CDW (CDW) 10-Q 4 May 22 2022 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2022	Apr. 29, 2022
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	001-35985
Entity Registrant Name	CDW CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-0273989
Entity Address, Address Line One	75 Tri-State International
Entity Address, City or Town	Lincolnshire
Entity Address, State or Province	IL
Entity Address, Postal Zip Code	60069
City Area Code	847
Local Phone Number	465-6000
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	CDW
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
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 Common Stock, Shares Outstanding		135,115,720
Entity Central Index Key	0001402057
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Amendment Flag	false

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 386.9	$ 258.1
Accounts receivable, net of allowance for credit losses of $22.0 and $20.4, respectively	4,613.5	4,499.4
Merchandise inventory	1,054.6	927.6
Miscellaneous receivables	449.8	435.5
Prepaid expenses and other	366	357.5
Total current assets	6,870.8	6,478.1
Operating lease right-of-use assets	164	155.6
Property and equipment, net	195.6	195.8
Goodwill	4,376.5	4,382.9
Other intangible assets, net	1,584.6	1,628.1
Other assets	322.3	358.9
Total Assets	13,513.8	13,199.4
Current liabilities:
Accounts payable-trade	3,198.3	3,114.2
Accounts payable-inventory financing	564.9	448.3
Current maturities of long-term debt	83.9	102.7
Contract liabilities	443.8	402.9
Accrued expenses and other current liabilities:
Compensation	371.9	361.7
Advertising	162.1	145.5
Sales and income taxes	132.7	65.9
Other	507	454.8
Total current liabilities	5,464.6	5,096
Long-term liabilities:
Debt	6,514.8	6,755.8
Deferred income taxes	219.3	222.3
Operating lease liabilities	190.6	184.2
Other liabilities	231.4	235.4
Total long-term liabilities	7,156.1	7,397.7
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.01 par value, 100.0 shares authorized; no shares issued or outstanding for both periods	0	0
Common stock, $0.01 par value, 1,000.0 shares authorized; 135.1 and 134.8 shares outstanding, respectively	1.4	1.3
Paid-in capital	3,403.7	3,369.5
Accumulated deficit	(2,408.9)	(2,570.7)
Accumulated other comprehensive loss	(103.1)	(94.4)
Total stockholders’ equity	893.1	705.7
Total Liabilities and Stockholders’ Equity	$ 13,513.8	$ 13,199.4

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Allowance for credit loss, current	$ 22	$ 20.4
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, authorized (in shares)	100,000,000	100,000,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares outstanding (in shares)	135,100,000	134,800,000

Consolidated Statements Of Oper

Consolidated Statements Of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Net sales	$ 5,949.1	$ 4,837.5
Cost of sales	4,845	4,042.3
Gross profit	1,104.1	795.2
Selling and administrative expenses	717.2	471.8
Operating income	386.9	323.4
Interest expense, net	(56)	(35.6)
Other (expense) income, net	(0.5)	1.1
Income before income taxes	330.4	288.9
Income tax expense	(80.2)	(56.3)
Net income	$ 250.2	$ 232.6
Net income per common share:
Basic (in dollars per share)	$ 1.85	$ 1.65
Diluted (in dollars per share)	$ 1.83	$ 1.63
Weighted-average common shares outstanding:
Basic (in shares)	134.9	141.1
Diluted (in shares)	136.7	143.1

Consolidated Statements Of Comp

Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 250.2	$ 232.6
Other comprehensive income:
Unrealized gain from cash flow hedge, net of tax	0.4	0
Reclassification of cash flow hedge loss to net income, net of tax	0.8	0.4
Foreign currency translation, net of tax	(9.9)	6.3
Other comprehensive income (loss)	(8.7)	6.7
Comprehensive income	$ 241.5	$ 239.3

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 250.2	$ 232.6
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	71.4	45.2
Equity-based compensation expense	21.1	15.8
Deferred income taxes	(5)	(3.5)
Provision for credit losses	1.7	(1.3)
Other	4.8	2.6
Changes in assets and liabilities:
Accounts receivable	(125)	(15.7)
Merchandise inventory	(130.3)	15.4
Other assets	24.3	(35.8)
Accounts payable-trade	87.8	(37.2)
Other liabilities	179.8	126.5
Net cash provided by operating activities	380.8	344.6
Cash flows from investing activities:
Capital expenditures	(41.3)	(20.7)
Acquisitions of businesses, net of cash acquired	0	(212.9)
Net cash used in investing activities	(41.3)	(233.6)
Cash flows from financing activities:
Proceeds from borrowings under revolving credit facility	702.3	56.5
Repayments of borrowings under revolving credit facility	(895.2)	0
Repayments of long-term debt	(35.5)	(3.7)
Repayments of receivable financing liability	(28.7)	(1.1)
Payments to extinguish long-term debt	0	(56.5)
Net change in accounts payable-inventory financing	126.7	(180.3)
Financing payments for revenue generating assets	0	(42.9)
Repurchases of common stock	0	(358.4)
Proceeds from stock option exercises	8.3	37.7
Payment of incentive compensation plan withholding taxes	(20.4)	(27.8)
Dividend payments	(67.5)	(56.5)
Other	1.9	(10.5)
Net cash used in financing activities	(208.1)	(643.5)
Effect of exchange rate changes on cash and cash equivalents	(2.6)	0.9
Net increase (decrease) in cash and cash equivalents	128.8	(531.6)
Cash and cash equivalents—beginning of period	258.1	1,410.2
Cash and cash equivalents—end of period	386.9	878.6
Supplementary disclosure of cash flow information:
Interest paid	(17.5)	(19.2)
Income taxes paid, net	$ (11.5)	$ (10.1)

Consolidated Statement of Stock

Consolidated Statement of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, AdjustmentAccumulated Deficit
Beginning balance (in shares) at Dec. 31, 2020		141.9
Beginning balance at Dec. 31, 2020	$ 1,297.1	$ 1.4	$ 3,204.9	$ (1,813.4)	$ (95.8)	$ 19.2	$ 19.2
Shareholders' Equity (Deficit) [Roll Forward]
Net income	232.6			232.6
Equity-based compensation expense	15.8		15.8
Stock option exercises (in shares)		0.9
Stock option exercises	37.7		37.7
Coworker Stock Purchase Plan	3.9		3.9
Repurchases of common stock (in shares)		(2.4)
Repurchases of common stock	(358.4)			(358.4)
Dividends paid	(56.5)		0.3	(56.8)
Incentive compensation plan stock withheld for taxes	(27.8)			(27.8)
Unrealized gain from cash flow hedge, net of tax	0
Reclassification of hedge accounting loss to net income	0.4				0.4
Foreign currency translation	6.3				6.3
Ending balance (in shares) at Mar. 31, 2021		140.4
Ending balance at Mar. 31, 2021	1,170.3	$ 1.4	3,262.6	(2,004.6)	(89.1)
Beginning balance (in shares) at Dec. 31, 2021		134.8
Beginning balance at Dec. 31, 2021	705.7	$ 1.3	3,369.5	(2,570.7)	(94.4)
Shareholders' Equity (Deficit) [Roll Forward]
Net income	250.2			250.2
Equity-based compensation expense	21.1		21.1
Stock option exercises (in shares)		0.3
Stock option exercises	8.3	$ 0.1	8.2
Coworker Stock Purchase Plan	4.4		4.4
Dividends paid	(67.5)		0.5	(68)
Incentive compensation plan stock withheld for taxes	(20.4)			(20.4)
Unrealized gain from cash flow hedge, net of tax	0.4				0.4
Reclassification of hedge accounting loss to net income	0.8				0.8
Foreign currency translation	(9.9)				(9.9)
Ending balance (in shares) at Mar. 31, 2022		135.1
Ending balance at Mar. 31, 2022	$ 893.1	$ 1.4	$ 3,403.7	$ (2,408.9)	$ (103.1)

