10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

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

For the quarterly period ended June 30, 2013

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 001-35985

CDW CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	26-0273989
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
200 N. Milwaukee Avenue Vernon Hills, Illinois	60061
(Address of principal executive offices)	(Zip Code)

(847) 465-6000

(Registrant’s telephone number, including area code)

None

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

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 shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    ¨  Yes    ý  No The registrant has been subject to the filing requirements of Sections 13 and 15(d) for less than 90 days since the registrant's Registration Statement on Form S-1 was declared effective by the Commission on June 26, 2013.  The registrant has filed (a) all reports required to be filed by it since that date and (b) all reports which it would have been required to file during the preceding 12 months had it been subject to such provisions.

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted 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).    ý  Yes    ¨  No

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” accelerated filer,” and “smaller reporting company” in Rule 12b-2 of the Exchange Act (Check one):

Large accelerated filer	¨	Accelerated filer	¨
Non-accelerated filer	x  (Do not check if a smaller reporting company)	Smaller reporting company	¨

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

As of August 8, 2013, there were 171,957,228 common shares, $0.01 par value, outstanding.

1

CDW CORPORATION AND SUBSIDIARIES

FORM 10-Q

TABLE OF CONTENTS

		Page
PART I	FINANCIAL INFORMATION
Item 1.	Financial Statements:
	Consolidated Balance Sheets as of June 30, 2013 and December 31, 2012	3
	Consolidated Statements of Operations for the Three and Six Months Ended June 30, 2013 and June 30, 2012	4
	Consolidated Statements of Comprehensive Income for the Three and Six Months Ended June 30, 2013 and June 30, 2012	5
	Consolidated Statement of Shareholders’ Equity for the Six Months Ended June 30, 2013	6
	Consolidated Statements of Cash Flows for the Six Months Ended June 30, 2013 and June 30, 2012	7
	Notes to Consolidated Financial Statements	8
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	31
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	50
Item 4.	Controls and Procedures	51
PART II	OTHER INFORMATION
Item 1.	Legal Proceedings	51
Item 1A.	Risk Factors	51
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	51
Item 3.	Defaults Upon Senior Securities	52
Item 4.	Mine Safety Disclosures	52
Item 5.	Other Information	52
Item 6.	Exhibits	54
SIGNATURES		56

2

PART I—FINANCIAL INFORMATION

Item 1. Financial Statements

CDW CORPORATION AND SUBSIDIARIES CONSOLIDATED BALANCE SHEETS (in millions, except per-share amounts)
	June 30, 2013			December 31, 2012
Assets	(unaudited)
Current assets:
Cash and cash equivalents	$	179.3		$	37.9
Accounts receivable, net of allowance for doubtful accounts of $5.4 and $5.4, respectively	1,390.5			1,285.0
Merchandise inventory	378.5			314.6
Miscellaneous receivables	165.1			148.5
Deferred income taxes	12.1			14.1
Prepaid expenses and other	108.2			34.6
Total current assets	2,233.7			1,834.7
Property and equipment, net	132.7			142.7
Goodwill	2,207.4			2,209.3
Other intangible assets, net	1,403.7			1,478.5
Deferred financing costs, net	41.4			53.2
Other assets	1.6			1.6
Total assets	$	6,020.5		$	5,720.0
Liabilities and Shareholders’ Equity
Current liabilities:
Accounts payable—trade	$	771.0		$	518.6
Accounts payable—inventory financing	282.5			249.2
Current maturities of long-term debt	13.5			40.0
Deferred revenue	96.9			57.8
Accrued expenses:
Compensation	93.7			99.4
Interest	47.0			50.7
Sales taxes	20.2			22.6
Advertising	23.7			33.9
Income taxes	5.6			0.2
Other	91.1			95.8
Total current liabilities	1,445.2			1,168.2
Long-term liabilities:
Debt	3,710.9			3,731.0
Deferred income taxes	598.3			624.3
Accrued interest	6.4			8.0
Other liabilities	50.7			52.0
Total long-term liabilities	4,366.3			4,415.3
Commitments and contingencies
Shareholders’ equity:
Preferred shares, $0.01 par value, 100.0 and no shares authorized, respectively; no shares issued or outstanding for both periods	—			—
Common shares, $0.01 par value, 1,000.0 and 286.1 shares authorized, respectively; 145.2 shares issued for both periods; 145.2 and 145.1 shares outstanding, respectively	1.4			1.4
Paid-in capital	2,211.0			2,207.7
Accumulated deficit	(1,998.1		)	(2,073.0		)
Accumulated other comprehensive (loss) income	(5.3		)	0.4
Total shareholders’ equity	209.0			136.5
Total liabilities and shareholders’ equity	$	6,020.5		$	5,720.0

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

3

CDW CORPORATION AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF OPERATIONS (in millions, except per-share amounts) (unaudited)
	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Net sales	$	2,779.3		$	2,584.7		$	5,191.0		$	4,903.9
Cost of sales	2,327.7			2,157.8			4,337.4			4,092.4
Gross profit	451.6			426.9			853.6			811.5
Selling and administrative expenses	266.4			259.5			517.9			511.1
Advertising expense	31.6			31.0			62.0			60.4
Income from operations	153.6			136.4			273.7			240.0
Interest expense, net	(70.3		)	(76.9		)	(142.4		)	(155.8		)
Net loss on extinguishments of long-term debt	(10.3		)	—			(14.2		)	(9.4		)
Other income, net	0.2			0.2			0.6			—
Income before income taxes	73.2			59.7			117.7			74.8
Income tax expense	(26.5		)	(22.9		)	(42.7		)	(27.1		)
Net income	$	46.7		$	36.8		$	75.0		$	47.7
Net income per common share:
Basic	$	0.32		$	0.25		$	0.52		$	0.33
Diluted	$	0.32		$	0.25		$	0.51		$	0.33
Weighted-average number of common shares outstanding:
Basic	145.3			145.1			145.2			145.0
Diluted	146.7			145.8			146.5			145.8

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

4

CDW CORPORATION AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (in millions) (unaudited)
	Three Months Ended June 30,						Six Months Ended June 30,
	2013			2012			2013			2012
Net income	$	46.7		$	36.8		$	75.0		$	47.7
Foreign currency translation adjustment	(3.3		)	(1.6		)	(5.7		)	0.3
Other comprehensive (loss) income	$	(3.3	)	$	(1.6	)	$	(5.7	)	$	0.3
Comprehensive income	$	43.4		$	35.2		$	69.3		$	48.0

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

5

CDW CORPORATION AND SUBSIDIARIES CONSOLIDATED STATEMENT OF SHAREHOLDERS’ EQUITY (in millions) (unaudited)
	Total Shareholders’ Equity			Preferred Shares		Common Shares		Paid-in Capital			Accumulated Deficit			Accumulated Other Comprehensive (Loss) Income
Balance at December 31, 2012	$	136.5		$	—	$	1.4	$	2,207.7		$	(2,073.0	)	$	0.4
Equity-based compensation expense	4.0			—		—		4.0			—			—
Repurchase of common shares	(0.1		)	—		—		—			(0.1		)	—
Accrued charitable contribution related to the MPK Coworker Incentive Plan II, net of tax	(0.6		)	—		—		(0.6		)	—			—
Incentive compensation plan units withheld for taxes	(0.1		)	—		—		(0.1		)	—			—
Net income	75.0			—		—		—			75.0			—
Foreign currency translation adjustment	(5.7		)	—		—		—			—			(5.7		)
Balance at June 30, 2013	$	209.0		$	—	$	1.4	$	2,211.0		$	(1,998.1	)	$	(5.3	)

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

6

CDW CORPORATION AND SUBSIDIARIES CONSOLIDATED STATEMENTS OF CASH FLOWS (in millions) (unaudited)
	Six Months Ended June 30,
	2013			2012
Cash flows from operating activities:
Net income	$	75.0		$	47.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	104.3			105.7
Equity-based compensation expense	4.0			11.5
Deferred income taxes	(23.5		)	(32.0		)
Amortization of deferred financing costs, debt premium, and debt discount, net	5.3			8.0
Net loss on extinguishments of long-term debt	14.2			9.4
Other	—			0.9
Changes in assets and liabilities:
Accounts receivable	(108.9		)	19.8
Merchandise inventory	(64.0		)	0.1
Other assets	(67.2		)	(45.3		)
Accounts payable-trade	253.8			170.5
Other current liabilities	17.8			9.2
Long-term liabilities	(3.7		)	(0.8		)
Net cash provided by operating activities	207.1			304.7
Cash flows from investing activities:
Capital expenditures	(20.0		)	(15.7		)
Net cash used in investing activities	(20.0		)	(15.7		)
Cash flows from financing activities:
Proceeds from borrowings under revolving credit facility	63.0			256.0
Repayments of borrowings under revolving credit facility	(63.0		)	(256.0		)
Repayments of long-term debt	(43.4		)	(201.0		)
Proceeds from issuance of long-term debt	1,346.6			135.7
Payments to extinguish long-term debt	(1,352.6		)	(136.9		)
Payments of debt financing costs	(4.8		)	(2.1		)
Net change in accounts payable-inventory financing	33.3			(25.5		)
Payment of incentive compensation plan withholding taxes	(23.3		)	—
Repurchase of common shares	(0.1		)	(0.3		)
Net cash used in financing activities	(44.3		)	(230.1		)
Effect of exchange rate changes on cash and cash equivalents	(1.4		)	(0.1		)
Net increase in cash and cash equivalents	141.4			58.8
Cash and cash equivalents—beginning of period	37.9			99.9
Cash and cash equivalents—end of period	$	179.3		$	158.7
Supplementary disclosure of cash flow information:
Interest paid	$	(142.7	)	$	(151.4	)
Taxes paid, net	$	(50.9	)	$	(38.4	)

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

7

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

1. Description of Business and Summary of Significant Accounting Policies

Description of Business

CDW is a Fortune 500 company and a leading provider of integrated information technology (“IT”) solutions to small, medium and large business, government, education and healthcare customers in the U.S. and Canada. The Company's offerings range from discrete hardware and software products to integrated IT solutions such as mobility, security, data center optimization, cloud computing, virtualization and collaboration.

Basis of Presentation

The accompanying unaudited interim consolidated financial statements as of June 30, 2013 and for the three and six months ended June 30, 2013 and 2012 ("consolidated financial statements") have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC") for interim financial statements. Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been condensed or omitted pursuant to such rules and regulations. The consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2012 ("December 31, 2012 financial statements"). The significant accounting policies used in preparing these consolidated financial statements were applied on a basis consistent with those reflected in the December 31, 2012 financial statements, except as disclosed in Note 2. 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 shareholders' equity as of the dates and for the periods indicated. The unaudited consolidated statements of operations for such interim periods reported are not necessarily indicative of results for the full year.

CDW Corporation ("Parent") was previously owned directly by CDW Holdings LLC ("CDW Holdings"), a company controlled by investment funds affiliated with Madison Dearborn Partners, LLC ("Madison Dearborn") and Providence Equity Partners, L.L.C. ("Providence Equity," and together with Madison Dearborn, the "Sponsors"), certain other co-investors and certain members of CDW management. On July 2, 2013, Parent completed an initial public offering ("IPO") of its common stock. During June 2013, in connection with the IPO, CDW Holdings distributed all of its shares of Parent's common stock to its members in accordance with their respective membership interests. See Note 13 for additional discussion of Parent's IPO.

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 as described in Note 12 and does not hold any material assets or engage in any business activities or operations.

Throughout these notes, the terms the “Company” and “CDW” refer to Parent and its 100% owned subsidiaries.

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of Parent and its 100% owned subsidiaries. All intercompany transactions and accounts are eliminated in consolidation.

Use of Estimates

The preparation of consolidated financial statements in accordance with GAAP requires management to make use of certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported periods. The Company bases its estimates on historical experience and on various other assumptions that management believes are reasonable under the circumstances, the results of which form the basis for making judgments about carrying values of assets and liabilities that are not readily apparent from other sources. Actual results could differ from those estimates.

The notes to the consolidated financial statements contained in the December 31, 2012 financial statements include an additional discussion of the significant accounting policies and estimates used in the preparation of the Company's

8

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

consolidated financial statements. There have been no material changes to the Company's significant accounting policies and estimates during the six months ended June 30, 2013.

Reclassifications

Certain reclassifications have been made to the prior period consolidated financial statements to conform to the current period presentation.

See Note 6 for a description of the reclassification and split of the Company's common shares that were completed during the second quarter of 2013.

2. Recent Accounting Pronouncements

Disclosure of the Effects of Reclassifications from Accumulated Other Comprehensive Income

In February 2013, the Financial Accounting Standards Board issued Accounting Standards Update 2013-02, which required that the effects of significant reclassifications from accumulated other comprehensive income to net income be shown parenthetically on the face of the consolidated financial statements or disclosed in a note. The adoption of this new guidance on January 1, 2013 did not have an impact on the Company's consolidated financial position, results of operations or cash flows.

3. 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 accompanying consolidated balance sheets. The Company does not incur any interest expense associated with these agreements as balances are paid when they are due.

The following table presents the amounts included in accounts payable-inventory financing:

(in millions)	June 30, 2013		December 31, 2012
Revolving Loan inventory financing agreement	$	280.5	$	248.3
Other inventory financing agreements	2.0		0.9
Accounts payable-inventory financing	$	282.5	$	249.2

The Company maintains a senior secured asset-based revolving credit facility as described in Note 4, which incorporates a $400.0 million floorplan sub-facility to facilitate the purchase of inventory from a certain vendor. In connection with the floorplan sub-facility, the Company maintains an inventory financing agreement on an unsecured basis with a financial intermediary to facilitate the purchase of inventory from this vendor (the “Revolving Loan inventory financing agreement”). Amounts outstanding under the Revolving Loan inventory financing agreement are unsecured and non-interest bearing.

The Company also maintains other inventory financing agreements with financial intermediaries to facilitate the purchase of inventory from certain vendors. At June 30, 2013 and December 31, 2012, amounts owed under other inventory financing agreements of $2.0 million and $0.9 million, respectively, were collateralized by the inventory purchased under these financing agreements and a second lien on the related accounts receivable.

9

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

4. Long-Term Debt

Long-term debt was as follows:

(dollars in millions)	Interest Rate (1)		June 30, 2013			December 31, 2012
Senior secured asset-based revolving credit facility	—	%	$	—		$	—
Senior secured term loan facility	3.5	%	1,346.6			1,339.5
Unamortized discount on senior secured term loan facility			(3.3		)	—
Senior secured notes due 2018	8.0	%	500.0			500.0
Senior notes due 2019	8.5	%	1,305.0			1,305.0
Unamortized premium on senior notes due 2019			4.6			5.0
Senior subordinated notes due 2017	12.535	%	571.5			621.5
Senior notes due 2015	—	%	—			—
Total long-term debt			3,724.4			3,771.0
Less current maturities of long-term debt			(13.5		)	(40.0		)
Long-term debt, excluding current maturities			$	3,710.9		$	3,731.0

(1)Weighted-average interest rate at June 30, 2013.

At June 30, 2013, the Company was in compliance with the covenants under its various credit agreements as described below.

Senior Secured Asset-Based Revolving Credit Facility (“Revolving Loan”)

At June 30, 2013, the Company had no outstanding borrowings under the Revolving Loan, $1.2 million of undrawn letters of credit and $267.4 million reserved related to the floorplan sub-facility. The Revolving Loan matures on June 24, 2016.

In connection with the floorplan sub-facility, the Company maintains a Revolving Loan inventory financing agreement with a financial intermediary. At June 30, 2013, the financial intermediary reported an outstanding balance of $258.6 million under the Revolving Loan inventory financing agreement. The total amount reported on the Company's consolidated balance sheet as accounts payable-inventory financing related to the Revolving Loan inventory financing agreement is $21.9 million more than the $258.6 million owed to the financial intermediary due to differences in the timing of reporting activity under the Revolving Loan inventory financing agreement. The outstanding balance reported by the financial intermediary excludes $8.8 million in reserves for open orders that reduce the availability under the Revolving Loan.

Availability under the Revolving Loan is limited to (a) the lesser of the revolving commitment of $900.0 million and the amount of the borrowing base less (b) outstanding borrowings, letters of credit, and amounts outstanding under the Revolving Loan inventory financing agreement plus a reserve of 15% of open orders. At June 30, 2013, the borrowing base was $1,098.8 million based on the amount of eligible inventory and accounts receivable balances as of May 31, 2013. The Company could have borrowed up to an additional $631.4 million under the Revolving Loan at June 30, 2013.

Senior Secured Term Loan Facility

On April 29, 2013, the Company entered into a new seven-year, $1,350.0 million aggregate principal amount senior secured term loan facility (the "Term Loan"). Substantially all of the proceeds from the Term Loan were used to repay the $1,299.5 million outstanding aggregate principal amount of the prior senior secured term loan facility (the "Prior Term Loan Facility"). In connection with this refinancing, the Company recorded a loss on extinguishment of long-term debt of $10.3 million in the consolidated statement of operations for the three and six months ended June 30, 2013. This loss represented a write-off of the remaining unamortized deferred financing costs related to the Prior Term Loan Facility.

10

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

The Term Loan was issued at a price of 99.75% of par, which resulted in a discount of $3.4 million. This discount is reported on the consolidated balance sheet as a reduction to the face amount of the Term Loan and is being amortized over the term of the related debt. Borrowings under the Term Loan bear interest at either (a) the alternate base rate ("ABR") plus a margin or (b) LIBOR plus a margin; provided that for the purposes of the Term Loan, LIBOR shall not be less than 1.00% per annum at any time. The margin is based upon a net leverage ratio as defined in the agreement governing the Term Loan, ranging from 1.25%-1.50% for ABR borrowings and 2.25%- 2.50% for LIBOR borrowings.

Unlike the Prior Term Loan Facility, the Term Loan does not include a senior secured leverage ratio requirement or a hedging requirement. Additionally, the definition of debt under the Term Loan was revised to exclude amounts outstanding under the Company's inventory financing agreements. The Term Loan is subject to certain requirements as was the Prior Term Loan Facility to make mandatory annual excess cash flow prepayments under designated circumstances, including (i) a prepayment in an amount equal to 50% of the Company's excess cash flow for a fiscal year (the percentage rate of which decreases to 25% when the total net leverage ratio, as defined in the governing agreement, is less than or equal to 5.5 but greater than 4.5; and decreases to 0% when the total net leverage ratio is less than or equal to 4.5), and (ii) the net cash proceeds from the incurrence of certain additional indebtedness by the Company or its subsidiaries. The total net leverage ratio was 4.5 and 4.9 at June 30, 2013 and December 31, 2012, respectively. The total net leverage ratio at December 31, 2012 has been revised to conform to the definition in the agreement governing the Term Loan.

The Company is required to pay quarterly principal installments equal to $3.375 million, with the remaining principal amount payable on the maturity date of April 29, 2020. The quarterly principal installment payments commenced during the quarter ended June 30, 2013. At June 30, 2013, the outstanding principal amount of the Term Loan was $1,346.6 million, excluding $3.3 million in unamortized discount.

