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 March 31, 2023

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 May 4, 2023, 51,272,245 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.	19
Item 3. Quantitative and Qualitative Disclosures About Market Risk.	30
Item 4. Controls and Procedures.	30
PART II—OTHER INFORMATION
Item 1. Legal Proceedings.	31
Item 1A. Risk Factors.	31
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.	31
Item 6. Exhibits.	31
Signatures	33

1

Table of Contents

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)	7

2

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(In millions, except shares)

(unaudited)

	As of
Assets	March 31, 2023		December 31, 2022
Current assets:
Cash and cash equivalents	$	349.1	$	527.3
Trade accounts receivable, net of allowance for expected credit losses of $52.5 and $46.5 in 2023 and 2022, respectively	3,807.4		3,662.7
Other accounts receivable	344.3		435.7
Inventories	3,729.5		3,498.8
Prepaid expenses and other current assets	217.8		206.0
Total current assets	8,448.1		8,330.5
Property, buildings and equipment, net of accumulated depreciation of $452.9 and $425.8 in 2023 and 2022, respectively	402.1		402.7
Operating lease assets	660.1		625.1
Intangible assets, net	1,921.5		1,943.4
Goodwill	3,244.8		3,240.9
Other assets	294.6		269.1
Total assets	$	14,971.2	$	14,811.7
Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable	$	2,648.3	$	2,728.2
Accrued payroll and benefit costs	121.6		269.1
Short-term debt and current portion of long-term debt	7.6		70.5
Other current liabilities	761.4		749.5
Total current liabilities	3,538.9		3,817.3
Long-term debt, net of debt discount and debt issuance costs of $54.2 and $57.9 in 2023 and 2022, respectively	5,595.1		5,346.0
Operating lease liabilities	540.5		510.4
Deferred income taxes	472.1		460.7
Other noncurrent liabilities	234.9		227.7
Total liabilities	$	10,381.5	$	10,362.1
Commitments and contingencies (Note 11)
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 2023 and 2022	—		—
Common stock, $.01 par value; 210,000,000 shares authorized, 69,110,060 and 68,535,704 shares issued, and 51,254,021 and 50,759,482 shares outstanding in 2023 and 2022, respectively	0.7		0.7
Class B nonvoting convertible common stock, $.01 par value; 20,000,000 shares authorized, 4,339,431 issued and no shares outstanding in 2023 and 2022, respectively	—		—
Additional capital	2,003.3		2,005.4
Retained earnings	3,933.0		3,795.0
Treasury stock, at cost; 22,195,470 and 22,115,653 shares in 2023 and 2022, respectively	(982.0)		(969.1)
Accumulated other comprehensive loss	(360.7)		(377.7)
Total WESCO International, Inc. stockholders' equity	4,594.3		4,454.3
Noncontrolling interests	(4.6)		(4.7)
Total stockholders’ equity	4,589.7		4,449.6
Total liabilities and stockholders’ equity	$	14,971.2	$	14,811.7

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 millions, except per share data)

(unaudited)

	Three Months Ended
	March 31
	2023		2022
Net sales	$	5,521.9	$	4,932.2
Cost of goods sold (excluding depreciation and amortization)	4,313.4		3,883.1
Selling, general and administrative expenses	817.7		718.1
Depreciation and amortization	44.4		47.0
Income from operations	346.4		284.0
Interest expense, net	95.0		63.6
Other expense, net	10.1		1.1
Income before income taxes	241.3		219.3
Provision for income taxes	44.1		37.7
Net income	197.2		181.6
Less: Net income attributable to noncontrolling interests	0.1		0.4
Net income attributable to WESCO International, Inc.	197.1		181.2
Less: Preferred stock dividends	14.4		14.4
Net income attributable to common stockholders	$	182.7	$	166.8
Other comprehensive income:
Foreign currency translation adjustments and other	17.0		31.6
Comprehensive income attributable to common stockholders	$	199.7	$	198.4
Earnings per share attributable to common stockholders
Basic	$	3.58	$	3.30
Diluted	$	3.48	$	3.19

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 millions)

(unaudited)

	Three Months Ended
	March 31
	2023		2022
Operating activities:
Net income	$	197.2	$	181.6
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	44.4		47.0
Stock-based compensation expense	11.7		8.9
Amortization of debt discount and debt issuance costs	3.6		4.6
Other operating activities, net	0.3		1.5
Deferred income taxes	11.6		(4.5)
Changes in assets and liabilities:
Trade accounts receivable, net	(133.5)		(324.6)
Other accounts receivable	91.5		17.8
Inventories	(223.8)		(214.2)
Other current and noncurrent assets	(25.2)		(34.2)
Accounts payable	(86.5)		200.0
Accrued payroll and benefit costs	(149.6)		(135.9)
Other current and noncurrent liabilities	2.9		80.0
Net cash used in operating activities	(255.4)		(172.0)
Investing activities:
Capital expenditures	(13.9)		(15.2)
Other investing activities, net	1.3		0.1
Net cash used in investing activities	(12.6)		(15.1)
Financing activities:
Proceeds (repayments) of short-term debt, net	(4.8)		1.5
Repayment of 5.50% Anixter Senior Notes due 2023 (Note 8)	(58.6)		—
Proceeds from issuance of long-term debt	968.3		982.3
Repayments of long-term debt	(723.9)		(792.5)
Payments for taxes related to net-share settlement of equity awards	(51.6)		(16.8)
Payment of common stock dividends	(19.2)		—
Payment of preferred stock dividends	(14.4)		(14.4)
Other financing activities, net	(7.2)		7.1
Net cash provided by financing activities	88.6		167.2
Effect of exchange rate changes on cash and cash equivalents	1.2		8.8
Net change in cash and cash equivalents	(178.2)		(11.1)
Cash and cash equivalents at the beginning of period	527.3		212.6
Cash and cash equivalents at the end of period	$	349.1	$	201.5
Supplemental disclosures:
Cash paid for interest	$	37.6	$	8.9
Cash paid for income taxes	$	36.4	$	27.8
Right-of-use assets obtained in exchange for new operating lease liabilities	$	59.9	$	79.1

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 millions, 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, 2022	$	0.7	68,535,704	$	—	4,339,431	$	—	21,612	$	2,005.4	$	3,795.0	$	(969.1)	(22,115,653)	$	(4.7)	$	(377.7)
Exercise of stock-based awards	—		811,309							0.3				(12.9)		(79,817)
Stock-based compensation expense										11.7
Tax withholding related to vesting of restricted stock units and retirement of common stock	—		(236,953)							(14.2)		(24.5)
Noncontrolling interests																	0.1
Net income attributable to WESCO International, Inc.												197.1
Common stock dividends												(19.2)
Preferred stock dividends												(14.4)
Translation adjustments and other										0.1		(1.0)							17.0
Balance, March 31, 2023	$	0.7	69,110,060	$	—	4,339,431	$	—	21,612	$	2,003.3	$	3,933.0	$	(982.0)	(22,195,470)	$	(4.6)	$	(360.7)

				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	$	0.7	68,162,297	$	—	4,339,431	$	—	21,612	$	1,969.3	$	3,004.7	$	(956.2)	(22,026,922)	$	(6.3)	$	(236.0)
Exercise of stock-based awards	—		365,833							—				(0.6)		(858)
Stock-based compensation expense										8.9
Tax withholding related to vesting of restricted stock units and retirement of common stock	—		(129,869)							(7.8)		(8.1)
Noncontrolling interests																	0.4
Net income attributable to WESCO International, Inc.												181.2
Preferred stock dividends												(14.4)
Translation adjustments and other																			31.6
Balance, March 31, 2022	$	0.7	68,398,261	$	—	4,339,431	$	—	21,612	$	1,970.4	$	3,163.4	$	(956.8)	(22,027,780)	$	(5.9)	$	(204.4)

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

6

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, 2022, as filed with the SEC on February 21, 2023. The Condensed Consolidated Balance Sheet at December 31, 2022 was derived from the audited Consolidated Financial Statements as of that date, but does not include all the disclosures required by accounting principles generally accepted in the United States of America.

The unaudited Condensed Consolidated Balance Sheet as of March 31, 2023, the unaudited Condensed Consolidated Statements of Income and Comprehensive Income, the unaudited Condensed Consolidated Statements of Stockholders' Equity, and the unaudited Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2023, and 2022, 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 September 2022, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“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. The Company adopted this ASU in the first quarter of 2023, except for the amendment on rollforward information, which the Company will begin disclosing in its Annual Report on Form 10-K for the fiscal year ending December 31, 2023. The adoption of this ASU resulted in additional disclosure of the Company's supplier finance program, as described below.

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.

Supplier Finance Programs

The Company has a supplier finance program that is administered by an intermediary. Under this arrangement, participating suppliers may elect to receive early payment of invoices that have been confirmed by the Company, less an interest deduction, which is paid to the supplier by a third-party finance provider. Wesco agrees to pay the stated amount of confirmed invoices in full on the original due date of the invoices, which is typically within 45 to 90 days of the invoice date, regardless of whether the supplier elects to receive early payment from the third-party finance provider. The Company does not provide assets pledged as security or other forms of guarantees to the finance provider or intermediary under this arrangement. As of March 31, 2023 and December 31, 2022, the amounts due to suppliers that participate in the Company's supplier finance program were approximately $30.0 million and $30.7 million, respectively, which are included in accounts payable in the Condensed Consolidated Balance Sheet.

7

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 operate in the United States, Canada and various other countries.

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

	Three Months Ended
	March 31
(In millions)	2023		2022
Electrical & Electronic Solutions	$	2,135.1	$	2,090.0
Communications & Security Solutions	1,732.0		1,434.2
Utility & Broadband Solutions	1,654.8		1,408.0
Total by segment	$	5,521.9	$	4,932.2

	Three Months Ended
	March 31
(In millions)	2023		2022
United States	$	4,090.5	$	3,654.4
Canada	759.4		715.0
Other International(1)	672.0		562.8
Total by geography(2)	$	5,521.9	$	4,932.2

(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 March 31, 2023 and December 31, 2022, $112.2 million and $99.6 million, respectively, of deferred revenue was recorded as a component of other current liabilities in the Condensed Consolidated Balance Sheets. The Company recognized $21.0 million of revenue during the three months ended March 31, 2023 that was included in the deferred revenue balance as of December 31, 2022. The amount of revenue recognized during the three months ended March 31, 2022 that was deferred as of December 31, 2021 was not material.

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 March 31, 2023 and December 31, 2022, the Company had contract assets of $34.8 million and $27.5 million, respectively, resulting from contracts 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 March 31, 2023 and 2022 by approximately $96.5 million and $95.1 million, respectively. The variable consideration for the three months ended March 31, 2022 reflects an adjustment that reduced the previously disclosed amount by $20.1 million. As of March 31, 2023 and December 31, 2022, the Company's estimated product return obligation was $43.9 million and $46.5 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 $76.9 million and $67.6 million for the three months ended March 31, 2023 and 2022, respectively.

8

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

4. ACQUISITIONS

Rahi Systems Holdings, Inc.

On November 1, 2022, through its wholly-owned subsidiary WESCO Distribution, Inc. (“Wesco Distribution”), the Company acquired 100% of the equity securities of Rahi Systems Holdings, Inc. (“Rahi Systems” or “Rahi”). Headquartered in Fremont, California, Rahi Systems is a leading provider of global hyperscale data center solutions with over 900 employees in 25 countries. Rahi's expertise with complex information technology projects and global presence strengthen Wesco's data center solution offerings. Wesco Distribution funded the purchase price paid at closing with cash on hand as well as borrowings under its accounts receivable securitization and revolving credit facilities.

Since the initial measurement of the identified assets acquired and liabilities assumed, the Company has recorded adjustments to inventories of $25.4 million and accounts payable of $28.0 million. The net impact of these adjustments was an increase to goodwill of $2.6 million.

The estimated fair values of assets acquired and liabilities assumed are based on preliminary calculations and valuations using estimates and assumptions at the time of acquisition. As the Company obtains additional information during the measurement period (not to exceed one year from the acquisition date), estimates and assumptions for the preliminary purchase consideration allocations may change materially.

The results of operations of Rahi Systems are included in Wesco's unaudited condensed consolidated financial statements beginning on November 1, 2022, the acquisition date. For the three months ended March 31, 2023, the condensed consolidated statement of income includes $136.3 million of net sales and an immaterial amount of income from operations for Rahi Systems. The Company has not presented supplemental pro forma revenue and earnings of the combined business as the acquisition of Rahi Systems is not material to Wesco's unaudited condensed consolidated financial statements.

5. GOODWILL AND INTANGIBLE ASSETS

The following table sets forth the changes in the carrying value of goodwill by reportable segment for the period presented:

	Three Months Ended
	March 31, 2023
	EES		CSS		UBS		Total
	(In millions)
Beginning balance, January 1	$	825.5	$	1,208.9	$	1,206.5	$	3,240.9
Foreign currency exchange rate changes	1.3		(0.7)		0.7		1.3
Adjustments to goodwill for acquisitions(1)	—		2.6		—		2.6
Ending balance, March 31	$	826.8	$	1,210.8	$	1,207.2	$	3,244.8

(1)    Reflects the effect on goodwill of adjustments to the assets acquired and liabilities assumed in the acquisition of Rahi Systems since their initial measurement, which is part of the CSS segment, as described in Note 4, "Acquisitions".

The components of intangible assets are as follows:

		As of
		March 31, 2023						December 31, 2022
	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 millions)
Trademarks	Indefinite	$	792.2	$	—	$	792.2	$	792.1	$	—	$	792.1
Customer relationships	10 - 20	1,516.6		(399.3)		1,117.3		1,516.0		(377.6)		1,138.4
Distribution agreements	15 - 19	29.2		(24.8)		4.4		29.2		(24.4)		4.8
Trademarks	5 and 12	15.5		(7.9)		7.6		15.5		(7.4)		8.1
		$	2,353.5	$	(432.0)	$	1,921.5	$	2,352.8	$	(409.4)	$	1,943.4

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

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

Amortization expense related to intangible assets totaled $22.0 million and $25.7 million for the three months ended March 31, 2023 and 2022, 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 millions)
2023	$	66.6
2024	86.1
2025	83.0
2026	77.7
2027	74.8
Thereafter	741.1

6. STOCK-BASED COMPENSATION

Wesco’s stock-based compensation awards consist 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 at least an annual basis. 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 that were granted under the Company’s 1999 Long-Term Incentive Plan, as amended and restated, vest fully on the third anniversary of the date of grant. The special award described below vests in tranches. Restricted stock units awarded under the WESCO International, Inc. 2021 Omnibus Incentive Plan, which was adopted on May 27, 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 vested in tranches of 30% on each of the first and second anniversaries of the grant date and will vest 40% on the third anniversary of the grant date, subject to continued employment through the applicable anniversary date.

Performance-based awards 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.

10

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

During the three months ended March 31, 2023 and 2022, Wesco granted the following stock options, restricted stock units, and performance-based awards at the following weighted-average fair values:

	Three Months Ended
	March 31, 2023		March 31, 2022
Stock options granted	75,182		89,550
Weighted-average fair value	$	76.77	$	57.26
Restricted stock units granted	170,569		224,946
Weighted-average fair value	$	171.03	$	122.11
Performance-based awards granted(1)	208,371		83,991
Weighted-average fair value(1)	$	85.94	$	122.09

(1)    As described further below, the three months ended March 31, 2023 includes performance-based awards granted in February 2020 for which actual achievement levels were certified in February 2023.

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

	Three Months Ended
	March 31, 2023		March 31, 2022
Risk free interest rate	4.1	%	1.9	%
Expected life (in years)	5		7
Expected volatility	50	%	43	%
Expected dividend yield	0.88	%	n/a

The risk-free interest rate is based on the U.S. Treasury Daily Yield Curve rate as of the grant date. The expected life is based on historical exercise experience, 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, and the expected dividend yield is based on the calculated yield on the Company's common stock at date of grant using the current fiscal year projected dividend distribution rate. The Company did not pay dividends to holders of its common stock during the three months ended March 31, 2022.

The following table sets forth a summary of stock options and related information for the three months ended March 31, 2023:

	Awards	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value (In millions)
Outstanding at December 31, 2022	87,347	$	121.55
Granted	75,182	170.04
Exercised	(1,279)	122.09
Forfeited	—	—
Outstanding at March 31, 2023	161,250	$	144.15	9.4	$	2.9
Exercisable at March 31, 2023	27,329	$	122.09	8.9	$	0.9

For the three months ended March 31, 2023, the aggregate intrinsic value of stock options exercised during such period was not material.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

The following table sets forth a summary of stock-settled stock appreciation rights and related information for the three months ended March 31, 2023:

	Awards	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value (In millions)
Outstanding at December 31, 2022	1,248,115	$	62.02
Granted	—	—
Exercised	(339,649)	68.51
Forfeited	(638)	72.15
Outstanding at March 31, 2023	907,828	$	59.59	5.6	$	86.2
Exercisable at March 31, 2023	865,198	$	58.72	5.5	$	82.9

For the three months ended March 31, 2023, the aggregate intrinsic value of stock-settled stock appreciation rights exercised during such period was $31.6 million.