Consolidated Statements of Shar

Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Dividends (in dollars per share)	$ 0.50	$ 0.40
Accounting Standards Update [Extensible List]			Accounting Standards Update 2016-13 [Member]

Description of Business and Sum

Description of Business and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Description of Business and Summary of Significant Accounting Policies	Description of Business and Summary of Significant Accounting Policies Description of Business CDW Corporation (“Parent”), a Fortune 500 company and member of the S&P 500 Index, is a leading multi-brand provider of information technology (“IT”) solutions to small, medium and large business, government, education and healthcare customers in the United States (“US”), the United Kingdom (“UK”) and Canada. The Company’s broad array of offerings ranges from discrete hardware and software products to integrated IT solutions and services that include on-premise and cloud capabilities across hybrid infrastructure, digital experience and security. Throughout this report, the terms the “Company” and “CDW” refer to Parent and its 100% owned subsidiaries. Parent has two 100% owned subsidiaries, CDW LLC and CDW Finance Corporation. CDW LLC is an Illinois limited liability company that, together with its 100% owned subsidiaries, holds all material assets and conducts all business activities and operations of the Company. CDW Finance Corporation is a Delaware corporation formed for the sole purpose of acting as co-issuer of certain debt obligations and does not hold any material assets or engage in any business activities or operations. Basis of Presentation The accompanying unaudited interim Consolidated Financial Statements as of March 31, 2022 and for the three months ended March 31, 2022 and 2021 (the “Consolidated Financial Statements”) have been prepared in conformity with accounting principles generally accepted in the United States of America (“US GAAP”) and the rules and regulations of the US Securities and Exchange Commission (the “SEC”) for interim financial statements. Certain information and footnote disclosures normally included in financial statements prepared in accordance with US GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC. The presentation of the Consolidated Financial Statements requires the Company to make estimates and assumptions that affect reported amounts and related disclosures. In the opinion of management, the Consolidated Financial Statements contain all adjustments (consisting of a normal, recurring nature) necessary to present fairly the Company’s financial position, results of operations, comprehensive income, cash flows and changes in stockholders’ equity as of the dates and for the periods indicated. The unaudited results of operations for such interim periods reported are not necessarily indicative of results for the full year. These Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021 (the “December 31, 2021 Consolidated Financial Statements”). The significant accounting policies and estimates used in preparing these Consolidated Financial Statements were applied on a basis consistent with those reflected in the December 31, 2021 Consolidated Financial Statements. On December 1, 2021, the Company completed its acquisition of all issued and outstanding equity interests in Granite Parent, Inc., the parent company of Sirius Computer Solutions, Inc. (“Sirius”), a leading provider of secure, mission-critical technology-based solutions and one of the largest IT solutions integrators in the United States. The Company included the financial results of Sirius in its Consolidated Financial Statements from the date of the acquisition. Principles of Consolidation The Consolidated Financial Statements include the accounts of Parent and its 100% owned subsidiaries. All intercompany transactions and accounts are eliminated in consolidation. Reclassifications Certain prior period amounts included in the Financing activities of the Consolidated Statements of Cash Flows have been reclassified to conform with the current period presentation.

Recent Accounting Pronouncement

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2022
Accounting Standards Update and Change in Accounting Principle [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements

Acquisitions

Acquisitions	3 Months Ended
	Mar. 31, 2022
Business Combination and Asset Acquisition [Abstract]
Acquisitions	Acquisitions Sirius On December 1, 2021, the Company completed its acquisition of Sirius for an aggregate consideration paid, net of cash acquired, of approximately $2.4 billion, subject to the finalization of customary closing adjustments. The purchase price allocation is preliminary and is subject to change during the measurement period, which is not to exceed 12 months from the close of the acquisition. During the three months ended March 31, 2022, there have been no significant adjustments to the preliminary purchase price allocation from those disclosed in the Company’s December 31, 2021 Consolidated Financial Statements. At this time, the Company is in the process of finalizing the purchase price allocation, which includes finalizing the valuation assumptions for customer relationships, such as customer attrition rate, as well as the allocation of goodwill across the reporting units. Focal Point Data Risk LLC and certain affiliates (“Focal Point”) On July 30, 2021, the Company completed its acquisition of Focal Point through a purchase of all issued and outstanding equity interests. The purchase price allocation is preliminary and subject to customary closing adjustments and revision as additional information about fair value of assets and liabilities become available. There have been no adjustments to the preliminary purchase price allocation disclosed in the Company’s December 31, 2021 Consolidated Financial Statements. Amplified IT LLC (“Amplified IT”) On March 15, 2021, the Company completed its acquisition of Amplified IT through a purchase of all issued and outstanding membership interests. The purchase price allocation was final as of March 31, 2022. There were no adjustments to the preliminary purchase price allocation disclosed in the Company’s December 31, 2021 Consolidated Financial Statements.

Accounts Receivable and Contrac

Accounts Receivable and Contract Balances	3 Months Ended
	Mar. 31, 2022
Revenue from Contract with Customer [Abstract]
Accounts Receivable and Contract Balances	Accounts Receivable and Contract Balances Accounts Receivable The timing of revenue recognition may differ from the time of billing to customers. Accounts receivable presented on the Consolidated Balance Sheets represent an unconditional right to consideration, which includes unbilled receivables. Unbilled receivables represent revenues that are not currently billable but payment is unconditional and solely subject to the passage of time. These items are expected to be billed and collected in the normal course of business. The balance of the Company’s accounts receivable is classified as current for amounts expected to be collected within 12 months and noncurrent for amounts to be collected beyond 12 months. The following table details the total accounts receivable recognized and the related classification on the Consolidated Balance Sheets: March 31, 2022 December 31, 2021 Accounts receivable, current (1) $ 4,613.5 $ 4,499.4 Accounts receivable, noncurrent (2) 167.4 197.4 Total accounts receivable $ 4,780.9 $ 4,696.8 (1) Accounts receivable, current are presented within Accounts receivable, net of allowance for credit losses on the Consolidated Balance Sheets. (2) Accounts receivable, noncurrent are presented within Other assets on the Consolidated Balance Sheets. Contract Balances Contract assets and liabilities represent the difference in the timing of revenue recognition from receipt of cash from customers. Contract assets represent revenue recognized on performance obligations satisfied or partially satisfied for which the Company has no unconditional right to consideration. Contract liabilities consist of payments received from customers, or such consideration that is contractually due, in advance of providing the product or performing services. The following table details information about the Company’s contract balances recognized on the Consolidated Balance Sheets: March 31, 2022 December 31, 2021 Contract assets (1) $ 120.8 $ 134.7 Contract liabilities (2)(3) $ 465.8 $ 423.3 (1) Contract assets are presented within Prepaid expenses and other on the Consolidated Balance Sheets. (2) Includes $22 million and $20 million of long-term contract liabilities that are presented within Other liabilities on the Consolidated Balance Sheets as of March 31, 2022 and December 31, 2021, respectively. (3) During the three months ended March 31, 2022 and 2021, the Company recognized revenue of $156 million and $97 million, respectively, related to its contract liabilities that were included in the beginning balance of the respective periods. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. The following table represents the total transaction price for the remaining performance obligations as of March 31, 2022 related to non-cancelable contracts longer than 12 months in duration that is expected to be recognized over future periods. Within 1 Year Years 1-2 Years 2-3 Thereafter Remaining performance obligations $ 65.3 $ 22.5 $ 7.5 $ 2.5

Inventory Financing Agreements

Inventory Financing Agreements	3 Months Ended
	Mar. 31, 2022
Inventory Financing Agreements [Abstract]
Inventory Financing Agreements	Inventory Financing Agreements The Company has entered into agreements with certain financial intermediaries to facilitate the purchase of inventory from various suppliers under certain terms and conditions, as described below. These amounts are classified separately as Accounts payable-inventory financing on the Consolidated Balance Sheets. The Company does not incur any interest expense associated with these agreements as balances are paid when they are due. Amounts included in Accounts payable-inventory financing are as follows: March 31, 2022 December 31, 2021 Revolving Loan inventory financing agreement (1) $ 418.8 $ 310.1 Other inventory financing agreements 146.1 138.2 Accounts payable-inventory financing $ 564.9 $ 448.3 (1) The revolving credit facility includes an inventory floorplan sub-facility that enables the Company to maintain an inventory financing agreement with a financial intermediary.