The Company has ten interest rate cap agreements in effect through January 14, 2015 with a combined notional amount of $1,150.0 million. These cap agreements have not been designated as cash flow hedges of interest rate risk for GAAP accounting purposes. Of the total $1,150.0 million notional amount, $500.0 million entitle the Company to payments from the counterparty of the amount, if any, by which three-month LIBOR exceeds 3.5% during the agreement period. The remaining cap agreements with a notional amount of $650.0 million entitle the Company to payments from the counterparty of the amount, if any, by which the three-month LIBOR exceeds 1.5% during the agreement period. The fair value of the Company's interest rate cap agreements was $0.2 million at June 30, 2013 and $0.1 million at December 31, 2012.

On January 30, 2013, the Company made an optional prepayment of $40.0 million aggregate principal amount outstanding under the Prior Term Loan Facility. The optional prepayment satisfied the excess cash flow payment provision of the Prior Term Loan Facility with respect to the year ended December 31, 2012.

See Note 13 for a description of the incremental borrowings under the Term Loan completed during the third quarter of 2013.

8.0% Senior Secured Notes due 2018 (“Senior Secured Notes”)

The Senior Secured Notes were issued on December 17, 2010 and mature on December 15, 2018. At June 30, 2013, the outstanding principal amount of the Senior Secured Notes was $500.0 million.

See Note 13 for a description of the partial redemption of Senior Secured Notes completed during the third quarter of 2013.

11.0% Senior Exchange Notes due 2015 (“Senior Exchange Notes”); 11.5% / 12.25% Senior PIK Election Exchange Notes due 2015 (“PIK Election Notes” together with the Senior Exchange Notes, the “Senior Notes due 2015”)

At June 30, 2013 and December 31, 2012, there were no outstanding Senior Notes due 2015.

In February and March 2012, the Company purchased or redeemed the remaining $129.0 million aggregate principal amount of Senior Notes due 2015, funded with the issuance of $130.0 million aggregate principal amount of additional Senior Notes (as defined below). In connection with these transactions, the Company recorded a loss on extinguishment of long-term debt of $9.4 million in the Company's consolidated statement of operations for the six months ended June 30, 2012. This loss represented $7.9 million in tender and redemption premiums and $1.5 million for the write-off of the remaining unamortized deferred financing costs related to the Senior Notes due 2015.

11

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

8.5% Senior Notes due 2019 (“Senior Notes”)

On February 17, 2012, the Company issued $130.0 million aggregate principal amount of additional Senior Notes at an issue price of 104.375% of par. The $5.7 million premium received is reported on the consolidated balance sheets as an addition to the face amount of the Senior Notes and is being amortized as a reduction to interest expense over the term of the related debt. At June 30, 2013, the outstanding principal amount of Senior Notes was $1,305.0 million, excluding $4.6 million in unamortized premium. The Senior Notes mature on April 1, 2019.

12.535% Senior Subordinated Exchange Notes due 2017 (“Senior Subordinated Notes”)

At June 30, 2013, the outstanding principal amount of the Company's Senior Subordinated Notes was $571.5 million. The Senior Subordinated Notes mature on October 12, 2017.

On March 8, 2013, the Company redeemed $50.0 million aggregate principal amount of Senior Subordinated Notes at a redemption price that was 106.268% of the principal amount redeemed. Cash on hand was used to fund the redemption of $50.0 million aggregate principal amount, $3.1 million of redemption premium and $2.5 million in accrued and unpaid interest. In connection with this redemption, the Company recorded a loss on extinguishment of long-term debt of $3.9 million in the Company's consolidated statement of operations for the six months ended June 30, 2013. This loss represented $3.1 million in redemption premium and $0.8 million for the write-off of a portion of the unamortized deferred financing costs related to the Senior Subordinated Notes.

See Note 13 for a description of the partial redemption of Senior Subordinated Notes completed during the third quarter of 2013.

Fair Value

The fair value of the Company's long-term debt instruments at June 30, 2013 was $3,899.9 million. The fair value of the Senior Secured Notes, Senior Notes and Senior Subordinated Notes is estimated using quoted market prices for identical assets or liabilities that are traded in over-the-counter secondary markets that are not considered active. The fair value of the Term Loan is estimated using dealer quotes for identical assets or liabilities in markets that are not considered active. Consequently, the Company's long-term debt is classified as Level 2 within the fair value hierarchy.

At June 30, 2013, the carrying value of the Company's long-term debt was $3,723.1 million, excluding $4.6 million in unamortized premium and $3.3 million in unamortized discount.

5. Income Taxes

The Company's effective income tax rate was 36.2% and 38.4% for the three months ended June 30, 2013 and 2012, respectively, and 36.3% and 36.2% for the six months ended June 30, 2013 and 2012, respectively.  

For the three months ended June 30, 2013, the Company's effective tax rate differed from the U.S. federal statutory rate primarily due to state income taxes. The effective tax rate for the three months ended June 30, 2012 differed from the U.S. federal statutory rate primarily due to state income taxes and non-deductible expenses, primarily equity-based compensation and meals and entertainment. The non-deductible expenses had a greater impact on the effective tax rate for the three months ended June 30, 2012 than for the three months ended June 30, 2013.

For the six months ended June 30, 2013, the Company's effective tax rate differed from the U.S. federal statutory rate primarily due to state income taxes. The effective tax rate for the six months ended June 30, 2012 also differed from the U.S. federal statutory rate primarily due to state income taxes. While the non-deductible expenses had a greater impact on the effective tax rate for the six months ended June 30, 2012 than for the six months ended June 30, 2013, the effect was offset by additional state tax credits that were recorded in the first three months of 2012.

In the ordinary course of business, the Company is subject to review by domestic and foreign taxing authorities, including the Internal Revenue Service (“IRS”). In general, the Company is no longer subject to audit by the IRS for tax years through 2010 and state, local or foreign taxing authorities for tax years through 2007. Various taxing authorities are in the process of auditing income tax returns of the Company and its subsidiaries. The Company does not anticipate that any adjustments from the audits would have a material impact on its consolidated financial position, results of operations or cash flows.

12

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

6. Shareholders' Equity

In June 2013, the Company’s Board of Directors and the Company's sole shareholder at that time, CDW Holdings, approved the reclassification of the Company’s Class A common shares and Class B common shares into a single class of common shares and a 143.0299613-for-1 stock split, effective immediately. The par value of the common shares was maintained at $0.01 per share. All references to common shares and per share amounts in the accompanying consolidated financial statements have been adjusted to reflect the reclassification and stock split on a retroactive basis.

In June 2013, the Company amended and restated its certificate of incorporation to authorize the issuance of 100,000,000 shares of preferred stock with a par value of $0.01. No shares of preferred stock have been issued or are outstanding as of June 30, 2013. Additionally, the amended and restated certificate of incorporation increased the number of authorized common shares to 1,000,000,000.

On July 2, 2013, the Company completed an IPO of its common shares. See Note 13 for additional discussion of the Company's IPO.

7. Equity-Based Compensation

The Company recognized $2.1 million and $5.8 million in equity-based compensation expense for the three months ended June 30, 2013 and 2012, respectively, and $4.0 million and $11.5 million in equity-based compensation expense for the six months ended June 30, 2013 and 2012, respectively. Equity-based compensation expense for the three and six months ended June 30, 2012 included incremental expense of $1.7 million and $3.3 million, respectively, related to a modified Class B Common Unit grant agreement with the Company's former chief executive officer.

In June 2013, the Company adopted the 2013 Long-Term Incentive Plan (the "2013 LTIP"). The 2013 LTIP provides for the grant of incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock, restricted stock units, bonus stock and performance awards. The maximum aggregate number of shares that may be issued under the 2013 LTIP is 11,700,000 shares of the Company's common stock, in addition to the 3,798,508 shares of restricted stock granted to replace unvested B Units in connection with the Company's IPO, as discussed below.

On July 2, 2013, the Company completed an IPO of its common shares. In connection with the IPO, CDW Holdings distributed all of its shares of the Company's common stock to its existing members in accordance with their respective membership interests. Common stock received by holders of B Units in connection with the distribution is subject to any vesting provisions previously applicable to the holder's B Units. B Unit holders received 3,798,508 shares of restricted stock with respect to B Units that had not yet vested at the time of the distribution. In addition, the Company issued approximately 1.3 million stock options to the B Unit holders to preserve their fully-diluted equity ownership percentage. These options were issued with an exercise price equal to the IPO price per share and are also subject to the same vesting provisions as the B Units to which they relate. The unvested stock options and shares of restricted stock generally vest between December 31, 2014 and January 20, 2018.

Under the terms of the MPK Incentive Plan II (the "MPK Plan"), vesting accelerated for all unvested units upon completion of the IPO. The Company anticipates recording a pre-tax charge of $36.7 million related to the acceleration of the expense recognition for MPK units in the third quarter of 2013. In connection with the completion of the IPO, the Company distributed common stock to each participant and withheld the number of shares of common stock equal to the required tax withholding for each participant. In June 2013, the Company paid required withholding taxes of $23.3 million to federal and state taxing authorities. This amount is included within prepaid expenses and other on the consolidated balance sheet at June 30, 2013 and is reported as a financing activity in the consolidated statement of cash flows for the six months ended June 30, 2013. In addition, the Company paid $4.0 million of employer payroll taxes that are included as an operating activity in the consolidated statement of cash flows for the six months ended June 30, 2013.

In connection with the IPO, the Company granted approximately 1.4 million restricted stock units under the 2013 LTIP. The restricted stock units granted vest at the end of four years.

See Note 13 for additional discussion of the Company's IPO.

13

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

8. 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 number of common shares outstanding during the period. The dilutive effect of outstanding MPK Plan Units and Deferred Units is reflected in the denominator for diluted earnings per share using the treasury stock method. Class B Common Units are not dilutive as no incremental common shares are issued upon vesting or repurchase by the Company.

The following is a reconciliation of basic shares to diluted shares:

	Three Months Ended June 30,		Six Months Ended June 30,
(in millions)	2013	2012	2013	2012
Weighted-average shares - basic	145.3	145.1	145.2	145.0
Effect of dilutive securities	1.4	0.7	1.3	0.8
Weighted-average shares - diluted	146.7	145.8	146.5	145.8

There were no potential common shares excluded from diluted earnings per share for the three and six month periods ended June 30, 2013 and 2012.

On July 2, 2013, the Company completed an IPO of its common shares which will impact both basic and diluted earnings per share in future periods. See Note 13 for additional discussion of the Company's IPO.

9. Deferred Compensation Plan

On March 10, 2010, in connection with the Company's purchase of $28.5 million principal amount of its outstanding senior subordinated debt, the Company established the Restricted Debt Unit Plan (the “RDU Plan”), an unfunded nonqualified deferred compensation plan. The total number of RDUs that can be granted under the RDU Plan is 28,500. As of June 30, 2013, 26,549 RDUs were outstanding. RDUs that are outstanding vest daily on a pro rata basis over the three-year period from January 1, 2012 (or, if later, the date of hire or the date of a subsequent RDU grant) through December 31, 2014. 

The total amount of compensation available to be paid under the RDU Plan is based on two components, a principal component and an interest component. Participants have no rights to the underlying debt. The principal component credits the RDU Plan with an amount equal to the $28.5 million face value of the Company's Senior Subordinated Notes (the “Debt Pool”). Payment of the principal component of the RDU Plan is expected to be made on October 12, 2017, unless accelerated due to a sale of the Company. By December 31, 2014, amounts accrued under the RDU Plan are expected to equal the present value of the principal component, plus any accrued unpaid interest thereon. The interest component credits the RDU Plan with amounts equal to the interest that would have been earned on the Debt Pool from March 10, 2010 through maturity on October 12, 2017 as discussed below. Interest amounts for 2010 and 2011 were deferred until 2012, and thereafter, interest amounts were paid to participants semi-annually on the interest payment due dates. Payments totaling $1.7 million were made to participants under the RDU Plan in April 2013 in connection with the semi-annual interest payment due.

As described in Note 13, the Company used a portion of the IPO proceeds together with incremental borrowings to redeem $324.0 million of the total Senior Subordinated Notes outstanding on August 1, 2013. In accordance with the terms of the RDU Plan, upon redemption of Senior Subordinated Notes, the RDUs cease to accrue the related interest component credits. The Company expects to give participants the opportunity to share on a pro rata basis in cash retention pools that will be payable to participants who satisfy certain retention requirements. The aggregate amount of the retention pools will be determined based on the amount of interest component credits that would have been allocated to the RDU Plan if the Senior Subordinated Notes remained outstanding through maturity. The Company expects to record a pre-tax charge of $7.5 million in the third quarter of 2013 for payment of the first cash retention pool. Including this charge, unrecognized compensation expense as of June 30, 2013 of approximately $21 million is expected to be recognized through 2014 and approximately $7 million in 2015 through 2017. Payments under the

14

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

RDU Plan may be impacted if certain significant events occur or circumstances change that would impact the financial condition or structure of the Company.

Compensation expense of $2.2 million and $2.1 million related to the RDU Plan was recognized for the three months ended June 30, 2013 and 2012, respectively, and $4.3 million and $4.2 million for the six months ended June 30, 2013 and 2012, respectively. At June 30, 2013 and December 31, 2012, the Company had $18.1 million and $15.5 million of liabilities related to the RDU Plan recorded on the consolidated balance sheets, respectively.

10. 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 and local authorities, by various partners and large 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 U.S. bankruptcy laws. 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 June 30, 2013, 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 financial condition and results of operations could be adversely affected in any particular period by the unfavorable resolution of one or more of these proceedings or matters.

11. Segment Information

Segment information is presented in accordance with a “management approach,” which designates the internal reporting used by the chief operating decision-maker for making decisions and assessing performance as the source of the Company's reportable segments. The Company's segments are organized in a manner consistent with which separate financial information is available and evaluated regularly by the chief operating decision-maker in deciding how to allocate resources and in assessing performance.

The Company has two reportable segments: Corporate, which is comprised primarily of private sector business customers, and Public, which is comprised of government agencies and education and healthcare institutions. The Company also has two other operating segments, CDW Advanced Services and Canada, which do not meet the reportable segment quantitative thresholds and, accordingly, are combined together as “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 both the Corporate and Public segments. As a result, costs and intercompany charges associated with the logistics function are fully allocated to both of these segments based on a percent of 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. Depreciation expense is included in Headquarters as it is not allocated among segments or used in measuring segment performance.

The Company allocates resources to and evaluates performance of its segments based on net sales, income (loss) from operations and Adjusted EBITDA, a non-GAAP measure as defined in the Company's credit agreements. However, the Company has concluded that income (loss) from operations is the more useful measure in terms of discussion of operating results, as it is a GAAP measure.

Segment information for total assets and capital expenditures is not presented as such information is not used in measuring segment performance or allocating resources between segments.

15

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Selected Segment Financial Information

The following table presents information about the Company’s segments for the three and six months ended June 30, 2013 and 2012:

(in millions)	Corporate			Public			Other			Headquarters			Total
Three Months Ended June 30, 2013:
Net sales	$	1,537.4		$	1,082.6		$	159.3		$	—		$	2,779.3
Income (loss) from operations	103.2			69.1			8.9			(27.6		)	153.6
Depreciation and amortization expense	(24.4		)	(11.0		)	(2.2		)	(14.7		)	(52.3		)
Three Months Ended June 30, 2012:
Net sales	$	1,394.4		$	1,040.4		$	149.9		$	—		$	2,584.7
Income (loss) from operations	92.3			66.1			5.0			(27.0		)	136.4
Depreciation and amortization expense	(24.4		)	(11.0		)	(2.4		)	(15.4		)	(53.2		)
Six Months Ended June 30, 2013:
Net sales	$	2,941.3		$	1,929.4		$	320.3		$	—		$	5,191.0
Income (loss) from operations	197.3			114.7			14.9			(53.2		)	273.7
Depreciation and amortization expense	(48.8		)	(22.1		)	(4.5		)	(28.9		)	(104.3		)
Six Months Ended June 30, 2012:
Net sales	$	2,757.2		$	1,858.0		$	288.7		$	—		$	4,903.9
Income (loss) from operations	177.1			108.2			7.5			(52.8		)	240.0
Depreciation and amortization expense	(48.7		)	(22.0		)	(4.7		)	(30.3		)	(105.7		)

16

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

12. Supplemental Guarantor Information

The Senior Secured Notes, Senior Notes and Senior Subordinated Notes are guaranteed by Parent and each of CDW LLC’s direct and indirect, 100% owned, domestic subsidiaries (the “Guarantor Subsidiaries”). All guarantees by Parent and Guarantor Subsidiaries are joint and several, and full and unconditional; provided that each guarantee by the Guarantor Subsidiaries is subject to certain customary release provisions contained in the indentures governing the Senior Secured Notes, Senior Notes and Senior Subordinated Notes. CDW LLC's Canada subsidiary (the “Non-Guarantor Subsidiary”) does not guarantee the debt obligations. CDW LLC and CDW Finance Corporation, as co-issuers, are 100% owned by Parent, and each of the Guarantor Subsidiaries and the Non-Guarantor Subsidiary is 100% owned by CDW LLC.

The following tables set forth condensed consolidating balance sheets as of June 30, 2013 and December 31, 2012, consolidating statements of operations for the three and six months ended June 30, 2013 and 2012, condensed consolidating statements of comprehensive income for the three and six months ended June 30, 2013 and 2012, and condensed consolidating statements of cash flows for the six months ended June 30, 2013 and 2012, in accordance with Rule 3-10 of Regulation S-X. The consolidating financial information includes the accounts of CDW Corporation (the “Parent Guarantor”), which has no independent assets or operations, the accounts of CDW LLC (the “Subsidiary Issuer”), the combined accounts of the Guarantor Subsidiaries, the accounts of the Non-Guarantor Subsidiary, and the accounts of CDW Finance Corporation (the “Co-Issuer”) for the periods indicated. The information was prepared on the same basis as the Company’s consolidated financial statements.