The following table sets forth a summary of restricted stock units and related information for the three months ended March 31, 2023:

	Awards	Weighted- Average Fair Value
Unvested at December 31, 2022	774,233	$	73.79
Granted	170,569	171.03
Vested	(323,156)	72.05
Forfeited	(184)	102.64
Unvested at March 31, 2023	621,462	$	101.38

The following table sets forth a summary of performance-based awards and related information for the three months ended March 31, 2023:

	Awards	Weighted- Average Fair Value
Unvested at December 31, 2022	335,329	$	75.26
Granted(1)	208,371	85.94
Vested	(289,394)	48.32
Forfeited	—	—
Unvested at March 31, 2023	254,306	$	114.66

(1)    Includes 63,098 performance-based awards granted in February 2023 with a fair value of $171.96 and three-year performance period ending December 31, 2025, and 144,697 performance-based awards granted in February 2020 with a fair value of $48.32 and three-year performance period ended December 31, 2022 for which actual achievement levels were certified in February 2023.

Wesco recognized $11.7 million and $8.9 million of non-cash stock-based compensation expense for the three months ended March 31, 2023 and 2022, respectively, which is included in selling, general and administrative expenses for such periods. As of March 31, 2023, there was $85.2 million of total unrecognized compensation expense related to non-vested stock-based compensation arrangements for all awards previously made of which approximately $35.1 million is expected to be recognized over the remainder of 2023, $31.5 million in 2024, $16.7 million in 2025 and $1.9 million in 2026.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

7. 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 computation of basic and diluted earnings per share for the periods presented:

	Three Months Ended
	March 31
(In millions, except per share data)	2023		2022
Net income attributable to WESCO International, Inc.	$	197.1	$	181.2
Less: Preferred stock dividends	14.4		14.4
Net income attributable to common stockholders	$	182.7	$	166.8
Weighted-average common shares outstanding used in computing basic earnings per share	51.0		50.6
Common shares issuable upon exercise of dilutive equity awards	1.5		1.6
Weighted-average common shares outstanding and common share equivalents used in computing diluted earnings per share	52.5		52.2
Earnings per share attributable to common stockholders
Basic	$	3.58	$	3.30
Diluted	$	3.48	$	3.19

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 months ended March 31, 2023 and 2022, there were approximately 0.4 million and 0.1 million antidilutive shares, respectively.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

8. DEBT

The following table sets forth Wesco's outstanding indebtedness:

	As of
	March 31, 2023		December 31, 2022
	(In millions)
International lines of credit	$	2.2	$	7.1
Accounts Receivable Securitization Facility	1,613.0		1,535.0
Revolving Credit Facility	1,189.8		1,023.6
5.50% Anixter Senior Notes due 2023	—		58.6
6.00% Anixter Senior Notes due 2025	4.2		4.2
7.125% Senior Notes due 2025	1,500.0		1,500.0
7.250% Senior Notes due 2028, less debt discount of $6.5 and $6.8 in 2023 and 2022, respectively	1,318.5		1,318.2
Finance lease obligations	22.6		20.6
Total debt	5,650.3		5,467.3
Plus: Fair value adjustments to the Anixter Senior Notes	0.1		0.3
Less: Unamortized debt issuance costs	(47.7)		(51.1)
Less: Short-term debt and current portion of long-term debt(1)	(7.6)		(70.5)
Total long-term debt	$	5,595.1	$	5,346.0

(1)    As of December 31, 2022, short-term debt and current portion of long-term debt included the $58.6 million aggregate principal amount of the Company's 5.50% Anixter Senior Notes due 2023, which matured on March 1, 2023.

5.50% Anixter Senior Notes due 2023

On March 1, 2023, Wesco Distribution repaid the $58.6 million aggregate principal amount of its 5.50% Anixter Senior Notes due 2023 plus accrued interest up to, but not including, the maturity date. The repayment was funded with borrowings under the Company's Revolving Credit Facility and had no impact on the Company's results of operations.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

9. EMPLOYEE BENEFIT PLANS

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

	Three Months Ended
(In millions)	March 31, 2023		March 31, 2022		March 31, 2023		March 31, 2022		March 31, 2023		March 31, 2022
	Domestic Plans(1)				Foreign Plans(2)				Total
Service cost	$	—	$	—	$	1.2	$	2.2	$	1.2	$	2.2
Interest cost	2.6		2.1		2.8		2.3		5.4		4.4
Expected return on plan assets	(2.4)		(3.5)		(3.0)		(4.3)		(5.4)		(7.8)
Recognized actuarial gain(3)	—		—		(0.3)		(0.2)		(0.3)		(0.2)
Net periodic pension (benefit) cost	$	0.2	$	(1.4)	$	0.7	$	—	$	0.9	$	(1.4)

(1)    Defined as the Anixter Inc. Pension Plan, Anixter Inc. Executive Benefit Plan, and the Anixter Inc. Supplemental Executive Retirement Plan.

(2)    Defined as the EECOL Electric ULC Retirement Plan, the EECOL Electric ULC Supplemental Executive Retirement Plan, the Pension Plan for Employees of Anixter Canada Inc., and various defined benefit pension plans covering employees of foreign subsidiaries in Europe.

(3)    For the three months ended March 31, 2023 and 2022, no material amounts were reclassified from accumulated other comprehensive income into net income.

Service cost is reported as a component of selling, general and administrative expenses. The other components of net periodic pension (benefit) cost totaling net benefits of $0.3 million and $3.6 million for the three months ended March 31, 2023 and 2022, respectively, are presented as components of other expense (income), net.

The Company expects to contribute approximately $7.0 million to its Foreign Plans in 2023, of which approximately $2.4 million was contributed during the three months ended March 31, 2023. The Company does not expect to make a contribution to its domestic qualified pension plan in 2023 due to its overfunded status.

Other Employee Benefit Plans

Wesco sponsors defined contribution retirement savings plans for the majority of its employees in the U.S. and certain employees in Canada, which provide employer contributions.

Wesco incurred charges of $21.4 million and $18.1 million for the three months ended March 31, 2023 and 2022, respectively, for its defined contribution 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 March 31, 2023 and December 31, 2022, the Company's obligation under the Wesco Deferred Compensation Plan was $24.7 million and $20.3 million, respectively, which is included in other noncurrent liabilities in the Condensed Consolidated Balance Sheets.

10. 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 other 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.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

The carrying value of Wesco's debt instruments with fixed interest rates was $2,822.8 million and $2,881.2 million as of March 31, 2023 and December 31, 2022, respectively. The estimated fair value of this debt was $2,896.8 million and $2,929.5 million as of March 31, 2023 and December 31, 2022, respectively. The reported carrying values of Wesco's other debt instruments, including those with variable interest rates, approximated their fair values as of March 31, 2023 and December 31, 2022.

The Company purchases foreign currency forward contracts to reduce 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 March 31, 2023 and December 31, 2022, foreign currency forward contracts were revalued at then-current foreign exchange rates with the changes in valuation reflected directly in other non-operating expense (income) in the Condensed Consolidated Statements of Income and Comprehensive Income offsetting the transaction gain (loss) recorded on foreign currency-denominated accounts. At March 31, 2023 and December 31, 2022, the gross and net notional amounts of foreign currency forward contracts outstanding were approximately $162.4 million and $172.8 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.

11. 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.

12. INCOME TAXES

The effective tax rate for the three months ended March 31, 2023 and 2022 was 18.3% and 17.2%, respectively. For the three months ended March 31, 2023 and 2022, the effective tax rate reflects discrete income tax benefits of $21.2 million and $5.8 million, respectively, resulting from the exercise and vesting of stock-based awards. For the three months ended March 31, 2022, the effective tax rate also reflects a discrete income tax benefit of $13.4 million resulting from a reduction to the valuation allowance recorded against foreign tax credit carryforwards. These discrete income tax benefits reduced the estimated annual effective tax rate in such periods by approximately 8.8 and 8.7 percentage points, respectively. The estimated annual effective tax rate differs from the federal statutory income tax rate due primarily to state income taxes and nondeductible expenses.

There have been no material adjustments to liabilities for uncertain tax positions since December 31, 2022.

13. 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.

16

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

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 millions)	Three Months Ended March 31, 2023
	EES		CSS		UBS		Total
Net sales	$	2,135.1	$	1,732.0	$	1,654.8	$	5,521.9
	Three Months Ended March 31, 2022
(In millions)	EES		CSS		UBS		Total
Net sales	$	2,090.0	$	1,434.2	$	1,408.0	$	4,932.2

(In millions)	Three Months Ended March 31, 2023
	EES			CSS			UBS
Adjusted EBITDA	$	183.0		$	155.5		$	187.7
Adjusted EBITDA Margin %	8.6		%	9.0		%	11.3		%
	Three Months Ended March 31, 2022
(In millions)	EES			CSS			UBS
Adjusted EBITDA	$	192.4		$	123.0		$	136.3
Adjusted EBITDA Margin %	9.2		%	8.6		%	9.7		%

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

	As of
	March 31, 2023
(In millions)	EES		CSS		UBS		Corporate(1)		Total
Total assets	$	4,490.9	$	5,586.0	$	4,038.1	$	856.2	$	14,971.2
	As of
	December 31, 2022
(In millions)	EES		CSS		UBS		Corporate(1)		Total
Total assets	$	4,480.4	$	5,504.0	$	3,827.4	$	999.9	$	14,811.7

(1)    Total assets for Corporate primarily consist of cash and cash equivalents, deferred income taxes, property, buildings and equipment, capitalized cloud computing arrangement costs, operating lease assets, and pension assets.

17

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS—(CONTINUED)

(unaudited)

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 March 31, 2023
(In millions)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	171.3		$	135.4		$	180.3		$	(304.3)	$	182.7
Net (loss) income attributable to noncontrolling interests	(0.1)			0.2			—			—		0.1
Preferred stock dividends	—			—			—			14.4		14.4
Provision for income taxes	—			—			—			44.1		44.1
Interest expense, net	—			—			—			95.0		95.0
Depreciation and amortization	9.9			18.0			6.0			10.5		44.4
Other expense, net	0.5			0.8			0.6			8.2		10.1
Stock-based compensation expense(1)	1.4			1.1			0.8			7.1		10.4
Merger-related and integration costs	—			—			—			19.5		19.5
Adjusted EBITDA	$	183.0		$	155.5		$	187.7		$	(105.5)	$	420.7
Adjusted EBITDA margin %	8.6		%	9.0		%	11.3		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the three months ended March 31, 2023 excludes $1.3 million that is included in merger-related and integration costs.

	Three Months Ended March 31, 2022
(In millions)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	178.7		$	103.7		$	129.9		$	(245.5)	$	166.8
Net income attributable to noncontrolling interests	0.2			—			—			0.2		0.4
Preferred stock dividends	—			—			—			14.4		14.4
Provision for income taxes	—			—			—			37.7		37.7
Interest expense, net	—			—			—			63.6		63.6
Depreciation and amortization	12.0			18.1			5.8			11.1		47.0
Other (income) expense, net	(0.1)			0.3			—			0.9		1.1
Stock-based compensation expense(1)	1.6			0.9			0.6			4.4		7.5
Merger-related and integration costs	—			—			—			25.6		25.6
Adjusted EBITDA	$	192.4		$	123.0		$	136.3		$	(87.6)	$	364.1
Adjusted EBITDA margin %	9.2		%	8.6		%	9.7		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the three months ended March 31, 2022 excludes $1.4 million that 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 earnings before interest, taxes, depreciation and amortization 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.

18

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 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, 2022. 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, 2022, 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, 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 helpful to users of our financial statements 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 users 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 approximately 20,000 people, maintain relationships with more than 50,000 suppliers, and serve approximately 150,000 customers worldwide. With millions of products, end-to-end supply chain services, and leading 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.

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 approximately 7,000 employees supporting customers in more than 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.

Communications & Security Solutions

The CSS segment, with over 4,600 employees supporting customers in more than 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.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

Utility & Broadband Solutions

The UBS segment, with over 2,700 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 Wesco's 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 three months of 2023 compared to the first three months of 2022 reflect double-digit sales growth driven by the benefits of price inflation and higher volumes, increased scale, secular demand trends and execution of our cross-sell program, as well as margin expansion and the realization of integration synergies, partially offset by higher payroll and payroll-related expenses, costs to operate our facilities, along with expenses associated with our digital transformation initiatives.

Net sales for the first three months of 2023 increased $0.6 billion, or 12.0%, over the corresponding prior year period. The increase reflects price inflation and volume growth, secular demand trends, execution of our cross-sell program, and an improving supply chain, as well as the acquisition of Rahi Systems Holdings, Inc. (“Rahi Systems”), which closed in November of 2022, partially offset by the negative impact of fluctuations in foreign exchange rates. Cost of goods sold as a percentage of net sales was 78.1% and 78.7% for the first three months of 2023 and 2022, respectively. The improvement of 60 basis points reflects our continued focus on value-driven pricing and pass-through of inflationary costs, along with the continued momentum of our margin improvement program.

Income from operations was $346.4 million for the first three months of 2023 compared to $284.0 million for the first three months of 2022, an increase of $62.4 million, or 22.0%. Income from operations as a percentage of net sales was 6.3% for the current three-month period, compared to 5.8% for the first three months of the prior year. Income from operations for the first three months of 2023 includes merger-related and integration costs of $19.5 million. Adjusted for this amount, income from operations was 6.6% of net sales for the first quarter of 2023. For the first three months of 2022, income from operations was 6.4% of net sales, as adjusted for merger-related and integration costs of $25.6 million and accelerated trademark amortization expense of $5.3 million. For the three months ended March 31, 2023, income from operations improved compared to the prior year due to sales growth and lower cost of goods sold as a percentage of net sales, as well as the realization of integration synergies and a reduction to incentive compensation expense. Income from operations for the first three months of 2023 was negatively impacted by higher salaries and benefits due to wage inflation and increased headcount, including the impact of the Rahi Systems acquisition, as well as an increase in volume-related costs such as commissions and transportation. The costs to operate our facilities also unfavorably affected income from operations. In addition, digital transformation initiatives contributed to higher expenses in the first three months of 2023.

Earnings per diluted share for the first three months of 2023 was $3.48, based on 52.5 million diluted shares, compared to $3.19 for the first three months of 2022, based on 52.2 million diluted shares, an increase of 9.1%. Adjusted for merger-related and integration costs and the related income tax effect, earnings per diluted share for the first three months of 2023 was $3.75. Adjusted for merger-related and integration costs, accelerated trademark amortization expense, and the related income tax effects, earnings per diluted share for the first three months of 2022 was $3.63. Adjusted earnings per diluted share increased 3.3% year-over-year.

Our industry and the broader economy have experienced supply chain challenges, including product delays and backlogged orders, shortages in raw materials and components, labor shortages, transportation challenges, and higher costs. During the first three months of 2023, we continued to experience strong demand from many of our customers, along with variability in the amount of time it takes to receive products from our suppliers. We are aggressively managing supply chain issues and have experienced some improvements, although we anticipate that supply chain uncertainty and inflationary pressures will continue. 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.

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Cash Flow

Operating cash flow for the first three months of 2023 was an outflow of $255.4 million. Net cash used in operating activities included net income of $197.2 million and non-cash adjustments to net income totaling $71.6 million, which were primarily comprised of depreciation and amortization of $44.4 million, stock-based compensation expense of $11.7 million, deferred income taxes of $11.6 million, and amortization of debt discount and debt issuance costs of $3.6 million. Operating cash flow also included changes in assets and liabilities of $524.2 million, which were primarily comprised of an increase in inventories of $223.8 million as shipments from suppliers have accelerated due to an improving supply chain. An increase in trade accounts receivable of $133.5 million and a decrease in accounts payable of $86.5 million due to the timing of receipts from customers and payments to suppliers, respectively, also contributed to the net cash outflow. Additionally, the payment of management incentive compensation earned in 2022 resulted in a cash outflow of approximately $154.1 million in the first quarter of 2023.

Investing activities primarily included $13.9 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 net borrowings of $166.6 million related to our revolving credit facility (the "Revolving Credit Facility"), net borrowings of $78.0 million related to our accounts receivable securitization facility (the "Receivables Facility"), and the repayment of our $58.6 million aggregate principal amount of 5.50% Anixter Senior Notes due 2023, which matured on March 1, 2023. Financing activities for the first three months of 2023 also included $19.2 million and $14.4 million of dividends paid to holders of our common stock and Series A Preferred Stock, respectively, and $51.6 million of payments for taxes related to the exercise and vesting of stock-based awards.

Financing Availability

As of March 31, 2023, we had $500.3 million in total available borrowing capacity under our Revolving Credit Facility and no available borrowing capacity under our Receivables Facility. The Revolving Credit Facility and the Receivables Facility mature in March 2027 and March 2025, respectively. As of March 31, 2023, we also had $12.6 million of borrowing capacity available under our international lines of credit that did not directly reduce availability under the Revolving Credit Facility.