Financial Instruments

Financial Instruments	3 Months Ended
	Mar. 31, 2022
Financial Instruments [Abstract]
Financial Instruments	Financial Instruments The Company does not hold or issue derivative financial instruments for trading or speculative purposes. The Company’s indebtedness creates interest rate risk on its variable-rate debt. The Company uses derivative financial instruments to manage its exposure to interest rate risk. For additional information, see Note 7 (Debt). The Company has interest rate cap agreements that entitle it to payments from the counterparty of the amount, if any, by which the three-month London Interbank Offered Rate (“LIBOR”) exceeds the strike rates of the caps during the agreement period in exchange for an upfront premium. During the three months ended March 31, 2022, the Company did not enter into new interest rate cap agreements. As of March 31, 2022 and December 31, 2021, the Company had interest rate cap agreements with a fair value of less than $1 million, which were classified within Other assets on the Consolidated Balance Sheets. The total notional amount of the interest rate cap agreements was $1.3 billion as of March 31, 2022 and December 31, 2021, which mature on December 31, 2022. The fair values of the Company’s interest rate cap agreements are classified as Level 2 in the fair value hierarchy. The valuation of the interest rate cap agreements is derived by using a discounted cash flow analysis on the expected cash receipts that would occur if variable interest rates rise above the strike rates of the caps. This analysis reflects the contractual terms of the interest rate cap agreements, including the period to maturity, and uses observable market-based inputs, including LIBOR curves and implied volatilities. The Company also incorporates insignificant credit valuation adjustments to appropriately reflect the respective counterparty’s nonperformance risk in the fair value measurements. The counterparty credit spreads are based on publicly available credit information obtained from a third-party credit data provider. The interest rate cap agreements are designated as cash flow hedges. The changes in the fair value of derivatives that qualify as cash flow hedges are recorded in Accumulated other comprehensive loss (“AOCL”) and are subsequently reclassified into Interest expense in the period when the hedged forecasted transaction affects earnings. The following table provides the activity in AOCL, net of tax, for the three months ended March 31, 2022 and 2021. Three Months Ended March 31, 2022 2021 Change in fair value recorded to AOCL $ 0.4 $ — Reclassification from AOCL to Interest expense, net $ 0.8 $ 0.4 The Company expects to reclassify $3 million from AOCL to earnings within Interest expense, net within the next 12 months.

Debt

Debt	3 Months Ended
	Mar. 31, 2022
Debt Disclosure [Abstract]
Debt	Debt As of March 31, 2022 As of December 31, 2021 Maturity Date Interest Rate Amount Interest Rate Amount Credit Facility Senior unsecured revolving loan facility December 2026 Variable $ 119.6 Variable $ 316.4 Term Loan Senior unsecured term loan facility December 2026 Variable 1,384.5 Variable 1,420.0 Unsecured Senior Notes Senior notes due 2024 December 2024 5.500 % 575.0 5.500 % 575.0 Senior notes due 2025 May 2025 4.125 % 600.0 4.125 % 600.0 Senior notes due 2028 April 2028 4.250 % 600.0 4.250 % 600.0 Senior notes due 2029 February 2029 3.250 % 700.0 3.250 % 700.0 Senior notes due 2026 December 2026 2.670 % 1,000.0 2.670 % 1,000.0 Senior notes due 2028 December 2028 3.276 % 500.0 3.276 % 500.0 Senior notes due 2031 December 2031 3.569 % 1,000.0 3.569 % 1,000.0 Total unsecured senior notes 4,975.0 4,975.0 Receivable financing liability 152.1 179.5 Other long-term obligations 11.5 13.6 Unamortized deferred financing fees (44.0) (46.0) Current maturities of long-term debt (83.9) (102.7) Total long-term debt $ 6,514.8 $ 6,755.8 As of March 31, 2022, the Company is in compliance with the covenants under its credit agreements and indentures. Credit Facility The Company has a variable rate senior unsecured revolving loan facility (the “Revolving Loan Facility”) from which it may draw tranches denominated in US dollars, British pounds or Euros. The interest rate is based on LIBOR plus a margin or an alternate base rate plus a margin, where the margin is based on the Company’s senior unsecured rating. The Revolving Loan Facility is used by the Company for borrowings, issuances of letters of credit and floorplan financing. As of March 31, 2022, the Company could have borrowed up to an additional $1.0 billion under the Revolving Loan Facility. As of March 31, 2022, the Revolving Loan Facility had less than $1 million of undrawn letters of credit and $437 million reserved for the floorplan sub-facility. Term Loan The senior unsecured term loan facility (the “Term Loan Facility”) has a variable interest rate, which has effectively been capped through the use of interest rate caps. The interest rate is based on LIBOR plus a margin, where the margin is determined by the Company’s senior unsecured credit rating. During the three months ended March 31, 2022, the Company prepaid its 2022 quarterly principal installments for a total of $36 million. The Company is required to pay quarterly principal installments of $18 million in 2023 and thereafter, with the remaining principal amount due at the maturity date. Unsecured Senior Notes The unsecured senior notes have a fixed interest rate, which is paid semi-annually. Receivable Financing As a result of the Sirius acquisition, the Company assumed liabilities related to receivable financing. Such amounts relate to certain accounts receivable transferred to third-party financial companies that did not qualify as a sale under the terms of the agreements. The proceeds from these arrangements are recognized as a liability and the associated accounts receivable remains on the Consolidated Balance Sheet until the liability is settled. The Company did not execute any transfers under these agreements during the three months ended March 31, 2022. Fair Value The fair values of the unsecured senior notes were estimated using quoted market prices for identical liabilities that are traded in over-the-counter secondary markets. The fair value of the Term Loan Facility was estimated using dealer quotes for identical liabilities in markets that are not considered active. The unsecured senior notes and Term Loan Facility were classified as Level 2 within the fair value hierarchy. The carrying value of the Revolving Loan Facility approximates fair value. The approximate fair values and related carrying values of the Company’s long-term debt, including current maturities and excluding unamortized discount and unamortized deferred financing costs, were as follows: March 31, 2022 December 31, 2021 Fair value $ 6,406.6 $ 6,996.0 Carrying value 6,642.7 6,904.5

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Income TaxesIncome tax expense was $80 million and $56 million for the three months ended March 31, 2022 and 2021, respectively. The effective tax rate was 24.3% and 19.5% for the three months ended March 31, 2022 and 2021, respectively. The effective tax rate for the three months ended March 31, 2022 differed from the US federal statutory rate of 21.0% primarily due to state and local income taxes, partially offset by excess tax benefits on equity-based compensation. The effective tax rate for the three months ended March 31, 2021 differed from the US federal statutory rate of 21.0% primarily due to excess tax benefits on equity-based compensation, partially offset by state and local income taxes.