17

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Condensed Consolidating Balance Sheet
June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Assets
Current assets:
Cash and cash equivalents	$	—	$	142.0	$	11.2	$	26.2		$	—	$	(0.1	)	$	179.3
Accounts receivable, net	—		—		1,335.2		55.3			—		—			1,390.5
Merchandise inventory	—		—		376.2		2.3			—		—			378.5
Miscellaneous receivables	—		55.4		103.3		6.4			—		—			165.1
Deferred income taxes	—		8.5		3.7		(0.1		)	—		—			12.1
Prepaid expenses and other	—		24.0		83.6		0.6			—		—			108.2
Total current assets	—		229.9		1,913.2		90.7			—		(0.1		)	2,233.7
Property and equipment, net	—		69.4		61.1		2.2			—		—			132.7
Goodwill	—		749.4		1,428.5		29.5			—		—			2,207.4
Other intangible assets, net	—		343.9		1,052.5		7.3			—		—			1,403.7
Deferred financing costs, net	—		41.4		—		—			—		—			41.4
Other assets	5.2		1.5		0.1		0.6			—		(5.8		)	1.6
Investment from and advances to subsidiaries	203.8		2,892.0		—		—			—		(3,095.8		)	—
Total assets	$	209.0	$	4,327.5	$	4,455.4	$	130.3		$	—	$	(3,101.7	)	$	6,020.5
Liabilities and Shareholders’ Equity
Current liabilities:
Accounts payable—trade	$	—	$	20.6	$	725.2	$	25.3		$	—	$	(0.1	)	$	771.0
Accounts payable—inventory financing	—		—		282.5		—			—		—			282.5
Current maturities of long-term debt	—		13.5		—		—			—		—			13.5
Deferred revenue	—		—		96.5		0.4			—		—			96.9
Accrued expenses	—		136.4		138.9		6.0			—		—			281.3
Total current liabilities	—		170.5		1,243.1		31.7			—		(0.1		)	1,445.2
Long-term liabilities:
Debt	—		3,710.9		—		—			—		—			3,710.9
Deferred income taxes	—		189.8		412.1		1.6			—		(5.2		)	598.3
Accrued interest	—		6.4		—		—			—		—			6.4
Other liabilities	—		46.1		3.6		1.6			—		(0.6		)	50.7
Total long-term liabilities	—		3,953.2		415.7		3.2			—		(5.8		)	4,366.3
Total shareholders’ equity	209.0		203.8		2,796.6		95.4			—		(3,095.8		)	209.0
Total liabilities and shareholders’ equity	$	209.0	$	4,327.5	$	4,455.4	$	130.3		$	—	$	(3,101.7	)	$	6,020.5

18

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Condensed Consolidating Balance Sheet
December 31, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Assets
Current assets:
Cash and cash equivalents	$	—	$	48.0	$	—	$	9.8		$	—	$	(19.9	)	$	37.9
Accounts receivable, net	—		—		1,217.7		67.3			—		—			1,285.0
Merchandise inventory	—		—		313.2		1.4			—		—			314.6
Miscellaneous receivables	—		61.7		82.0		4.8			—		—			148.5
Deferred income taxes	—		8.7		5.5		(0.1		)	—		—			14.1
Prepaid expenses and other	—		10.1		24.4		0.1			—		—			34.6
Total current assets	—		128.5		1,642.8		83.3			—		(19.9		)	1,834.7
Property and equipment, net	—		73.9		66.2		2.6			—		—			142.7
Goodwill	—		749.4		1,428.5		31.4			—		—			2,209.3
Other intangible assets, net	—		348.6		1,121.7		8.2			—		—			1,478.5
Deferred financing costs, net	—		53.2		—		—			—		—			53.2
Other assets	5.4		1.1		0.4		0.6			—		(5.9		)	1.6
Investment in and advances to subsidiaries	131.1		2,946.0		—		—			—		(3,077.1		)	—
Total assets	$	136.5	$	4,300.7	$	4,259.6	$	126.1		$	—	$	(3,102.9	)	$	5,720.0
Liabilities and Shareholders’ Equity
Current liabilities:
Accounts payable—trade	$	—	$	16.5	$	500.3	$	21.7		$	—	$	(19.9	)	$	518.6
Accounts payable—inventory financing	—		—		249.2		—			—		—			249.2
Current maturities of long-term debt	—		40.0		—		—			—		—			40.0
Deferred revenue	—		—		57.8		—			—		—			57.8
Accrued expenses	—		139.3		157.4		5.9			—		—			302.6
Total current liabilities	—		195.8		964.7		27.6			—		(19.9		)	1,168.2
Long-term liabilities:
Debt	—		3,731.0		—		—			—		—			3,731.0
Deferred income taxes	—		188.1		440.0		1.7			—		(5.5		)	624.3
Accrued interest	—		8.0		—		—			—		—			8.0
Other liabilities	—		46.7		4.0		1.7			—		(0.4		)	52.0
Total long-term liabilities	—		3,973.8		444.0		3.4			—		(5.9		)	4,415.3
Total shareholders’ equity	136.5		131.1		2,850.9		95.1			—		(3,077.1		)	136.5
Total liabilities and shareholders' equity	$	136.5	$	4,300.7	$	4,259.6	$	126.1		$	—	$	(3,102.9	)	$	5,720.0

19

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Consolidating Statement of Operations
Three Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net sales	$	—	$	—		$	2,662.0		$	117.3		$	—	$	—		$	2,779.3
Cost of sales	—		—			2,225.4			102.3			—		—			2,327.7
Gross profit	—		—			436.6			15.0			—		—			451.6
Selling and administrative expenses	—		27.6			230.1			8.7			—		—			266.4
Advertising expense	—		—			30.6			1.0			—		—			31.6
(Loss) income from operations	—		(27.6		)	175.9			5.3			—		—			153.6
Interest (expense) income, net	—		(70.4		)	—			0.1			—		—			(70.3		)
Net loss on extinguishments of long-term debt	—		(10.3		)	—			—			—		—			(10.3		)
Management fee	—		1.6			—			(1.6		)	—		—			—
Other (expense) income, net	—		(0.2		)	0.3			0.1			—		—			0.2
(Loss) income before income taxes	—		(106.9		)	176.2			3.9			—		—			73.2
Income tax benefit (expense)	—		39.8			(65.6		)	(0.7		)	—		—			(26.5		)
(Loss) income before equity in earnings of subsidiaries	—		(67.1		)	110.6			3.2			—		—			46.7
Equity in earnings of subsidiaries	46.7		113.8			—			—			—		(160.5		)	—
Net income	$	46.7	$	46.7		$	110.6		$	3.2		$	—	$	(160.5	)	$	46.7

20

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Consolidating Statement of Operations
Three Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net sales	$	—	$	—		$	2,471.9		$	112.8		$	—	$	—		$	2,584.7
Cost of sales	—		—			2,059.2			98.6			—		—			2,157.8
Gross profit	—		—			412.7			14.2			—		—			426.9
Selling and administrative expenses	—		27.0			224.1			8.4			—		—			259.5
Advertising expense	—		—			29.9			1.1			—		—			31.0
(Loss) income from operations	—		(27.0		)	158.7			4.7			—		—			136.4
Interest expense, net	—		(76.9		)	—			—			—		—			(76.9		)
Net loss on extinguishments of long-term debt	—		—			—			—			—		—			—
Management fee	—		0.8			—			(0.8		)	—		—			—
Other income, net	—		0.2			—			—			—		—			0.2
(Loss) income before income taxes	—		(102.9		)	158.7			3.9			—		—			59.7
Income tax benefit (expense)	—		41.0			(62.9		)	(1.0		)	—		—			(22.9		)
(Loss) income before equity in earnings of subsidiaries	—		(61.9		)	95.8			2.9			—		—			36.8
Equity in earnings of subsidiaries	36.8		98.7			—			—			—		(135.5		)	—
Net income	$	36.8	$	36.8		$	95.8		$	2.9		$	—	$	(135.5	)	$	36.8

21

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Consolidating Statement of Operations
Six Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net sales	$	—	$	—		$	4,951.8		$	239.2		$	—	$	—		$	5,191.0
Cost of sales	—		—			4,127.5			209.9			—		—			4,337.4
Gross profit	—		—			824.3			29.3			—		—			853.6
Selling and administrative expenses	—		53.3			446.8			17.8			—		—			517.9
Advertising expense	—		—			60.2			1.8			—		—			62.0
(Loss) income from operations	—		(53.3		)	317.3			9.7			—		—			273.7
Interest (expense) income, net	—		(142.6		)	—			0.2			—		—			(142.4		)
Net loss on extinguishments of long-term debt	—		(14.2		)	—			—			—		—			(14.2		)
Management fee	—		2.5			—			(2.5		)	—		—			—
Other (expense) income, net	—		(0.2		)	0.6			0.2			—		—			0.6
(Loss) income before income taxes	—		(207.8		)	317.9			7.6			—		—			117.7
Income tax benefit (expense)	—		77.5			(118.6		)	(1.6		)	—		—			(42.7		)
(Loss) income before equity in earnings of subsidiaries	—		(130.3		)	199.3			6.0			—		—			75.0
Equity in earnings of subsidiaries	75.0		205.3			—			—			—		(280.3		)	—
Net income	$	75.0	$	75.0		$	199.3		$	6.0		$	—	$	(280.3	)	$	75.0

22

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Consolidating Statement of Operations
Six Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net sales	$	—	$	—		$	4,684.9		$	219.0		$	—	$	—		$	4,903.9
Cost of sales	—		—			3,901.2			191.2			—		—			4,092.4
Gross profit	—		—			783.7			27.8			—		—			811.5
Selling and administrative expenses	—		52.8			441.3			17.0			—		—			511.1
Advertising expense	—		—			58.5			1.9			—		—			60.4
(Loss) income from operations	—		(52.8		)	283.9			8.9			—		—			240.0
Interest (expense) income, net	—		(156.1		)	0.3			—			—		—			(155.8		)
Net loss on extinguishments of long-term debt	—		(9.4		)	—			—			—		—			(9.4		)
Management fee	—		2.2			—			(2.2		)	—		—			—
Other (expense) income, net	—		(0.1		)	0.1			—			—		—			—
(Loss) income before income taxes	—		(216.2		)	284.3			6.7			—		—			74.8
Income tax benefit (expense)	—		89.8			(115.1		)	(1.8		)	—		—			(27.1		)
(Loss) income before equity in earnings of subsidiaries	—		(126.4		)	169.2			4.9			—		—			47.7
Equity in earnings of subsidiaries	47.7		174.1			—			—			—		(221.8		)	—
Net income	$	47.7	$	47.7		$	169.2		$	4.9		$	—	$	(221.8	)	$	47.7

23

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Condensed Consolidating Statement of Comprehensive Income
Three Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Comprehensive income (loss)	$	43.4	$	43.4	$	110.6	$	(0.1	)	$	—	$	(153.9	)	$	43.4

24

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Condensed Consolidating Statement of Comprehensive Income
Three Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary		Co-Issuer		Consolidating Adjustments			Consolidated
Comprehensive income	$	35.2	$	35.2	$	95.8	$	1.3	$	—	$	(132.3	)	$	35.2

25

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Condensed Consolidating Statement of Comprehensive Income
Six Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary		Co-Issuer		Consolidating Adjustments			Consolidated
Comprehensive income	$	69.3	$	69.3	$	199.3	$	0.3	$	—	$	(268.9	)	$	69.3

26

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Condensed Consolidating Statement of Comprehensive Income
Six Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary		Co-Issuer		Consolidating Adjustments			Consolidated
Comprehensive income	$	48.0	$	48.0	$	169.2	$	5.2	$	—	$	(222.4	)	$	48.0

27

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Condensed Consolidating Statement of Cash Flows
Six Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net cash (used in) provided by operating activities	$	—	$	(109.5	)	$	279.1		$	17.7		$	—	$	19.8		$	207.1
Cash flows from investing activities:
Capital expenditures	—		(18.0		)	(2.0		)	—			—		—			(20.0		)
Net cash used in investing activities	—		(18.0		)	(2.0		)	—			—		—			(20.0		)
Cash flows from financing activities:
Proceeds from borrowings under revolving credit facility	—		63.0			—			—			—		—			63.0
Repayments of borrowings under revolving credit facility	—		(63.0		)	—			—			—		—			(63.0		)
Repayments of long-term debt	—		(43.4		)	—			—			—		—			(43.4		)
Proceeds from issuance of long-term debt	—		1,346.6			—			—			—		—			1,346.6
Payments to extinguish long-term debt	—		(1,352.6		)	—			—			—		—			(1,352.6		)
Net change in accounts payable-inventory financing	—		—			33.3			—			—		—			33.3
Payment of incentive compensation plan withholding taxes	—		(3.8		)	(19.5		)	—			—		—			(23.3		)
Advances from (to) affiliates	—		279.6			(279.7		)	0.1			—		—			—
Other financing activities	—		(4.9		)	—			—			—		—			(4.9		)
Net cash provided by (used in) financing activities	—		221.5			(265.9		)	0.1			—		—			(44.3		)
Effect of exchange rate changes on cash and cash equivalents	—		—			—			(1.4		)	—		—			(1.4		)
Net increase in cash and cash equivalents	—		94.0			11.2			16.4			—		19.8			141.4
Cash and cash equivalents—beginning of period	—		48.0			—			9.8			—		(19.9		)	37.9
Cash and cash equivalents—end of period	$	—	$	142.0		$	11.2		$	26.2		$	—	$	(0.1	)	$	179.3

28

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

Condensed Consolidating Statement of Cash Flows
Six Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net cash (used in) provided by operating activities	$	—	$	(118.3	)	$	410.6		$	13.1		$	—	$	(0.7	)	$	304.7
Cash flows from investing activities:
Capital expenditures	—		(8.8		)	(6.5		)	(0.4		)	—		—			(15.7		)
Net cash used in investing activities	—		(8.8		)	(6.5		)	(0.4		)	—		—			(15.7		)
Cash flows from financing activities:
Proceeds from borrowings under revolving credit facility	—		256.0			—			—			—		—			256.0
Repayments of borrowings under revolving credit facility	—		(256.0		)	—			—			—		—			(256.0		)
Repayments of long-term debt	—		(201.0		)	—			—			—		—			(201.0		)
Proceeds from issuance of long-term debt	—		135.7			—			—			—		—			135.7
Payments to extinguish long-term debt	—		(136.9		)	—			—			—		—			(136.9		)
Net change in accounts payable-inventory financing	—		—			(25.5		)	—			—		—			(25.5		)
Advances from (to) affiliates	—		371.8			(372.3		)	0.5			—		—			—
Other financing activities	—		(2.4		)	—			—			—		—			(2.4		)
Net cash provided by (used in) financing activities	—		167.2			(397.8		)	0.5			—		—			(230.1		)
Effect of exchange rate changes on cash and cash equivalents	—		—			—			(0.1		)	—		—			(0.1		)
Net increase in cash and cash equivalents	—		40.1			6.3			13.1			—		(0.7		)	58.8
Cash and cash equivalents—beginning of period	—		102.1			15.8			8.1			—		(26.1		)	99.9
Cash and cash equivalents—end of period	$	—	$	142.2		$	22.1		$	21.2		$	—	$	(26.8	)	$	158.7

29

CDW CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

13. Subsequent Events

On July 2, 2013, the Company completed an IPO of 23,250,000 shares of common stock. On July 31, 2013, the Company completed the sale of an additional 3,487,500 shares of common stock to the underwriters of the IPO pursuant to the underwriters' July 26, 2013 exercise in full of the overallotment option granted to them in connection with the IPO. Such shares were registered under the Securities Act of 1933, as amended, pursuant to the Company's Registration Statement on Form S-1, which was declared effective by the SEC on June 26, 2013. The common shares are listed on the NASDAQ Global Select Market under the symbol “CDW.” The Company's common shares were sold to the underwriters at a price of $17.00 per share in the IPO and upon the exercise of the overallotment option, which generated aggregate net proceeds of approximately $429.5 million to the Company after deducting underwriting discounts, before expenses and transaction costs.

Using a portion of the net proceeds from the IPO, the Company paid a $24.4 million termination fee to affiliates of the Sponsors in connection with the termination of the management services agreement with such entities that was effective upon completion of the IPO and redeemed $175.0 million aggregate principal amount of Senior Secured Notes. The redemption price of the Senior Secured Notes was 108.000% of the principal amount redeemed, plus $0.7 million of accrued and unpaid interest to the date of redemption. The Company used cash on hand to pay such accrued and unpaid interest. Following this redemption, $325.0 million aggregate principal amount of the Senior Secured Notes remain outstanding. In connection with this redemption, the Company expects to record a loss on extinguishment of long-term debt of $16.7 million in the consolidated statement of operations during the third quarter of 2013. This loss represents $14.0 million in redemption premium and $2.7 million for the write-off of a portion of the remaining deferred financing costs related to the Senior Secured Notes.

On August 1, 2013, the Company redeemed $324.0 million aggregate principal amount of Senior Subordinated Notes. The Company used a portion of the net proceeds from the IPO to redeem $146.0 million aggregate principal amount of Senior Subordinated Notes and incremental borrowings of $190.0 million under the Term Loan to redeem $178.0 million aggregate principal amount of Senior Subordinated Notes. The redemption price of the Senior Subordinated Notes was 106.268% of the principal amount redeemed, plus $12.0 million of accrued and unpaid interest to the date of redemption. The Company used cash on hand to pay such accrued and unpaid interest. Following this redemption, $247.5 million aggregate principal amount of the Senior Subordinated Notes remain outstanding. In connection with this redemption, the Company expects to record a loss on extinguishment of long-term debt of $24.7 million in the consolidated statement of operations during the third quarter of 2013. This loss represents $20.3 million in redemption premium and $4.4 million for the write-off of a portion of the remaining deferred financing costs related to the Senior Subordinated Notes.

The Company previously filed a claim as part of a class action settlement in a case alleging price fixing during the period of January 1, 1996 through December 31, 2006, by certain manufacturers of thin-film liquid crystal display panels. On July 13, 2013, the United Stated District Court for the Northern District of California approved distribution of the settlement proceeds, including a net payment to the Company of approximately $10.5 million after fees and expenses. The first of two settlement payments was received by the Company on July 29, 2013 in the amount of $8.5 million. The balance is expected to be received by year-end 2013.

30

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

Unless otherwise indicated or the context otherwise requires, as used in this “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” the terms “we,” “us,” “the Company,” “our,” “CDW” and similar terms refer to CDW Corporation and its subsidiaries. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” should be read in conjunction with the unaudited interim consolidated financial statements and the related notes included elsewhere in this report and with the audited consolidated financial statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012. This discussion contains forward-looking statements that are subject to numerous risks and uncertainties. Actual results may differ materially from those contained in any forward-looking statements. See “Forward-Looking Statements” at the end of this discussion.

Overview

CDW is a Fortune 500 company and a leading provider of integrated information technology ("IT") solutions in the U.S. and Canada. We help our customer base of more than 250,000 small, medium and large business, government, education and healthcare customers by delivering critical solutions to their increasingly complex IT needs. Our broad array of offerings range from discrete hardware and software products to integrated IT solutions such as mobility, security, data center optimization, cloud computing, virtualization and collaboration. We are technology “agnostic,” with a product portfolio that includes more than 100,000 products from more than 1,000 brands. We provide our products and solutions through sales force and service delivery teams consisting of more than 4,300 coworkers, including over 1,700 field sellers, highly-skilled technology specialists and advanced service delivery engineers.

We are a leading U.S. sales channel partner for many original equipment manufacturers ("OEMs") and software publishers (collectively, our "vendor partners"), whose products we sell or include in the solutions we offer. We believe we are an important extension of our vendor partners’ sales and marketing capabilities, providing them with a cost-effective way to reach customers and deliver a consistent brand experience through our established end-market coverage and extensive customer access.

We have two reportable segments: Corporate, which is comprised primarily of private sector business customers, and Public, which is comprised of government agencies and education and healthcare institutions. Our Corporate segment is divided into a medium/large business customer channel, primarily serving customers with more than 100 employees, and a small business customer channel, primarily serving customers with up to 100 employees. We also have two other operating segments, CDW Advanced Services and Canada, which do not meet the reportable segment quantitative thresholds and, accordingly, are combined together as “Other.” The CDW Advanced Services business consists primarily of customized engineering services delivered by technology specialists and engineers and managed services that include Infrastructure as a Service ("IaaS") offerings. Revenues from the sale of hardware, software, custom configuration and third-party provided services are recorded within our Corporate and Public segments.

