in computing basic earnings per share (in shares)	50,815,000			50,386,000			50,711,000	50,252,000
Common shares issuable upon exercise of dilutive stock options (in shares)	1,574,000			1,677,000			1,675,000	1,644,000
Weighted average common shares outstanding and common share equivalents used in computing diluted earnings per share (in shares)	52,389,000			52,063,000			52,386,000	51,896,000
Diluted (in dollars per share)	$ 4.30			$ 2.02			$ 11.42	$ 4.91
Basic (in dollars per share)	$ 4.43			$ 2.09			$ 11.80	$ 5.07
Net Income (Loss) Available to Common Stockholders, Basic	$ 225,250			$ 105,244			$ 598,495	$ 254,913
Preferred Stock Dividends, Income Statement Impact	$ 14,352			$ 14,352			$ 43,056	$ 43,056

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EARNINGS PER SHARE (Details) - shares	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022	Sep. 30, 2021
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, Amount	88,896	88,071	139,592

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SCHEDULE OF DEBT (Details) - USD ($) $ in Thousands	Sep. 30, 2022		Dec. 31, 2021
Debt Instrument [Line Items]
Finance lease obligations	$ 19,872		$ 18,563
Total debt	5,315,282		4,772,597
Fair value adjustment to the Anixter Notes	439		957
Unamortized debt issuance costs	(53,610)		(62,484)
Short-term debt and current portion of long-term debt	(69,295)	[1]	(9,528)
Total long-term debt	5,192,816		4,701,542
Foreign Line of Credit
Debt Instrument [Line Items]
Long-term Debt	6,659		7,354
Accounts Receivable Securitization Facility
Debt Instrument [Line Items]
Long-term Debt	1,525,000		1,270,000
Revolving Credit Facility
Debt Instrument [Line Items]
Long-term Debt	883,097		596,959
5.50% Senior Notes due 2023
Debt Instrument [Line Items]
Long-term Debt	58,636		58,636
6.00% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term Debt	4,173		4,173
7.125% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term Debt	1,500,000		1,500,000
7.250% Senior Notes due 2028
Debt Instrument [Line Items]
Long-term Debt	1,317,845		1,316,912
Debt Instrument, Unamortized Discount	$ 7,155		$ 8,088

[1] (1)    As of September 30, 2022, short-term debt and current portion of long-term debt includes the $58.6 million aggregate principal amount of the Company's 5.50% Anixter Senior Notes due 2023, which mature on March 1, 2023.

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DEBT (Details) - USD ($) $ in Thousands	2 Months Ended		5 Months Ended	7 Months Ended
	Sep. 30, 2022	Feb. 28, 2022	Aug. 01, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Accounts Receivable Securitization Facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,525,000			$ 1,525,000	$ 1,400,000	$ 1,300,000
Debt Instrument, Basis Spread on Variable Rate	1.05%	1.15%	1.10%
Debt Instrument, Maturity Date		Jun. 01, 2024		Mar. 01, 2025
Accordion feature commitment					1,750,000	1,500,000
Long-term Debt	$ 1,525,000			$ 1,525,000		1,270,000
Revolving Credit Facility
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	1,525,000			$ 1,525,000	1,350,000	1,200,000
Debt Instrument, Maturity Date		Jun. 22, 2025		Mar. 01, 2027
Aggregate Revolving Commitment Capacity					650,000	400,000
Canadian Dollar Sub-Facility Commitment	600,000			$ 600,000	$ 550,000	500,000
Long-term Debt	883,097			$ 883,097		596,959
Revolving Credit Facility | Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.00%		0.00%
Revolving Credit Facility | Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.50%		0.50%
5.50% Senior Notes due 2023
Debt Instrument [Line Items]
Long-term Debt	58,636			$ 58,636		58,636
6.00% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term Debt	4,173			4,173		4,173
7.125% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term Debt	1,500,000			1,500,000		1,500,000
7.250% Senior Notes due 2028
Debt Instrument [Line Items]
Long-term Debt	$ 1,317,845			$ 1,317,845		$ 1,316,912

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Defined Contribution Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Postemployment Benefits [Abstract]
Defined Contribution Plan, Cost	$ 12,400	$ 16,400	$ 45,400	$ 49,100