Earnings Per Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share The numerator for both basic and diluted earnings per share is Net income. The denominator for basic earnings per share is the weighted-average shares outstanding during the period. A reconciliation of basic weighted-average shares outstanding to diluted weighted-average shares outstanding is as follows: Three Months Ended March 31, 2022 2021 Basic weighted-average shares outstanding 134.9 141.1 Effect of dilutive securities (1) 1.8 2.0 Diluted weighted-average shares outstanding (2) 136.7 143.1 (1) The dilutive effect of outstanding stock options, restricted stock units, performance share units and Coworker Stock Purchase Plan units is reflected in the diluted weighted-average shares outstanding using the treasury stock method. (2) There were fewer than 0.1 million potential common shares excluded from diluted weighted-average shares outstanding for both the three months ended March 31, 2022 and 2021 as their inclusion would have had an anti-dilutive effect.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies The Company is party to various legal proceedings that arise in the ordinary course of its business, which include commercial, intellectual property, employment, tort and other litigation matters. The Company is also subject to audit by federal, state, international, national, provincial and local authorities, and by various partners, group purchasing organizations and customers, including government agencies, relating to purchases and sales under various contracts. In addition, the Company is subject to indemnification claims under various contracts. From time to time, certain customers of the Company file voluntary petitions for reorganization or liquidation under the US bankruptcy laws or similar laws of the jurisdictions for the Company’s business activities outside of the US. In such cases, certain pre-petition payments received by the Company could be considered preference items and subject to return to the bankruptcy administrator. As of March 31, 2022, the Company does not believe that there is a reasonable possibility that any material loss exceeding the amounts already recognized for these proceedings and matters, if any, has been incurred. However, the ultimate resolutions of these proceedings and matters are inherently unpredictable. As such, the Company’s consolidated financial statements could be adversely affected in any particular period by the unfavorable resolution of one or more of these proceedings or matters. A subsidiary of the Company received a Civil Investigative Demand dated September 20, 2021 from the Department of Justice (“DOJ”) in connection with a False Claims Act investigation. The DOJ has requested information related to teaming agreements with original equipment manufacturers (“OEMs”). The Company is cooperating with the request and, given the early stage of the matter, the Company is currently unable to assess the probability of any outcome or the range of possible loss, if any.

Segment Information

Segment Information	3 Months Ended
	Mar. 31, 2022
Segment Reporting [Abstract]
Segment Information	Segment Information The Company’s segment information reflects the way the chief operating decision maker uses internal reporting to evaluate business performance, allocate resources and manage operations. The Company has three reportable segments: Corporate, which is comprised primarily of US private sector business customers with more than 250 employees, Small Business, which primarily serves US private sector business customers with up to 250 employees, and Public, which is comprised of government agencies and education and healthcare institutions in the US. The Company has two other operating segments: CDW UK and CDW Canada, both of which do not meet the reportable segment quantitative thresholds and, accordingly, are included in an all other category (“Other”). The Company has centralized logistics and headquarters functions that provide services to the segments. The logistics function includes purchasing, distribution and fulfillment services to support the Corporate, Small Business and Public segments. As a result, costs and intercompany charges associated with the logistics function are fully allocated to all of these segments based on a percent of Net sales. The centralized headquarters function provides services in areas such as accounting, information technology, marketing, legal and coworker services. Headquarters function costs that are not allocated to the segments are included under the heading of “Headquarters” in the tables below. Information about the Company’s segments is as follows: Corporate Small Business Public Other Headquarters Total Three Months Ended March 31, 2022 Net sales $ 2,627.6 $ 524.0 $ 2,033.0 $ 764.5 $ — $ 5,949.1 Operating income (loss) 210.0 46.7 141.8 36.7 (48.3) 386.9 Depreciation and amortization expense (25.0) (1.4) (16.3) (8.4) (20.3) (71.4) Three Months Ended March 31, 2021 Net sales $ 1,805.6 $ 432.7 $ 1,921.7 $ 677.5 $ — $ 4,837.5 Operating income (loss) 161.4 42.8 136.7 27.7 (45.2) 323.4 Depreciation and amortization expense (4.0) (0.8) (13.4) (8.6) (18.4) (45.2) Geographic Areas and Revenue Mix Three Months Ended March 31, 2022 Corporate Small Business Public Other Total Geography (1) United States $ 2,616.8 $ 524.0 $ 2,033.0 $ 4.6 $ 5,178.4 Rest of World 10.8 — — 759.9 770.7 Total Net sales 2,627.6 524.0 2,033.0 764.5 5,949.1 Major Product and Services Hardware 1,983.6 443.5 1,646.3 608.7 4,682.1 Software 399.8 59.8 253.2 85.6 798.4 Services 225.3 15.1 129.2 67.9 437.5 Other (2) 18.9 5.6 4.3 2.3 31.1 Total Net sales 2,627.6 524.0 2,033.0 764.5 5,949.1 Sales by Channel Corporate 2,627.6 — — — 2,627.6 Small Business — 524.0 — — 524.0 Government — — 543.9 — 543.9 Education — — 902.8 — 902.8 Healthcare — — 586.3 — 586.3 Other — — — 764.5 764.5 Total Net sales 2,627.6 524.0 2,033.0 764.5 5,949.1 Timing of Revenue Recognition Transferred at a point in time where CDW is principal 2,291.2 480.0 1,840.3 677.1 5,288.6 Transferred at a point in time where CDW is agent 180.6 34.3 96.3 29.5 340.7 Transferred over time where CDW is principal 155.8 9.7 96.4 57.9 319.8 Total Net sales $ 2,627.6 $ 524.0 $ 2,033.0 $ 764.5 $ 5,949.1 (1) Net sales by geography is generally based on the ship-to address with the exception of certain services that may be performed at, or on behalf of, multiple locations. Such service arrangements are categorized based on the bill-to address. (2) Includes items such as delivery charges to customers. Three Months Ended March 31, 2021 Corporate Small Business Public Other Total Geography (1) United States $ 1,803.5 $ 432.7 $ 1,921.7 $ 4.6 $ 4,162.5 Rest of World 2.1 — — 672.9 675.0 Total Net sales 1,805.6 432.7 1,921.7 677.5 4,837.5 Major Product and Services Hardware 1,420.6 368.1 1,664.9 511.6 3,965.2 Software 267.3 49.2 194.4 99.1 610.0 Services 102.5 10.1 57.9 63.2 233.7 Other (2) 15.2 5.3 4.5 3.6 28.6 Total Net sales 1,805.6 432.7 1,921.7 677.5 4,837.5 Sales by Channel Corporate 1,805.6 — — — 1,805.6 Small Business — 432.7 — — 432.7 Government — — 516.1 — 516.1 Education — — 943.3 — 943.3 Healthcare — — 462.3 — 462.3 Other — — — 677.5 677.5 Total Net sales 1,805.6 432.7 1,921.7 677.5 4,837.5 Timing of Revenue Recognition Transferred at a point in time where CDW is principal 1,627.7 402.0 1,825.9 600.6 4,456.2 Transferred at a point in time where CDW is agent 112.3 26.9 58.1 23.4 220.7 Transferred over time where CDW is principal 65.6 3.8 37.7 53.5 160.6 Total Net sales $ 1,805.6 $ 432.7 $ 1,921.7 $ 677.5 $ 4,837.5 (1) Net sales by geography is generally based on the ship-to address with the exception of certain services that may be performed at, or on behalf of, multiple locations. Such service arrangements are categorized based on the bill-to address. (2) Includes items such as delivery charges to customers. The following table presents Net sales by major category for the three months ended March 31, 2022 and 2021. Categories are based upon internal classifications. Three Months Ended March 31, 2022 2021 Net Sales Percentage Net Sales Percentage Notebooks/Mobile Devices $ 1,713.8 28.8 % $ 1,591.8 32.9 % Netcomm Products 486.4 8.2 454.7 9.4 Desktops 337.5 5.7 265.3 5.5 Video 485.9 8.2 326.2 6.7 Enterprise and Data Storage (Including Drives) 353.7 5.9 259.9 5.4 Other Hardware 1,304.8 21.9 1,067.3 22.1 Total Hardware 4,682.1 78.7 3,965.2 82.0 Software (1) 798.4 13.4 610.0 12.6 Services (1) 437.5 7.4 233.7 4.8 Other (2) 31.1 0.5 28.6 0.6 Total Net sales $ 5,949.1 100.0 % $ 4,837.5 100.0 % (1) Certain software and services revenues are recorded on a net basis as the Company is acting as an agent in the transaction. As a result, the category percentage of net revenues is not representative of the category percentage of gross profits. (2) Includes items such as delivery charges to customers.