We may sell all or only select products that our vendor partners offer. Each vendor partner agreement provides for specific terms and conditions, which may include one or more of the following: product return privileges, price protection policies, purchase discounts and vendor incentive programs, such as purchase or sales rebates and cooperative advertising reimbursements. We also resell software for major software publishers. Our agreements with software publishers allow the end-user customer to acquire software or licensed products and services. In addition to helping our customers determine the best software solutions for their needs, we help them manage their software agreements, including warranties and renewals. A significant portion of our advertising and marketing expenses is reimbursed through cooperative advertising reimbursement programs with our vendor partners. These programs are at the discretion of our vendor partners and are typically tied to sales or purchasing volumes or other commitments to be met by us within a specified period of time.

Trends and key factors affecting our financial performance

We believe the following trends may have an important impact on our financial performance:

• An important factor affecting our ability to generate sales and achieve our targeted operating results is the impact of general economic conditions on our customers’ willingness to spend on information technology. In the second quarter of 2012, we began to see customers take a more cautious approach to spending as increased macroeconomic uncertainty impacted decision-making and led to some customers delaying purchases. While we are beginning to see improvements in operating results, we will continue to closely monitor macroeconomic conditions for the remainder of 2013. Uncertainties related to the potential impacts of federal budget negotiations, potential changes in tax and regulatory policy, weakening consumer and business confidence or increased unemployment could result in reduced or deferred spending by our customers on information technology products and services and increased competitive pricing pressures.

31

• Our Public segment sales are impacted by government spending policies, budget priorities and revenue levels. An adverse change in any of these factors could cause our Public segment customers to reduce their purchases or to terminate or not renew contracts with us, which could adversely affect our business, results of operations or cash flows. Although our sales to the federal government are diversified across multiple agencies and departments, they collectively accounted for approximately 10%, 10% and 11% of our net sales for the years ended December 31, 2012, 2011 and 2010, respectively.

• We believe that our customers’ transition to more complex technology solutions will continue to be an important growth area for us in the future. However, because the market for technology products and services is highly competitive, our success at capitalizing on this transition will be based on our ability to tailor specific solutions to customer needs, the quality and breadth of our product and service offerings, the knowledge and expertise of our sales force, price, product availability and speed of delivery.

On July 2, 2013, we completed an initial public offering ("IPO") of 23,250,000 shares of common stock. On July 31, 2013, we completed the sale of an additional 3,487,500 shares of common stock to the underwriters of the IPO pursuant to the underwriters' July 26, 2013 exercise in full of the overallotment option granted to them in connection with the IPO. See Note 13 of the accompanying unaudited interim consolidated financial statements for additional discussion of our IPO. In connection with the IPO, we anticipate recording the following significant pre-tax expenses during the third quarter of 2013 in our consolidated statement of operations:

• Pre-tax charges of $36.7 million related to the acceleration of the expense recognition for certain equity awards and $4.0 million for the related employer payroll taxes. Such charges will be included in selling and administrative expenses in our consolidated statement of operations. See Note 7 of the accompanying unaudited interim consolidated financial statements for additional discussion of the impact of the IPO on our equity awards.

• A pre-tax charge of $24.4 million related to the payment of a termination fee to affiliates of Madison Dearborn Partners, LLC and Providence Equity Partners, L.L.C. in connection with the termination of the management services agreement with such entities, to be included in selling and administrative expenses in our consolidated statement of operations. See Note 13 of the accompanying unaudited interim consolidated financial statements for additional discussion of this transaction.

• A pre-tax charge of $16.7 million related to the July 2, 2013 redemption of $175.0 million aggregate principal amount of senior secured notes due 2018. This charge represents $14.0 million in redemption premium and $2.7 million for the write-off of a portion of the remaining deferred financing costs and will be included in loss on extinguishments of long-term debt in our consolidated statement of operations. See Note 13 of the accompanying unaudited interim consolidated financial statements for additional discussion of this redemption.

• A pre-tax charge of $24.7 million related to the August 1, 2013 redemption of $324.0 million aggregate principal amount of senior subordinated notes due 2017 using a portion of the net proceeds from the IPO and incremental borrowings under the senior secured term loan facility. This charge represents $20.3 million in redemption premium and $4.4 million for the write-off of a portion of the remaining deferred financing costs and will be included in loss on extinguishments of long-term debt in our consolidated statement of operations. See Note 13 of the accompanying unaudited interim consolidated financial statements for additional discussion of this redemption.

• A pre-tax charge of $7.5 million related to compensation expense in connection with the Restricted Debt Unit Plan following the redemption of the $324.0 million aggregate principal amount of senior subordinated notes due 2017 as discussed above. See Note 9 of the accompanying unaudited interim consolidated financial statements for additional discussion of this charge.

Key business metrics

Our management monitors a number of financial and non-financial measures and ratios on a regular basis in order to track the progress of our business and make adjustments as necessary. We believe that the most important of these measures and ratios include average daily sales, gross margin, operating margin, non-GAAP net income, EBITDA and Adjusted EBITDA, cash and cash equivalents, net working capital, cash conversion cycle (defined to be days of sales outstanding in accounts receivable plus days of supply in inventory minus days of purchases outstanding in accounts payable, based on a rolling three-month average), debt levels including available credit and leverage ratios, sales per coworker and coworker turnover. These measures and ratios are compared to standards or objectives set by management, so that actions can be taken, as necessary, in order to achieve the standards and objectives.

32

Non-GAAP net income, EBITDA and Adjusted EBITDA are considered non-GAAP financial measures. Generally, a non-GAAP financial measure is a numerical measure of a company's performance, financial position, or cash flows that either excludes or includes amounts that are not normally included or excluded in the most directly comparable measure calculated and presented in accordance with GAAP. Non-GAAP measures used by the Company may differ from similar measures used by other companies, even when similar terms are used to identify such measures. We believe that non-GAAP net income, EBITDA and Adjusted EBITDA provide helpful information with respect to our operating performance and cash flows including our ability to meet our future debt service, capital expenditures, and working capital requirements. Adjusted EBITDA also provides helpful information as it is the primary measure used in certain financial covenants contained in our credit agreements. See “Results of Operations” for the definition of non-GAAP net income and Adjusted EBITDA and a reconciliation of each to net income.

The results of certain key business metrics are as follows:

(dollars in millions)	Three months ended June 30,
	2013		2012
Net sales	$	2,779.3	$	2,584.7
Gross profit	451.6		426.9
Income from operations	153.6		136.4
Net income	46.7		36.8
Non-GAAP net income	79.2		67.2
Adjusted EBITDA	212.6		200.6
Average daily sales	43.4		40.4
Net debt (defined as total debt minus cash and cash equivalents)	3,545.1		3,712.7
Cash conversion cycle (in days)	21		21

Results of Operations

Three Months Ended June 30, 2013 Compared to Three Months Ended June 30, 2012

The following table presents our results of operations, in dollars and as a percentage of net sales, for the three months ended June 30, 2013 and 2012:

	Three Months Ended June 30, 2013					Three Months Ended June 30, 2012
	Dollars in Millions			Percentage of Net Sales		Dollars in Millions			Percentage of Net Sales
Net sales	$	2,779.3		100.0	%	$	2,584.7		100.0	%
Cost of sales	2,327.7			83.8		2,157.8			83.5
Gross profit	451.6			16.2		426.9			16.5
Selling and administrative expenses	266.4			9.6		259.5			10.0
Advertising expense	31.6			1.1		31.0			1.2
Income from operations	153.6			5.5		136.4			5.3
Interest expense, net	(70.3		)	(2.5	)	(76.9		)	(3.0	)
Net loss on extinguishments of long-term debt	(10.3		)	(0.4	)	—			—
Other income, net	0.2			—		0.2			—
Income before income taxes	73.2			2.6		59.7			2.3
Income tax expense	(26.5		)	(0.9	)	(22.9		)	(0.9	)
Net income	$	46.7		1.7	%	$	36.8		1.4	%

33

Net sales

The following table presents our net sales by segment, in dollars and as a percentage of total net sales, and the year-over-year dollar and percentage change in net sales for the three months ended June 30, 2013 and 2012:

	Three Months Ended June 30,
	2013				2012
(dollars in millions)	Net Sales		Percentage of Total Net Sales		Net Sales		Percentage of Total Net Sales		Dollar Change		Percent Change (1)
Corporate	$	1,537.4	55.3	%	$	1,394.4	53.9	%	$	143.0	10.3	%
Public	1,082.6		39.0		1,040.4		40.3		42.2		4.1
Other	159.3		5.7		149.9		5.8		9.4		6.2
Total net sales	$	2,779.3	100.0	%	$	2,584.7	100.0	%	$	194.6	7.5	%

⁽¹⁾ There were 64 selling days for both the three months ended June 30, 2013 and 2012.

The following table presents our net sales by customer channel for our Corporate and Public segments and the year-over-year dollar and percentage change in net sales for the three months ended June 30, 2013 and 2012:

(dollars in millions)	Three Months Ended June 30,				Dollar Change			Percent Change
	2013		2012
Corporate:
Medium / Large	$	1,271.4	$	1,124.7	$	146.7		13.0	%
Small Business	266.0		269.7		(3.7		)	(1.4	)
Total Corporate	$	1,537.4	$	1,394.4	$	143.0		10.3	%
Public:
Government	$	295.7	$	318.0	$	(22.3	)	(7.0	)%
Education	420.6		349.5		71.1			20.4
Healthcare	366.3		372.9		(6.6		)	(1.8	)
Total Public	$	1,082.6	$	1,040.4	$	42.2		4.1	%

Total net sales for the three months ended June 30, 2013 increased $194.6 million, or 7.5%, to $2,779.3 million, compared to $2,584.7 million for the three months ended June 30, 2012. There were 64 selling days for both the three months ended June 30, 2013 and 2012. The increase in total net sales was primarily the result of growth in hardware and software, a more tenured sales force and a continued focus on seller productivity across all areas of the organization. Our total net sales growth for the three months ended June 30, 2013 reflected unit volume growth in notebooks/mobile devices, netcomm products and enterprise storage as well as growth in software. Software gains were driven by growth in security, storage management software, network management software and operating systems, partially offset by a decrease in application suites.

Corporate segment net sales for the three months ended June 30, 2013 increased $143.0 million, or 10.3%, compared to the three months ended June 30, 2012, driven by sales growth in the medium/large customer channel. Within our Corporate segment, net sales to medium/large customers increased 13.0% between periods primarily due to certain of these customers increasing their IT spending, a more tenured sales force and a continued focus on seller productivity. This increase was led by unit volume growth in enterprise storage and netcomm products and growth in software and notebooks/mobile devices. Partially offsetting the growth in the medium/large customer channel was a 1.4% decrease in net sales to small business customers, due to certain of these customers continuing to take a more cautious approach to spending as macroeconomic and regulatory uncertainty impacted decision-making. This decrease was led by unit volume declines in notebooks/mobile devices.

Public segment net sales for the three months ended June 30, 2013 increased $42.2 million, or 4.1%, between periods, driven by strong performance in the education customer channel. Net sales to education customers increased $71.1 million, or 20.4%, between periods, led by growth in net sales to K-12 customers, reflecting higher sales of notebooks/mobile devices to support new standardized digital testing requirements that will take effect in 2014. Net sales to government customers decreased $22.3 million, or 7.0%, between periods due to delays in federal government spending following sequestration and the continuing resolution. The government customer channel net sales decline was led by decreases in sales of enterprise storage and servers. Net sales to healthcare customers decreased $6.6 million, or 1.8%, between periods, led by declines in software and point-of-care technology carts, partially offset by an increase in notebooks/mobile devices.

34

Gross profit

Gross profit increased $24.7 million, or 5.8%, to $451.6 million for the three months ended June 30, 2013, compared to $426.9 million for the three months ended June 30, 2012. As a percentage of total net sales, gross profit decreased 30 basis points to 16.2% for the three months ended June 30, 2013, down from 16.5% for the three months ended June 30, 2012. Gross profit margin was negatively impacted 40 basis points by unfavorable price/mix changes within product margin and 10 basis points by a $3.8 million accrual reversal in 2012 resulting from a favorable vendor audit outcome that did not repeat. Partially offsetting these decreases was an increase of 10 basis points due to a higher mix of commission revenue and net service contract revenue, and an increase of 10 basis points due to higher net sales and gross profit related to professional and managed services. Commission revenue, including agency fees earned on sales of software licenses and software assurance under enterprise agreements, has a positive impact on our gross profit margin, as we record the fee or commission as a component of net sales when earned and there is no corresponding cost of sales. Net service contract revenue, including items such as third-party services and warranties, also has a positive impact on gross profit margin as our cost paid to the vendor or third-party service provider is recorded as a reduction to net sales, resulting in net sales being equal to the gross profit on the transaction.

The gross profit margin may fluctuate based on various factors, including vendor incentive and inventory price protection programs, cooperative advertising funds classified as a reduction of cost of sales, product mix, net service contract revenue, commission revenue, pricing strategies, market conditions, and other factors, any of which could result in changes in gross profit margins.

Selling and administrative expenses

Selling and administrative expenses increased $6.9 million, or 2.7%, to $266.4 million for the three months ended June 30, 2013, compared to $259.5 million for the three months ended June 30, 2012. As a percentage of total net sales, selling and administrative expenses decreased 40 basis points to 9.6% in the second quarter of 2013, down from 10.0% in the second quarter of 2012. Sales payroll, including sales commissions and other variable compensation costs, increased $8.3 million, or 7.2%, between years, consistent with higher sales and gross profit, partially offset by the timing of coworker hiring. Additionally, consulting and advisory fees increased $1.6 million between years. Partially offsetting these increases was a reduction in non-cash compensation costs of $3.7 million between years related to our equity-based compensation plans, driven by the vesting period for certain awards being fully satisfied by the end of 2012. Total coworker count decreased by 99 coworkers from 6,909 at June 30, 2012 to 6,810 at June 30, 2013. Total coworker count was 6,804 at December 31, 2012.

Advertising expense

Advertising expense increased $0.6 million, or 2.2%, to $31.6 million for the three months ended June 30, 2013, compared to $31.0 million for the three months ended June 30, 2012. As a percentage of total net sales, advertising expense decreased 10 basis points to 1.1% in the second quarter of 2013, down from 1.2% in the second quarter of 2012. The increase in advertising expense was due to continued investments in promoting our solutions and services capabilities, investments in sales tools to support our sales organization and the leveraging of corporate communications to reinforce our reputation as a leading IT solutions provider.

35

Income from operations

The following table presents income (loss) from operations by segment, in dollars and as a percentage of net sales, and the year-over-year percentage change in income (loss) from operations for the three months ended June 30, 2013 and 2012:

	Three Months Ended June 30, 2013					Three Months Ended June 30, 2012
	Dollars in Millions			Operating Margin Percentage		Dollars in Millions			Operating Margin Percentage		Percent Change in Income (loss) from Operations
Segments: (1)
Corporate	$	103.2		6.7	%	$	92.3		6.6	%	11.7	%
Public	69.1			6.4		66.1			6.4		4.6
Other	8.9			5.6		5.0			3.3		76.7
Headquarters (2)	(27.6		)	nm*		(27.0		)	nm*		2.2
Total income from operations	$	153.6		5.5	%	$	136.4		5.3	%	12.6	%

*    Not meaningful

(1) Segment income from operations includes the segment’s direct operating income and allocations for Headquarters’ costs, allocations for logistics services, certain inventory adjustments, and volume rebates and cooperative advertising from vendors.

(2) Includes certain Headquarters’ function costs that are not allocated to the segments.

Income from operations was $153.6 million for the three months ended June 30, 2013, an increase of $17.2 million, or 12.6%, compared to $136.4 million for the three months ended June 30, 2012. The results for the three months ended June 30, 2013 were driven by higher net sales and gross profit, partially offset by higher selling and administrative expenses. Total operating margin percentage increased 20 basis points to 5.5% for the three months ended June 30, 2013, from 5.3% for the three months ended June 30, 2012. Operating margin percentage was positively impacted by the decrease in selling and administrative expenses and advertising expense as a percentage of net sales, partially offset by a decrease in gross profit margin.

Corporate segment income from operations was $103.2 million for the three months ended June 30, 2013, an increase of $10.9 million, or 11.7%, compared to $92.3 million for the three months ended June 30, 2012. This increase was primarily driven by higher net sales and gross profit, partially offset by higher selling and administrative expenses, resulting in a net increase in segment operating income before allocations of $2.0 million for the three months ended June 30, 2013 compared to the same period of 2012. In addition, Corporate segment income from operations benefited from an increase of $7.1 million in income allocations from our logistics operations and a decrease of $1.8 million in Headquarters’ expense allocations to the Corporate segment on a year-over-year basis. The improved profitability of our logistics operations was driven by stronger operating leverage given higher purchase volumes while support costs decreased slightly.

Public segment income from operations was $69.1 million for the three months ended June 30, 2013, an increase of $3.0 million, or 4.6%, compared to $66.1 million for the three months ended June 30, 2012. Public segment operating income before allocations was slightly lower as a result of lower gross profit, partially offset by lower selling and administrative expenses. Offsetting the decrease in operating income before allocations, the Public segment income from operations benefited from an increase of $3.3 million in income allocations from our logistics operations and a decrease of $0.7 million in Headquarters' expense allocations to the Public segment on a year-over-year basis.

Interest expense, net

At June 30, 2013, our outstanding long-term debt totaled $3,724.4 million compared to $3,871.4 million at June 30, 2012. Net interest expense for the three months ended June 30, 2013 was $70.3 million, a decrease of $6.6 million compared to $76.9 million for the three months ended June 30, 2012. Net interest expense decreased $5.8 million due to lower debt balances and effective interest rates for the three months ended June 30, 2013 compared to the same period of the prior year as a result of debt repayments and refinancing activities completed during 2012 and 2013. The remaining decrease was primarily attributable to reduced amortization of deferred financing costs for the three months ended June 30, 2013.

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Net loss on extinguishments of long-term debt

In April 2013, we entered into a new seven-year, $1,350.0 million aggregate principal amount senior secured term loan facility. Substantially all of the proceeds were used to repay the $1,299.5 million outstanding aggregate principal amount of the prior senior secured term loan facility. In connection with this refinancing, we recorded a loss on extinguishment of long-term debt of $10.3 million for the three months ended June 30, 2013, representing a write-off of the remaining unamortized deferred financing costs related to the prior senior secured term loan facility. We did not record any extinguishments of long-term debt during the three months ended June 30, 2012.

Income tax expense

Income tax expense was $26.5 million for the three months ended June 30, 2013, compared to income tax expense of $22.9 million for the same period of the prior year. The effective income tax rate, expressed by calculating the income tax expense as a percentage of income before income taxes, was 36.2% and 38.4% for the three months ended June 30, 2013 and 2012, respectively. The change in the effective income tax rate was primarily due to higher non-deductible equity compensation expense recorded in 2012 as compared to 2013.