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Results of Operations

First Quarter of 2023 versus First Quarter of 2022

Net Sales

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

	Three Months Ended				Growth/(Decline)
	March 31, 2023		March 31, 2022		Reported	Acquisition Impact		Foreign Exchange Impact		Workday Impact		Organic Sales Growth
	(In millions)
EES	$	2,135.1	$	2,090.0	2.2%	—	%	(1.7)	%	—	%	3.9	%
CSS	1,732.0		1,434.2		20.8%	9.5	%	(2.0)	%	—	%	13.3	%
UBS	1,654.8		1,408.0		17.5%	—	%	(0.7)	%	—	%	18.2	%
Total net sales	$	5,521.9	$	4,932.2	12.0%	2.8	%	(1.6)	%	—	%	10.8	%

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 $5.5 billion for the first quarter of 2023 compared to $4.9 billion for the first quarter of 2022, an increase of 12.0%. The increase primarily reflects price inflation and volume growth, secular demand trends, execution of our cross-sell program, and an improving supply chain. Organic sales for the first quarter of 2023 grew by 10.8% as the acquisition of Rahi Systems, which closed in November of 2022, positively impacted reported net sales by 2.8%, while fluctuations in foreign exchange rates negatively impacted reported net sales by 1.6%. All segments reported higher sales versus the prior year period, as described below. For the three months ended March 31, 2023, we estimate that pricing related to inflation contributed five percentage points to our net sales growth rate.

EES reported net sales of $2,135.1 million for the first quarter of 2023 compared to $2,090.0 million for the first quarter of 2022, an increase of 2.2%. Organic sales for the first quarter of 2023 grew by 3.9% as fluctuations in foreign exchange rates negatively impacted reported net sales by 1.7%. The year-over-year increase in organic sales reflects continued momentum in our industrial business driven by strength in the automation, petrochemical, and metals and mining end markets, as well as growth in non-residential construction. These positive factors were partially offset by a transfer of certain customer accounts to the CSS segment, which negatively impacted reported net sales for EES by approximately 2%, as well as lower sales in certain original equipment manufacturer end markets.

CSS reported net sales of $1,732.0 million for the first quarter of 2023 compared to $1,434.2 million for the first quarter of 2022, an increase of 20.8%. Organic sales for the first quarter of 2023 grew by 13.3% as the acquisition of Rahi Systems in the fourth quarter of 2022 positively impacted reported net sales by 9.5%, while fluctuations in foreign exchange rates negatively impacted reported net sales by 2.0%. The year-over-year increase in organic sales reflects growth in our security solutions and network infrastructure businesses, as well as the benefits of cross selling and improvements in supply chain constraints. The transfer of certain customer accounts from the EES segment also positively impacted reported net sales for CSS by approximately 2%.

UBS reported net sales of $1,654.8 million for the first quarter of 2023 compared to $1,408.0 million for the first quarter of 2022, an increase of 17.5%. Organic sales for the first quarter of 2023 grew by 18.2% as fluctuations in foreign exchange rates negatively impacted reported net sales by 0.7%. The year-over-year increase in organic sales reflects significant price inflation, secular trends in the utility business that are driving growth, as well as expansion in our integrated supply business. These positive factors were partially offset by lower sales in our broadband business due to certain customers depleting existing inventories.

Cost of Goods Sold

Cost of goods sold for the first quarter of 2023 was $4.3 billion compared to $3.9 billion for the first quarter of 2022, an increase of $0.4 billion. Cost of goods sold as a percentage of net sales was 78.1% and 78.7% for the first quarter of 2023 and 2022, respectively. The favorable reduction of 60 basis points reflects our continued focus on value-driven pricing and pass-through of inflationary costs, along with the continued momentum of our margin improvement program.

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Selling, General and Administrative Expenses

Selling, general and administrative ("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 quarter of 2023 totaled $817.7 million versus $718.1 million for the first quarter of 2022, an increase of $99.6 million, or 13.9%. As a percentage of net sales, SG&A expenses were 14.8% and 14.6% for the first quarter of 2023 and 2022, respectively. SG&A expenses for the first quarter of 2023 and 2022 include merger-related and integration costs of $19.5 million and $25.6 million, respectively. Adjusted for these amounts, SG&A expenses were $798.2 million, or 14.5% of net sales, for the first quarter of 2023 and $692.5 million, or 14.0% of net sales, for the first quarter of 2022.

SG&A payroll and payroll-related expenses for the first quarter of 2023 of $512.2 million increased by $51.3 million compared to the same period in 2022 primarily as a result of higher salaries and benefits due to wage inflation and increased headcount, including the impact of the Rahi Systems acquisition, as well as an increase in commissions driven by sales growth. These increases were partially offset by a reduction to incentive compensation expense.

SG&A expenses not related to payroll and payroll-related costs for the first quarter of 2023 were $305.5 million compared to $257.2 million for the same period in 2022. The increase of $48.3 million primarily reflects higher costs to operate our facilities and volume-related costs such as transportation driven by sales growth. In addition, digital transformation initiatives contributed to higher expenses in the first quarter of 2023, including those related to professional and consulting fees. These increases were partially offset by the realization of integration cost synergies.

Depreciation and Amortization

Depreciation and amortization decreased $2.6 million to $44.4 million for the first quarter of 2023 compared to $47.0 million for the first quarter of 2022. The first quarter of 2022 includes $5.3 million of accelerated amortization expense resulting from changes in the estimated useful lives of certain legacy trademarks that are migrating to our master brand architecture.

Income from Operations

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

	Three Months Ended March 31, 2023
(In millions)	EES		CSS		UBS		Corporate		Total
Income from operations	$	171.7	$	136.4	$	180.9	$	(142.6)	$	346.4
	Three Months Ended March 31, 2022
(In millions)	EES		CSS		UBS		Corporate		Total
Income from operations	$	178.8	$	104.0	$	129.9	$	(128.7)	$	284.0

Income from operations was $346.4 million for the first quarter of 2023 compared to $284.0 million for the first quarter of 2022. The increase of $62.4 million, or 22.0%, reflects sales growth and lower cost of goods sold as a percentage of net sales, along with the realization of integration synergies. These favorable factors were partially offset by higher SG&A expenses, as described above.

EES reported income from operations of $171.7 million for the first quarter of 2023 compared to $178.8 million for the first quarter of 2022. The decrease of $7.1 million, or 4.0%, is primarily the result of lower cost of goods sold as a percentage of net sales that was more than offset by higher SG&A expenses.

CSS reported income from operations of $136.4 million for the first quarter of 2023 compared to $104.0 million for the first quarter of 2022. The increase of $32.4 million, or 31.2%, primarily reflects the factors impacting the overall business, as described above.

UBS reported income from operations of $180.9 million for the first quarter of 2023 compared to $129.9 million for the first quarter of 2022. The increase of $51.0 million, or 39.3%, primarily reflects the factors impacting the overall business, as described above.

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Corporate, which primarily incurs costs related to treasury, tax, information technology, legal and other centralized functions, recognized net expenses of $142.6 million for the first quarter of 2023 compared to $128.7 million for the first quarter of 2022. The increase of $13.9 million primarily reflects higher salaries and benefits due to wage inflation and increased headcount, as well as an increase in information technology expenses related to our digital transformation initiatives.

Interest Expense, net

Net interest expense totaled $95.0 million for the first quarter of 2023 compared to $63.6 million for the first quarter of 2022. The increase of $31.4 million, or 49.4%, reflects higher borrowings and an increase in variable interest rates.

Other Expense, net

Other non-operating expense totaled $10.1 million for the first quarter of 2023 compared to $1.1 million for the first quarter of 2022. As disclosed in Note 9, "Employee Benefit Plans" of our Notes to the unaudited Condensed Consolidated Financial Statements, we recognized net benefits of $0.3 million and $3.6 million associated with the non-service cost components of net periodic pension (benefit) cost for the three months ended March 31, 2023 and 2022, respectively. Due to fluctuations in the U.S. dollar against certain foreign currencies, we recognized a net foreign currency exchange loss of $9.5 million for the first quarter of 2023 compared to a net loss of $3.6 million for the first quarter of 2022.

Income Taxes

The provision for income taxes was $44.1 million for the first quarter of 2023 compared to $37.7 million for the corresponding quarter of the prior year, resulting in effective tax rates of 18.3% and 17.2%, respectively. The current quarter and the comparable prior year period both reflect discrete income tax benefits resulting from the exercise and vesting of stock-based awards. The first quarter of 2022 also reflects a discrete income tax benefit resulting from a reduction to the valuation allowance recorded against foreign tax credit carryforwards.

Net Income and Earnings per Share

Net income and earnings per diluted share attributable to common stockholders were $182.7 million and $3.48, respectively, for the first quarter of 2023 compared to $166.8 million and $3.19, respectively, for the first quarter of 2022. Adjusted for merger-related and integration costs and the related income tax effect, net income and earnings per diluted share attributable to common stockholders were $196.9 million and $3.75, respectively, for the three months ended March 31, 2023. 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 $189.7 million and $3.63, respectively, for the three months ended March 31, 2022.

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WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

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
	March 31, 2023		March 31, 2022
Adjusted SG&A Expenses:	(In millions)
Selling, general and administrative expenses	$	817.7	$	718.1
Merger-related and integration costs	(19.5)		(25.6)
Adjusted selling, general and administrative expenses	$	798.2	$	692.5
Adjusted Income from Operations:
Income from operations	$	346.4	$	284.0
Merger-related and integration costs	19.5		25.6
Accelerated trademark amortization	—		5.3
Adjusted income from operations	$	365.9	$	314.9
Adjusted Provision for Income Taxes:
Provision for income taxes	$	44.1	$	37.7
Income tax effect of adjustments to income from operations(1)	5.3		8.0
Adjusted provision for income taxes	$	49.4	$	45.7

(1)    The adjustments to income from operations have been tax effected at rates of approximately 27% and 26% for the three months ended March 31, 2023 and 2022, respectively.

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	Three Months Ended
Adjusted Earnings per Diluted Share:	March 31, 2023		March 31, 2022
(In millions, except per share data)
Adjusted income from operations	$	365.9	$	314.9
Interest expense, net	95.0		63.6
Other expense, net	10.1		1.1
Adjusted income before income taxes	260.8		250.2
Adjusted provision for income taxes	49.4		45.7
Adjusted net income	211.4		204.5
Net income attributable to noncontrolling interests	0.1		0.4
Adjusted net income attributable to WESCO International, Inc.	211.3		204.1
Preferred stock dividends	14.4		14.4
Adjusted net income attributable to common stockholders	$	196.9	$	189.7
Diluted shares	52.5		52.2
Adjusted earnings per diluted share	$	3.75	$	3.63

Note: For the three months ended March 31, 2023, SG&A expenses, income from operations, the provision for income taxes and earnings per diluted share have been adjusted to exclude merger-related and integration costs and the related income tax effects. For the three months ended March 31, 2022, SG&A 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.

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 March 31, 2023, we had $500.3 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 $154.5 million, provided liquidity of $654.8 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 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 March 31, 2023, approximately 50% 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, we expect that our excess liquidity will be directed primarily at debt reduction, integration activities, returning capital to shareholders through the payment of dividends and our existing share repurchase authorization, or potential acquisitions. 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 March 31, 2023.

We also measure our ability to meet our debt obligations based on our financial leverage ratio, which was 3.0 as of March 31, 2023 and 2.9 as of December 31, 2022.

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

	Twelve Months Ended
	March 31, 2023		December 31, 2022
(In millions of dollars, except ratio)
Net income attributable to common stockholders	$	818.9	$	803.1
Net income attributable to noncontrolling interests	1.3		1.7
Preferred stock dividends	57.4		57.4
Provision for income taxes	281.0		274.5
Interest expense, net	325.8		294.4
Depreciation and amortization	176.5		179.0
EBITDA	$	1,660.9	$	1,610.1
Other expense, net	16.0		7.0
Stock-based compensation expense	43.9		41.0
Merger-related and integration costs	61.4		67.5
Adjusted EBITDA	$	1,782.2	$	1,725.6
	As of
	March 31, 2023		December 31, 2022
Short-term debt and current portion of long-term debt, net	$	7.6	$	70.5
Long-term debt, net	5,595.1		5,346.0
Debt discount and debt issuance costs(1)	54.2		57.9
Fair value adjustments to Anixter Senior Notes due 2023 and 2025(1)	(0.1)		(0.3)
Total debt	5,656.8		5,474.1
Less: Cash and cash equivalents	349.1		527.3
Total debt, net of cash	$	5,307.7	$	4,946.8
Financial leverage ratio	3.0		2.9

(1)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 expense (income), non-cash stock-based compensation expense, and merger-related and integration costs.

Most of the undistributed earnings of our foreign subsidiaries have been taxed in the U.S. under either the one-time tax imposed 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 can maintain sufficient liquidity for our domestic operations and commitments without repatriating cash from our foreign 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 $1,725 million and the purchase limit under the Receivables Facility is $1,625 million. As of March 31, 2023, we had $1,189.8 million and $1,613.0 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

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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 March 31, 2023, there was $12.6 million of borrowing capacity available under the international lines of credit that did not directly reduce availability under the Revolving Credit Facility. As of March 31, 2023, we had $2.2 million outstanding under our international lines of credit.

As disclosed in Note 8, "Debt" of our Notes to the unaudited Condensed Consolidated Financial Statements, on March 1, 2023, we repaid the $58.6 million aggregate principal amount of our 5.50% Anixter Senior Notes due 2023. The repayment was funded with borrowings under our Revolving Credit Facility and had no impact on our results of operations.

For additional disclosure of our debt instruments, including our outstanding indebtedness as of March 31, 2023, see Note 8, "Debt" of our Notes to the unaudited Condensed Consolidated Financial Statements.

An analysis of cash flow for the first three months of 2023 and 2022 follows:

Operating Activities

Net cash used in operating activities for the first three months of 2023 totaled $255.4 million, compared to $172.0 million for the first three months of 2022. Net cash used in operating activities for the first three months of 2023 included net income of $197.2 million and non-cash adjustments to net income totaling $71.6 million, which were primarily comprised of depreciation and amortization of $44.4 million, stock-based compensation expense of $11.7 million, deferred income taxes of $11.6 million, and amortization of debt discount and debt issuance costs of $3.6 million. Other sources of cash in the first three months of 2023 included a decrease in other accounts receivable of $91.5 million due primarily to the collection of supplier volume rebates earned in 2022 in excess of income accrued during the current period. Primary uses of cash in the first three months of 2023 included an increase in inventories of $223.8 million as shipments from suppliers have accelerated due to an improving supply chain, a decrease in accrued payroll and benefit costs of $149.6 million resulting primarily from the payment of management incentive compensation earned in 2022, an increase in trade accounts receivable of $133.5 million and a decrease in accounts payable of $86.5 million due to the timing of receipts from customers and payments to suppliers, respectively, and an increase in other current and noncurrent assets of $25.2 million primarily due to an increase in capitalized costs associated with developing cloud computing arrangements to support our digital transformation initiatives.

Net cash used in operating activities for the first three months of 2022 totaled $172.0 million, which included net income of $181.6 million and non-cash adjustments to net income totaling $57.5 million, which were primarily comprised of depreciation and amortization of $47.0 million, stock-based compensation expense of $8.9 million, amortization of debt discount and debt issuance costs of $4.6 million, and deferred income taxes of $4.5 million. Other sources of cash in the first three months of 2022 included an increase in accounts payable of $200.0 million due to higher purchases of inventory, an increase in other current and noncurrent liabilities of $80.0 million primarily due to interest accrued on our 7.125% Senior Notes due 2025 and 7.250% Senior Notes due 2028, as well as an increase in accrued income taxes payable, and a decrease in other accounts receivable of $17.8 million due primarily to the collection of supplier volume rebates earned in 2021 in excess of income accrued during the first three months of 2022. Primary uses of cash in the first three months of 2022 included an increase in trade accounts receivable of $324.6 million resulting from higher sales in the latter part of the quarter, an increase in inventories of $214.2 million due to investments during the quarter to both address supply chain challenges and support our strong sales growth opportunities, a decrease in accrued payroll and benefit costs of $135.9 million resulting primarily from the payment of management incentive compensation earned in 2021, and an increase in other current and noncurrent assets of $34.2 million primarily due to an increase in capitalized costs associated with implementing cloud computing arrangements to support our digital transformation initiatives.

Investing Activities

Net cash used in investing activities for the first three months of 2023 was $12.6 million compared to $15.1 million during the first three months of 2022. Included in the first three months of 2023 was capital expenditures of $13.9 million compared to $15.2 million for the three month period ended March 31, 2022.

Financing Activities

Net cash provided by financing activities for the first three months of 2023 was $88.6 million, compared to $167.2 million for the first three months of 2022. During the first three months of 2023, financing activities were primarily comprised of net borrowings of $166.6 million related to our Revolving Credit Facility, net borrowings of $78.0 million related to our Receivables Facility, and the repayment of our $58.6 million aggregate principal amount of 5.50% Anixter Senior Notes due 2023. The first three months of 2023 also included $19.2 million and $14.4 million of dividends paid to holders of our common

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stock and Series A Preferred Stock, respectively, $51.6 million of payments for taxes related to the exercise and vesting of stock-based awards, and net repayments on our various international lines of credit of approximately $4.8 million.