Description of Business and S_2

Description of Business and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2022
Accounting Policies [Abstract]
Description of Business	Description of Business CDW Corporation (“Parent”), a Fortune 500 company and member of the S&P 500 Index, is a leading multi-brand provider of information technology (“IT”) solutions to small, medium and large business, government, education and healthcare customers in the United States (“US”), the United Kingdom (“UK”) and Canada. The Company’s broad array of offerings ranges from discrete hardware and software products to integrated IT solutions and services that include on-premise and cloud capabilities across hybrid infrastructure, digital experience and security. Throughout this report, the terms the “Company” and “CDW” refer to Parent and its 100% owned subsidiaries. Parent has two 100% owned subsidiaries, CDW LLC and CDW Finance Corporation. CDW LLC is an Illinois limited liability company that, together with its 100% owned subsidiaries, holds all material assets and conducts all business activities and operations of the Company. CDW Finance Corporation is a Delaware corporation formed for the sole purpose of acting as co-issuer of certain debt obligations and does not hold any material assets or engage in any business activities or operations.
Basis of Presentation	Basis of Presentation The accompanying unaudited interim Consolidated Financial Statements as of March 31, 2022 and for the three months ended March 31, 2022 and 2021 (the “Consolidated Financial Statements”) have been prepared in conformity with accounting principles generally accepted in the United States of America (“US GAAP”) and the rules and regulations of the US Securities and Exchange Commission (the “SEC”) for interim financial statements. Certain information and footnote disclosures normally included in financial statements prepared in accordance with US GAAP have been condensed or omitted pursuant to the rules and regulations of the SEC. The presentation of the Consolidated Financial Statements requires the Company to make estimates and assumptions that affect reported amounts and related disclosures. In the opinion of management, the Consolidated Financial Statements contain all adjustments (consisting of a normal, recurring nature) necessary to present fairly the Company’s financial position, results of operations, comprehensive income, cash flows and changes in stockholders’ equity as of the dates and for the periods indicated. The unaudited results of operations for such interim periods reported are not necessarily indicative of results for the full year. These Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2021 (the “December 31, 2021 Consolidated Financial Statements”). The significant accounting policies and estimates used in preparing these Consolidated Financial Statements were applied on a basis consistent with those reflected in the December 31, 2021 Consolidated Financial Statements.
Principles of Consolidation	Principles of Consolidation The Consolidated Financial Statements include the accounts of Parent and its 100% owned subsidiaries. All intercompany transactions and accounts are eliminated in consolidation.
Reclassifications	ReclassificationsCertain prior period amounts included in the Financing activities of the Consolidated Statements of Cash Flows have been reclassified to conform with the current period presentation
Recent Accounting Pronouncements	The Company did not adopt any material new accounting standards during the three months ended March 31, 2022. In addition, there are no new accounting standards not yet adopted that would be material to the Company’s Consolidated Financial Statements.

Accounts Receivable and Contr_2

Accounts Receivable and Contract Balances (Tables)	3 Months Ended
	Mar. 31, 2022
Revenue from Contract with Customer [Abstract]
Schedule of Accounts Receivable	The following table details the total accounts receivable recognized and the related classification on the Consolidated Balance Sheets: March 31, 2022 December 31, 2021 Accounts receivable, current (1) $ 4,613.5 $ 4,499.4 Accounts receivable, noncurrent (2) 167.4 197.4 Total accounts receivable $ 4,780.9 $ 4,696.8 (1) Accounts receivable, current are presented within Accounts receivable, net of allowance for credit losses on the Consolidated Balance Sheets. (2) Accounts receivable, noncurrent are presented within Other assets on the Consolidated Balance Sheets.
Schedule of Contract with Customer	The following table details information about the Company’s contract balances recognized on the Consolidated Balance Sheets: March 31, 2022 December 31, 2021 Contract assets (1) $ 120.8 $ 134.7 Contract liabilities (2)(3) $ 465.8 $ 423.3 (1) Contract assets are presented within Prepaid expenses and other on the Consolidated Balance Sheets. (2) Includes $22 million and $20 million of long-term contract liabilities that are presented within Other liabilities on the Consolidated Balance Sheets as of March 31, 2022 and December 31, 2021, respectively. (3) During the three months ended March 31, 2022 and 2021, the Company recognized revenue of $156 million and $97 million, respectively, related to its contract liabilities that were included in the beginning balance of the respective periods.
Schedule of Remaining Performance Obligations	The following table represents the total transaction price for the remaining performance obligations as of March 31, 2022 related to non-cancelable contracts longer than 12 months in duration that is expected to be recognized over future periods. Within 1 Year Years 1-2 Years 2-3 Thereafter Remaining performance obligations $ 65.3 $ 22.5 $ 7.5 $ 2.5

Inventory Financing Agreements

Inventory Financing Agreements (Tables)	3 Months Ended
	Mar. 31, 2022
Inventory Financing Agreements [Abstract]
Inventory Financing Agreements	Amounts included in Accounts payable-inventory financing are as follows: March 31, 2022 December 31, 2021 Revolving Loan inventory financing agreement (1) $ 418.8 $ 310.1 Other inventory financing agreements 146.1 138.2 Accounts payable-inventory financing $ 564.9 $ 448.3 (1) The revolving credit facility includes an inventory floorplan sub-facility that enables the Company to maintain an inventory financing agreement with a financial intermediary.

Financial Instruments (Tables)

Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2022
Financial Instruments [Abstract]
Schedule of Cash Flow Hedges Included in AOCL	The following table provides the activity in AOCL, net of tax, for the three months ended March 31, 2022 and 2021. Three Months Ended March 31, 2022 2021 Change in fair value recorded to AOCL $ 0.4 $ — Reclassification from AOCL to Interest expense, net $ 0.8 $ 0.4

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2022
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	As of March 31, 2022 As of December 31, 2021 Maturity Date Interest Rate Amount Interest Rate Amount Credit Facility Senior unsecured revolving loan facility December 2026 Variable $ 119.6 Variable $ 316.4 Term Loan Senior unsecured term loan facility December 2026 Variable 1,384.5 Variable 1,420.0 Unsecured Senior Notes Senior notes due 2024 December 2024 5.500 % 575.0 5.500 % 575.0 Senior notes due 2025 May 2025 4.125 % 600.0 4.125 % 600.0 Senior notes due 2028 April 2028 4.250 % 600.0 4.250 % 600.0 Senior notes due 2029 February 2029 3.250 % 700.0 3.250 % 700.0 Senior notes due 2026 December 2026 2.670 % 1,000.0 2.670 % 1,000.0 Senior notes due 2028 December 2028 3.276 % 500.0 3.276 % 500.0 Senior notes due 2031 December 2031 3.569 % 1,000.0 3.569 % 1,000.0 Total unsecured senior notes 4,975.0 4,975.0 Receivable financing liability 152.1 179.5 Other long-term obligations 11.5 13.6 Unamortized deferred financing fees (44.0) (46.0) Current maturities of long-term debt (83.9) (102.7) Total long-term debt $ 6,514.8 $ 6,755.8
Carrying Value of Long-Term Debt	The approximate fair values and related carrying values of the Company’s long-term debt, including current maturities and excluding unamortized discount and unamortized deferred financing costs, were as follows: March 31, 2022 December 31, 2021 Fair value $ 6,406.6 $ 6,996.0 Carrying value 6,642.7 6,904.5

Earnings Per Share (Tables)

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2022
Earnings Per Share [Abstract]
Schedule of Weighted Average Number of Shares	A reconciliation of basic weighted-average shares outstanding to diluted weighted-average shares outstanding is as follows: Three Months Ended March 31, 2022 2021 Basic weighted-average shares outstanding 134.9 141.1 Effect of dilutive securities (1) 1.8 2.0 Diluted weighted-average shares outstanding (2) 136.7 143.1 (1) The dilutive effect of outstanding stock options, restricted stock units, performance share units and Coworker Stock Purchase Plan units is reflected in the diluted weighted-average shares outstanding using the treasury stock method. (2) There were fewer than 0.1 million potential common shares excluded from diluted weighted-average shares outstanding for both the three months ended March 31, 2022 and 2021 as their inclusion would have had an anti-dilutive effect.