Net income

Net income was $46.7 million for the three months ended June 30, 2013, compared to $36.8 million for the three months ended June 30, 2012. The results for the three months ended June 30, 2013 included an after-tax loss on extinguishment of long-term debt of $6.3 million. We did not record any extinguishments of long-term debt during the three months ended June 30, 2012. Other significant factors and events causing the net changes between the periods are discussed above.

Non-GAAP net income

Non-GAAP net income was $79.2 million for the three months ended June 30, 2013, an increase of $12.0 million, or 17.8%, compared to $67.2 million for the three months ended June 30, 2012.

We have included a reconciliation of Non-GAAP net income for the three months ended June 30, 2013 and 2012 below. Non-GAAP net income excludes, among other things, charges related to the amortization of acquisition-related intangibles, non-cash equity-based compensation and gains and losses from the early extinguishment of debt. Non-GAAP net income is considered a non-GAAP financial measure. Generally, a non-GAAP financial measure is a numerical measure of a company's performance, financial position, or cash flows that either excludes or includes amounts that are not normally included or excluded in the most directly comparable measure calculated and presented in accordance with GAAP. Non-GAAP measures used by the Company may differ from similar measures used by other companies, even when similar terms are used to identify such measures. We believe that Non-GAAP net income provides helpful information with respect to our operating performance and cash flows including our ability to meet our future debt service, capital expenditures, and working capital requirements.

(in millions)	Three Months Ended June 30,
	2013			2012
Net income	$	46.7		$	36.8
Amortization of intangibles (1)	40.1			41.1
Non-cash equity-based compensation	2.1			5.8
Net loss on extinguishments of long-term debt	10.3			—
Interest expense adjustment related to extinguishments of long-term debt (2)	—			—
IPO related expenses (3)	0.2			—
Aggregate adjustment for income taxes (4)	(20.2		)	(16.5		)
Non-GAAP net income	$	79.2		$	67.2

(1) Includes amortization expense for acquisition-related intangible assets, primarily customer relationships and trade names.

(2) Reflects adjustments to interest expense resulting from debt extinguishments. Represents the difference between interest expense previously recognized under the effective interest method and actual interest paid.

(3) Represents certain fees and costs expensed related to the IPO of the Company's shares.

(4) Based on a normalized effective tax rate of 39.0%.

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Adjusted EBITDA

Adjusted EBITDA was $212.6 million for the three months ended June 30, 2013, an increase of $12.0 million, or 6.0%, compared to $200.6 million for the three months ended June 30, 2012. As a percentage of net sales, Adjusted EBITDA was 7.6% for the three months ended June 30, 2013 compared to 7.8% for the three months ended June 30, 2012.

We have included a reconciliation of EBITDA and Adjusted EBITDA for the three months ended June 30, 2013 and 2012 in the table below. EBITDA is defined as consolidated net income before interest expense, income tax expense, depreciation and amortization. Adjusted EBITDA, which is a measure defined in our credit agreements, means EBITDA adjusted for certain items which are described in the table below. Both EBITDA and Adjusted EBITDA are considered non-GAAP financial measures. Generally, a non-GAAP financial measure is a numerical measure of a company's performance, financial position or cash flows that either excludes or includes amounts that are not normally included or excluded in the most directly comparable measure calculated and presented in accordance with GAAP. Non-GAAP measures used by the Company may differ from similar measures used by other companies, even when similar terms are used to identify such measures. We believe that EBITDA and Adjusted EBITDA provide helpful information with respect to our operating performance and cash flows including our ability to meet our future debt service, capital expenditures and working capital requirements. Adjusted EBITDA also provides helpful information as it is the primary measure used in certain financial covenants contained in our credit agreements.

(in millions)	Three Months Ended June 30,
	2013		2012
Net income	$	46.7	$	36.8
Depreciation and amortization	52.3		53.2
Income tax expense	26.5		22.9
Interest expense, net	70.3		76.9
EBITDA	195.8		189.8
Adjustments:
Non-cash equity-based compensation	2.1		5.8
Sponsor fee	1.3		1.2
Consulting and debt-related professional fees	0.3		0.4
Net loss on extinguishments of long-term debt	10.3		—
Other adjustments (1)	2.8		3.4
Total adjustments	16.8		10.8
Adjusted EBITDA	$	212.6	$	200.6

(1) Other adjustments primarily include certain retention costs and equity investment income.

38

Six Months Ended June 30, 2013 Compared to Six Months Ended June 30, 2012

The following table presents our results of operations, in dollars and as a percentage of net sales, for the six months ended June 30, 2013 and 2012:

	Six Months Ended June 30, 2013					Six Months Ended June 30, 2012
	Dollars in Millions			Percentage of Net Sales		Dollars in Millions			Percentage of Net Sales
Net sales	$	5,191.0		100.0	%	$	4,903.9		100.0	%
Cost of sales	4,337.4			83.6		4,092.4			83.5
Gross profit	853.6			16.4		811.5			16.5
Selling and administrative expenses	517.9			9.9		511.1			10.4
Advertising expense	62.0			1.2		60.4			1.2
Income from operations	273.7			5.3		240.0			4.9
Interest expense, net	(142.4		)	(2.7	)	(155.8		)	(3.2	)
Net loss on extinguishments of long-term debt	(14.2		)	(0.3	)	(9.4		)	(0.2	)
Other income, net	0.6			—		—			—
Income before income taxes	117.7			2.3		74.8			1.5
Income tax expense	(42.7		)	(0.9	)	(27.1		)	(0.5	)
Net income	$	75.0		1.4	%	$	47.7		1.0	%

Net sales

The following table presents our net sales by segment, in dollars and as a percentage of total net sales, and the year-over-year dollar and percentage change in net sales for the six months ended June 30, 2013 and 2012:

	Six Months Ended June 30,
	2013				2012
(dollars in millions)	Net Sales		Percentage of Total Net Sales		Net Sales		Percentage of Total Net Sales		Dollar Change		Percent Change (1)
Corporate	$	2,941.3	56.7	%	$	2,757.2	56.2	%	$	184.1	6.7	%
Public	1,929.4		37.2		1,858.0		37.9		71.4		3.8
Other	320.3		6.1		288.7		5.9		31.6		10.9
Total net sales	$	5,191.0	100.0	%	$	4,903.9	100.0	%	$	287.1	5.9	%

⁽¹⁾ There were 127 selling days for the six months ended June 30, 2013, compared to 128 selling days for the six months ended June 30, 2012. On an average daily basis, total net sales increased 6.7%.

The following table presents our net sales by customer channel for our Corporate and Public segments and the year-over-year dollar and percentage change in net sales for the six months ended June 30, 2013 and 2012:

(dollars in millions)	Six Months Ended June 30,				Dollar Change			Percent Change
	2013		2012
Corporate:
Medium / Large	$	2,417.6	$	2,214.3	$	203.3		9.2	%
Small Business	523.7		542.9		(19.2		)	(3.5	)
Total Corporate	$	2,941.3	$	2,757.2	$	184.1		6.7	%
Public:
Government	$	548.0	$	580.6	$	(32.6	)	(5.6	)%
Education	652.9		571.2		81.7			14.3
Healthcare	728.5		706.2		22.3			3.2
Total Public	$	1,929.4	$	1,858.0	$	71.4		3.8	%

39

Total net sales for the six months ended June 30, 2013 increased $287.1 million, or 5.9%, to $5,191.0 million, compared to $4,903.9 million for the six months ended June 30, 2012. There were 127 selling days for the six months ended June 30, 2013, compared to 128 selling days for the six months ended June 30, 2012. On an average daily basis, total net sales increased 6.7%. The increase in total net sales was primarily the result of growth in hardware and software, a more tenured sales force and a continued focus on seller productivity across all areas of the organization. Our total net sales growth for the six months ended June 30, 2013 reflected increased sales of software and unit volume growth in netcomm products and notebooks/mobile devices. Software gains were driven by growth in security, operating systems, storage management and virtualization software, partially offset by a decline in application suites.

Corporate segment net sales for the six months ended June 30, 2013 increased $184.1 million, or 6.7%, compared to the six months ended June 30, 2012, driven by sales growth in the medium/large customer channel. On an average daily basis, Corporate segment net sales increased 7.5% between periods. Within our Corporate segment, net sales to medium/large customers increased 9.2% between periods primarily due to certain of these customers increasing their IT spending, a more tenured sales force and a continued focus on seller productivity. This increase was led by unit volume growth in netcomm products and growth in software, enterprise storage and notebooks/mobile devices. Partially offsetting the growth in the medium/large customer channel was a 3.5% decrease in net sales to small business customers, due to certain of these customers continuing to take a more cautious approach to spending as macroeconomic and regulatory uncertainty impacted decision-making. This decrease was led by unit volume declines in notebooks/mobile devices, partially offset by growth in netcomm products.

Public segment net sales for the six months ended June 30, 2013 increased $71.4 million, or 3.8%, between periods, driven by strong performance in the education customer channel. On an average daily basis, Public segment net sales increased 4.7% between periods. Net sales to education customers increased $81.7 million, or 14.3%, between periods, led by growth in net sales to K-12 customers, reflecting increased sales of notebooks/mobile devices to support new standardized digital testing requirements that will take effect in 2014. Net sales to government customers decreased $32.6 million, or 5.6%, between periods due to delays in federal government spending following sequestration and the continuing resolution. The government customer channel net sales decline was led by decreases in sales of servers, enterprise storage and printers, partially offset by growth in software. Net sales to healthcare customers increased $22.3 million, or 3.2%, between periods, driven by unit volume growth in notebooks/mobile devices and growth in software.

Gross profit

Gross profit increased $42.1 million, or 5.2%, to $853.6 million for the six months ended June 30, 2013, compared to $811.5 million for the six months ended June 30, 2012. As a percentage of total net sales, gross profit decreased 10 basis points to 16.4% for the six months ended June 30, 2013, down from 16.5% for the six months ended June 30, 2012. Gross profit margin was negatively impacted 40 basis points by unfavorable price/mix changes within product margin. Partially offsetting this decrease was an increase of 20 basis points due to a higher mix of commission revenue and net service contract revenue and an increase of 10 basis points due to higher net sales and gross profit related to professional and managed services. Commission revenue, including agency fees earned on sales of software licenses and software assurance under enterprise agreements, has a positive impact on our gross profit margin, as we record the fee or commission as a component of net sales when earned and there is no corresponding cost of sales. Net service contract revenue, including items such as third-party services and warranties, also has a positive impact on gross profit margin as our cost paid to the vendor or third-party service provider is recorded as a reduction to net sales, resulting in net sales being equal to the gross profit on the transaction.

The gross profit margin may fluctuate based on various factors, including vendor incentive and inventory price protection programs, cooperative advertising funds classified as a reduction of cost of sales, product mix, net service contract revenue, commission revenue, pricing strategies, market conditions, and other factors, any of which could result in changes in gross profit margins.

Selling and administrative expenses

Selling and administrative expenses increased $6.8 million, or 1.3%, to $517.9 million for the six months ended June 30, 2013, compared to $511.1 million for the six months ended June 30, 2012. As a percentage of total net sales, selling and administrative expenses decreased 50 basis points to 9.9% in the first half of 2013, down from 10.4% in the first half of 2012. Sales payroll, including sales commissions and other variable compensation costs, increased $13.6 million, or 6.1%, between years, consistent with higher sales and gross profit, partially offset by the timing of coworker hiring. Partially offsetting this increase was a reduction in non-cash compensation costs of $7.5 million between years related to our equity-based compensation plans, driven by the vesting period for certain awards being fully satisfied by the end of 2012. Total coworker count decreased by 99 coworkers from 6,909 at June 30, 2012 to 6,810 at June 30, 2013. Total coworker count was 6,804 at December 31, 2012.

40

Advertising expense

Advertising expense increased $1.6 million, or 2.6%, to $62.0 million for the six months ended June 30, 2013, compared to $60.4 million for the six months ended June 30, 2012. As a percentage of total net sales, advertising expense was 1.2% for both the six months ended June 30, 2013 and 2012. The increase in advertising expense was due to continued investments in promoting our solutions and services capabilities, investments in sales tools to support our sales organization and the leveraging of corporate communications to reinforce our reputation as a leading IT solutions provider.

Income from operations

The following table presents income (loss) from operations by segment, in dollars and as a percentage of net sales, and the year-over-year percentage change in income (loss) from operations for the six months ended June 30, 2013 and 2012:

	Six Months Ended June 30, 2013					Six Months Ended June 30, 2012
	Dollars in Millions			Operating Margin Percentage		Dollars in Millions			Operating Margin Percentage		Percent Change in Income (loss) from Operations
Segments: (1)
Corporate	$	197.3		6.7	%	$	177.1		6.4	%	11.4	%
Public	114.7			5.9		108.2			5.8		6.1
Other	14.9			4.7		7.5			2.6		98.8
Headquarters (2)	(53.2		)	nm*		(52.8		)	nm*		(0.9	)
Total income from operations	$	273.7		5.3	%	$	240.0		4.9	%	14.0	%

*    Not meaningful

(1) Segment income from operations includes the segment’s direct operating income and allocations for Headquarters’ costs, allocations for logistics services, certain inventory adjustments, and volume rebates and cooperative advertising from vendors.

(2) Includes certain Headquarters’ function costs that are not allocated to the segments.

Income from operations was $273.7 million for the six months ended June 30, 2013, an increase of $33.7 million, or 14.0%, compared to $240.0 million for the six months ended June 30, 2012. The results for the six months ended June 30, 2013 were driven by higher net sales and gross profit, partially offset by higher selling and administrative expenses. Total operating margin percentage increased 40 basis points to 5.3% for the six months ended June 30, 2013, from 4.9% for the six months ended June 30, 2012. Operating margin percentage benefited from the decrease in selling and administrative expenses as a percentage of net sales, partially offset by a decrease in gross profit margin.

Corporate segment income from operations was $197.3 million for the six months ended June 30, 2013, an increase of $20.2 million, or 11.4%, compared to $177.1 million for the six months ended June 30, 2012. This increase was primarily driven by higher net sales and gross profit, partially offset by higher selling and administrative expenses, resulting in a net increase in segment operating income before allocations of $7.5 million for the six months ended June 30, 2013 compared to the same period of 2012. In addition, Corporate segment income from operations benefited from an increase of $7.5 million in income allocations from our logistics operations and a decrease of $5.1 million in Headquarters’ expense allocations to the Corporate segment on a year-over-year basis. The improved profitability of our logistics operations was driven by stronger operating leverage given higher purchase volumes while support costs decreased.

Public segment income from operations was $114.7 million for the six months ended June 30, 2013, an increase of $6.5 million, or 6.1%, compared to $108.2 million for the six months ended June 30, 2012. The increase reflected higher segment operating income before allocations of $0.5 million as a result of increased net sales and gross profit dollars. In addition, Public segment income from operations benefited from an increase of $3.8 million in income allocations from our logistics operations and a decrease of $2.3 million in Headquarters' expense allocations on a year-over-year basis.

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Interest expense, net

At June 30, 2013, our outstanding long-term debt totaled $3,724.4 million compared to $3,871.4 million at June 30, 2012. Net interest expense for the six months ended June 30, 2013 was $142.4 million, a decrease of $13.4 million compared to $155.8 million for the six months ended June 30, 2012. Net interest expense decreased $11.0 million due to lower debt balances and effective interest rates for the six months ended June 30, 2013 compared to the same period of the prior year as a result of debt repayments and refinancing activities completed during 2012 and 2013. The remaining decrease was primarily attributable to reduced amortization of deferred financing costs for the six months ended June 30, 2013.

Net loss on extinguishments of long-term debt

During the six months ended June 30, 2013, we recorded a net loss on extinguishments of long-term debt of $14.2 million compared to $9.4 million for the same period in 2012.

In April 2013, we entered into a new seven-year, $1,350.0 million aggregate principal amount senior secured term loan facility. Substantially all of the proceeds were used to repay the $1,299.5 million outstanding aggregate principal amount of the prior senior secured term loan facility. In connection with this refinancing, we recorded a loss on extinguishment of long-term debt of $10.3 million for the six months ended June 30, 2013, representing a write-off of the remaining unamortized deferred financing costs related to the prior senior secured term loan facility.

In March 2013, we redeemed $50.0 million aggregate principal amount of senior subordinated notes due 2017 for $53.1 million. We recorded a loss on extinguishment of long-term debt of $3.9 million for the six months ended June 30, 2013, representing the difference between the redemption price and the net carrying amount of the purchased debt, adjusted for a portion of the unamortized deferred financing costs.

In February and March 2012, we purchased or redeemed the remaining $129.0 million of senior notes due 2015, funded with the issuance of an additional $130.0 million of senior notes due 2019. As a result, we recorded a loss on extinguishment of long-term debt of $9.4 million for the six months ended June 30, 2012, representing the difference between the purchase or redemption price of the senior notes due 2015 and the net carrying amount of the purchased debt, adjusted for the remaining unamortized deferred financing costs.

Income tax expense

Income tax expense was $42.7 million for the six months ended June 30, 2013, compared to income tax expense of $27.1 million for the same period of the prior year. The effective income tax rate, expressed by calculating income tax expense as a percentage of income before income taxes, was 36.3% and 36.2% for the six months ended June 30, 2013 and 2012, respectively. Favorable adjustments to state tax credits recorded in 2012 were offset by the impact of higher non-deductible equity compensation expense recorded in 2012, resulting in a minimal impact on the effective tax rate.

Net income

Net income was $75.0 million for the six months ended June 30, 2013, compared to $47.7 million for the six months ended June 30, 2012. The results for the six months ended June 30, 2013 and 2012 included after-tax losses on extinguishments of long-term debt of $8.7 million and $5.7 million, respectively. Other significant factors and events causing the net changes between the periods are discussed above.

Non-GAAP net income

Non-GAAP net income was $135.5 million for the six months ended June 30, 2013, an increase of $22.4 million, or 19.8%, compared to $113.1 million for the six months ended June 30, 2012.

We have included a reconciliation of Non-GAAP net income for the six months ended June 30, 2013 and 2012 below. Non-GAAP net income excludes, among other things, charges related to the amortization of acquisition-related intangibles, non-cash equity-based compensation and gains and losses from the early extinguishment of debt. Non-GAAP net income is considered a non-GAAP financial measure. Generally, a non-GAAP financial measure is a numerical measure of a company's performance, financial position, or cash flows that either excludes or includes amounts that are not normally included or excluded in the most directly comparable measure calculated and presented in accordance with GAAP. Non-GAAP measures used by the Company may differ from similar measures used by other companies, even when similar terms are used to identify such measures. We believe that Non-GAAP net income provides helpful information with respect to our operating performance and cash flows including our ability to meet our future debt service, capital expenditures, and working capital requirements.

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(in millions)	Six Months Ended June 30,
	2013			2012
Net income	$	75.0		$	47.7
Amortization of intangibles (1)	80.5			82.2
Non-cash equity-based compensation	4.0			11.5
Net loss on extinguishments of long-term debt	14.2			9.4
Interest expense adjustment related to extinguishments of long-term debt (2)	(0.8		)	(1.7		)
IPO related expenses (3)	0.2			—
Aggregate adjustment for income taxes (4)	(37.6		)	(36.0		)
Non-GAAP net income	$	135.5		$	113.1

(1) Includes amortization expense for acquisition-related intangible assets, primarily customer relationships and trade names.