During the first three months of 2022, financing activities were primarily comprised of net borrowings of $160.1 million related to our Revolving Credit Facility, and net borrowings of $30.0 million related to our Receivables Facility. The first three months of 2022 also included $14.4 million of dividends paid to holders of our Series A Preferred Stock, $16.8 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 $1.2 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, 2022.

Seasonality

Our operating results are not significantly affected by seasonal factors. Sales during the first and fourth quarters have historically been 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, 2022.

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 regarding business strategy, growth strategy, competitive strengths, productivity and profitability enhancement, competition, new product and service introductions and liquidity and capital resources, as well as statements regarding the expected benefits and costs of the transaction between Wesco and Anixter International Inc., including anticipated future financial and operating results, synergies, accretion and growth rates, and the combined company's plans, objectives and expectations. Such statements can generally be identified by the use of words such as "anticipate," "plan," "believe," "estimate," "intend," "expect," "project," and similar words, phrases or expressions or future or conditional verbs such as "could," "may," "should," "will," and "would," although not all forward-looking statements contain such words. 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.

Important factors that could cause actual results or events to differ materially from those presented or implied in the forward-looking statements include, among others, the failure to achieve the expected benefits of the transaction between Wesco and Anixter International Inc. or the anticipated benefits of Wesco's acquisition of Rahi Systems Holdings, Inc. in the expected timeframe or at all, unexpected costs or problems that may arise in successfully integrating the businesses of the companies, the impact of increased interest rates or borrowing costs, failure to adequately protect Wesco's intellectual property or successfully defend against infringement claims, failure to execute Wesco's environmental, social and governance (ESG) programs as planned, disruption of information technology systems or operations, natural disasters (including as a result of climate change), health epidemics, pandemics and other outbreaks (such as the ongoing COVID-19 pandemic, including any resurgences or new variants), supply chain disruptions, geopolitical issues, such as the impact of Russia's invasion of Ukraine, including the impact of sanctions or other actions taken by the U.S. or other countries against Russia (as well as those imposed on China), 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

29

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

the combined company's business, results of operations and financial condition. All such factors are difficult to predict and are beyond the 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, 2022 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, 2022, 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 March 31, 2023, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

30

WESCO INTERNATIONAL, INC. AND SUBSIDIARIES

PART II—OTHER INFORMATION

Item 1. Legal Proceedings.

As set forth in Note 11, "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.

There have been no material changes to 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, 2022.

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 March 31, 2023:

	Total Number of Shares Purchased (1)	Average Price Paid Per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (2)	Approximate Dollar Value of Shares That May Yet be Purchased Under the Plans or Programs (2)
Period					(In millions)
January 1 – January 31, 2023	1,627	$	137.20	—	$	988.9
February 1 – February 28, 2023	306,250	$	163.36	—	$	988.9
March 1 – March 31, 2023	8,924	$	157.21	—	$	988.9
Total	316,801	$	163.05	—

(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.

(2)    On June 1, 2022, Wesco announced that its Board of Directors authorized, on May 31, 2022, the repurchase of up to $1 billion of the Company's common stock and Series A Preferred Stock. The share repurchase authorization has no expiration date and may be modified, suspended, or terminated at any time without prior notice.

Item 6.    Exhibits.

(a)Exhibits

(10)    Material Contracts

(1) Letter agreement, dated October 20, 2020, memorializing terms of employment of Akash Khurana by WESCO International, Inc. (filed herewith)

(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)

32

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)

May 5, 2023	By:	/s/ David S. Schulz
(Date)		David S. Schulz
		Executive Vice President and Chief Financial Officer
		(Principal Financial Officer)

May 5, 2023	By:	/s/ Matthew S. Kulasa
(Date)		Matthew S. Kulasa
		Senior Vice President, Corporate Controller and Chief Accounting Officer
		(Principal Accounting Officer)

33

EX-10.1

WESCO International, Inc.

225 West Station Square Drive

Suite 700

Pittsburgh, Pennsylvania 15219

October 20, 2020

Akash Khurana

16110 Burberry Circle

Houston, Texas 77044

Dear Akash:

We are very excited about the transformational combination of WESCO International, Inc. (the "Company") and Anixter International Inc. ("Anixter"). It presents a once-in-a-lifetime opportunity to create the premier electrical, communications and utility distribution and supply chain solutions company in the world, and we believe that your major leadership role in the organization will be a key to its future success. Together, we can create tremendous value forour stockholders, our world-class suppliers and customers, and our employees. I am pleased toextend this offer for you to become the Executive Vice President, Chief Information & DigitalOfficer of our Company.

1. Employment Terms. The principal terms of your compensation and benefits in connection with your employment with the Company will be as set forth on Exhibit Ato this Letter (the "Term Sheet" and together with this Letter and Exhibit B hereto, this "Agreement"), subject to approval of WESCO's Compensation Committee. This offer is contingent upon successful completion of all our standard background checks and drug screening.

2. Restrictive Covenants. As a condition of your employment with the Company and your entitlement to receive the compensation and benefits set forth in the Term Sheet, you hereby acknowledge and agree that you shall be subject to the restrictive covenants set forth in Exhibit Bhereto (the "Restrictive Covenants").

3. Section 409A. It is intended that the payments and benefits provided under thisAgreement will be exempt from the application of, or comply with, the requirements of Section409A of the Code. This Agreement will be construed in a manner that effects such intent to the greatest extent possible. However, the Company shall not be held liable for any taxes, interests or penalties that you owe with respect to any payments or benefits provided under this Agreement. With respect to any amounts payable hereunder in installments, each installment shall be treated as a separate payment for purposes of Section 409A of the Code. For purposesof any payment due hereunder upon a termination of employment that is subject to the provisionsof Section 409A of the Code, such phrase or any similar phrase shall mean a "separation from service" as defined by the default provisions of Treasury Regulation 1.409A-1(h). Notwithstanding any other provision of this Agreement to the contrary, if you are a "specified employee" within the meaning of Section 409A of the Code (as determined in accordance with the methodology established by the Company), amounts that constitute "nonqualified deferred compensation" subject to Section 409A of the Code that would otherwise be payable by reason of your separation from service during the six-month period immediately following such separation from service shall instead be paid or provided on the first business day following the date that is six months following your separation from service. If you die following your separation from service and

prior to the payment of any amounts delayed on account of 409A of the Code, such amounts shall be paid to the personal representative of your estate within 30 days following the date of your death.

4. Governing Law. This Agreement shall be governed by and construed in accordance with the laws of the State of Delaware, without giving effect to any choice of law or conflicting provision or rule (whether of the State of Delaware or any other jurisdiction) that would cause the laws of any jurisdiction other than the State of Delaware to be applied. In furtherance of the foregoing, the internal laws of the State of Delaware will control the interpretation and construction of this Agreement, even if under such jurisdiction's choice of law or conflict of law analysis, the substantive law of some other jurisdiction would ordinarily apply.

5. Arbitration. Except with respect to claims for breach of the Restrictive Covenants, for which the Company may seek enforcement in any court having competent jurisdiction at its election, any dispute arising between you and the Company with respect to the validity, performance or interpretation of this Agreement shall be submitted to and determined in binding arbitration before a panel of three arbitrators in Pittsburgh, Pennsylvania, for resolution in accordance with the rules of the American Arbitration Association, modified to provide that the decision of the arbitrators shall be binding on the parties; shall be furnished in writing, separately and specifically stating the findings of fact and conclusions of law on which the decision is based; shall be kept confidential by the arbitrators and the parties; and shall be rendered within 60 days following the arbitrators being impaneled. You shall bear your, and the Company shall bear its, own costs and expenses associated with the arbitration. The arbitrators shall be selected in accordance with the rules of the American Arbitration Association.

6. Entire Agreement; Amendments. This Agreement represents the complete understanding between you and the Company regarding the subject matter of this Agreement. No amendment to this Agreement shall be binding upon either party unless in writing and signed by or on behalf of such party. The obligations of the parties hereto are severable and divisible. In the event any provision hereunder is determined to be illegal or unenforceable, the remainder of this Agreement shall continue in full force and effect.

7. Employment At Will; Tax Withholding. This Agreement does not provide a guarantee of employment for any specific duration or a guarantee of any fixed terms or conditions of employment. Your employment with the Company will be "at will", which means that either you or the Company may terminate your employment relationship at any time, with or without cause or notice. Employment with the Company for purposes of this Agreement shall include employment with any subsidiary or affiliate of the Company. The Company reserves the right to withhold or cause to be withheld applicable taxes from any amounts paid pursuant to this Agreement to the extent required by applicable law. You, or your estate, shall be responsible for any and all tax liability imposed on amounts paid hereunder.

8. Successors. The terms of this Agreement are intended to be binding legal obligations of the Company and any successor to the Company by merger, consolidation, business combination, purchase, reorganization or otherwise. In the event of any transaction that results in the transfer of all or substantially all of the assets or business of the Company, the Company will cause the transferee to assume the obligations of the Company under this Agreement.

Sincerely,

By:     /s/ Christine Wolf

    Name: Christine A. Wolf

    Title: EVP, Chief Human Resources Officer

Acknowledged and Agreed:

/s/ Akash Khurana

Akash Khurana

10/21/2020

Exhibit A

Term Sheet

Title:	Executive Vice President, Chief Information & Digital Officer
Principal Work Location:	Pittsburgh, Pennsylvania Relocation package per WESCO policy. Relocation must be completed within one year of employment date.
Annual Base Salary:	$475,000 annual rate to be paid in accordance with the applicable payroll practice in effect from time to time.
Annual Cash Bonus:	Your target annual bonus will be 7 5% of your annual base salary with a payout opportunity of zero to 150% of your annual base salary, based on the achievement of performance objectives as established annually by the Compensation Committee of the Board of Directors of the Company (the "Compensation Committee"). Your bonus for 2020 will be pro-rated based on your hire date. Payment of your earned annual bonus (if any) is subject to your continued employment through the applicable bonus payment date, except as otherwise provided in this Term Sheet or by the terms of the Company's annual bonus program as in effect from time to time.
Annual Equity Awards:	You will be eligible to receive annual equity awards during your employment with the Company. It is expected that your annual equity awards for the Company's fiscal year 2021 will have an aggregate grant date fair value of $875,000, subject to approval by the Compensation Committee. The form, terms and conditions of your annual equity awards will be based on performance and award guidelines established periodically by the Compensation Committee.
Sign On Cash Award:	You will be eligible for a cash award (the "Cash Award") in the aggregate amount of $400,000, payable in two installments of 50% each, subject to your continued employment with the Company through the date that is one month after your first date of employment (for the first installment) and six months after your first date of employment (for the second installment). Each installment will be payable within thirty days after the applicable date. If you terminate your employment with the Company prior to one year after each such payment, you will be required to repay the gross amount of such payment(s) to the Company.

Matching SARs:	You will be eligible to receive stock appreciation rights (SARs) equal to the number of shares that you purchase for long-term investment within the first twelve months of employment, up to the equivalent of one times (lx) your starting annual base salary, to be granted with the approval of the Compensation Committee of the Board of Directors. The exercise price of the SARs will be set at the closing price on the date of purchase on the open market in one or more transactions, not to exceed three trading days. Your purchase of shares must comply with the Company's policy regarding insider trading. These SARs will vest ratably over three years.
Stock Ownership Guidelines:	It is expected that you achieve and maintain an ownership position in Company common stock equal to 2x your annual base salary in accordance with the Stock Ownership Guidelines for WESCO Executives as in effect from time to time.
Health, Welfare, and Other Benefit Programs:	You will be eligible to participate in all corporate benefit programs in accordance with standard policies and procedures in effect from time to time. You will be eligible for 25 Paid Time Off (PTO) days annually, pro-rated for 2020 based on your hire date.

Severance: If your employment is terminated by the Company without Cause, or you resign for Good Reason, then, subject to your execution and delivery of a release of claims in the form provided by the Company (which form shall be substantially consistent with the Company's then-current standard form of release of claims) and such release becoming effective and irrevocable within the time period specified therein, you will be entitled to receive the following severance payments and benefits: (i) cash severance equal to 12 months of your then-current annual base salary, payable in installments over the 12 months following your termination date (provided that any installments that would otherwise have been paid during the period between your termination date and the 60th day following your termination date shall be accumulated and paid on the first regularly scheduled payroll date occurring after the 60th day following your termination date); (ii) a prorated bonus, payable within 60 days following your termination date, equal to the product of your then-current target bonus multiplied by a fraction, the numerator of which is the number of days from January 1 of the fiscal year in which your termination date occurs through the earlier of your termination date and December 31 of such fiscal year and the denominator of which is the total number of days in such fiscal year; (iii) continued participation in the Company medical, dental and vision benefit plans in which you participated immediately prior to your termination of employment for one year following your termination of employment, subject to your continued payment of the applicable premiums at active employee rates (provided that you shall be obligated to refund to the Company any portion of the employer premium subsidy provided during the period between your termination date and the 60th day after your termination date in the event that you do not satisfy the release requirement described above); and (iv) accelerated vesting of the Company stock appreciation rights, if any, granted pursuant to the Matching SARs provision, with any vested stock appreciation rights having the post-termination exercise period specified in the applicable award agreement. Your rate of annual base salary used for purposes of calculating the cash severance and prorated bonus described above will be the rate set forth above in the section of this Term Sheet labelled "Annual Base Salary", as such rate may be increased from time to time, without regard to any salary rate reduction implemented afterward (whether or not such reduction would constitute Good Reason). You will be eligible to participate in the Company's Change in Control Severance Plan in accordance with its terms as in effect from time to time.

Certain Definitions: For purposes of the Agreement, the following capitalized terms shall have the following meanings: "Cause" means: (i) your willful and continued failure to substantially perform your employment duties (other than such failure resulting from physical or mental incapacity), after a written demand for substantial performance is delivered to you that specifically identifies the manner in which the Company believes you have failed to perform your duties, and after you have failed to resume substantial performance of your duties on a continuous basis within thirty (30) calendar days of receiving such demand; (ii) the Company's determination, in good faith, that you have engaged in willful misconduct or gross negligence relating to the business of the Company; (iii) a plea of guilty or nolo contendere by you to, or your conviction of, a felony under federal or state law; or (iv) your material breach of any written policy of the Company, including without limitation the Company's Code of Conduct. "Good Reason" means, without your express written consent, the occurrence of any of the following events: (i) a reduction in your annual base salary, excluding any reduction that occurs in connection with an across-the-board reduction of the salaries of substantially the entire senior management team; (ii) a relocation of your primary place of employment to a location more than 50 miles from Pittsburgh, Pennsylvania; or (iii) any material reduction in your authority, duties or responsibilities; provided, however, that Good Reason shall not exist unless (A) you provide written notice to the Company within 90 days of the initial occurrence of any of the events described in clause (i), (ii) or (iii), or, if later, the date on which you first have knowledge of the circumstances constituting such event; (B) the Company fails to cure the event or circumstances within thirty (30) days after receipt of such notice; and (C) your termination of employment is effective not later than 180 days following the initial existence of the event giving rise to Good Reason. Resignation by you for purposes of accepting employment with another organization or in another location shall not be considered a resignation for Good Reason.

Exhibit B

Restrictive Covenants

(a) Non-Competition. During your employment with the Company and for a period of one year thereafter (the "Restriction Period"), you shall not, to the detriment of any member of the Company Group (as defined below), directly or indirectly, as an owner, partner, employee, agent, consultant, advisor, servant or contractor, engage in or facilitate or support others to engage in the distribution of electrical construction products or electrical and industrial maintenance, repair and operating supplies, or the provision of integrated supply services, or any other business that is in competition with any of the business activities in which the Company Group was engaged prior to the termination of your employment. This provision shall not prevent you from owning less than 1 % of a publicly owned entity or less than 3% of a private equity fund. "Company Group" means, collectively, the Company, Anixter, and their respective subsidiaries and affiliates.

(b) Customer Non-Solicitation. During your employment with the Company and during the Restriction Period, you shall not directly or indirectly call upon, contact or solicit any customer or prospective customer of any member of the Company Group, ( i) with whom you dealt directly or indirectly or for which you had responsibility while employed by the Company, or (ii) about whom you acquired Confidential Information during your employment with the Company, for the purpose of offering, selling or providing products or services that are competitive with those then offered by any member of the Company Group. You shall not solicit or divert, or attempt to solicit or divert, either directly or indirectly, any opportunity or business of any member of the Company Group to any competitor.

(c) Employee Non-Solicitation. During your employment with the Company and during the Restriction Period, you shall not, directly or indirectly, solicit the employment of or hire as an employee or consultant or agent (i) any employee of any member of the Company group or (ii) any former employee of any member of the Company Group whose employment ceased within 180 days prior to the date of such solicitation of hiring.

(d) Reasonableness. You understand that the provisions of clauses (a), (b) and (c) may limit your ability to earn a livelihood in a business similar to the businesses of the Company Group but nevertheless agree and hereby acknowledge that the restrictions and limitations thereof are reasonable in scope, area, and duration, are reasonably necessary to protect the goodwill and business interests of the Company, and that the consideration provided under, or contemplated by, this Agreement is sufficient to justify the restrictions contained in such provisions. Accordingly, in consideration thereof and in light of your education, skills and abilities, you agree that the you shall not assert that, and it should not be considered that, such provisions are either unreasonable in scope, area, or duration, or will prevent you from earning a living, or otherwise are void, voidable, or unenforceable or should be voided or held unenforceable.