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Defined Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2,047	$ 4,015	$ 6,318	$ 12,082
Interest cost	4,257	4,483	12,992	13,520
Expected return on plan assets	(7,514)	(8,691)	(22,959)	(26,139)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(179)	103	(547)	311
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			0	(19)
Net periodic benefit cost	(1,389)	(90)	(4,196)	(245)
Defined Benefit Plan, Service Cost	2,047	4,015	6,318	12,082
Defined Benefit Plan, Plan Assets, Contributions by Employer			9,300
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	764	0	2,291
Interest cost	2,083	2,018	6,250	6,095
Expected return on plan assets	(3,497)	(4,414)	(10,491)	(13,241)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			0	(19)
Net periodic benefit cost	(1,414)	(1,632)	(4,241)	(4,874)
Defined Benefit Plan, Service Cost	0	764	0	2,291
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	2,047	3,251	6,318	9,791
Interest cost	2,174	2,465	6,742	7,425
Expected return on plan assets	(4,017)	(4,277)	(12,468)	(12,898)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(179)	103	(547)	311
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			0	0
Net periodic benefit cost	25	1,542	45	4,629
Defined Benefit Plan, Service Cost	2,047	3,251	6,318	9,791
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	10,800		10,800
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Nonoperating Gains (Losses)	$ (3,400)	$ (4,100)	$ (10,500)	$ (12,300)

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Compensation Related Costs, Postemployment Benefits (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Defined Contribution Plan Disclosure [Line Items]
Service cost	$ 2,047	$ 4,015	$ 6,318	$ 12,082
Interest cost	4,257	4,483	12,992	13,520
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	7,514	8,691	22,959	26,139
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	179	(103)	547	(311)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(1,389)	(90)	(4,196)	(245)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer			9,300
WESCODeferredCompensationPlanMember
Defined Contribution Plan Disclosure [Line Items]
Deferred Compensation Liability, Classified, Noncurrent	19,600		19,600		$ 20,900
Pension Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other Nonoperating Gains (Losses)	(3,400)	(4,100)	(10,500)	(12,300)
UNITED STATES
Defined Contribution Plan Disclosure [Line Items]
Service cost	0	764	0	2,291
Interest cost	2,083	2,018	6,250	6,095
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	3,497	4,414	10,491	13,241
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(1,414)	(1,632)	(4,241)	(4,874)
Foreign Plan
Defined Contribution Plan Disclosure [Line Items]
Service cost	2,047	3,251	6,318	9,791
Interest cost	2,174	2,465	6,742	7,425
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	4,017	4,277	12,468	12,898
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	179	(103)	547	(311)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	25	1,542	$ 45	4,629
U.S. Defined Contribution Plan Merger | Defined Benefit Contribution Plan Initial Percent Of Employer Match Member
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match			100.00%
Defined Contribution Plan Employer Matching Contribution Percent			3.00%
U.S. Defined Contribution Plan Merger | Defined Benefit Contribution Plan Additional Percent Of Employer Match
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match			50.00%
Defined Contribution Plan Employer Matching Contribution Percent			4.00%
Wesco Canadian Defined Contribution Plan
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent			5.00%
Wesco Canadian Defined Contribution Plan | Defined Benefit Contribution Plan Initial Percent Of Employer Match Member
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan Employer Matching Contribution Percent			3.00%
Wesco Canadian Defined Contribution Plan | Defined Benefit Contribution Plan Additional Percent Of Employer Match
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Matching Contribution, Percent of Match			50.00%
Defined Contribution Plan Employer Matching Contribution Percent			4.00%
Phantom Share Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
Share-based Payment Arrangement, Expense	1,800	$ 3,400	$ 1,600	$ 9,800
Other Deferred Compensation Arrangements, Liability, Classified, Noncurrent	$ 7,900		$ 7,900		$ 22,700

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Other Benefits (Details) - Phantom Share Units (PSUs) [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Compensation Related Costs [Abstract]
Deferred Compensation Cash-Based Arrangements, Liability, Current and Noncurrent	$ 7,100		$ 7,100		$ 17,300
Deferred Compensation Cash-Based Arrangements, Liability, Current					10,900
Deferred Compensation Cash-Based Arrangements, Liability, Classified, Noncurrent					6,400
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period			3 years
Other Deferred Compensation Arrangements, Liability, Classified, Noncurrent	7,900		$ 7,900		22,700
Share-based Payment Arrangement, Expense	1,800	$ 3,400	1,600	$ 9,800
Deferred Compensation Cash-Based Arrangements, Liability, Current					10,900
Deferred Compensation Cash-Based Arrangements, Liability, Current and Noncurrent	7,100		7,100		17,300
Deferred Compensation Cash-Based Arrangements, Liability, Classified, Noncurrent					$ 6,400
Share-based Payment Arrangement, Expense	$ 1,800	$ 3,400	$ 1,600	$ 9,800