Segment Information (Tables)

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2022
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment	Information about the Company’s segments is as follows: Corporate Small Business Public Other Headquarters Total Three Months Ended March 31, 2022 Net sales $ 2,627.6 $ 524.0 $ 2,033.0 $ 764.5 $ — $ 5,949.1 Operating income (loss) 210.0 46.7 141.8 36.7 (48.3) 386.9 Depreciation and amortization expense (25.0) (1.4) (16.3) (8.4) (20.3) (71.4) Three Months Ended March 31, 2021 Net sales $ 1,805.6 $ 432.7 $ 1,921.7 $ 677.5 $ — $ 4,837.5 Operating income (loss) 161.4 42.8 136.7 27.7 (45.2) 323.4 Depreciation and amortization expense (4.0) (0.8) (13.4) (8.6) (18.4) (45.2)
Disaggregation of Revenue	Geographic Areas and Revenue Mix Three Months Ended March 31, 2022 Corporate Small Business Public Other Total Geography (1) United States $ 2,616.8 $ 524.0 $ 2,033.0 $ 4.6 $ 5,178.4 Rest of World 10.8 — — 759.9 770.7 Total Net sales 2,627.6 524.0 2,033.0 764.5 5,949.1 Major Product and Services Hardware 1,983.6 443.5 1,646.3 608.7 4,682.1 Software 399.8 59.8 253.2 85.6 798.4 Services 225.3 15.1 129.2 67.9 437.5 Other (2) 18.9 5.6 4.3 2.3 31.1 Total Net sales 2,627.6 524.0 2,033.0 764.5 5,949.1 Sales by Channel Corporate 2,627.6 — — — 2,627.6 Small Business — 524.0 — — 524.0 Government — — 543.9 — 543.9 Education — — 902.8 — 902.8 Healthcare — — 586.3 — 586.3 Other — — — 764.5 764.5 Total Net sales 2,627.6 524.0 2,033.0 764.5 5,949.1 Timing of Revenue Recognition Transferred at a point in time where CDW is principal 2,291.2 480.0 1,840.3 677.1 5,288.6 Transferred at a point in time where CDW is agent 180.6 34.3 96.3 29.5 340.7 Transferred over time where CDW is principal 155.8 9.7 96.4 57.9 319.8 Total Net sales $ 2,627.6 $ 524.0 $ 2,033.0 $ 764.5 $ 5,949.1 (1) Net sales by geography is generally based on the ship-to address with the exception of certain services that may be performed at, or on behalf of, multiple locations. Such service arrangements are categorized based on the bill-to address. (2) Includes items such as delivery charges to customers. Three Months Ended March 31, 2021 Corporate Small Business Public Other Total Geography (1) United States $ 1,803.5 $ 432.7 $ 1,921.7 $ 4.6 $ 4,162.5 Rest of World 2.1 — — 672.9 675.0 Total Net sales 1,805.6 432.7 1,921.7 677.5 4,837.5 Major Product and Services Hardware 1,420.6 368.1 1,664.9 511.6 3,965.2 Software 267.3 49.2 194.4 99.1 610.0 Services 102.5 10.1 57.9 63.2 233.7 Other (2) 15.2 5.3 4.5 3.6 28.6 Total Net sales 1,805.6 432.7 1,921.7 677.5 4,837.5 Sales by Channel Corporate 1,805.6 — — — 1,805.6 Small Business — 432.7 — — 432.7 Government — — 516.1 — 516.1 Education — — 943.3 — 943.3 Healthcare — — 462.3 — 462.3 Other — — — 677.5 677.5 Total Net sales 1,805.6 432.7 1,921.7 677.5 4,837.5 Timing of Revenue Recognition Transferred at a point in time where CDW is principal 1,627.7 402.0 1,825.9 600.6 4,456.2 Transferred at a point in time where CDW is agent 112.3 26.9 58.1 23.4 220.7 Transferred over time where CDW is principal 65.6 3.8 37.7 53.5 160.6 Total Net sales $ 1,805.6 $ 432.7 $ 1,921.7 $ 677.5 $ 4,837.5 (1) Net sales by geography is generally based on the ship-to address with the exception of certain services that may be performed at, or on behalf of, multiple locations. Such service arrangements are categorized based on the bill-to address. (2) Includes items such as delivery charges to customers. The following table presents Net sales by major category for the three months ended March 31, 2022 and 2021. Categories are based upon internal classifications. Three Months Ended March 31, 2022 2021 Net Sales Percentage Net Sales Percentage Notebooks/Mobile Devices $ 1,713.8 28.8 % $ 1,591.8 32.9 % Netcomm Products 486.4 8.2 454.7 9.4 Desktops 337.5 5.7 265.3 5.5 Video 485.9 8.2 326.2 6.7 Enterprise and Data Storage (Including Drives) 353.7 5.9 259.9 5.4 Other Hardware 1,304.8 21.9 1,067.3 22.1 Total Hardware 4,682.1 78.7 3,965.2 82.0 Software (1) 798.4 13.4 610.0 12.6 Services (1) 437.5 7.4 233.7 4.8 Other (2) 31.1 0.5 28.6 0.6 Total Net sales $ 5,949.1 100.0 % $ 4,837.5 100.0 % (1) Certain software and services revenues are recorded on a net basis as the Company is acting as an agent in the transaction. As a result, the category percentage of net revenues is not representative of the category percentage of gross profits. (2) Includes items such as delivery charges to customers.

Description of Business and S_3

Description of Business and Summary of Significant Accounting Policies (Details)	Mar. 31, 2022subsidiary
Accounting Policies [Abstract]
Number of owned subsidiaries	2

Acquisitions (Details)

Acquisitions (Details) $ in Billions	Dec. 01, 2021USD ($)
Sirius Computer Solutions Inc
Business Acquisition [Line Items]
Purchase price	$ 2.4

Accounts Receivable and Contr_3

Accounts Receivable and Contract Balances - Schedule of Accounts Receivable (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Accounts receivable, current	$ 4,613.5	$ 4,499.4
Accounts receivable, noncurrent	167.4	197.4
Total accounts receivable	$ 4,780.9	$ 4,696.8

Accounts Receivable and Contr_4

Accounts Receivable and Contract Balances - Schedule of Contract with Customer (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract assets	$ 120.8		$ 134.7
Contract liabilities	465.8		423.3
Revenue recognized from contract with customer	156	$ 97
Long-term Contract with Customer
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract liabilities	$ 22		$ 20

Accounts Receivable and Contr_5

Accounts Receivable and Contract Balances - Schedule of Remaining Performance Obligations (Details) $ in Millions	Mar. 31, 2022USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligations	$ 65.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligations	$ 22.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligations	$ 7.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, expected timing of satisfaction, period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligations	$ 2.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligations, expected timing of satisfaction, period