(e) Nondisparagement. You shall not disparage, malign, or otherwise say or do anything which is intended to or could reasonably be expected to adversely affect the reputation or standing of the Company.

(f)    Enforcement.

(1)    The parties hereto agree and acknowledge that the covenants and agreements contained herein are reasonable in scope, area, and duration and necessary to protect the reasonable competitive business interests of the Company Group, including, without limitation, the value of the proprietary information and goodwill of the Company Group.

(2)    You agree that the covenants and undertakings contained in this Exhibit B relate to matters which are of a special, unique and extraordinary character and that the Company cannot be reasonably or adequately compensated in damages in an action at law in the event that you breach any of these covenants or undertakings. Therefore, you agree that the Company shall be entitled, as a matter of course, without the need to prove irreparable injury, to an injunction, restraining order or other equitable relief from any court of competent jurisdiction, restraining any violation or threatened violation of any of such terms by you and such other persons as the court shall order. You agree to pay costs and legal fees incurred by the Company in obtaining such injunction and the Company agrees to pay costs and legal fees incurred by you in any unsuccessful effort to obtain such injunction.

(3)    Rights and remedies provided for in this clause (e) are cumulative and shall be in addition to rights and remedies otherwise available to the parties under any other agreement or applicable law.

(4)    In the event that any provision of this Exhibit B shall to any extent be held invalid, unreasonable or unenforceable in any circumstances, the parties hereto agree that the remainder of this Exhibit B and the application of such provision of this Exhibit B to other circumstances shall be valid and enforceable to the fullest extent permitted by law. If any provision of this Exhibit B is held to be unenforceable because of the scope or duration of or the area covered by such provision, the parties hereto agree that the court or arbitrator making such determination shall reduce the scope, duration and/or area of such provision ( and shall substitute appropriate provisions for any such unenforceable provisions to the minimum extent necessary) in order to make such provision enforceable to the fullest extent permitted by law, and/or shall delete specific words and phrases, and such modified provision shall then be enforceable and shall be enforced. The parties hereto recognize that if, in any judicial proceeding, a court shall refuse to enforce any of the separate covenants contained in this Exhibit B, then that unenforceable covenant contained in this Exhibit B shall be deemed eliminated from these provisions to the extent necessary to permit the remaining separate covenants to be enforced. In the event that any court or arbitrator determines that the time period or the area, or both, are unreasonable and that any of the covenants is to that extent unenforceable, the parties hereto agree that such covenants will remain in full force and effect, first, for the greatest time period, and second, in the greatest geographical area that would not render them unenforceable.

(g)    "Confidential Information" means information regarding the business or operations of the Company Group, both oral and written, including, but not limited to, documents and Company Group information contained in such documents; drawings; designs; plans; specifications; instructions; data; manuals; electronic media such as computer disks, computer programs, and data stored electronically; security code numbers; financial, marketing and strategic information; product pricing and customer

information, that any member of the Company Group discloses to you or you otherwise learn or ascertain in any manner as a result of, or in relation to, your employment with the Company Group. Other than as required by applicable law, you agree: (i) to use Confidential Information only for the purposes required or appropriate for your employment with the Company Group; (ii) not to disclose to anyone Confidential Information without the Company's prior written approval; and (iii) not to allow anyone's use or access to Confidential Information, other than as required or appropriate for your employment with the Company Group. The foregoing shall not apply to information that is in the public domain, provided that you were not responsible, directly or indirectly, for such information entering into public domain without the Company's approval. You agree to return to the Company all Confidential Information in your possession upon termination of your employment or at any time requested by the Company.

(h)    The non-competition, non-solicitation, non-disparagement, and confidentiality covenants set forth in this Exhibit B shall be in addition to, and shall not be deemed to supersede, any other similar covenants between you and the Company

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:	May 5, 2023	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:	May 5, 2023	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 March 31, 2023, 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:	May 5, 2023	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 March 31, 2023, 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:	May 5, 2023	By:	/s/ David S. Schulz
			David S. Schulz
			Executive Vice President and Chief Financial Officer

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COVER PAGE - shares	3 Months Ended
	Mar. 31, 2023	May 04, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
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	2023
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Current Reporting Status	Yes
Entity Central Index Key	0000929008
Entity Common Stock, Shares Outstanding		51,272,245
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		51,272,245
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

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	$ 349.1	$ 527.3
Accounts Receivable, after Allowance for Credit Loss, Current	3,807.4	3,662.7
Accounts and Other Receivables, Net, Current	344.3	435.7
Inventories, net	3,729.5	3,498.8
Prepaid expenses and other current assets	217.8	206.0
Assets, Current	8,448.1	8,330.5
Property, buildings and equipment, net of accumulated depreciation of $229,041 and $213,758 in 2014 and 2013, respectively	402.1	402.7
Operating Lease, Right-of-Use Asset	660.1	625.1
Intangible assets, net	1,921.5	1,943.4
Goodwill	3,244.8	3,240.9
Other assets	294.6	269.1
Assets	14,971.2	14,811.7
Accounts payable	2,648.3	2,728.2
Accrued payroll and benefit costs	121.6	269.1
Current portion of long-term debt	7.6	70.5
Other Liabilities, Current	761.4	749.5
Liabilities, Current	3,538.9	3,817.3
Total long-term debt	5,595.1	5,346.0
Operating Lease, Liability, Noncurrent	540.5	510.4
Deferred Income Tax Liabilities, Net	472.1	460.7
Other Liabilities, Noncurrent	234.9	227.7
Liabilities	10,381.5	10,362.1
Commitments and Contingencies
Additional capital	2,003.3	2,005.4
Retained earnings	$ 3,933.0	$ 3,795.0
Treasury Stock, Common, Shares	22,195,470	22,115,653
Treasury stock, at cost; 22,195,470 and 22,115,653 shares in 2023 and 2022, respectively	$ (982.0)	$ (969.1)
Accumulated other comprehensive income	(360.7)	(377.7)
Total WESCO International, Inc. stockholders' equity	4,594.3	4,454.3
Noncontrolling interest	(4.6)	(4.7)
Total stockholders’ equity	4,589.7	4,449.6
Liabilities and Equity	$ 14,971.2	$ 14,811.7
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	$ 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	$ 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)	69,110,060	68,535,704
Common stock, shares outstanding (in shares)	51,254,021	50,759,482
Common stock	$ 0.7	$ 0.7
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	$ 0.0	$ 0.0

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CONSOLIDATED BALANCE SHEETS (parenthetical items) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Accounts Receivable, Allowance for Credit Loss, Current	$ 52.5	$ 46.5
Accumulated depreciation	452.9	425.8
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	$ 54.2	$ 57.9

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CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Gross Profit [Abstract]
Revenues	$ 5,521.9	$ 4,932.2
Cost of goods sold	4,313.4	3,883.1
Operating Expenses [Abstract]
Selling, general and administrative expense	817.7	718.1
Depreciation and amortization	44.4	47.0
Income from operations	346.4	284.0
Interest expense, net	95.0	63.6
Other expense, net	10.1	1.1
Income before income taxes	241.3	219.3
Provision for income taxes	44.1	37.7
Net income	197.2	181.6
Net (loss) income attributable to noncontrolling interest	0.1	0.4
Net income attributable to WESCO International, Inc.	197.1	181.2
Preferred Stock Dividends, Income Statement Impact	14.4	14.4
Net Income (Loss) Available to Common Stockholders, Basic	182.7	166.8
Comprehensive Income:
Foreign currency translation adjustment	17.0	31.6
Comprehensive income attributable to WESCO International, Inc.	$ 199.7	$ 198.4
Basic (in dollars per share)	$ 3.58	$ 3.30
Diluted (in dollars per share)	$ 3.48	$ 3.19

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Operating Activities:
Net income	$ 197.2	$ 181.6
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	44.4	47.0
Stock-based compensation expense	11.7	8.9
Amortization of Debt Issuance Costs and Discounts	3.6	4.6
Deferred income taxes	11.6	(4.5)
Other operating activities, net	0.3	1.5
Changes in assets and liabilities
Increase (Decrease) in Accounts Receivable	133.5	324.6
Increase (Decrease) in Accounts and Other Receivables	91.5	17.8
Inventories, net	(223.8)	(214.2)
Increase (Decrease) in Other Operating Assets	(25.2)	(34.2)
Accounts payable	(86.5)	200.0
Accrued payroll and benefit costs	(149.6)	(135.9)
Other current and noncurrent liabilities	2.9	80.0
Net cash provided by operating activities	(255.4)	(172.0)
Investing Activities:
Capital expenditures	(13.9)	(15.2)
Other investing activities	1.3	0.1
Net cash used in investing activities	(12.6)	(15.1)
Financing Activities:
Proceeds from (Repayments of) Short-term Debt	(4.8)	1.5
Repayments of Senior Debt	58.6	0.0
Proceeds from issuance of long-term debt	968.3	982.3
Repayments of Other Long-term Debt	723.9	792.5
Payments for Repurchase of Common Stock	(51.6)	(16.8)
Payments of Ordinary Dividends, Preferred Stock and Preference Stock	14.4	14.4
Payments of Ordinary Dividends, Common Stock	(19.2)	0.0
Other financing activities, net	(7.2)	7.1
Net cash used in financing activities	88.6	167.2
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Continuing Operations	1.2	8.8
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect, Total	(178.2)	(11.1)
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents	349.1	201.5
Supplemental Cash Flow Information [Abstract]
Interest Paid, Excluding Capitalized Interest, Operating Activities	37.6	8.9
Income Taxes Paid	36.4	27.8
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 59.9	$ 79.1

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY Statement - USD ($) $ in Millions	Total	Common Class B [Member]	Common Stock [Member]	Series A Preferred Stock [Member]	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]	Retained Earnings [Member]	Additional Paid-in Capital [Member]	Treasury Stock, Common [Member]
Common stock		$ 0.0	$ 0.7
Common Stock, Shares, Issued		4,339,431	68,162,297
Additional capital	$ 1,969.3
Retained Earnings (Accumulated Deficit)	3,004.7
Treasury Stock, Value	(956.2)
Stockholders' Equity Attributable to Noncontrolling Interest	(6.3)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (236.0)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0.0
Preferred stock, shares issued (in shares)				21,612
Treasury Stock, Common, Shares	22,026,922
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)			$ 0.0						$ (0.6)
APIC, Share-based Payment Arrangement, Recognition and Exercise	$ 0.0
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	8.9
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ 0.0				$ 8.1	$ 7.8
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	181.2
Dividends, Preferred Stock	(14.4)
Net Income (Loss) Attributable to Noncontrolling Interest	0.4					$ 0.4
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					$ 31.6
Common stock		$ 0.0	$ 0.7
Common Stock, Shares, Issued		4,339,431	68,398,261
Additional capital	1,970.4
Retained Earnings (Accumulated Deficit)	3,163.4
Treasury Stock, Value	(956.8)
Stockholders' Equity Attributable to Noncontrolling Interest	(5.9)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (204.4)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0.0
Preferred stock, shares issued (in shares)				21,612
Treasury Stock, Common, Shares	22,027,780
Common stock		$ 0.0	$ 0.7
Common Stock, Shares, Issued		4,339,431	68,535,704
Additional capital	$ 2,005.4
Retained Earnings (Accumulated Deficit)	3,795.0
Treasury Stock, Value	(969.1)
Stockholders' Equity Attributable to Noncontrolling Interest	(4.7)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (377.7)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0.0
Preferred stock, shares issued (in shares)				21,612
Treasury Stock, Common, Shares	22,115,653
Stock Issued, Value, Stock Options Exercised, Net of Tax Benefit (Expense)			$ 0.0						$ (12.9)
APIC, Share-based Payment Arrangement, Recognition and Exercise	$ 0.3
Shares Granted, Value, Share-based Payment Arrangement, after Forfeiture	11.7
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation			$ 0.0				24.5	14.2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period			811,309						79,817
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation			(236,953)
Net Income (Loss) Attributable to Parent	197.1
Dividends, Preferred Stock	(14.4)
Stockholders' Equity, Other							$ (1.0)	$ 0.1
Net Income (Loss) Attributable to Noncontrolling Interest	0.1					$ 0.1
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax					$ 17.0
Dividends, Common Stock	(19.2)
Common stock		$ 0.0	$ 0.7
Common Stock, Shares, Issued		4,339,431	69,110,060
Additional capital	2,003.3
Retained Earnings (Accumulated Deficit)	3,933.0
Treasury Stock, Value	(982.0)
Stockholders' Equity Attributable to Noncontrolling Interest	(4.6)
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (360.7)
Preferred stock, $.01 par value; 20,000,000 shares authorized, no shares issued or outstanding				$ 0.0
Preferred stock, shares issued (in shares)				21,612
Treasury Stock, Common, Shares	22,195,470

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ORGANIZATION	3 Months Ended
	Mar. 31, 2023
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

3 Months Ended

Mar. 31, 2023

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, 2022, as filed with the SEC on February 21, 2023. The Condensed Consolidated Balance Sheet at December 31, 2022 was derived from the audited Consolidated Financial Statements as of that date, but does not include all the disclosures required by accounting principles generally accepted in the United States of America.

The unaudited Condensed Consolidated Balance Sheet as of March 31, 2023, the unaudited Condensed Consolidated Statements of Income and Comprehensive Income, the unaudited Condensed Consolidated Statements of Stockholders' Equity, and the unaudited Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2023, and 2022, 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 September 2022, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“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. The Company adopted this ASU in the first quarter of 2023, except for the amendment on rollforward information, which the Company will begin disclosing in its Annual Report on Form 10-K for the fiscal year ending December 31, 2023. The adoption of this ASU resulted in additional disclosure of the Company's supplier finance program, as described below.

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

Supplier Finance Program

Supplier Finance Programs

The Company has a supplier finance program that is administered by an intermediary. Under this arrangement, participating suppliers may elect to receive early payment of invoices that have been confirmed by the Company, less an interest deduction, which is paid to the supplier by a third-party finance provider. Wesco agrees to pay the stated amount of confirmed invoices in full on the original due date of the invoices, which is typically within 45 to 90 days of the invoice date, regardless of whether the supplier elects to receive early payment from the third-party finance provider. The Company does not provide assets pledged as security or other forms of guarantees to the finance provider or intermediary under this arrangement. As of March 31, 2023 and December 31, 2022, the amounts due to suppliers that participate in the Company's supplier finance program were approximately $30.0 million and $30.7 million, respectively, which are included in accounts payable in the Condensed Consolidated Balance Sheet.

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REVENUE (Notes)

3 Months Ended

Mar. 31, 2023

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 operate in the United States, Canada and various other countries.

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

	Three Months Ended
	March 31
(In millions)	2023		2022
Electrical & Electronic Solutions	$	2,135.1	$	2,090.0
Communications & Security Solutions	1,732.0		1,434.2
Utility & Broadband Solutions	1,654.8		1,408.0
Total by segment	$	5,521.9	$	4,932.2

	Three Months Ended
	March 31
(In millions)	2023		2022
United States	$	4,090.5	$	3,654.4
Canada	759.4		715.0
Other International(1)	672.0		562.8
Total by geography(2)	$	5,521.9	$	4,932.2

(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 March 31, 2023 and December 31, 2022, $112.2 million and $99.6 million, respectively, of deferred revenue was recorded as a component of other current liabilities in the Condensed Consolidated Balance Sheets. The Company recognized $21.0 million of revenue during the three months ended March 31, 2023 that was included in the deferred revenue balance as of December 31, 2022. The amount of revenue recognized during the three months ended March 31, 2022 that was deferred as of December 31, 2021 was not material.

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 March 31, 2023 and December 31, 2022, the Company had contract assets of $34.8 million and $27.5 million, respectively, resulting from contracts 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 March 31, 2023 and 2022 by approximately $96.5 million and $95.1 million, respectively. The variable consideration for the three months ended March 31, 2022 reflects an adjustment that reduced the previously disclosed amount by $20.1 million. As of March 31, 2023 and December 31, 2022, the Company's estimated product return obligation was $43.9 million and $46.5 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 $76.9 million and $67.6 million for the three months ended March 31, 2023 and 2022, respectively

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GOODWILL (Notes)

3 Months Ended

Mar. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets Disclosure

The following table sets forth the changes in the carrying value of goodwill by reportable segment for the period presented:

	Three Months Ended
	March 31, 2023
	EES		CSS		UBS		Total
	(In millions)
Beginning balance, January 1	$	825.5	$	1,208.9	$	1,206.5	$	3,240.9
Foreign currency exchange rate changes	1.3		(0.7)		0.7		1.3
Adjustments to goodwill for acquisitions(1)	—		2.6		—		2.6
Ending balance, March 31	$	826.8	$	1,210.8	$	1,207.2	$	3,244.8

(1)    Reflects the effect on goodwill of adjustments to the assets acquired and liabilities assumed in the acquisition of Rahi Systems since their initial measurement, which is part of the CSS segment, as described in Note 4, "Acquisitions".