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FAIR VALUE (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative, Notional Amount	$ 224,300	$ 188,600
Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	2,866,500	3,118,000
Long-term Debt	$ 2,881,100	$ 2,880,700

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INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Tax Contingency [Line Items]
Effective tax rate	26.30%	27.20%	24.00%	22.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount	$ 3,200	$ 3,300	$ 9,400	$ 7,800
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 800	$ 4,200	$ 800	$ 4,200

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INCOME TAXES Income Tax Rates (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	26.30%	27.20%	24.00%	22.00%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	70.00%	70.00%	260.00%	310.00%
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount			$ 13,400	$ 8,300
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount	$ 3,200	$ 3,300	$ 9,400	$ 7,800

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Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Segment Reporting [Abstract]
Revenues	$ 5,445,916	$ 4,728,325	$ 15,861,622	$ 13,365,592
Operating Income (Loss)	401,592	229,466	1,056,330	581,589
Adjusted EBITDA	$ 465,896	$ 330,260	$ 1,274,478	$ 856,054
Adjusted EBITDA Margin %	8.60%	7.00%	8.00%	6.40%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 5,445,916	$ 4,728,325	$ 15,861,622	$ 13,365,592
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	401,592	229,466	1,056,330	581,589
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	14,080,564		14,080,564		$ 12,617,699
EES
Segment Reporting [Abstract]
Adjusted EBITDA	$ 225,764	$ 173,898	$ 653,630	$ 453,894
Adjusted EBITDA Margin %	10.10%	8.80%	9.80%	8.10%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,234,771	$ 1,982,485	$ 6,654,883	$ 5,626,309
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,541,553		4,541,553		4,098,335
CSS
Segment Reporting [Abstract]
Adjusted EBITDA	$ 156,370	$ 133,701	$ 429,452	$ 355,521
Adjusted EBITDA Margin %	9.80%	9.00%	9.30%	8.50%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,602,459	$ 1,488,689	$ 4,638,631	$ 4,200,424
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,988,009		4,988,009		4,601,132
UBS
Segment Reporting [Abstract]
Adjusted EBITDA	$ 186,257	$ 114,674	$ 491,652	$ 299,030
Adjusted EBITDA Margin %	11.60%	9.10%	10.80%	8.40%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,608,686	$ 1,257,151	$ 4,568,108	$ 3,538,859
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	3,817,459		3,817,459		3,266,231
Corporate Segment
Segment Reporting [Abstract]
Adjusted EBITDA	(102,495)	(92,013)	(300,256)	(252,391)
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0	$ 0	0	$ 0
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 733,543		$ 733,543		$ 652,001