(2) Reflects adjustments to interest expense resulting from debt extinguishments. Represents the difference between interest expense previously recognized under the effective interest method and actual interest paid.

(3) Represents certain fees and costs expensed related to the IPO of the Company's shares.

(4) Based on a normalized effective tax rate of 39.0%.

Adjusted EBITDA

Adjusted EBITDA was $391.2 million for the six months ended June 30, 2013, an increase of $24.2 million, or 6.6%, compared to $367.0 million for the six months ended June 30, 2012. As a percentage of net sales, Adjusted EBITDA was 7.5% for both the six months ended June 30, 2013 and 2012.

We have included a reconciliation of EBITDA and Adjusted EBITDA for the six months ended June 30, 2013 and 2012 in the table below. EBITDA is defined as consolidated net income before interest expense, income tax expense, depreciation and amortization. Adjusted EBITDA, which is a measure defined in our credit agreements, means EBITDA adjusted for certain items which are described in the table below. Both EBITDA and Adjusted EBITDA are considered non-GAAP financial measures. Generally, a non-GAAP financial measure is a numerical measure of a company's performance, financial position or cash flows that either excludes or includes amounts that are not normally included or excluded in the most directly comparable measure calculated and presented in accordance with GAAP. Non-GAAP measures used by the Company may differ from similar measures used by other companies, even when similar terms are used to identify such measures. We believe that EBITDA and Adjusted EBITDA provide helpful information with respect to our operating performance and cash flows including our ability to meet our future debt service, capital expenditures and working capital requirements. Adjusted EBITDA also provides helpful information as it is the primary measure used in certain financial covenants contained in our credit agreements.

(in millions)	Six Months Ended June 30,
	2013		2012
Net income	$	75.0	$	47.7
Depreciation and amortization	104.3		105.7
Income tax expense	42.7		27.1
Interest expense, net	142.4		155.8
EBITDA	364.4		336.3
Adjustments:
Non-cash equity-based compensation	4.0		11.5
Sponsor fee	2.5		2.5
Consulting and debt-related professional fees	0.4		0.5
Net loss on extinguishments of long-term debt	14.2		9.4
Other adjustments (1)	5.7		6.8
Total adjustments	26.8		30.7
Adjusted EBITDA	$	391.2	$	367.0

(1) Other adjustments primarily include certain retention costs and equity investment income.

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The following table sets forth a reconciliation of EBITDA to net cash provided by operating activities for the six months ended June 30, 2013 and 2012.

	Six Months Ended June 30,
(in millions)	2013			2012
EBITDA	$	364.4		$	336.3
Depreciation and amortization	(104.3		)	(105.7		)
Income tax expense	(42.7		)	(27.1		)
Interest expense, net	(142.4		)	(155.8		)
Net income	75.0			47.7
Depreciation and amortization	104.3			105.7
Equity-based compensation expense	4.0			11.5
Deferred income taxes	(23.5		)	(32.0		)
Allowance for doubtful accounts	—			—
Amortization of deferred financing costs and debt premium	5.3			8.0
Net loss on extinguishments of long-term debt	14.2			9.4
Other	—			0.9
Changes in assets and liabilities	27.8			153.5
Net cash provided by operating activities	$	207.1		$	304.7

Seasonality

While we have not historically experienced significant seasonality throughout the year, sales in our Corporate segment, which primarily serves private sector business customers, are typically higher in the fourth quarter than in other quarters due to customers spending their remaining technology budget dollars at the end of the year. Additionally, sales in our Public segment have historically been higher in the third quarter than in other quarters primarily due to the buying patterns of the federal government and education customers.

Liquidity and Capital Resources

Overview

We finance our operations and capital expenditures through a combination of internally-generated cash from operations and from borrowings under our senior secured asset-based revolving credit facility. We believe that our current sources of funds will be sufficient to fund our cash operating requirements for the next year. In addition, we believe that, in spite of the uncertainty of future macroeconomic conditions, we have adequate sources of liquidity and funding available to meet our longer-term needs. However, there are a number of factors that may negatively impact our available sources of funds. The amount of cash generated from operations will be dependent upon factors such as the successful execution of our business plan and general economic conditions.

On July 2, 2013, we completed an IPO of 23,250,000 shares of common stock. On July 31, 2013, we completed the sale of an additional 3,487,500 shares of common stock to the underwriters of the IPO pursuant to the underwriters' July 26, 2013 exercise in full of the overallotment option granted to them in connection with the IPO. Such shares were registered under the Securities Act of 1933, as amended, pursuant to our Registration Statement on Form S-1, which was declared effective by the Securities and Exchange Commission ("SEC") on June 26, 2013. Our common shares are listed on the NASDAQ Global Select Market under the symbol “CDW.” Our common shares were sold to the underwriters at a price of $17.00 per share in the IPO and upon the exercise of the overallotment option, which generated aggregate net proceeds of approximately $429.5 million to us after deducting underwriting discounts, before expenses and transaction costs.

Using a portion of the net proceeds from the IPO, we paid a $24.4 million termination fee to affiliates of Madison Dearborn Partners, LLC and Providence Equity Partners, L.L.C. in connection with the termination of the management services agreement with such entities that was effective upon completion of the IPO and redeemed $175.0 million aggregate principal amount of senior secured notes due 2018. The redemption price of the senior secured notes due 2018 was 108.000% of the principal amount redeemed, plus $0.7 million of accrued and unpaid interest to the date of redemption. We used cash on hand to pay such accrued and unpaid interest. Following this redemption, $325.0 million aggregate principal amount of the senior secured notes due 2018 remain outstanding. In connection with this redemption, we expect to record a loss on extinguishment of long-term debt of $16.7 million in the consolidated statement of operations during the third quarter of 2013. This loss

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represents $14.0 million in redemption premium and $2.7 million for the write-off of a portion of the remaining deferred financing costs related to the senior secured notes due 2018.

On August 1, 2013, we redeemed $324.0 million aggregate principal amount of senior subordinated notes due 2017. We used a portion of the net proceeds from the IPO to redeem $146.0 million aggregate principal amount of senior subordinated notes due 2017 and incremental borrowings of $190.0 million under the senior secured term loan facility to redeem $178.0 million aggregate principal amount of senior subordinated notes due 2017. The redemption price of the senior subordinated notes due 2017 was 106.268% of the principal amount redeemed, plus $12.0 million of accrued and unpaid interest to the date of redemption. We used cash on hand to pay such accrued and unpaid interest. Following this redemption, $247.5 million aggregate principal amount of the senior subordinated notes due 2017 remain outstanding. In connection with this redemption, we expect to record a loss on extinguishment of long-term debt of $24.7 million in the consolidated statement of operations during the third quarter of 2013. This loss represents $20.3 million in redemption premium and $4.4 million for the write-off of a portion of the remaining deferred financing costs related to the senior subordinated notes due 2017.

We previously filed a claim as part of a class action settlement in a case alleging price fixing during the period of January 1, 1996 through December 31, 2006, by certain manufacturers of thin-film liquid crystal display panels. On July 13, 2013, the United Stated District Court for the Northern District of California approved distribution of the settlement proceeds, including a net payment to us of approximately $10.5 million after fees and expenses. The first of two settlement payments was received by us on July 29, 2013 in the amount of $8.5 million. The balance is expected to be received by year-end 2013.

We expect to pay a quarterly cash dividend on our common stock of $0.0425 per share, or $0.17 per annum, commencing in the fourth quarter of 2013. The payment of such dividend in the fourth quarter of 2013 and any future dividends will be at the discretion of our board of directors and will depend upon our results of operations, financial condition, business prospects, capital requirements, contractual restrictions, any potential indebtedness we may incur, restrictions imposed by applicable law, tax considerations and other factors that our board of directors deems relevant. In addition, our ability to pay dividends on our common stock will be limited by restrictions on our ability to pay dividends or make distributions to our stockholders and on the ability of our subsidiaries to pay dividends or make distributions to us, in each case, under the terms of our current and any future agreements governing our indebtedness.

Cash Flows

Cash flows from operating, investing and financing activities were as follows:

(in millions)	Six Months Ended June 30,
	2013			2012
Net cash provided by (used in):
Operating activities	$	207.1		$	304.7
Investing activities	(20.0		)	(15.7		)
Net change in accounts payable-inventory financing	33.3			(25.5		)
Other cash flows from financing activities	(77.6		)	(204.6		)
Financing activities	(44.3		)	(230.1		)
Effect of exchange rate changes on cash and cash equivalents	(1.4		)	(0.1		)
Net increase in cash and cash equivalents	$	141.4		$	58.8

Operating Activities

Net cash provided by operating activities for the six months ended June 30, 2013 decreased $97.6 million compared to the same period of 2012, primarily driven by changes in working capital. During the six months ended June 30, 2013, accounts receivable represented a use of cash of $108.9 million compared to cash generated of $19.8 million for the prior year period. The year-over-year increase in accounts receivable driven by sales growth also reflected slower cash collections in 2013 across the business partially due to a slight deterioration in collection performance during the first six months of 2013 compared to the same period in 2012. The $19.8 million cash contribution during the six months ended June 30, 2012 reflected a continuation of working capital initiatives that drove increased cash collections during the period. During the six months ended June 30, 2013, the net cash contribution from accounts payable-trade was $253.8 million compared to $170.5 million during the same period in 2012. The increase in accounts payable-trade between years was primarily due to higher purchase volumes to support the increase in net sales. A higher mix of payables with certain vendors from whom we have more favorable payment terms and favorable timing of quarter-end payments also contributed to the increase.

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In order to manage our working capital and operating cash needs, we monitor our cash conversion cycle, defined as days of sales outstanding in accounts receivable plus days of supply in inventory, less days of purchases outstanding in accounts payable. The following table presents the components of our cash conversion cycle:

(in days)	June 30,
	2013		2012
Days of sales outstanding (DSO) (1)	41		40
Days of supply in inventory (DIO) (2)	15		14
Days of purchases outstanding (DPO) (3)	(35	)	(33	)
Cash conversion cycle	21		21

(1) Represents the rolling three month average of the balance of trade accounts receivable, net at the end of the period divided by average daily net sales for the same three-month period. Also incorporates components of other miscellaneous receivables.

(2) Represents the rolling three month average of the balance of inventory at the end of the period divided by average daily cost of sales for the same three-month period.

(3) Represents the rolling three month average of the combined balance of accounts payable-trade, excluding cash overdrafts, and accounts payable-inventory financing at the end of the period divided by average daily cost of sales for the same three-month period.

The cash conversion cycle remained flat at 21 days for both June 30, 2013 and 2012. The increase in DSO was primarily driven by an increase in receivables for third-party services such as software assurance and warranties. These services have an unfavorable impact on DSO as the receivable is recognized on the balance sheet on a gross basis while the corresponding sales amount in the statement of operations is recorded on a net basis. Slower collection rates during the second quarter of 2013 compared to the year ago period also contributed to the increase in DSO. The increase in DPO was primarily due to a higher mix of payables with certain vendors from whom we have more favorable payment terms and an increase in payables for third-party services, which offsets the related increase in DSO discussed above. These services have a favorable impact on DPO as the payable is recognized on the balance sheet without a corresponding cost of sales in the statement of operations because the cost paid to the vendor or third-party service provider is recorded as a reduction to net sales. The timing of quarter-end payments also had a favorable impact on DPO at June 30, 2013. The increase in DIO was primarily due to higher purchase volumes to support the increase in net sales.

Investing Activities

Net cash used in investing activities for the six months ended June 30, 2013 increased $4.3 million compared to the same period of the prior year. Capital expenditures were $20.0 million and $15.7 million for the six months ended June 30, 2013 and 2012, respectively, primarily for improvements to our information technology systems during both periods.

Financing Activities

Net cash used in financing activities decreased $185.8 million during the six months ended June 30, 2013 compared to the same period in 2012. The decrease was primarily driven by debt transactions and changes in accounts payable-inventory financing, partially offset by a June 2013 payment of withholding taxes for the IPO-related settlement of MPK units. The net impact of our debt transactions resulted in cash outflows of $54.2 million and $204.3 million during the six months ended June 30, 2013 and 2012, respectively, as cash was used in each period to reduce our total long-term debt. The decrease in debt transactions was primarily attributable to a lower 2013 required prepayment related to the excess cash flow provision of the prior senior secured term loan facility. Debt transactions impacting each period presented are described below under "Long-Term Debt and Financing Arrangements." In addition, during the six months ended June 30, 2013, changes in accounts payable-inventory financing represented a cash contribution of $33.3 million compared to a $25.5 million use of cash for the six months ended June 30, 2012. The 2013 increase in accounts payable-inventory financing was primarily due to higher purchase volumes from a certain vendor to support the overall increase in net sales. The corresponding reduction in cash during the first six months of 2012 was primarily due to the termination of one of our inventory financing agreements during the first quarter of 2012. As a result of this termination, we began reporting the amounts owed for subsequent purchases as accounts payable-trade on the consolidated balance sheets and as cash flows from operating activities in the consolidated statements of cash flows.

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Long-Term Debt and Financing Arrangements

Long-term debt was as follows:

(dollars in millions)	Interest Rate (1)		June 30, 2013			December 31, 2012
Senior secured asset-based revolving credit facility	—	%	$	—		$	—
Senior secured term loan facility	3.5	%	1,346.6			1,339.5
Unamortized discount on senior secured term loan facility			(3.3		)	—
Senior secured notes due 2018	8.0	%	500.0			500.0
Senior notes due 2019	8.5	%	1,305.0			1,305.0
Unamortized premium on senior notes due 2019			4.6			5.0
Senior subordinated notes due 2017	12.535	%	571.5			621.5
Senior notes due 2015	—	%	—			—
Total long-term debt			3,724.4			3,771.0
Less current maturities of long-term debt			(13.5		)	(40.0		)
Long-term debt, excluding current maturities			$	3,710.9		$	3,731.0

(1)Weighted-average interest rate at June 30, 2013.

At June 30, 2013, we were in compliance with the covenants under our various credit agreements as described below.

Senior Secured Asset-Based Revolving Credit Facility (“Revolving Loan”)

At June 30, 2013, we had no outstanding borrowings under the Revolving Loan, $1.2 million of undrawn letters of credit and $267.4 million reserved related to the floorplan sub-facility. The Revolving Loan matures on June 24, 2016.

In connection with the floorplan sub-facility, we maintain a Revolving Loan inventory financing agreement with a financial intermediary. At June 30, 2013, the financial intermediary reported an outstanding balance of $258.6 million under the Revolving Loan inventory financing agreement. The total amount reported on the consolidated balance sheet as accounts payable-inventory financing related to the Revolving Loan inventory financing agreement is $21.9 million more than the $258.6 million owed to the financial intermediary due to differences in the timing of reporting activity under the Revolving Loan inventory financing agreement. The outstanding balance reported by the financial intermediary excludes $8.8 million in reserves for open orders that reduce the availability under the Revolving Loan.

Availability under the Revolving Loan is limited to (a) the lesser of the revolving commitment of $900.0 million and the amount of the borrowing base less (b) outstanding borrowings, letters of credit, and amounts outstanding under the Revolving Loan inventory financing agreement plus a reserve of 15% of open orders. At June 30, 2013, the borrowing base was $1,098.8 million based on the amount of eligible inventory and accounts receivable balances as of May 31, 2013. We could have borrowed up to an additional $631.4 million under the Revolving Loan at June 30, 2013.

Senior Secured Term Loan Facility

On April 29, 2013, we entered into a new seven-year, $1,350.0 million aggregate principal amount senior secured term loan facility (the "Term Loan"). Substantially all of the proceeds from the Term Loan were used to repay the $1,299.5 million outstanding aggregate principal amount of the prior senior secured term loan facility (the "Prior Term Loan Facility"). In connection with this refinancing, we recorded a loss on extinguishment of long-term debt of $10.3 million in the consolidated statement of operations for the three and six months ended June 30, 2013. This loss represented a write-off of the remaining unamortized deferred financing costs related to the Prior Term Loan Facility.

The Term Loan was issued at a price of 99.75% of par, which resulted in a discount of $3.4 million. This discount is reported on the consolidated balance sheet as a reduction to the face amount of the Term Loan and is being amortized over the term of the related debt. Borrowings under the Term Loan bear interest at either (a) the alternate base rate ("ABR") plus a margin or (b) LIBOR plus a margin; provided that for the purposes of the Term Loan, LIBOR shall not be less than 1.00% per annum at any time. The margin is based upon a net leverage ratio as defined in the agreement governing the Term Loan, ranging from 1.25%-1.50% for ABR borrowings and 2.25%- 2.50% for LIBOR borrowings.

Unlike the Prior Term Loan Facility, the Term Loan does not include a senior secured leverage ratio requirement or a hedging requirement. Additionally, the definition of debt under the Term Loan was revised to exclude amounts outstanding

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under our inventory financing agreements. The Term Loan is subject to certain requirements as was the Prior Term Loan Facility to make mandatory annual excess cash flow prepayments under designated circumstances, including (i) a prepayment in an amount equal to 50% of our excess cash flow for a fiscal year (the percentage rate of which decreases to 25% when the total net leverage ratio, as defined in the governing agreement, is less than or equal to 5.5 but greater than 4.5; and decreases to 0% when the total net leverage ratio is less than or equal to 4.5), and (ii) the net cash proceeds from the incurrence of certain additional indebtedness by us or our subsidiaries. The total net leverage ratio was 4.5 and 4.9 at June 30, 2013 and December 31, 2012, respectively. The total net leverage ratio at December 31, 2012 has been revised to conform to the definition in the agreement governing the Term Loan.

We are required to pay quarterly principal installments equal to $3.375 million, with the remaining principal amount payable on the maturity date of April 29, 2020. The quarterly principal installment payments commenced during the quarter ended June 30, 2013. At June 30, 2013, the outstanding principal amount of the Term Loan was $1,346.6 million, excluding $3.3 million in unamortized discount.

We have ten interest rate cap agreements in effect through January 14, 2015 with a combined notional amount of $1,150.0 million. These cap agreements have not been designated as cash flow hedges of interest rate risk for GAAP accounting purposes. Of the total $1,150.0 million notional amount, $500.0 million entitle us to payments from the counterparty of the amount, if any, by which three-month LIBOR exceeds 3.5% during the agreement period. The remaining cap agreements with a notional amount of $650.0 million entitle us to payments from the counterparty of the amount, if any, by which the three-month LIBOR exceeds 1.5% during the agreement period. The fair value of our interest rate cap agreements was $0.2 million at June 30, 2013 and $0.1 million at December 31, 2012.

On January 30, 2013, we made an optional prepayment of $40.0 million aggregate principal amount outstanding under the Prior Term Loan Facility. The optional prepayment satisfied the excess cash flow payment provision of the Prior Term Loan Facility with respect to the year ended December 31, 2012.

See Note 13 to the accompanying unaudited interim consolidated financial statements for a description of the incremental borrowings under the Term Loan completed during the third quarter of 2013.