The components of intangible assets are as follows:

		As of
		March 31, 2023						December 31, 2022
	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 millions)
Trademarks	Indefinite	$	792.2	$	—	$	792.2	$	792.1	$	—	$	792.1
Customer relationships	10 - 20	1,516.6		(399.3)		1,117.3		1,516.0		(377.6)		1,138.4
Distribution agreements	15 - 19	29.2		(24.8)		4.4		29.2		(24.4)		4.8
Trademarks	5 and 12	15.5		(7.9)		7.6		15.5		(7.4)		8.1
		$	2,353.5	$	(432.0)	$	1,921.5	$	2,352.8	$	(409.4)	$	1,943.4

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

Amortization expense related to intangible assets totaled $22.0 million and $25.7 million for the three months ended March 31, 2023 and 2022, 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 millions)
2023	$	66.6
2024	86.1
2025	83.0
2026	77.7
2027	74.8
Thereafter	741.1

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STOCK-BASED COMPENSATION (Notes)

3 Months Ended

Mar. 31, 2023

Share-Based Payment Arrangement [Abstract]

STOCK-BASED COMPENSATION

Wesco’s stock-based compensation awards consist 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 at least an annual basis. 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 that were granted under the Company’s 1999 Long-Term Incentive Plan, as amended and restated, vest fully on the third anniversary of the date of grant. The special award described below vests in tranches. Restricted stock units awarded under the WESCO International, Inc. 2021 Omnibus Incentive Plan, which was adopted on May 27, 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 vested in tranches of 30% on each of the first and second anniversaries of the grant date and will vest 40% on the third anniversary of the grant date, subject to continued employment through the applicable anniversary date.

Performance-based awards 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 months ended March 31, 2023 and 2022, Wesco granted the following stock options, restricted stock units, and performance-based awards at the following weighted-average fair values:

	Three Months Ended
	March 31, 2023		March 31, 2022
Stock options granted	75,182		89,550
Weighted-average fair value	$	76.77	$	57.26
Restricted stock units granted	170,569		224,946
Weighted-average fair value	$	171.03	$	122.11
Performance-based awards granted(1)	208,371		83,991
Weighted-average fair value(1)	$	85.94	$	122.09

(1)    As described further below, the three months ended March 31, 2023 includes performance-based awards granted in February 2020 for which actual achievement levels were certified in February 2023.

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

	Three Months Ended
	March 31, 2023		March 31, 2022
Risk free interest rate	4.1	%	1.9	%
Expected life (in years)	5		7
Expected volatility	50	%	43	%
Expected dividend yield	0.88	%	n/a

The risk-free interest rate is based on the U.S. Treasury Daily Yield Curve rate as of the grant date. The expected life is based on historical exercise experience, 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, and the expected dividend yield is based on the calculated yield on the Company's common stock at date of grant using the current fiscal year projected dividend distribution rate. The Company did not pay dividends to holders of its common stock during the three months ended March 31, 2022.

The following table sets forth a summary of stock options and related information for the three months ended March 31, 2023:

	Awards	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value (In millions)
Outstanding at December 31, 2022	87,347	$	121.55
Granted	75,182	170.04
Exercised	(1,279)	122.09
Forfeited	—	—
Outstanding at March 31, 2023	161,250	$	144.15	9.4	$	2.9
Exercisable at March 31, 2023	27,329	$	122.09	8.9	$	0.9

For the three months ended March 31, 2023, the aggregate intrinsic value of stock options exercised during such period was not material.

The following table sets forth a summary of stock-settled stock appreciation rights and related information for the three months ended March 31, 2023:

	Awards	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value (In millions)
Outstanding at December 31, 2022	1,248,115	$	62.02
Granted	—	—
Exercised	(339,649)	68.51
Forfeited	(638)	72.15
Outstanding at March 31, 2023	907,828	$	59.59	5.6	$	86.2
Exercisable at March 31, 2023	865,198	$	58.72	5.5	$	82.9

For the three months ended March 31, 2023, the aggregate intrinsic value of stock-settled stock appreciation rights exercised during such period was $31.6 million.

The following table sets forth a summary of restricted stock units and related information for the three months ended March 31, 2023:

	Awards	Weighted- Average Fair Value
Unvested at December 31, 2022	774,233	$	73.79
Granted	170,569	171.03
Vested	(323,156)	72.05
Forfeited	(184)	102.64
Unvested at March 31, 2023	621,462	$	101.38

The following table sets forth a summary of performance-based awards and related information for the three months ended March 31, 2023:

	Awards	Weighted- Average Fair Value
Unvested at December 31, 2022	335,329	$	75.26
Granted(1)	208,371	85.94
Vested	(289,394)	48.32
Forfeited	—	—
Unvested at March 31, 2023	254,306	$	114.66

(1)    Includes 63,098 performance-based awards granted in February 2023 with a fair value of $171.96 and three-year performance period ending December 31, 2025, and 144,697 performance-based awards granted in February 2020 with a fair value of $48.32 and three-year performance period ended December 31, 2022 for which actual achievement levels were certified in February 2023.

Wesco recognized $11.7 million and $8.9 million of non-cash stock-based compensation expense for the three months ended March 31, 2023 and 2022, respectively, which is included in selling, general and administrative expenses for such periods. As of March 31, 2023, there was $85.2 million of total unrecognized compensation expense related to non-vested stock-based compensation arrangements for all awards previously made of which approximately $35.1 million is expected to be recognized over the remainder of 2023, $31.5 million in 2024, $16.7 million in 2025 and $1.9 million in 2026.

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EARNINGS PER SHARE

3 Months Ended

Mar. 31, 2023

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 computation of basic and diluted earnings per share for the periods presented:

	Three Months Ended
	March 31
(In millions, except per share data)	2023		2022
Net income attributable to WESCO International, Inc.	$	197.1	$	181.2
Less: Preferred stock dividends	14.4		14.4
Net income attributable to common stockholders	$	182.7	$	166.8
Weighted-average common shares outstanding used in computing basic earnings per share	51.0		50.6
Common shares issuable upon exercise of dilutive equity awards	1.5		1.6
Weighted-average common shares outstanding and common share equivalents used in computing diluted earnings per share	52.5		52.2
Earnings per share attributable to common stockholders
Basic	$	3.58	$	3.30
Diluted	$	3.48	$	3.19

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 months ended March 31, 2023 and 2022, there were approximately 0.4 million and 0.1 million antidilutive shares, respectively

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DEBT (Notes)

3 Months Ended

Mar. 31, 2023

Debt Instrument [Line Items]

Debt Disclosure [Text Block]

8. DEBT

The following table sets forth Wesco's outstanding indebtedness:

	As of
	March 31, 2023		December 31, 2022
	(In millions)
International lines of credit	$	2.2	$	7.1
Accounts Receivable Securitization Facility	1,613.0		1,535.0
Revolving Credit Facility	1,189.8		1,023.6
5.50% Anixter Senior Notes due 2023	—		58.6
6.00% Anixter Senior Notes due 2025	4.2		4.2
7.125% Senior Notes due 2025	1,500.0		1,500.0
7.250% Senior Notes due 2028, less debt discount of $6.5 and $6.8 in 2023 and 2022, respectively	1,318.5		1,318.2
Finance lease obligations	22.6		20.6
Total debt	5,650.3		5,467.3
Plus: Fair value adjustments to the Anixter Senior Notes	0.1		0.3
Less: Unamortized debt issuance costs	(47.7)		(51.1)
Less: Short-term debt and current portion of long-term debt(1)	(7.6)		(70.5)
Total long-term debt	$	5,595.1	$	5,346.0

(1)    As of December 31, 2022, short-term debt and current portion of long-term debt included the $58.6 million aggregate principal amount of the Company's 5.50% Anixter Senior Notes due 2023, which matured on March 1, 2023.

5.50% Anixter Senior Notes due 2023

On March 1, 2023, Wesco Distribution repaid the $58.6 million aggregate principal amount of its 5.50% Anixter Senior Notes due 2023 plus accrued interest up to, but not including, the maturity date. The repayment was funded with borrowings under the Company's Revolving Credit Facility and had no impact on the Company's results of operations.

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EMPLOYEE BENEFIT PLANS (Notes)

3 Months Ended

Mar. 31, 2023

Retirement Benefits [Abstract]

EMPLOYEE BENEFIT PLANS

9. EMPLOYEE BENEFIT PLANS

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

	Three Months Ended
(In millions)	March 31, 2023		March 31, 2022		March 31, 2023		March 31, 2022		March 31, 2023		March 31, 2022
	Domestic Plans(1)				Foreign Plans(2)				Total
Service cost	$	—	$	—	$	1.2	$	2.2	$	1.2	$	2.2
Interest cost	2.6		2.1		2.8		2.3		5.4		4.4
Expected return on plan assets	(2.4)		(3.5)		(3.0)		(4.3)		(5.4)		(7.8)
Recognized actuarial gain(3)	—		—		(0.3)		(0.2)		(0.3)		(0.2)
Net periodic pension (benefit) cost	$	0.2	$	(1.4)	$	0.7	$	—	$	0.9	$	(1.4)

(1)    Defined as the Anixter Inc. Pension Plan, Anixter Inc. Executive Benefit Plan, and the Anixter Inc. Supplemental Executive Retirement Plan.

(2)    Defined as the EECOL Electric ULC Retirement Plan, the EECOL Electric ULC Supplemental Executive Retirement Plan, the Pension Plan for Employees of Anixter Canada Inc., and various defined benefit pension plans covering employees of foreign subsidiaries in Europe.

(3)    For the three months ended March 31, 2023 and 2022, no material amounts were reclassified from accumulated other comprehensive income into net income.

Service cost is reported as a component of selling, general and administrative expenses. The other components of net periodic pension (benefit) cost totaling net benefits of $0.3 million and $3.6 million for the three months ended March 31, 2023 and 2022, respectively, are presented as components of other expense (income), net.

The Company expects to contribute approximately $7.0 million to its Foreign Plans in 2023, of which approximately $2.4 million was contributed during the three months ended March 31, 2023. The Company does not expect to make a contribution to its domestic qualified pension plan in 2023 due to its overfunded status.

Other Employee Benefit Plans

Wesco sponsors defined contribution retirement savings plans for the majority of its employees in the U.S. and certain employees in Canada, which provide employer contributions.

Wesco incurred charges of $21.4 million and $18.1 million for the three months ended March 31, 2023 and 2022, respectively, for its defined contribution 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 March 31, 2023 and December 31, 2022, the Company's obligation under the Wesco Deferred Compensation Plan was $24.7 million and $20.3 million, respectively, which is included in other noncurrent liabilities in the Condensed Consolidated Balance Sheets.

Compensation Related Costs, General

Other Employee Benefit Plans

Wesco sponsors defined contribution retirement savings plans for the majority of its employees in the U.S. and certain employees in Canada, which provide employer contributions.

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FAIR VALUE (Notes)

3 Months Ended

Mar. 31, 2023

Fair Value Disclosures [Abstract]

Fair Value of Financial Instruments

10. 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 other 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 $2,822.8 million and $2,881.2 million as of March 31, 2023 and December 31, 2022, respectively. The estimated fair value of this debt was $2,896.8 million and $2,929.5 million as of March 31, 2023 and December 31, 2022, respectively. The reported carrying values of Wesco's other debt instruments, including those with variable interest rates, approximated their fair values as of March 31, 2023 and December 31, 2022.

The Company purchases foreign currency forward contracts to reduce 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 March 31, 2023 and December 31, 2022, foreign currency forward contracts were revalued at then-current foreign exchange rates with the changes in valuation reflected directly in other non-operating expense (income) in the Condensed Consolidated Statements of Income and Comprehensive Income offsetting the transaction gain (loss) recorded on foreign currency-denominated accounts. At March 31, 2023 and December 31, 2022, the gross and net notional amounts of foreign currency forward contracts outstanding were approximately $162.4 million and $172.8 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 reduce 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 March 31, 2023 and December 31, 2022, foreign currency forward contracts were revalued at then-current foreign exchange rates with the changes in valuation reflected directly in other non-operating expense (income) in the Condensed Consolidated Statements of Income and Comprehensive Income offsetting the transaction gain (loss) recorded on foreign currency-denominated accounts. At March 31, 2023 and December 31, 2022, the gross and net notional amounts of foreign currency forward contracts outstanding were approximately $162.4 million and $172.8 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	3 Months Ended
	Mar. 31, 2023
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

3 Months Ended

Mar. 31, 2022

Income Tax Disclosure [Abstract]

INCOME TAXES

The effective tax rate for the three months ended March 31, 2023 and 2022 was 18.3% and 17.2%, respectively. For the three months ended March 31, 2023 and 2022, the effective tax rate reflects discrete income tax benefits of $21.2 million and $5.8 million, respectively, resulting from the exercise and vesting of stock-based awards. For the three months ended March 31, 2022, the effective tax rate also reflects a discrete income tax benefit of $13.4 million resulting from a reduction to the valuation allowance recorded against foreign tax credit carryforwards. These discrete income tax benefits reduced the estimated annual effective tax rate in such periods by approximately 8.8 and 8.7 percentage points, respectively. The estimated annual effective tax rate differs from the federal statutory income tax rate due primarily to state income taxes and nondeductible expenses.

There have been no material adjustments to liabilities for uncertain tax positions since December 31, 2022.

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Segment Reporting

3 Months Ended

Mar. 31, 2023

Segment Reporting [Abstract]

Segment Reporting Disclosure

13. 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 millions)	Three Months Ended March 31, 2023
	EES		CSS		UBS		Total
Net sales	$	2,135.1	$	1,732.0	$	1,654.8	$	5,521.9
	Three Months Ended March 31, 2022
(In millions)	EES		CSS		UBS		Total
Net sales	$	2,090.0	$	1,434.2	$	1,408.0	$	4,932.2

(In millions)	Three Months Ended March 31, 2023
	EES			CSS			UBS
Adjusted EBITDA	$	183.0		$	155.5		$	187.7
Adjusted EBITDA Margin %	8.6		%	9.0		%	11.3		%
	Three Months Ended March 31, 2022
(In millions)	EES			CSS			UBS
Adjusted EBITDA	$	192.4		$	123.0		$	136.3
Adjusted EBITDA Margin %	9.2		%	8.6		%	9.7		%

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

	As of
	March 31, 2023
(In millions)	EES		CSS		UBS		Corporate(1)		Total
Total assets	$	4,490.9	$	5,586.0	$	4,038.1	$	856.2	$	14,971.2
	As of
	December 31, 2022
(In millions)	EES		CSS		UBS		Corporate(1)		Total
Total assets	$	4,480.4	$	5,504.0	$	3,827.4	$	999.9	$	14,811.7

(1)    Total assets for Corporate primarily consist of cash and cash equivalents, deferred income taxes, property, buildings and equipment, capitalized cloud computing arrangement costs, operating lease assets, and pension assets.

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 March 31, 2023
(In millions)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	171.3		$	135.4		$	180.3		$	(304.3)	$	182.7
Net (loss) income attributable to noncontrolling interests	(0.1)			0.2			—			—		0.1
Preferred stock dividends	—			—			—			14.4		14.4
Provision for income taxes	—			—			—			44.1		44.1
Interest expense, net	—			—			—			95.0		95.0
Depreciation and amortization	9.9			18.0			6.0			10.5		44.4
Other expense, net	0.5			0.8			0.6			8.2		10.1
Stock-based compensation expense(1)	1.4			1.1			0.8			7.1		10.4
Merger-related and integration costs	—			—			—			19.5		19.5
Adjusted EBITDA	$	183.0		$	155.5		$	187.7		$	(105.5)	$	420.7
Adjusted EBITDA margin %	8.6		%	9.0		%	11.3		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the three months ended March 31, 2023 excludes $1.3 million that is included in merger-related and integration costs.

	Three Months Ended March 31, 2022
(In millions)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	178.7		$	103.7		$	129.9		$	(245.5)	$	166.8
Net income attributable to noncontrolling interests	0.2			—			—			0.2		0.4
Preferred stock dividends	—			—			—			14.4		14.4
Provision for income taxes	—			—			—			37.7		37.7
Interest expense, net	—			—			—			63.6		63.6
Depreciation and amortization	12.0			18.1			5.8			11.1		47.0
Other (income) expense, net	(0.1)			0.3			—			0.9		1.1
Stock-based compensation expense(1)	1.6			0.9			0.6			4.4		7.5
Merger-related and integration costs	—			—			—			25.6		25.6
Adjusted EBITDA	$	192.4		$	123.0		$	136.3		$	(87.6)	$	364.1
Adjusted EBITDA margin %	9.2		%	8.6		%	9.7		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the three months ended March 31, 2022 excludes $1.4 million that 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 earnings before interest, taxes, depreciation and amortization 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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Subsequent Events	3 Months Ended
	Mar. 31, 2023
Subsequent Events [Abstract]
Subsequent Events [Text Block]	14. SUBSEQUENT EVENTS

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Business Combinations and Asset Acquisitions

3 Months Ended

Mar. 31, 2023

Business Combination and Asset Acquisition [Abstract]

Business Combination Disclosure

Rahi Systems Holdings, Inc.