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Segment Reporting - ADJ EBITDA Reconciliations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net Income (Loss) Available to Common Stockholders, Basic	$ 225,250	$ 105,244	$ 598,495	$ 254,913
Net (loss) income attributable to noncontrolling interest	608	600	1,439	665
Preferred Stock Dividends, Income Statement Impact	14,352	14,352	43,056	43,056
Provision for income taxes	85,637	44,870	203,178	84,201
Nonoperating Income (Expense)	75,057	69,720	207,155	207,683
Depreciation and amortization	42,723	56,732	135,569	144,645
Other Nonoperating Income (Expense)	688	(5,320)	3,007	(8,929)
StockBasedCompensationExpenseEBITDA	8,371	8,312	30,379	18,955
MergerRelatedAndIntegrationCosts	13,210	35,750	52,200	119,792
Gain (Loss) on Disposition of Business			0	(8,927)
Adjusted EBITDA	465,896	330,260	1,274,478	856,054
Stock-based compensation expense	$ 9,700	$ 9,600	$ 34,446	$ 22,784
Adjusted EBITDA Margin %	8.60%	7.00%	8.00%	6.40%
Merger Related Stock Based Compensation Expense	$ 1,300	$ 1,300	$ 4,100	$ 3,800
EES
Net Income (Loss) Available to Common Stockholders, Basic	214,054	155,627	615,547	410,233
Net (loss) income attributable to noncontrolling interest	200	309	561	158
Preferred Stock Dividends, Income Statement Impact	0	0	0	0
Provision for income taxes	0	0	0	0
Nonoperating Income (Expense)	0	0	0	0
Depreciation and amortization	9,596	16,840	32,818	40,184
Other Nonoperating Income (Expense)	1,069	726	2,646	1,329
StockBasedCompensationExpenseEBITDA	2,983	1,848	7,350	4,648
MergerRelatedAndIntegrationCosts	0	0	0	0
Gain (Loss) on Disposition of Business				0
Adjusted EBITDA	$ 225,764	$ 173,898	$ 653,630	$ 453,894
Adjusted EBITDA Margin %	10.10%	8.80%	9.80%	8.10%
CSS
Net Income (Loss) Available to Common Stockholders, Basic	$ 138,747	$ 107,898	$ 373,073	$ 292,537
Net (loss) income attributable to noncontrolling interest	0	0	0	0
Preferred Stock Dividends, Income Statement Impact	0	0	0	0
Provision for income taxes	0	0	0	0
Nonoperating Income (Expense)	0	0	0	0
Depreciation and amortization	15,929	24,723	51,916	60,257
Other Nonoperating Income (Expense)	(266)	(328)	(716)	(909)
StockBasedCompensationExpenseEBITDA	1,428	752	3,747	1,818
MergerRelatedAndIntegrationCosts	0	0	0	0
Gain (Loss) on Disposition of Business				0
Adjusted EBITDA	$ 156,370	$ 133,701	$ 429,452	$ 355,521
Adjusted EBITDA Margin %	9.80%	9.00%	9.30%	8.50%
UBS
Net Income (Loss) Available to Common Stockholders, Basic	$ 180,354	$ 108,150	$ 472,119	$ 289,851
Net (loss) income attributable to noncontrolling interest	0	0	0	0
Preferred Stock Dividends, Income Statement Impact	0	0	0	0
Provision for income taxes	0	0	0	0
Nonoperating Income (Expense)	0	0	0	0
Depreciation and amortization	5,859	5,869	17,315	16,545
Other Nonoperating Income (Expense)	1,063	(22)	452	(44)
StockBasedCompensationExpenseEBITDA	1,107	633	2,670	1,517
MergerRelatedAndIntegrationCosts	0	0	0	0
Gain (Loss) on Disposition of Business				8,927
Adjusted EBITDA	$ 186,257	$ 114,674	$ 491,652	$ 299,030
Adjusted EBITDA Margin %	11.60%	9.10%	10.80%	8.40%
Corporate Segment
Net Income (Loss) Available to Common Stockholders, Basic	$ (307,905)	$ (266,431)	$ (862,244)	$ (737,708)
Net (loss) income attributable to noncontrolling interest	408	291	878	507
Preferred Stock Dividends, Income Statement Impact	14,352	14,352	43,056	43,056
Provision for income taxes	85,637	44,870	203,178	84,201
Nonoperating Income (Expense)	(75,057)	(69,720)	(207,155)	(207,683)
Depreciation and amortization	11,339	9,300	33,520	27,659
Other Nonoperating Income (Expense)	(2,554)	4,944	(5,389)	8,553
StockBasedCompensationExpenseEBITDA	2,853	5,079	16,612	10,972
MergerRelatedAndIntegrationCosts	13,210	35,750	52,200	119,792
Gain (Loss) on Disposition of Business				0
Adjusted EBITDA	$ (102,495)	$ (92,013)	$ (300,256)	$ (252,391)

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Subsequent Events (Details) - USD ($) $ in Thousands		2 Months Ended		5 Months Ended
	Nov. 04, 2022	Sep. 30, 2022	Feb. 28, 2022	Aug. 01, 2022	Oct. 31, 2022	Jun. 30, 2022	Dec. 31, 2021
Subsequent Event | Rahi Systems
Subsequent Event [Line Items]
Total purchase consideration	$ 217,000
Accounts Receivable Securitization Facility
Subsequent Events [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,525,000				$ 1,400,000	$ 1,300,000
Debt Instrument, Basis Spread on Variable Rate		1.05%	1.15%	1.10%
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,525,000				1,400,000	1,300,000
Debt Instrument, Basis Spread on Variable Rate		1.05%	1.15%	1.10%
Accounts Receivable Securitization Facility | Subsequent Event
Subsequent Events [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity					$ 1,625,000
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					1,625,000
Revolving Credit Facility
Subsequent Events [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity		$ 1,525,000				1,350,000	1,200,000
Canadian Dollar Sub-Facility Commitment		600,000				550,000	500,000
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		1,525,000				1,350,000	1,200,000
Canadian Dollar Sub-Facility Commitment		$ 600,000				$ 550,000	$ 500,000
Revolving Credit Facility | Subsequent Event
Subsequent Events [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity					1,725,000
Canadian Dollar Sub-Facility Commitment					625,000
Subsequent Event [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity					1,725,000
Canadian Dollar Sub-Facility Commitment					$ 625,000