8.0% Senior Secured Notes due 2018 (“Senior Secured Notes”)

The Senior Secured Notes were issued on December 17, 2010 and mature on December 15, 2018. At June 30, 2013, the outstanding principal amount of the Senior Secured Notes was $500.0 million.

See Note 13 to the accompanying unaudited interim consolidated financial statements for a description of the partial redemption of Senior Secured Notes completed during the third quarter of 2013.

11.0% Senior Exchange Notes due 2015 (“Senior Exchange Notes”); 11.5% / 12.25% Senior PIK Election Exchange Notes due 2015 (“PIK Election Notes” together with the Senior Exchange Notes, the “Senior Notes due 2015”)

At June 30, 2013 and December 31, 2012, there were no outstanding Senior Notes due 2015.

In February and March 2012, we purchased or redeemed the remaining $129.0 million aggregate principal amount of Senior Notes due 2015, funded with the issuance of $130.0 million aggregate principal amount of additional Senior Notes (as defined below). In connection with these transactions, we recorded a loss on extinguishment of long-term debt of $9.4 million in the consolidated statement of operations for the six months ended June 30, 2012. This loss represented $7.9 million in tender and redemption premiums and $1.5 million for the write-off of the remaining unamortized deferred financing costs related to the Senior Notes due 2015.

8.5% Senior Notes due 2019 (“Senior Notes”)

On February 17, 2012, we issued $130.0 million aggregate principal amount of additional Senior Notes at an issue price of 104.375% of par. The $5.7 million premium received is reported on the consolidated balance sheets as an addition to the face amount of the Senior Notes and is being amortized as a reduction to interest expense over the term of the related debt. At June 30, 2013, the outstanding principal amount of Senior Notes was $1,305.0 million, excluding $4.6 million in unamortized premium. The Senior Notes mature on April 1, 2019.

12.535% Senior Subordinated Exchange Notes due 2017 (“Senior Subordinated Notes”)

At June 30, 2013, the outstanding principal amount of our Senior Subordinated Notes was $571.5 million. The Senior Subordinated Notes mature on October 12, 2017.

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On March 8, 2013, we redeemed $50.0 million aggregate principal amount of Senior Subordinated Notes at a redemption price that was 106.268% of the principal amount redeemed. Cash on hand was used to fund the redemption of $50.0 million aggregate principal amount, $3.1 million of redemption premium and $2.5 million in accrued and unpaid interest. In connection with this redemption, we recorded a loss on extinguishment of long-term debt of $3.9 million in the consolidated statement of operations for the six months ended June 30, 2013. This loss represented $3.1 million in redemption premium and $0.8 million for the write-off of a portion of the unamortized deferred financing costs related to the Senior Subordinated Notes.

See Note 13 to the accompanying unaudited interim consolidated financial statements for a description of the partial redemption of Senior Subordinated Notes completed during the third quarter of 2013.

Inventory Financing Agreements

We have 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 accompanying consolidated balance sheets. We do not incur any interest expense associated with these agreements as balances are paid when they are due.

The following table presents the amounts included in accounts payable-inventory financing:

(in millions)	June 30, 2013		December 31, 2012
Revolving Loan inventory financing agreement	$	280.5	$	248.3
Other inventory financing agreements	2.0		0.9
Accounts payable-inventory financing	$	282.5	$	249.2

We maintain a senior secured asset-based revolving credit facility as described above and in Note 4 to the consolidated financial statements, which incorporates a $400.0 million floorplan sub-facility to facilitate the purchase of inventory from a certain vendor. In connection with the floorplan sub-facility, we maintain an inventory financing agreement on an unsecured basis with a financial intermediary to facilitate the purchase of inventory from this vendor (the “Revolving Loan inventory financing agreement”). Amounts outstanding under the Revolving Loan inventory financing agreement are unsecured and non-interest bearing.

We also maintain other inventory financing agreements with financial intermediaries to facilitate the purchase of inventory from certain vendors. At June 30, 2013 and December 31, 2012, amounts owed under other inventory financing agreements of $2.0 million and $0.9 million, respectively, were collateralized by the inventory purchased under these financing agreements and a second lien on the related accounts receivable.

Contractual Obligations

Other than as discussed above in "Overview" and “Long-Term Debt and Financing Arrangements,” there have been no material changes to our contractual obligations from those reported in our Annual Report on Form 10-K for the year ended December 31, 2012.

Off-Balance Sheet Arrangements

We have no off-balance sheet arrangements that have or are reasonably likely to have a material current or future effect on our financial condition, changes in financial condition, revenues or expenses, results of operations, liquidity, capital expenditures or capital resources.

Commitments and Contingencies

We are party to various legal proceedings that arise in the ordinary course of our business, which include commercial, intellectual property, employment, tort and other litigation matters. We are also subject to audit by federal, state and local authorities, by various partners and large customers, including government agencies, relating to purchases and sales under various contracts. In addition, we are subject to indemnification claims under various contracts. From time to time, certain of our customers file voluntary petitions for reorganization or liquidation under the U.S. bankruptcy laws. In such cases, certain pre-petition payments received by us could be considered preference items and subject to return to the bankruptcy administrator.

As of June 30, 2013, we do 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

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proceedings and matters are inherently unpredictable. As such, our financial condition and results of operations could be adversely affected in any particular period by the unfavorable resolution of one or more of these proceedings or matters.

Critical Accounting Policies and Estimates

Our critical accounting policies have not changed from those reported in Item 7 “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in our Annual Report on Form 10-K for the year ended December 31, 2012.

Recent Accounting Pronouncements

Disclosure of the Effects of Reclassifications from Accumulated Other Comprehensive Income

In February 2013, the Financial Accounting Standards Board issued Accounting Standards Update 2013-02, which required that the effects of significant reclassifications from accumulated other comprehensive income to net income be shown parenthetically on the face of the consolidated financial statements or disclosed in a note. The adoption of this new guidance on January 1, 2013 did not have an impact on our consolidated financial position, results of operations or cash flows.

Forward-Looking Statements

This report contains forward-looking statements within the meaning of the federal securities laws. All statements other than statements of historical fact included in this report are forward-looking statements. These statements relate to analyses and other information, which are based on forecasts of future results and estimates of amounts not yet determinable. These statements also relate to our future prospects, developments and business strategies. We claim the protection of The Private Securities Litigation Reform Act of 1995 for all forward-looking statements in this report.

These forward-looking statements are identified by the use of terms and phrases such as “anticipate,” “believe,” “could,” “estimate,” “expect,” “intend,” “may,” “plan,” “predict,” “project,” “will” and similar terms and phrases, including references to assumptions. However, these words are not the exclusive means of identifying such statements. Although we believe that our plans, intentions and expectations reflected in or suggested by such forward-looking statements are reasonable, we cannot assure you that we will achieve those plans, intentions or expectations. All forward-looking statements are subject to risks and uncertainties that may cause actual results to differ materially from those that we expected.

Important factors that could cause actual results to differ materially from our expectations, or cautionary statements, are disclosed under the section entitled “Risk Factors” included in our Annual Report on Form 10-K for the year ended December 31, 2012 and other subsequent filings with the SEC, including but not limited to CDW Corporation's prospectus filed pursuant to Rule 424(b)(4) under the Securities Act of 1933, as amended, dated as of June 26, 2013 and filed with the Securities and Exchange Commission on June 28, 2013 (Reg. No. 333-187472). All written and oral forward-looking statements attributable to us, or persons acting on our behalf, are expressly qualified in their entirety by the cautionary statements contained in the section entitled “Risk Factors” included elsewhere in this report as well as other cautionary statements that are made from time to time in our other SEC filings and public communications. You should evaluate all forward-looking statements made in this report in the context of these risks and uncertainties.

We caution you that the important factors referenced above may not contain all of the factors that are important to you. In addition, we cannot assure you that we will realize the results or developments we expect or anticipate or, even if substantially realized, that they will result in the consequences or affect us or our operations in the way we expect. The forward-looking statements included in this report are made only as of the date hereof. We undertake no obligation to publicly update or revise any forward-looking statement as a result of new information, future events or otherwise, except as otherwise required by law.

Item 3. Quantitative and Qualitative Disclosures About Market Risk

See “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Quantitative and Qualitative Disclosures of Market Risks” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012. As of June 30, 2013, there had been no material change in this information.

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Item 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

The Company's management, with the participation of the Company's Chief Executive Officer and Chief Financial Officer, has evaluated the effectiveness of the Company's disclosure controls and procedures (as such term is defined in Rule 13a-15(e) or Rule 15d-15(e) under the Securities Exchange Act of 1934, as amended (the "Exchange Act”)) as of the end of the period covered by this report. Based on such evaluation, the Company's management, including the Company's Chief Executive Officer and Chief Financial Officer, has concluded that, as of the end of such period, the Company's disclosure controls and procedures were effective in recording, processing, summarizing, and reporting, on a timely basis, information required to be disclosed by the Company in the reports that it files or submits under the Exchange Act, and that information is accumulated and communicated to the Company's management, including the Company's Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely discussions regarding required disclosure.

Changes in Internal Control over Financial Reporting

There were no changes in the Company’s internal control over financial reporting during the quarter ended June 30, 2013 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

PART II—OTHER INFORMATION

Item 1. Legal Proceedings

See Note 10 “Commitments and Contingencies” to the accompanying unaudited interim consolidated financial statements.

Item 1A. Risk Factors

The risk factors disclosed in the prospectus filed pursuant to Rule 424(b)(4) under the Securities Act of 1933, as amended, dated as of June 26, 2013 and filed with the Securities and Exchange Commission on June 28, 2013 (Reg. No. 333-187472) are hereby incorporated by reference.

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

Use of Proceeds from Registered Securities

On July 2, 2013, the Company completed an initial public offering ("IPO") of its common stock in which it issued and sold 23,250,000 shares of common stock. On July 31, 2013, the Company completed the sale of an additional 3,487,500 shares of common stock to the underwriters of the IPO pursuant to the underwriters' July 26, 2013 exercise in full of the overallotment option granted to them in connection with the IPO. Such shares were registered under the Securities Act of 1933, as amended, pursuant to the Company's Registration Statement on Form S-1 (File 333-187472), which was declared effective by the SEC on June 26, 2013. The common shares are listed on the NASDAQ Global Select Market under the symbol “CDW.” The Company's common shares were sold to the underwriters at a price of $17.00 per share in the IPO and upon the exercise of the overallotment option, which generated aggregate net proceeds of approximately $424.5 million to the Company after deducting $29.9 million in underwriting discounts, and a reasonable estimate of expenses and transaction costs. Using a portion of the net proceeds from the IPO, the Company paid a $24.4 million termination fee to affiliates of Madison Dearborn Partners, LLC and Providence Equity Partners, L.L.C. in connection with the termination of the management services agreement with such entities that was effective upon completion of the IPO, redeemed $175.0 million aggregate principal amount of senior secured notes due 2018, and redeemed $146.0 million aggregate principal amount of senior subordinated notes due 2017. The redemption price of the senior secured notes due 2018 was 108.000% of the principal amount redeemed, plus accrued and unpaid interest to the date of redemption. The Company used cash on hand to pay such accrued and unpaid interest. The redemption price of the senior subordinated notes due 2017 was 106.268% of the principal amount redeemed, plus accrued and unpaid interest to the date of redemption. The Company used cash on hand to pay such accrued and unpaid interest. Proceeds from the overallotment option exercise will be used for general corporate purposes.

 J.P. Morgan Securities LLC, Barclays Capital Inc. and Goldman, Sachs & Co. acted as joint book-running managers of the IPO and as representatives of the underwriters. Deutsche Bank Securities Inc. and Morgan Stanley & Co. LLC acted as additional book-running managers in the IPO. Robert W. Baird & Co. Incorporated, Raymond James & Associates, Inc., William Blair & Company, L.L.C., Needham & Company, LLC, Stifel, Nicolaus & Company, Incorporated, Loop Capital Markets LLC and The Williams Capital Group, L.P. acted as managing underwriters in the IPO.

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Item 3. Defaults Upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

Our bylaws, as amended and restated on June 13, 2013, establish an advance notice procedure for nominations by stockholders of candidates for election as directors. Subject to any other applicable requirements, including, without limitation, Rule 14a-8 under the Securities Exchange Act of 1934, as amended ("Exchange Act"), nominations of persons for election to our Board may be made at an annual meeting of stockholders or a special meeting (provided that our Board has determined that directors are to be elected at such special meeting) by any stockholder of record who was a stockholder of record at the time of the giving of notice for the meeting and at the time of the meeting, who is entitled to vote at the meeting and who has complied with our notice procedures.

For nominations to be properly brought before a meeting by a stockholder:

• the stockholder must have given timely notice in writing to our Corporate Secretary;

• the stockholder and any beneficial owner of shares held by the stockholder must have acted in accordance with certain representations set forth in a nomination solicitation statement required by our bylaws; and

• if the stockholder, or the beneficial owner on whose behalf any such nomination is made, has provided us with a stockholder notice (as described below), such stockholder or beneficial owner must have delivered a proxy statement and form of proxy to holders of a percentage of our voting shares reasonably believed by such stockholder or beneficial holder to be sufficient to elect the nominee or nominees proposed to be nominated by such stockholder.

To be timely in the case of an annual meeting, a stockholder's notice must be delivered to our Corporate Secretary at our principal executive offices not less than 90 nor more than 120 days prior to the first anniversary of the preceding year's annual meeting of stockholders. However, if the date of the annual meeting is advanced more than 30 days prior to or delayed by more than 30 days after the anniversary of the preceding year's annual meeting, or if no annual meeting was held in the preceding year, notice by the stockholder to be timely must be so delivered not later than the close of business on the later of (i) the 90th day prior to such annual meeting or (ii) the tenth day following the day on which public announcement of the date of such meeting is first made. To be timely in the case of a special meeting, a stockholder's notice must be delivered to our Corporate Secretary not more than 120 days prior to such special meeting and not later than the close of business on the later of (i) the 90th day prior to such special meeting or (ii) the tenth day following the day on which public announcement of the date of such meeting is first made.

A stockholder's notice must set forth:

• as to each person that the stockholder proposes to nominate for election or reelection as a director, all information relating to such person as would be required to be disclosed in the solicitation of proxies or consents for the election of such nominees as directors pursuant to Regulation 14A under the Exchange Act and such person's written consent to serve as a director if elected, as well as any other information required by the SEC's proxy rules in a contested election;

• as to the stockholder giving the notice and the beneficial owner, if any, on whose behalf the nomination is made;

• the name and address of such stockholder, as they appear on our books, and of such beneficial owner;

• the class or series and number of shares of our common stock that are owned beneficially and of record by such stockholder and such beneficial owner, including any derivative positions of the stockholder;

• information with respect to persons or entities affiliated with the stockholder and any arrangements between such stockholder or such beneficial owner and the nominee and any other person or entities pursuant to which the nomination is to be made by such stockholder; and

• whether either such stockholder or beneficial owner intends to deliver a proxy statement and/or form of proxy to holders of a sufficient number of holders of our voting shares reasonably believed by such stockholder or beneficial owner to elect such nominee or nominees (an affirmative statement of such intent).

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In the event that the number of directors to be elected to our Board is increased and there is no public announcement naming all of the nominees for director or specifying the size of the increased Board made by us at least ten days prior to the last day a stockholder may deliver a notice of nomination under our bylaws, a stockholder's notice required by our bylaws also will be considered timely, but only with respect to nominees for any new positions created by such increase, if it is received by our Corporate Secretary at the principal executive offices not later than the close of business on the tenth day following the day on which such public announcement is first made by us.

The preceding five paragraphs are intended to summarize the provisions of our bylaws addressing the procedures by which stockholders may recommend nominees to our Board. These summaries are qualified in their entirety by reference to those bylaws, which are filed as Exhibit 3.2 to this Quarterly Report on Form 10-Q.

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Item 6. Exhibits

Exhibit	Description
3.1	Fifth Amended and Restated Certificate of Incorporation of CDW Corporation, previously filed as Exhibit 3.1 with CDW Corporation's Amendment No. 2 to Form S-1 filed on June 14, 2013 (Reg. No. 333-187472) and incorporated herein by reference.
3.2	Amended and Restated By-Laws of CDW Corporation, previously filed as Exhibit 3.2 with CDW Corporation's Amendment No. 2 to Form S-1 filed on June 14, 2013 (Reg. No. 333-187472) and incorporated herein by reference.
10.1	Term Loan Agreement, dated as of April 29, 2013, by and among CDW LLC, the lenders from time to time party thereto, Barclays Bank PLC, as administrative agent and collateral agent, and the joint lead arrangers, joint bookrunners, co-syndication agents and co-documentation agents party thereto, previously filed as Exhibit 10.1 with CDW Corporation's Form 8-K filed on May 1, 2013 and incorporated herein by reference.
10.2	First Amendment to Term Loan Agreement, dated as of May 30, 2013, by and among CDW LLC, the lenders from time to time party thereto, and Barclays Bank PLC, as administrative agent and collateral agent, previously filed as Exhibit 10.3 with CDW Corporation's Amendment No. 2 to Form S-1 filed on June 14, 2013 (Reg. No. 333-187472) and incorporated herein by reference.
10.3	Second Amended and Restated Guarantee and Collateral Agreement, dated April 29, 2013, by and among CDW LLC, the guarantors party thereto and Barclays Bank PLC, as collateral agent, previously filed as Exhibit 10.2 with CDW Corporation's Form 8-K filed on May 1, 2013 and incorporated herein by reference.
10.4	Termination Agreement, dated as of June 12, 2013, by and among CDW Corporation, Madison Dearborn Partners V-B, L.P. and Providence Equity Partners L.L.C., previously filed as Exhibit 10.6 with CDW Corporation's Amendment No. 2 to Form S-1 filed on June 14, 2013 (Reg. No. 333-187472) and incorporated herein by reference.
10.5	Form of Indemnification Agreement by and between CDW Corporation and its directors and officers, previously filed as Exhibit 10.32 with CDW Corporation's Amendment No. 2 to Form S-1 filed on June 14, 2013 (Reg. No. 333-187472) and incorporated herein by reference.
10.6	Stockholders Agreement, dated as of June 10, 2013, by and among CDW Corporation, Madison Dearborn Capital Partners V-A, L.P., Madison Dearborn Capital Partners V-C, L.P., Madison Dearborn Capital Partners V Executive-A, L.P., Providence Equity Partners VI L.P., Providence Equity Partners VI-A L.P. and the other securityholders party thereto, previously filed as Exhibit 10.33 with CDW Corporation's Amendment No. 2 to Form S-1 filed on June 14, 2013 (Reg. No. 333-187472) and incorporated herein by reference.
10.7	CDW Corporation 2013 Senior Management Incentive Plan, previously filed as Exhibit 10.34 with CDW Corporation's Amendment No. 2 to Form S-1 filed on June 14, 2013 (Reg. No. 333-187472) and incorporated herein by reference.
10.8	CDW Corporation 2013 Long-Term Incentive Plan, previously filed as Exhibit 10.35 with CDW Corporation's Amendment No. 2 to Form S-1 filed on June 14, 2013 (Reg. No. 333-187472) and incorporated herein by reference.
10.9	CDW Corporation Coworker Stock Purchase Plan, previously filed as Exhibit 10.36 with CDW Corporation's Amendment No. 2 to Form S-1 filed on June 14, 2013 (Reg. No. 333-187472) and incorporated herein by reference.
10.10	Form of CDW Corporation Option Award Notice and Stock Option Agreement (to be executed by Thomas E. Richards), previously filed as Exhibit 10.37 with CDW Corporation's Amendment No. 2 to Form S-1 filed on June 14, 2013 (Reg. No. 333-187472) and incorporated herein by reference.
10.11	Form of CDW Corporation Option Award Notice and Stock Option Agreement (to be executed by Neal J. Campbell and Christina M. Corley), previously filed as Exhibit 10.38 with CDW Corporation's Amendment No. 2 to Form S-1 filed on June 14, 2013 (Reg. No. 333-187472) and incorporated herein by reference.
10.12	Form of CDW Corporation Restricted Stock Award Notice and Restricted Stock Award Agreement (executed by Thomas E. Richards, Dennis G. Berger, Douglas E. Eckrote, Christine A. Leahy, Jonathan J. Stevens and Ann E. Ziegler).
10.13	Form of CDW Corporation Restricted Stock Award Notice and Restricted Stock Award Agreement (executed by Neal J. Campbell, Christina M. Corley, Christina V. Rother and Matthew A. Troka).
10.14	CDW Amended and Restated Restricted Debt Unit Plan, previously filed as Exhibit 10.41 with CDW Corporation's Amendment No. 2 to Form S-1 filed on June 14, 2013 (Reg. No. 333-187472) and incorporated herein by reference.