On November 1, 2022, through its wholly-owned subsidiary WESCO Distribution, Inc. (“Wesco Distribution”), the Company acquired 100% of the equity securities of Rahi Systems Holdings, Inc. (“Rahi Systems” or “Rahi”). Headquartered in Fremont, California, Rahi Systems is a leading provider of global hyperscale data center solutions with over 900 employees in 25 countries. Rahi's expertise with complex information technology projects and global presence strengthen Wesco's data center solution offerings. Wesco Distribution funded the purchase price paid at closing with cash on hand as well as borrowings under its accounts receivable securitization and revolving credit facilities.

Since the initial measurement of the identified assets acquired and liabilities assumed, the Company has recorded adjustments to inventories of $25.4 million and accounts payable of $28.0 million. The net impact of these adjustments was an increase to goodwill of $2.6 million.

The estimated fair values of assets acquired and liabilities assumed are based on preliminary calculations and valuations using estimates and assumptions at the time of acquisition. As the Company obtains additional information during the measurement period (not to exceed one year from the acquisition date), estimates and assumptions for the preliminary purchase consideration allocations may change materially.

The results of operations of Rahi Systems are included in Wesco's unaudited condensed consolidated financial statements beginning on November 1, 2022, the acquisition date. For the three months ended March 31, 2023, the condensed consolidated statement of income includes $136.3 million of net sales and an immaterial amount of income from operations for Rahi Systems. The Company has not presented supplemental pro forma revenue and earnings of the combined business as the acquisition of Rahi Systems is not material to Wesco's unaudited condensed consolidated financial statements.

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ACCOUNTING POLICIES (Policies)

3 Months Ended

Mar. 31, 2023

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, 2022, as filed with the SEC on February 21, 2023. The Condensed Consolidated Balance Sheet at December 31, 2022 was derived from the audited Consolidated Financial Statements as of that date, but does not include all the disclosures required by accounting principles generally accepted in the United States of America.

The unaudited Condensed Consolidated Balance Sheet as of March 31, 2023, the unaudited Condensed Consolidated Statements of Income and Comprehensive Income, the unaudited Condensed Consolidated Statements of Stockholders' Equity, and the unaudited Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2023, and 2022, 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

New Accounting Pronouncements, Policy

Recently Adopted and Recently Issued Accounting Standards

In September 2022, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“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. The Company adopted this ASU in the first quarter of 2023, except for the amendment on rollforward information, which the Company will begin disclosing in its Annual Report on Form 10-K for the fiscal year ending December 31, 2023. The adoption of this ASU resulted in additional disclosure of the Company's supplier finance program, as described below.

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)

3 Months Ended

Mar. 31, 2023

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
	March 31
(In millions)	2023		2022
Electrical & Electronic Solutions	$	2,135.1	$	2,090.0
Communications & Security Solutions	1,732.0		1,434.2
Utility & Broadband Solutions	1,654.8		1,408.0
Total by segment	$	5,521.9	$	4,932.2

	Three Months Ended
	March 31
(In millions)	2023		2022
United States	$	4,090.5	$	3,654.4
Canada	759.4		715.0
Other International(1)	672.0		562.8
Total by geography(2)	$	5,521.9	$	4,932.2

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GOODWILL (Tables)

3 Months Ended

Mar. 31, 2023

Goodwill [Line Items]

Schedule of Goodwill [Table Text Block]

	Three Months Ended
	March 31, 2023
	EES		CSS		UBS		Total
	(In millions)
Beginning balance, January 1	$	825.5	$	1,208.9	$	1,206.5	$	3,240.9
Foreign currency exchange rate changes	1.3		(0.7)		0.7		1.3
Adjustments to goodwill for acquisitions(1)	—		2.6		—		2.6
Ending balance, March 31	$	826.8	$	1,210.8	$	1,207.2	$	3,244.8

(1)    Reflects the effect on goodwill of adjustments to the assets acquired and liabilities assumed in the acquisition of Rahi Systems since their initial measurement, which is part of the CSS segment, as described in Note 4, "Acquisitions".

Schedule of Finite-Lived Intangible Assets

The components of intangible assets are as follows:

		As of
		March 31, 2023						December 31, 2022
	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 millions)
Trademarks	Indefinite	$	792.2	$	—	$	792.2	$	792.1	$	—	$	792.1
Customer relationships	10 - 20	1,516.6		(399.3)		1,117.3		1,516.0		(377.6)		1,138.4
Distribution agreements	15 - 19	29.2		(24.8)		4.4		29.2		(24.4)		4.8
Trademarks	5 and 12	15.5		(7.9)		7.6		15.5		(7.4)		8.1
		$	2,353.5	$	(432.0)	$	1,921.5	$	2,352.8	$	(409.4)	$	1,943.4

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 millions)
2023	$	66.6
2024	86.1
2025	83.0
2026	77.7
2027	74.8
Thereafter	741.1

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STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2023

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 months ended March 31, 2023 and 2022, Wesco granted the following stock options, restricted stock units, and performance-based awards at the following weighted-average fair values:

	Three Months Ended
	March 31, 2023		March 31, 2022
Stock options granted	75,182		89,550
Weighted-average fair value	$	76.77	$	57.26
Restricted stock units granted	170,569		224,946
Weighted-average fair value	$	171.03	$	122.11
Performance-based awards granted(1)	208,371		83,991
Weighted-average fair value(1)	$	85.94	$	122.09

(1)    As described further below, the three months ended March 31, 2023 includes performance-based awards granted in February 2020 for which actual achievement levels were certified in February 2023.

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 and related information for the three months ended March 31, 2023:

	Awards	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value (In millions)
Outstanding at December 31, 2022	1,248,115	$	62.02
Granted	—	—
Exercised	(339,649)	68.51
Forfeited	(638)	72.15
Outstanding at March 31, 2023	907,828	$	59.59	5.6	$	86.2
Exercisable at March 31, 2023	865,198	$	58.72	5.5	$	82.9

For the three months ended March 31, 2023, the aggregate intrinsic value of stock-settled stock appreciation rights exercised during such period was $31.6 million.

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

The following table sets forth a summary of restricted stock units and related information for the three months ended March 31, 2023:

	Awards	Weighted- Average Fair Value
Unvested at December 31, 2022	774,233	$	73.79
Granted	170,569	171.03
Vested	(323,156)	72.05
Forfeited	(184)	102.64
Unvested at March 31, 2023	621,462	$	101.38

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

The following table sets forth a summary of performance-based awards and related information for the three months ended March 31, 2023:

	Awards	Weighted- Average Fair Value
Unvested at December 31, 2022	335,329	$	75.26
Granted(1)	208,371	85.94
Vested	(289,394)	48.32
Forfeited	—	—
Unvested at March 31, 2023	254,306	$	114.66

(1)    Includes 63,098 performance-based awards granted in February 2023 with a fair value of $171.96 and three-year performance period ending December 31, 2025, and 144,697 performance-based awards granted in February 2020 with a fair value of $48.32 and three-year performance period ended December 31, 2022 for which actual achievement levels were certified in February 2023.

Share-Based Payment Arrangement, Option, Activity

The following table sets forth a summary of stock options and related information for the three months ended March 31, 2023:

	Awards	Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (In years)	Aggregate Intrinsic Value (In millions)
Outstanding at December 31, 2022	87,347	$	121.55
Granted	75,182	170.04
Exercised	(1,279)	122.09
Forfeited	—	—
Outstanding at March 31, 2023	161,250	$	144.15	9.4	$	2.9
Exercisable at March 31, 2023	27,329	$	122.09	8.9	$	0.9

For the three months ended March 31, 2023, the aggregate intrinsic value of stock options exercised during such period was not material.

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, as disclosed in the table above, were estimated using the following weighted-average assumptions in the respective periods:

	Three Months Ended
	March 31, 2023		March 31, 2022
Risk free interest rate	4.1	%	1.9	%
Expected life (in years)	5		7
Expected volatility	50	%	43	%
Expected dividend yield	0.88	%	n/a

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EARNINGS PER SHARE (Tables)

3 Months Ended

Mar. 31, 2023

Earnings Per Share [Abstract]

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

The following table sets forth the computation of basic and diluted earnings per share for the periods presented:

	Three Months Ended
	March 31
(In millions, except per share data)	2023		2022
Net income attributable to WESCO International, Inc.	$	197.1	$	181.2
Less: Preferred stock dividends	14.4		14.4
Net income attributable to common stockholders	$	182.7	$	166.8
Weighted-average common shares outstanding used in computing basic earnings per share	51.0		50.6
Common shares issuable upon exercise of dilutive equity awards	1.5		1.6
Weighted-average common shares outstanding and common share equivalents used in computing diluted earnings per share	52.5		52.2
Earnings per share attributable to common stockholders
Basic	$	3.58	$	3.30
Diluted	$	3.48	$	3.19

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DEBT (Tables)

3 Months Ended

Mar. 31, 2023

Debt Disclosure [Abstract]

Schedule of Debt

The following table sets forth Wesco's outstanding indebtedness:

	As of
	March 31, 2023		December 31, 2022
	(In millions)
International lines of credit	$	2.2	$	7.1
Accounts Receivable Securitization Facility	1,613.0		1,535.0
Revolving Credit Facility	1,189.8		1,023.6
5.50% Anixter Senior Notes due 2023	—		58.6
6.00% Anixter Senior Notes due 2025	4.2		4.2
7.125% Senior Notes due 2025	1,500.0		1,500.0
7.250% Senior Notes due 2028, less debt discount of $6.5 and $6.8 in 2023 and 2022, respectively	1,318.5		1,318.2
Finance lease obligations	22.6		20.6
Total debt	5,650.3		5,467.3
Plus: Fair value adjustments to the Anixter Senior Notes	0.1		0.3
Less: Unamortized debt issuance costs	(47.7)		(51.1)
Less: Short-term debt and current portion of long-term debt(1)	(7.6)		(70.5)
Total long-term debt	$	5,595.1	$	5,346.0

(1)    As of December 31, 2022, short-term debt and current portion of long-term debt included the $58.6 million aggregate principal amount of the Company's 5.50% Anixter Senior Notes due 2023, which matured on March 1, 2023.

5.50% Anixter Senior Notes due 2023

On March 1, 2023, Wesco Distribution repaid the $58.6 million aggregate principal amount of its 5.50% Anixter Senior Notes due 2023 plus accrued interest up to, but not including, the maturity date. The repayment was funded with borrowings under the Company's Revolving Credit Facility and had no impact on the Company's results of operations.

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EMPLOYEE BENEFIT PLANS Schedule of Net Benefit Costs (Tables)

3 Months Ended

Mar. 31, 2023

Postemployment Benefits [Abstract]

Schedule of Net Benefit Costs [Table Text Block]

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

	Three Months Ended
(In millions)	March 31, 2023		March 31, 2022		March 31, 2023		March 31, 2022		March 31, 2023		March 31, 2022
	Domestic Plans(1)				Foreign Plans(2)				Total
Service cost	$	—	$	—	$	1.2	$	2.2	$	1.2	$	2.2
Interest cost	2.6		2.1		2.8		2.3		5.4		4.4
Expected return on plan assets	(2.4)		(3.5)		(3.0)		(4.3)		(5.4)		(7.8)
Recognized actuarial gain(3)	—		—		(0.3)		(0.2)		(0.3)		(0.2)
Net periodic pension (benefit) cost	$	0.2	$	(1.4)	$	0.7	$	—	$	0.9	$	(1.4)

(1)    Defined as the Anixter Inc. Pension Plan, Anixter Inc. Executive Benefit Plan, and the Anixter Inc. Supplemental Executive Retirement Plan.

(2)    Defined as the EECOL Electric ULC Retirement Plan, the EECOL Electric ULC Supplemental Executive Retirement Plan, the Pension Plan for Employees of Anixter Canada Inc., and various defined benefit pension plans covering employees of foreign subsidiaries in Europe.

(3)    For the three months ended March 31, 2023 and 2022, no material amounts were reclassified from accumulated other comprehensive income into net income.

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Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2023

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

(In millions)	Three Months Ended March 31, 2023
	EES		CSS		UBS		Total
Net sales	$	2,135.1	$	1,732.0	$	1,654.8	$	5,521.9
	Three Months Ended March 31, 2022
(In millions)	EES		CSS		UBS		Total
Net sales	$	2,090.0	$	1,434.2	$	1,408.0	$	4,932.2

(In millions)	Three Months Ended March 31, 2023
	EES			CSS			UBS
Adjusted EBITDA	$	183.0		$	155.5		$	187.7
Adjusted EBITDA Margin %	8.6		%	9.0		%	11.3		%
	Three Months Ended March 31, 2022
(In millions)	EES			CSS			UBS
Adjusted EBITDA	$	192.4		$	123.0		$	136.3
Adjusted EBITDA Margin %	9.2		%	8.6		%	9.7		%

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 March 31, 2023
(In millions)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	171.3		$	135.4		$	180.3		$	(304.3)	$	182.7
Net (loss) income attributable to noncontrolling interests	(0.1)			0.2			—			—		0.1
Preferred stock dividends	—			—			—			14.4		14.4
Provision for income taxes	—			—			—			44.1		44.1
Interest expense, net	—			—			—			95.0		95.0
Depreciation and amortization	9.9			18.0			6.0			10.5		44.4
Other expense, net	0.5			0.8			0.6			8.2		10.1
Stock-based compensation expense(1)	1.4			1.1			0.8			7.1		10.4
Merger-related and integration costs	—			—			—			19.5		19.5
Adjusted EBITDA	$	183.0		$	155.5		$	187.7		$	(105.5)	$	420.7
Adjusted EBITDA margin %	8.6		%	9.0		%	11.3		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the three months ended March 31, 2023 excludes $1.3 million that is included in merger-related and integration costs.

	Three Months Ended March 31, 2022
(In millions)	EES			CSS			UBS			Corporate		Total
Net income attributable to common stockholders	$	178.7		$	103.7		$	129.9		$	(245.5)	$	166.8
Net income attributable to noncontrolling interests	0.2			—			—			0.2		0.4
Preferred stock dividends	—			—			—			14.4		14.4
Provision for income taxes	—			—			—			37.7		37.7
Interest expense, net	—			—			—			63.6		63.6
Depreciation and amortization	12.0			18.1			5.8			11.1		47.0
Other (income) expense, net	(0.1)			0.3			—			0.9		1.1
Stock-based compensation expense(1)	1.6			0.9			0.6			4.4		7.5
Merger-related and integration costs	—			—			—			25.6		25.6
Adjusted EBITDA	$	192.4		$	123.0		$	136.3		$	(87.6)	$	364.1
Adjusted EBITDA margin %	9.2		%	8.6		%	9.7		%
(1) Stock-based compensation expense in the calculation of adjusted EBITDA for the three months ended March 31, 2022 excludes $1.4 million that 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
	March 31, 2023
(In millions)	EES		CSS		UBS		Corporate(1)		Total
Total assets	$	4,490.9	$	5,586.0	$	4,038.1	$	856.2	$	14,971.2
	As of
	December 31, 2022
(In millions)	EES		CSS		UBS		Corporate(1)		Total
Total assets	$	4,480.4	$	5,504.0	$	3,827.4	$	999.9	$	14,811.7

(1)    Total assets for Corporate primarily consist of cash and cash equivalents, deferred income taxes, property, buildings and equipment, capitalized cloud computing arrangement costs, operating lease assets, and pension assets.