Inventory Financing Agreement_2

Inventory Financing Agreements (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Inventory Financing Agreements [Line Items]
Accounts payable-inventory financing	$ 564.9	$ 448.3
Accounts Payable, Inventory Financing
Inventory Financing Agreements [Line Items]
Revolving Loan inventory financing agreement	418.8	310.1
Other inventory financing agreements	$ 146.1	$ 138.2

Financial Instruments - (Detail

Financial Instruments - (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Derivative [Line Items]
Interest rate cap, fair value	$ 1		$ 1
Unrealized (loss) gain from hedge accounting	(0.4)	$ 0
Interest Rate Cap
Derivative [Line Items]
Notional amount	1,300		$ 1,300
Interest Rate Contract
Derivative [Line Items]
Unrealized (loss) gain from hedge accounting	0.4	0
Amount expected to be reclassified from AOCL to interest expense in next twelve months	3
Derivative
Derivative [Line Items]
Interest income (expense) reclassified into earnings	$ 0.8	$ 0.4

Debt - Debt Balances and Intere

Debt - Debt Balances and Interest Rates (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt	$ 6,642.7	$ 6,904.5
Unamortized deferred financing fees	(44)	(46)
Current maturities of long-term debt	(83.9)	(102.7)
Total long-term debt	6,514.8	6,755.8
Senior unsecured revolving loan facility
Debt Instrument [Line Items]
Long-term debt	119.6	316.4
Senior unsecured term loan facility
Debt Instrument [Line Items]
Long-term debt	1,384.5	1,420
Total unsecured senior notes
Debt Instrument [Line Items]
Long-term debt	$ 4,975	$ 4,975
Senior notes due 2024
Debt Instrument [Line Items]
Interest rate in effect	5.50%	5.50%
Long-term debt	$ 575	$ 575
Senior notes due 2025
Debt Instrument [Line Items]
Interest rate in effect	4.125%	4.125%
Long-term debt	$ 600	$ 600
Senior notes due 2028
Debt Instrument [Line Items]
Interest rate in effect	4.25%	4.25%
Long-term debt	$ 600	$ 600
Senior notes due 2029
Debt Instrument [Line Items]
Interest rate in effect	3.25%	3.25%
Long-term debt	$ 700	$ 700
Senior notes due 2026
Debt Instrument [Line Items]
Interest rate in effect	2.67%	2.67%
Long-term debt	$ 1,000	$ 1,000
Senior notes due 2028
Debt Instrument [Line Items]
Interest rate in effect	3.276%	3.276%
Long-term debt	$ 500	$ 500
Senior notes due 2031
Debt Instrument [Line Items]
Interest rate in effect	3.569%	3.569%
Long-term debt	$ 1,000	$ 1,000
Receivable financing liability
Debt Instrument [Line Items]
Long-term debt	152.1	179.5
Other long-term obligations
Debt Instrument [Line Items]
Long-term debt	$ 11.5	$ 13.6

Debt - Narrative (Details)

Debt - Narrative (Details) $ in Millions	Mar. 31, 2022USD ($)
Senior unsecured revolving loan facility
Debt Instrument [Line Items]
Additional borrowing capacity	$ 1,000
Undrawn letters of credit	1
Senior unsecured revolving loan facility | Accounts Payable, Inventory Financing
Debt Instrument [Line Items]
Amount owed under Revolving loan financing agreement	437
Senior unsecured term loan facility
Debt Instrument [Line Items]
Debt Instrument, Annual Principal Payment	36
2023 and thereafter	$ 18

Debt - Fair Value of Long-Term

Debt - Fair Value of Long-Term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Carrying value	$ 6,642.7	$ 6,904.5
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value	$ 6,406.6	$ 6,996

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Income tax (expense) benefit	$ (80.2)	$ (56.3)
Effective income tax rate reconciliation, percent	24.30%	19.50%

Earnings Per Share (Details)

Earnings Per Share (Details) - shares shares in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Basic weighted-average shares outstanding (in shares)	134.9	141.1
Effect of dilutive securities (in shares)	1.8	2
Diluted weighted-average shares outstanding (in shares)	136.7	143.1
Anti-dilutive shares (fewer than) (in shares)	0.1	0.1

Segment Information - Narrative

Segment Information - Narrative (Details)	3 Months Ended
	Mar. 31, 2022segmentemployee
Segment Reporting Information [Line Items]
Number of reportable segments | segment	3
Number of operating segments which do not meet reportable unit quantitative threshold | segment	2
Minimum | Corporate
Segment Reporting Information [Line Items]
Customer segments, customer employee headcount | employee	250
Maximum | Small Business
Segment Reporting Information [Line Items]
Customer segments, customer employee headcount | employee	250

Segment Information - Schedule

Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting Information [Line Items]
Net sales	$ 5,949.1	$ 4,837.5
Income (loss) from operations	386.9	323.4
Depreciation and amortization expense	(71.4)	(45.2)
Corporate
Segment Reporting Information [Line Items]
Net sales	2,627.6	1,805.6
Small Business
Segment Reporting Information [Line Items]
Net sales	524	432.7
Public
Segment Reporting Information [Line Items]
Net sales	2,033	1,921.7
Other
Segment Reporting Information [Line Items]
Net sales	764.5	677.5
Operating Segments | Corporate
Segment Reporting Information [Line Items]
Net sales	2,627.6	1,805.6
Income (loss) from operations	210	161.4
Depreciation and amortization expense	(25)	(4)
Operating Segments | Small Business
Segment Reporting Information [Line Items]
Net sales	524	432.7
Income (loss) from operations	46.7	42.8
Depreciation and amortization expense	(1.4)	(0.8)
Operating Segments | Public
Segment Reporting Information [Line Items]
Net sales	2,033	1,921.7
Income (loss) from operations	141.8	136.7
Depreciation and amortization expense	(16.3)	(13.4)
Operating Segments | Other
Segment Reporting Information [Line Items]
Net sales	764.5	677.5
Income (loss) from operations	36.7	27.7
Depreciation and amortization expense	(8.4)	(8.6)
Headquarters
Segment Reporting Information [Line Items]
Net sales	0	0
Income (loss) from operations	(48.3)	(45.2)
Depreciation and amortization expense	$ (20.3)	$ (18.4)