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ACCOUNTING POLICIES (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Supplier Finance Program, Obligation	$ 30.0	$ 30.7

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REVENUE (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Deferred Revenue	$ 112.2		$ 99.6
Revenue from Contract with Customer, Excluding Assessed Tax	5,521.9	$ 4,932.2
Cost of goods sold	4,313.4	3,883.1
Contract with Customer, Refund Liability	43.9		$ 46.5
EES
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,135.1	2,090.0
CSS
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,732.0	1,434.2
UBS
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,654.8	1,408.0
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,090.5	3,654.4
CANADA
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	759.4	715.0
Non-US [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	672.0	562.8
Shipping and Handling [Member]
Disaggregation of Revenue [Line Items]
Cost of goods sold	$ 76.9	$ 67.6

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REVENUE Deferred Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Deferred Revenue	$ 112.2	$ 99.6
Contract with Customer, Asset, before Allowance for Credit Loss	34.8	$ 27.5
Deferred Revenue, Revenue Recognized	$ 21.0

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REVENUE Shipping and Handling Costs (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cost of goods sold	$ 4,313.4	$ 3,883.1
Shipping and Handling [Member]
Cost of goods sold	$ 76.9	$ 67.6

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REVENUE Variable Consideration (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue, Methods, Inputs, and Assumptions Used [Abstract]
Revenue, Variable Consideration Constraint Increase (Decrease)	$ 96.5	$ 95.1
Prior Period Adjustment [Abstract]
Prior Period Reclassification Adjustment		$ (20.1)

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REVENUE Revenue, Performance Obligation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Revenue from Contract with Customer [Abstract]
Cost of goods sold	$ 4,313.4	$ 3,883.1

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GOODWILL (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Goodwill [Line Items]
Goodwill	$ 3,244.8		$ 3,240.9
Goodwill, Foreign Currency Translation Gain (Loss)	1.3
Goodwill, Purchase Accounting Adjustments	2.6
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	2,353.5		2,352.8
Finite-Lived Intangible Assets, Accumulated Amortization	(432.0)		(409.4)
Finite-Lived Intangible Assets, Net	1,921.5		1,943.4
Finite-Lived Intangible Asset, Expected Amortization, Year One	66.6
Finite-Lived Intangible Asset, Expected Amortization, Year Two	86.1
Finite-Lived Intangible Asset, Expected Amortization, Year Three	83.0
Finite-Lived Intangible Asset, Expected Amortization, Year Four	77.7
Finite-Lived Intangible Asset, Expected Amortization, Year Five	74.8
Finite-Lived Intangible Asset, Expected Amortization, after Year Five	741.1
Amortization of Intangible Assets	22.0	$ 25.7
Amortization of Intangible Assets	22.0	$ 25.7
Finite-Lived Intangible Asset, Expected Amortization, Year Three	83.0
Finite-Lived Intangible Asset, Expected Amortization, Year Four	77.7
Finite-Lived Intangible Asset, Expected Amortization, Year Five	74.8
Finite-Lived Intangible Asset, Expected Amortization, after Year Five	741.1
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	15.5		15.5
Finite-Lived Intangible Assets, Accumulated Amortization	(7.9)		(7.4)
Finite-Lived Intangible Assets, Net	$ 7.6		8.1
Trademarks [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	12 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets, Gross	$ 1,516.6		1,516.0
Finite-Lived Intangible Assets, Accumulated Amortization	(399.3)		(377.6)
Finite-Lived Intangible Assets, Net	$ 1,117.3		1,138.4
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	$ 29.2		29.2
Finite-Lived Intangible Assets, Accumulated Amortization	(24.8)		(24.4)
Finite-Lived Intangible Assets, Net	$ 4.4		4.8
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	$ 826.8		825.5
Goodwill, Foreign Currency Translation Gain (Loss)	1.3
Goodwill, Purchase Accounting Adjustments	0.0
CSS
Goodwill [Line Items]
Goodwill	1,210.8		1,208.9
Goodwill, Acquired During Period	(0.7)
Goodwill, Purchase Accounting Adjustments	2.6
UBS
Goodwill [Line Items]
Goodwill	1,207.2		1,206.5
Goodwill, Acquired During Period	0.7
Goodwill, Purchase Accounting Adjustments	0.0
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets (Excluding Goodwill)	$ 792.2		$ 792.1

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STOCK-BASED COMPENSATION AWARDS (Details) - $ / shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	0
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	170,569	224,946
Granted, Weighted Average Fair Value (in dollars per share)	$ 171.03	$ 122.11
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	208,371	83,991
Granted, Weighted Average Fair Value (in dollars per share)	$ 85.94	$ 122.09
Performance Shares [Member] | 2020 Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	144,697
Granted, Weighted Average Fair Value (in dollars per share)	$ 48.32
Performance Shares [Member] | 2023 Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	63,098
Granted, Weighted Average Fair Value (in dollars per share)	$ 171.96
Share-based Payment Arrangement, Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	75,182	89,550
Granted, Weighted Average Fair Value (in dollars per share)	$ 76.77	$ 57.26

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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 Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
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	907,828	1,248,115
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 59.59	$ 62.02
Granted (in shares)	0
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	(339,649)
Weighted Average Exercise Price, Exercises in Period (in dollars per share)	$ 68.51
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures	(638)
Weighted Average Exercise Price, Forfeitures in Period (in dollars per share)	$ 72.15
Weighted Average Remaining Contractual Term, Outstanding (in years)	5 years 7 months 6 days
Aggregate Intrinsic Value, Outstanding	$ 86.2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	865,198
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 58.72
Weighted Average Remaining Contractual Term, Exercisable (in years)	5 years 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 82.9
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 31.6

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SCHEDULE OF SHARE-BASED PAYMENT AWARD, VALUATION ASSUMPTIONS (Details)	3 Months Ended
	Mar. 31, 2023 Rate	Mar. 31, 2022 Rate
Share-Based Payment Arrangement [Abstract]
WESCO expected volatility	50.00%	43.00%
Risk free interest rate	4.10%	1.90%
Expected life (in years)	5 years	7 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.88%

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SUMMARY OF RESTRICTED STOCK UNITS (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance-based awards outstanding (in shares)	621,462		774,233
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 101.38		$ 73.79
Granted (in shares)	170,569	224,946
Granted, Weighted Average Fair Value (in dollars per share)	$ 171.03	$ 122.11
Vested (in shares)	(323,156)
Vested in Period, Weighted Average Fair Value (in dollars per share)	$ 72.05
Forfeited (in shares)	(184)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 102.64

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SUMMARY OF PERFORMANCE-BASED AWARDS (Details) - Performance Shares [Member] - $ / shares	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Unvested (in shares)	254,306		335,329
Granted (in shares)	208,371	83,991
Vested (in shares)	(289,394)
Forfeited (in shares)	0
Unvested, Weighted Average Fair Value (in dollars per share)	$ 114.66		$ 75.26
Granted, Weighted Average Fair Value (in dollars per share)	85.94	$ 122.09
Forfeited in Period, Weighted Average Fair Value (in dollars per share)	$ 0

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STOCK-BASED COMPENSATION (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 11.7	$ 8.9
Total unrecognized compensation cost	$ 85.2
Forecast [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense			$ 1.9	$ 16.7	$ 31.5	$ 35.1

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Summary of Non-Qualified Stock Options (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
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	907,828		1,248,115
Granted (in shares)	0
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised	(339,649)
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures	(638)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	865,198
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 59.59		$ 62.02
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)	68.51
Weighted Average Exercise Price, Forfeitures in Period (in dollars per share)	72.15
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 58.72
Weighted Average Remaining Contractual Term, Outstanding (in years)	5 years 7 months 6 days
Aggregate Intrinsic Value, Outstanding	$ 86.2
Weighted Average Remaining Contractual Term, Exercisable (in years)	5 years 6 months
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 82.9
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 31.6
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	161,250		87,347
Granted (in shares)	75,182	89,550
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised	(1,279)
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Forfeitures	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number	27,329
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price	$ 144.15		$ 121.55
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price	170.04
Weighted Average Exercise Price, Exercises in Period (in dollars per share)	122.09
Weighted Average Exercise Price, Forfeitures in Period (in dollars per share)	0
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 122.09
Weighted Average Remaining Contractual Term, Outstanding (in years)	9 years 4 months 24 days
Aggregate Intrinsic Value, Outstanding	$ 2.9
Weighted Average Remaining Contractual Term, Exercisable (in years)	8 years 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value	$ 0.9

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SCHEDULE OF EARNINGS PER SHARE, BASIC AND DILUTED (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Earnings Per Share [Abstract]
Net income (loss) attributable to WESCO International, Inc.	$ 197.1	$ 181.2
Weighted average common shares outstanding used in computing basic earnings per share (in shares)	51.0	50.6
Common shares issuable upon exercise of dilutive stock options (in shares)	1.5	1.6
Weighted average common shares outstanding and common share equivalents used in computing diluted earnings per share (in shares)	52.5	52.2
Diluted (in dollars per share)	$ 3.48	$ 3.19
Basic (in dollars per share)	$ 3.58	$ 3.30
Net Income (Loss) Available to Common Stockholders, Basic	$ 182.7	$ 166.8
Preferred Stock Dividends, Income Statement Impact	$ 14.4	$ 14.4

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EARNINGS PER SHARE (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
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	0.4	0.1

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SCHEDULE OF DEBT (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Finance lease obligations	$ 22.6	$ 20.6
Total debt	5,650.3	5,467.3
Fair value adjustment to the Anixter Notes	0.1	0.3
Unamortized debt issuance costs	(47.7)	(51.1)
Short-term debt and current portion of long-term debt	(7.6)	(70.5)
Total long-term debt	5,595.1	5,346.0
Foreign Line of Credit
Debt Instrument [Line Items]
Long-term Debt	2.2	7.1
Accounts Receivable Securitization Facility
Debt Instrument [Line Items]
Long-term Debt	1,613.0	1,535.0
Revolving Credit Facility
Debt Instrument [Line Items]
Long-term Debt	1,189.8	1,023.6
5.50% Senior Notes due 2023
Debt Instrument [Line Items]
Long-term Debt	0.0	58.6
6.00% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term Debt	4.2	4.2
7.125% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term Debt	1,500.0	1,500.0
7.250% Senior Notes due 2028
Debt Instrument [Line Items]
Long-term Debt	1,318.5	1,318.2
Debt Instrument, Unamortized Discount	$ 6.5	$ 6.8

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DEBT (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Accounts Receivable Securitization Facility
Debt Instrument [Line Items]
Long-term Debt	$ 1,613.0	$ 1,535.0
Revolving Credit Facility
Debt Instrument [Line Items]
Long-term Debt	1,189.8	1,023.6
5.50% Senior Notes due 2023
Debt Instrument [Line Items]
Long-term Debt	0.0	58.6
6.00% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term Debt	4.2	4.2
7.125% Senior Notes due 2025
Debt Instrument [Line Items]
Long-term Debt	1,500.0	1,500.0
7.250% Senior Notes due 2028
Debt Instrument [Line Items]
Long-term Debt	$ 1,318.5	$ 1,318.2

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Defined Contribution Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Postemployment Benefits [Abstract]
Defined Contribution Plan, Cost	$ 21.4	$ 18.1

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Defined Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1.2	$ 2.2
Interest cost	5.4	4.4
Expected return on plan assets	(5.4)	(7.8)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(0.3)	(0.2)
Net periodic benefit cost	0.9	(1.4)
Defined Benefit Plan, Service Cost	1.2	2.2
Defined Benefit Plan, Plan Assets, Contributions by Employer	2.4
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.0	0.0
Interest cost	2.6	2.1
Expected return on plan assets	(2.4)	(3.5)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	0.0	0.0
Net periodic benefit cost	0.2	(1.4)
Defined Benefit Plan, Service Cost	0.0	0.0
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	1.2	2.2
Interest cost	2.8	2.3
Expected return on plan assets	(3.0)	(4.3)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(0.3)	(0.2)
Net periodic benefit cost	0.7	0.0
Defined Benefit Plan, Service Cost	1.2	2.2
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year	7.0
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Other Nonoperating Gains (Losses)	$ (0.3)	$ (3.6)

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Compensation Related Costs, Postemployment Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Defined Contribution Plan Disclosure [Line Items]
Service cost	$ 1.2	$ 2.2
Interest cost	5.4	4.4
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	5.4	7.8
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	0.3	0.2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	0.9	(1.4)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Defined Benefit Plan, Plan Assets, Contributions by Employer	2.4
WESCODeferredCompensationPlanMember
Defined Contribution Plan Disclosure [Line Items]
Deferred Compensation Liability, Classified, Noncurrent	24.7		$ 20.3
Pension Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other Nonoperating Gains (Losses)	(0.3)	(3.6)
UNITED STATES
Defined Contribution Plan Disclosure [Line Items]
Service cost	0.0	0.0
Interest cost	2.6	2.1
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	2.4	3.5
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	0.0	0.0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	0.2	(1.4)
Foreign Plan
Defined Contribution Plan Disclosure [Line Items]
Service cost	1.2	2.2
Interest cost	2.8	2.3
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	3.0	4.3
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	0.3	0.2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	$ 0.7	$ 0.0

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FAIR VALUE (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative, Notional Amount	$ 162.4	$ 172.8
Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	2,896.8	2,929.5
Long-term Debt	$ 2,822.8	$ 2,881.2

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INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Tax Contingency [Line Items]
Effective tax rate	18.30%	17.20%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount	$ 21.2	$ 5.8
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount	$ 13.4

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INCOME TAXES Income Tax Rates (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	18.30%	17.20%
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent	880.00%	870.00%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount	$ 21.2	$ 5.8

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Segment Reporting (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Segment Reporting [Abstract]
Revenues	$ 5,521.9	$ 4,932.2
Operating Income (Loss)	346.4	284.0
Adjusted EBITDA	420.7	364.1
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	5,521.9	4,932.2
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating Income (Loss)	346.4	284.0
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	14,971.2		$ 14,811.7
EES
Segment Reporting [Abstract]
Adjusted EBITDA	$ 183.0	$ 192.4
Adjusted EBITDA Margin %	8.60%	9.20%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,135.1	$ 2,090.0
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,490.9		4,480.4
CSS
Segment Reporting [Abstract]
Adjusted EBITDA	$ 155.5	$ 123.0
Adjusted EBITDA Margin %	9.00%	8.60%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,732.0	$ 1,434.2
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	5,586.0		5,504.0
UBS
Segment Reporting [Abstract]
Adjusted EBITDA	$ 187.7	$ 136.3
Adjusted EBITDA Margin %	11.30%	9.70%
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,654.8	$ 1,408.0
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	4,038.1		3,827.4
Corporate Segment
Segment Reporting [Abstract]
Adjusted EBITDA	(105.5)	$ (87.6)
Segment Reporting, Asset Reconciling Item [Line Items]
Assets	$ 856.2		$ 999.9

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Segment Reporting - ADJ EBITDA Reconciliations (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net Income (Loss) Available to Common Stockholders, Basic	$ 182.7	$ 166.8
Net (loss) income attributable to noncontrolling interest	0.1	0.4
Preferred Stock Dividends, Income Statement Impact	14.4	14.4
Provision for income taxes	44.1	37.7
Interest expense, net	95.0	63.6
Depreciation and amortization	44.4	47.0
Other expense, net	10.1	1.1
StockBasedCompensationExpenseEBITDA	10.4	7.5
MergerRelatedAndIntegrationCosts	19.5	25.6
Adjusted EBITDA	420.7	364.1
Stock-based compensation expense	11.7	8.9
Merger Related Stock Based Compensation Expense	1.3	1.4
EES
Net Income (Loss) Available to Common Stockholders, Basic	171.3	178.7
Net (loss) income attributable to noncontrolling interest	(0.1)	0.2
Preferred Stock Dividends, Income Statement Impact	0.0	0.0
Provision for income taxes	0.0	0.0
Interest expense, net	0.0	0.0
Depreciation and amortization	9.9	12.0
Other expense, net	0.5	(0.1)
StockBasedCompensationExpenseEBITDA	1.4	1.6
MergerRelatedAndIntegrationCosts	0.0	0.0
Adjusted EBITDA	$ 183.0	$ 192.4
Adjusted EBITDA Margin %	8.60%	9.20%
CSS
Net Income (Loss) Available to Common Stockholders, Basic	$ 135.4	$ 103.7
Net (loss) income attributable to noncontrolling interest	0.2	0.0
Preferred Stock Dividends, Income Statement Impact	0.0	0.0
Provision for income taxes	0.0	0.0
Interest expense, net	0.0	0.0
Depreciation and amortization	18.0	18.1
Other expense, net	0.8	0.3
StockBasedCompensationExpenseEBITDA	1.1	0.9
MergerRelatedAndIntegrationCosts	0.0	0.0
Adjusted EBITDA	$ 155.5	$ 123.0
Adjusted EBITDA Margin %	9.00%	8.60%
UBS
Net Income (Loss) Available to Common Stockholders, Basic	$ 180.3	$ 129.9
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
Interest expense, net	0.0	0.0
Depreciation and amortization	6.0	5.8
Other expense, net	0.6	0.0
StockBasedCompensationExpenseEBITDA	0.8	0.6
MergerRelatedAndIntegrationCosts	0.0	0.0
Adjusted EBITDA	$ 187.7	$ 136.3
Adjusted EBITDA Margin %	11.30%	9.70%
Corporate Segment
Net Income (Loss) Available to Common Stockholders, Basic	$ (304.3)	$ (245.5)
Net (loss) income attributable to noncontrolling interest	0.0	0.2
Preferred Stock Dividends, Income Statement Impact	14.4	14.4
Provision for income taxes	44.1	37.7
Interest expense, net	95.0	63.6
Depreciation and amortization	10.5	11.1
Other expense, net	8.2	0.9
StockBasedCompensationExpenseEBITDA	7.1	4.4
MergerRelatedAndIntegrationCosts	19.5	25.6
Adjusted EBITDA	$ (105.5)	$ (87.6)

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Business Combinations and Asset Acquisitions (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Asset Acquisition [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Reasons	The estimated fair values of assets acquired and liabilities assumed are based on preliminary calculations and valuations using estimates and assumptions at the time of acquisition. As the Company obtains additional information during the measurement period (not to exceed one year from the acquisition date), estimates and assumptions for the preliminary purchase consideration allocations may change materially.
Goodwill, Purchase Accounting Adjustments	$ 2.6
Rahi Systems
Asset Acquisition [Line Items]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual	$ 136.3
Business Acquisition, Description of Acquired Entity	Headquartered in Fremont, California, Rahi Systems is a leading provider of global hyperscale data center solutions with over 900 employees in 25 countries.
Business Combination, Reason for Business Combination	Rahi's expertise with complex information technology projects and global presence strengthen Wesco's data center solution offerings.
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory	$ 25.4
BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentAccountsPayable	28.0
Goodwill, Purchase Accounting Adjustments	$ 2.6