Segment Information - Disaggreg

Segment Information - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 5,949.1	$ 4,837.5
Percentage of Total Net Sales	100.00%	100.00%
Corporate
Disaggregation of Revenue [Line Items]
Net sales	$ 2,627.6	$ 1,805.6
Small Business
Disaggregation of Revenue [Line Items]
Net sales	524	432.7
Public
Disaggregation of Revenue [Line Items]
Net sales	2,033	1,921.7
Other
Disaggregation of Revenue [Line Items]
Net sales	764.5	677.5
Transferred at a point in time where CDW is principal
Disaggregation of Revenue [Line Items]
Net sales	5,288.6	4,456.2
Transferred at a point in time where CDW is principal | Corporate
Disaggregation of Revenue [Line Items]
Net sales	2,291.2	1,627.7
Transferred at a point in time where CDW is principal | Small Business
Disaggregation of Revenue [Line Items]
Net sales	480	402
Transferred at a point in time where CDW is principal | Public
Disaggregation of Revenue [Line Items]
Net sales	1,840.3	1,825.9
Transferred at a point in time where CDW is principal | Other
Disaggregation of Revenue [Line Items]
Net sales	677.1	600.6
Transferred at a point in time where CDW is agent
Disaggregation of Revenue [Line Items]
Net sales	340.7	220.7
Transferred at a point in time where CDW is agent | Corporate
Disaggregation of Revenue [Line Items]
Net sales	180.6	112.3
Transferred at a point in time where CDW is agent | Small Business
Disaggregation of Revenue [Line Items]
Net sales	34.3	26.9
Transferred at a point in time where CDW is agent | Public
Disaggregation of Revenue [Line Items]
Net sales	96.3	58.1
Transferred at a point in time where CDW is agent | Other
Disaggregation of Revenue [Line Items]
Net sales	29.5	23.4
Transferred over time where CDW is principal
Disaggregation of Revenue [Line Items]
Net sales	319.8	160.6
Transferred over time where CDW is principal | Corporate
Disaggregation of Revenue [Line Items]
Net sales	155.8	65.6
Transferred over time where CDW is principal | Small Business
Disaggregation of Revenue [Line Items]
Net sales	9.7	3.8
Transferred over time where CDW is principal | Public
Disaggregation of Revenue [Line Items]
Net sales	96.4	37.7
Transferred over time where CDW is principal | Other
Disaggregation of Revenue [Line Items]
Net sales	57.9	53.5
Corporate
Disaggregation of Revenue [Line Items]
Net sales	2,627.6	1,805.6
Corporate | Corporate
Disaggregation of Revenue [Line Items]
Net sales	2,627.6	1,805.6
Corporate | Small Business
Disaggregation of Revenue [Line Items]
Net sales	0	0
Corporate | Public
Disaggregation of Revenue [Line Items]
Net sales	0	0
Corporate | Other
Disaggregation of Revenue [Line Items]
Net sales	0	0
Small Business
Disaggregation of Revenue [Line Items]
Net sales	524	432.7
Small Business | Corporate
Disaggregation of Revenue [Line Items]
Net sales	0	0
Small Business | Small Business
Disaggregation of Revenue [Line Items]
Net sales	524	432.7
Small Business | Public
Disaggregation of Revenue [Line Items]
Net sales	0	0
Small Business | Other
Disaggregation of Revenue [Line Items]
Net sales	0	0
Government
Disaggregation of Revenue [Line Items]
Net sales	543.9	516.1
Government | Corporate
Disaggregation of Revenue [Line Items]
Net sales	0	0
Government | Small Business
Disaggregation of Revenue [Line Items]
Net sales	0	0
Government | Public
Disaggregation of Revenue [Line Items]
Net sales	543.9	516.1
Government | Other
Disaggregation of Revenue [Line Items]
Net sales	0	0
Education
Disaggregation of Revenue [Line Items]
Net sales	902.8	943.3
Education | Corporate
Disaggregation of Revenue [Line Items]
Net sales	0	0
Education | Small Business
Disaggregation of Revenue [Line Items]
Net sales	0	0
Education | Public
Disaggregation of Revenue [Line Items]
Net sales	902.8	943.3
Education | Other
Disaggregation of Revenue [Line Items]
Net sales	0	0
Healthcare
Disaggregation of Revenue [Line Items]
Net sales	586.3	462.3
Healthcare | Corporate
Disaggregation of Revenue [Line Items]
Net sales	0	0
Healthcare | Small Business
Disaggregation of Revenue [Line Items]
Net sales	0	0
Healthcare | Public
Disaggregation of Revenue [Line Items]
Net sales	586.3	462.3
Healthcare | Other
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other
Disaggregation of Revenue [Line Items]
Net sales	764.5	677.5
Other | Corporate
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other | Small Business
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other | Public
Disaggregation of Revenue [Line Items]
Net sales	0	0
Other | Other
Disaggregation of Revenue [Line Items]
Net sales	764.5	677.5
Hardware
Disaggregation of Revenue [Line Items]
Net sales	$ 4,682.1	$ 3,965.2
Percentage of Total Net Sales	78.70%	82.00%
Hardware | Corporate
Disaggregation of Revenue [Line Items]
Net sales	$ 1,983.6	$ 1,420.6
Hardware | Small Business
Disaggregation of Revenue [Line Items]
Net sales	443.5	368.1
Hardware | Public
Disaggregation of Revenue [Line Items]
Net sales	1,646.3	1,664.9
Hardware | Other
Disaggregation of Revenue [Line Items]
Net sales	608.7	511.6
Notebooks/Mobile Devices
Disaggregation of Revenue [Line Items]
Net sales	$ 1,713.8	$ 1,591.8
Percentage of Total Net Sales	28.80%	32.90%
Netcomm Products
Disaggregation of Revenue [Line Items]
Net sales	$ 486.4	$ 454.7
Percentage of Total Net Sales	8.20%	9.40%
Desktops
Disaggregation of Revenue [Line Items]
Net sales	$ 337.5	$ 265.3
Percentage of Total Net Sales	5.70%	5.50%
Video
Disaggregation of Revenue [Line Items]
Net sales	$ 485.9	$ 326.2
Percentage of Total Net Sales	8.20%	6.70%
Enterprise and Data Storage (Including Drives)
Disaggregation of Revenue [Line Items]
Net sales	$ 353.7	$ 259.9
Percentage of Total Net Sales	5.90%	5.40%
Other Hardware
Disaggregation of Revenue [Line Items]
Net sales	$ 1,304.8	$ 1,067.3
Percentage of Total Net Sales	21.90%	22.10%
Software
Disaggregation of Revenue [Line Items]
Net sales	$ 798.4	$ 610
Percentage of Total Net Sales	13.40%	12.60%
Software | Corporate
Disaggregation of Revenue [Line Items]
Net sales	$ 399.8	$ 267.3
Software | Small Business
Disaggregation of Revenue [Line Items]
Net sales	59.8	49.2
Software | Public
Disaggregation of Revenue [Line Items]
Net sales	253.2	194.4
Software | Other
Disaggregation of Revenue [Line Items]
Net sales	85.6	99.1
Services
Disaggregation of Revenue [Line Items]
Net sales	$ 437.5	$ 233.7
Percentage of Total Net Sales	7.40%	4.80%
Services | Corporate
Disaggregation of Revenue [Line Items]
Net sales	$ 225.3	$ 102.5
Services | Small Business
Disaggregation of Revenue [Line Items]
Net sales	15.1	10.1
Services | Public
Disaggregation of Revenue [Line Items]
Net sales	129.2	57.9
Services | Other
Disaggregation of Revenue [Line Items]
Net sales	67.9	63.2
Other
Disaggregation of Revenue [Line Items]
Net sales	$ 31.1	$ 28.6
Percentage of Total Net Sales	0.50%	0.60%
Other | Corporate
Disaggregation of Revenue [Line Items]
Net sales	$ 18.9	$ 15.2
Other | Small Business
Disaggregation of Revenue [Line Items]
Net sales	5.6	5.3
Other | Public
Disaggregation of Revenue [Line Items]
Net sales	4.3	4.5
Other | Other
Disaggregation of Revenue [Line Items]
Net sales	2.3	3.6
United States
Disaggregation of Revenue [Line Items]
Net sales	5,178.4	4,162.5
United States | Corporate
Disaggregation of Revenue [Line Items]
Net sales	2,616.8	1,803.5
United States | Small Business
Disaggregation of Revenue [Line Items]
Net sales	524	432.7
United States | Public
Disaggregation of Revenue [Line Items]
Net sales	2,033	1,921.7
United States | Other
Disaggregation of Revenue [Line Items]
Net sales	4.6	4.6
Rest of World
Disaggregation of Revenue [Line Items]
Net sales	770.7	675
Rest of World | Corporate
Disaggregation of Revenue [Line Items]
Net sales	10.8	2.1
Rest of World | Small Business
Disaggregation of Revenue [Line Items]
Net sales	0	0
Rest of World | Public
Disaggregation of Revenue [Line Items]
Net sales	0	0
Rest of World | Other
Disaggregation of Revenue [Line Items]
Net sales	$ 759.9	$ 672.9