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31.1	Certification of Chief Executive Officer Pursuant to Rule 15d-14(a) under the Securities Exchange Act of 1934
31.2	Certification of Chief Financial Officer Pursuant to Rule 15d-14(a) under the Securities Exchange Act of 1934
32.1	Certification of Chief Executive Officer Pursuant to 18 U.S.C. 1350
32.2	Certification of Chief Financial Officer Pursuant to 18 U.S.C. 1350
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

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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.

		CDW CORPORATION
Date:	August 12, 2013	By:	/s/ Ann E. Ziegler
			Ann E. Ziegler
			Senior Vice President and Chief Financial Officer
			(Duly authorized officer and principal financial officer)

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EX-10.12

CDW CORPORATION

2013 LONG-TERM INCENTIVE PLAN

Restricted Stock Award Notice

[Name of Holder]

You have been awarded shares of restricted stock of CDW Corporation (the “Company”) pursuant to the terms and conditions of the CDW Corporation 2013 Long-Term Incentive Plan (the “Plan”) and the Restricted Stock Award Agreement (together with this Award Notice, the “Agreement”). This Award is granted in exchange for the unvested Class B Units held by the Holder in CDW Holdings LLC, pursuant to Section 14.1 of the CDW Holdings LLC Amended and Restated Limited Liability Company Agreement, dated as of March 10, 2010. Copies of the Plan and the Restricted Stock Award Agreement are attached hereto. Capitalized terms not defined herein shall have the meanings specified in the Plan or the Agreement.

Restricted Stock: You have been awarded [____] restricted shares of Common Stock, par value $0.01per share, subject to adjustment as provided in Section 8.2 of the Agreement.

Grant Date: [___________]

Vesting Schedule: Except as otherwise provided in the Plan, the Agreement or any other agreement between the Company or any of its Subsidiaries and Holder, and subject to the forfeiture condition in Section 1 of the Agreement, the Award shall vest daily on a pro rata basis commencing on the Grant Date and continuing through [____________] if, and only if, Holder is, and has been, continuously (except for any absence for vacation, leave, etc. in accordance with the Company's or its Subsidiaries' policies): (i) employed by the Company or any of its Subsidiaries, (ii) serving as a Non-Employee Director or (iii) providing services to the Company or any of its Subsidiaries as an advisor or consultant, in each case, from the date of this Agreement through and including such date.

CDW CORPORATION

By: ______________________________

Name: Thomas E. Richards

Title: Chairman and Chief Executive Officer

Acknowledgment, Acceptance and Agreement:

By signing below and returning this Award Notice to CDW Corporation, I hereby acknowledge receipt of the Agreement and the Plan, accept the Award granted to me and agree to be bound by the terms and conditions of this Award Notice, the Agreement and the Plan.

______________________________

Holder                

______________________________

Date

2

CDW CORPORATION

2013 LONG-TERM INCENTIVE PLANRESTRICTED STOCK AWARD AGREEMENT

CDW Corporation, a Delaware corporation (the “Company”), hereby grants to the individual (the “Holder”) named in the award notice attached hereto (the “Award Notice”) as of the date set forth in the Award Notice (the “Grant Date”), pursuant to the provisions of the CDW Corporation 2013 Long-Term Incentive Plan (the “Plan”), a restricted stock award (the “Award”) for the number of shares of the Company’s Common Stock, par value $0.01per share (“Stock”) set forth in the Award Notice, upon and subject to the restrictions, terms and conditions set forth in the Plan and this agreement (the “Agreement”). This Award is granted in exchange for the unvested Class B Units held by the Holder in CDW Holdings LLC, a Delaware limited liability company (“CDW Holdings”), pursuant to Section 14.1 of the CDW Holdings LLC Amended and Restated Limited Liability Company Agreement, dated as of March 10, 2010. Capitalized terms not defined herein shall have the meanings specified in the Plan.

1.Award Subject to Acceptance of Agreement. The Award shall be null and void unless the Holder (a) accepts this Agreement by executing the Award Notice in the space provided therefor and returning an original execution copy of the Award Notice to the Company (or electronically accepts this Agreement within the Holder’s stock plan account with the Company’s stock plan administrator according to the procedures then in effect), (b) if required by the Company, executes and returns one or more irrevocable stock powers to facilitate the transfer to the Company (or its assignee or nominee) of all or a portion of the shares of Stock subject to the Award if any shares of Stock are forfeited pursuant to Section 4 or if required under applicable laws or regulations and (c) agrees to abide by all administrative procedures established by the Company or its stock plan administrator, including any procedures requiring the Holder to notify the Company of any proposed sale of any Stock acquired upon the vesting of this Award. As soon as practicable after the Holder has executed such documents and returned them to the Company, the Company shall cause to be issued in the Holder’s name the total number of shares of Stock subject to the Award. In addition, in the event that the Company’s initial public offering of the Stock (the “IPO”) does not close on or before August 31, 2013, this Award shall be forfeited as of such date and, consistent with the documents being executed by the Holder in connection with the Distribution (as defined below), the Holder will at such time continue to hold the unvested Class B Units held by the Holder in CDW Holdings for which the shares of Stock received hereunder were exchanged. For purposes of this Agreement, “Distribution” shall mean the distribution of shares of Stock by CDW Holdings to its members immediately prior to the pricing of the IPO.

2.Rights as a Stockholder. Except as otherwise provided in this Agreement, the Holder shall have all rights as a holder of the Stock subject to the Award, including, without limitation, the right to receive dividends and other distributions thereon, and the right to participate in any capital adjustment applicable to all holders of Stock unless and until such shares are forfeited pursuant to Section 4 hereof;provided, however, that (i) the Holder shall not

3

be entitled to vote the shares of Stock subject to the Award until such shares become vested pursuant to Section 4.1 and (ii) each distribution with respect to shares of Stock that is a stock dividend or stock split, shall be delivered to the Company (and the Holder shall, if requested by the Company, execute and return one or more irrevocable stock powers related thereto) and shall be subject to the same restrictions as the shares of Stock with respect to which such dividend or other distribution was made.

3.Custody and Delivery of Shares. The shares of Stock subject to the Award shall be held by the Company or by a custodian in book entry form, with restrictions on the shares of Stock duly noted, until such Award shall have vested, in whole or in part, pursuant to Section 4 hereof. Alternatively, in the sole discretion of the Company, the Company shall hold a certificate or certificates representing the shares of Stock subject to the Award until such Award shall have vested, in whole or in part, pursuant to Section 4 hereof. After all or any portion of the Award shall have vested pursuant to Section 4 hereof, the Company shall, subject to Section 8.1 hereof, transfer the vested shares of Stock on its books or deliver the certificate or certificates for the vested shares of Stock, as applicable, to a brokerage account in the name of the Holder, which transfer to the brokerage account shall occur (i) as soon as administratively practicable after the Company receives a request for such transfer from the Holder (but in no event later than 30 days after such request) or (ii) in the absence of such request from the Holder, automatically as soon as administratively practicable after the last day of each calendar month after the Grant Date, subject to such other procedures and restrictions that the Company may determine are necessary or appropriate to comply with Rule 144 of the Securities Act of 1933, as amended (the “Securities Act”), or any resale restrictions to which the Holder is subject. If the Company delivers certificate(s) for the vested shares of Stock pursuant to the foregoing sentence, the Company shall also destroy the stock power or powers relating to such vested Stock delivered by the Holder pursuant to Section 1 hereof; provided that, if such stock power or powers also relate to unvested Stock, the Company may require, as a condition precedent to delivery of any certificate pursuant to this Section 3, the execution and delivery to the Company of one or more stock powers relating to such unvested Stock.

4.Restriction Period and Vesting.

4.1.Service-Based Vesting Condition. Except as otherwise provided in this Section 4, the Award shall vest in accordance with the vesting schedule set forth in the Award Notice if, and only if, the Holder is, and has been, continuously (except for any absence for vacation, leave, etc. in accordance with the Company's or its Subsidiaries' policies): (i) employed by the Company or any of its Subsidiaries, (ii) serving as a Non-Employee Director or (iii) providing services to the Company or any of its Subsidiaries as an advisor or consultant, in each case, from the date of this Agreement through and including such date. The period of time prior to the vesting shall be referred to herein as the “Restriction Period.”

4.2.Termination of Employment due to Death or Disability. If the Holder’s employment with the Company terminates prior to the end of the Restriction Period by reason of the Holder’s death or Disability, then in either such case the Award shall become vested as of the date of termination with respect to a number of additional shares of Stock that would have

4

become vested during the one-year period following the date of such termination if the Holder’s employment with the Company had continued through such date and the remainder of the Award that was not vested immediately prior to Holder’s death or termination due to Disability and which did not otherwise become vested pursuant to this Section 4.2 shall be immediately forfeited by the Holder and cancelled by the Company. For purposes of this Award, “Disability” shall have the meaning set forth in the employment agreement, if any, between the Holder and the Company or any of its Subsidiaries, provided that if Holder is not a party to an employment agreement that contains such definition, then “Disability” shall mean Holder’s inability, due to illness, accident, injury, physical or mental incapacity or other disability, to carry out effectively Holder’s duties and obligations to the Company or any of its Subsidiaries or, if applicable based on Holder’s position, to participate effectively and actively in the management of the Company or any of its Subsidiaries for a period of at least 90 consecutive days or for shorter periods aggregating at least 120 days (whether or not consecutive) during any twelve month period, as determined in the reasonable judgment of the Board. A Disability shall be deemed to have occurred on the date that either Holder or Holder’s personal representative or legal guardian, on the one hand, or the Company, on the other hand, provides notice to the other party of the satisfaction of each of the requirements to constitute a Disability set forth above or on such other date as the parties shall mutually agree.

4.3.Termination by the Company Other than for Death or Disability or by the Holder. If the Holder’s employment with the Company terminates prior to the end of the Restriction Period (i) by the Company for any reason (other than by reason of the Holder’s death or Disability) or (ii) by the Holder by reason of the Holder’s resignation from employment for any reason, then the portion of the Award that was not vested immediately prior to such termination of employment shall be immediately forfeited by the Holder and cancelled by the Company.

4.4.Change in Control. In the event of a Change in Control, the shares of Stock subject to Award that were not vested immediately prior to such Change in Control shall become fully vested.

5.Clawback of Proceeds.

5.1.Clawback of Proceeds. If, during the three-year period following the Holder’s termination of employment the Holder materially violates any agreement between the Holder and the Company or its Subsidiaries with respect to non-competition (other than a Competitive Activity (as defined below) that does not violate any such non-competition covenant, non-solicitation, confidentiality or protection of trade secrets (or similar provision regarding intellectual property), including Section 7 of this Agreement: (i) the restricted shares of Stock subject to the Award shall be forfeited and (ii) the Holder shall immediately remit a cash payment to the Company equal to (x) the Fair Market Value of a share of Common Stock on the date on which the Company first became aware of such violation or the date of Holder’s termination of employment, whichever is greater, multiplied by (y) the number of shares of Common Stock that became vested pursuant to Section 4.1 of this Agreement. The remedy provided by this Section 5 shall terminate at such time as the Institutional Investors (as defined

5

below) collectively hold less than 10% of the number of shares of Stock held by the Institutional Investors as a result of the Distribution. In addition, the remedy provided by this Section 5 shall be in addition to and not in lieu of any rights or remedies which the Company may have against the Holder in respect of a breach by the Holder of any duty or obligation to the Company.

5.2.Right of Setoff. The Holder agrees that by accepting the Award Notice the Holder authorizes the Company and its affiliates to deduct any amount or amounts owed by the Holder pursuant to this Section 5 from any amounts payable by or on behalf of the Company or any affiliate to the Holder, including, without limitation, any amount payable to the Holder as salary, wages, vacation pay, bonus or the settlement of the Award or any stock-based award. This right of setoff shall not be an exclusive remedy and the Company’s or an affiliate’s election not to exercise this right of setoff with respect to any amount payable to the Holder shall not constitute a waiver of this right of setoff with respect to any other amount payable to the Holder or any other remedy. By the Holder’s signature, this agreement constitutes the Holder’s written authorization for the Company or any of its affiliates to make such deductions from wages.

5.3.Definitions. For purposes of this Section 5, the following terms shall have the following meanings:

(a)“Competitive Activity” means Holder becoming employed by, performing services for, or otherwise becoming associated with (as an employee, officer, director, manager, partner or consultant or member, stockholder or investor owning more than a 2% interest or other similar role) a Competitor (as defined below) of the Company.

(b)“Institutional Investors” means, collectively, Madison Dearborn Capital Partners V‑A, L.P., a Delaware limited partnership, Madison Dearborn Capital Partners V‑C, L.P., a Delaware limited partnership, Madison Dearborn Capital Partners V Executive‑A, L.P., a Delaware limited partnership, Providence Equity Partners VI L.P., a Delaware limited partnership, and Providence Equity Partners VI‑A L.P., a Delaware limited partnership.

6.Transfer Restrictions and Investment Representation.

6.1.Nontransferability of Award. During the Restriction Period, the shares of Stock subject to the Award and not then vested may not be offered, sold, transferred, assigned, pledged, hypothecated, encumbered or otherwise disposed of (whether by operation of law or otherwise) by the Holder or be subject to execution, attachment or similar process other than by will, the laws of descent and distribution or pursuant to beneficiary designation procedures approved by the Company. Any attempt to so sell, transfer, assign, pledge, hypothecate, encumber or otherwise dispose of such shares shall be null and void.

6.2.Investment Representation. The Holder hereby represents and covenants that (a) any share of Stock acquired upon the vesting of the Award will be acquired for investment and not with a view to the distribution thereof within the meaning of the Securities Act, unless such acquisition has been registered under the Securities Act and any applicable state

6

securities laws; (b) any subsequent sale of any such shares shall be made either pursuant to an effective registration statement under the Securities Act and any applicable state securities laws, or pursuant to an exemption from registration under the Securities Act and such state securities laws; and (c) if requested by the Company, the Holder shall submit a written statement, in form satisfactory to the Company, to the effect that such representation (x) is true and correct as of the date of vesting of any shares of Stock hereunder or (y) is true and correct as of the date of any sale of any such share, as applicable. As a further condition precedent to the delivery to the Holder of any shares of Stock subject to the Award, the Holder shall comply with all regulations and requirements of any regulatory authority having control of or supervision over the issuance or delivery of the shares and, in connection therewith, shall execute any documents which the Board shall in its sole discretion deem necessary or advisable.

6.3.Legends. The Holder understands and agrees that the Company shall cause the legends set forth below or legends substantially equivalent thereto, to be placed upon any certificate(s) evidencing ownership of the Stock together with any other legends that may be required by the Company or by state or federal securities laws:

THE TRANSFERABILITY OF THIS CERTIFICATE AND THE SHARES OF STOCK REPRESENTED HEREBY ARE SUBJECT TO THE TERMS AND CONDITIONS (INCLUDING FORFEITURE) OF A RESTRICTED STOCK AGREEMENT ENTERED INTO BETWEEN THE REGISTERED OWNER AND CDW CORPORATION. A COPY OF SUCH AGREEMENT IS ON FILE IN THE OFFICES OF, AND WILL BE MADE AVAILABLE FOR A PROPER PURPOSE BY, THE CORPORATE SECRETARY OF CDW CORPORATION.

6.4.Stop-Transfer Notices. The Holder agrees that in order to ensure compliance with the restrictions referred to herein, the Company may issue appropriate “stop transfer” instructions to its transfer agent, if any, and that, if the Company transfers its own securities, it may make appropriate notations to the same effect in its own records.

6.5.Refusal to Transfer. The Company shall not be required (i) to transfer on its books any shares of Stock that have been sold or otherwise transferred in violation of any of the provisions of this Agreement or (ii) to treat as owner of such Stock or to accord the right to vote or pay dividends to any purchaser or other transferee to whom such shares of Stock shall have been so transferred.

7.Noncompete, Nonsolicitation and Confidentiality. The Holder acknowledges that (i) in connection with and as a condition to the Holder’s prior grant of the unvested Class B Units which are being exchanged by the Company with this Award, the Holder agreed to abide by certain restrictive covenants which are being reaffirmed herein, (ii) in the course of his or her employment with or provision of services to the Company or its Subsidiaries, the Holder has and will become familiar with trade secrets and other confidential information concerning the Company and its Subsidiaries and (iii) the Holder’s services will be of special, unique and extraordinary value to the Company and its Subsidiaries. The Holder also acknowledges that the Company’s Confidential Information (as this and other terms used herein are defined below) will retain continuing vitality throughout and beyond the Noncompetition Period, and that should the Holder leave the Company and work for a Competitor during the Noncompetition Period, it would be highly

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likely, if not inevitable, that the Holder would use or disclose the Company’s Confidential Information. For these and other reasons, the Holder agrees and acknowledges thatthe restrictions in thisAgreement are reasonable and necessary to protect the Company’s legitimate business interests.

7.1.Noncompete. In consideration for the issuance of the Award and other good and valuable consideration, the Holder agrees not to become employed by, perform services for, form, develop, or otherwise become associated with (as an employee, officer, director, manager, partner or consultant or member, stockholder or investor owning more than a 2% interest or other similar role) a Competitor of the Company or any of its Subsidiaries at any time during the Holder's employment with or service to the Company or any of its Subsidiaries or for eighteen months after the termination of the Holder's employment with or service to the Company or any of its Subsidiaries (the "Noncompetition Period"). For purposes of this Section 7, "Competitor" shall mean any Person conducting or planning to conduct a business similar to and in competition with any business conducted or planned by the Company or any of its Subsidiaries in any geographic area in which the Company or any of its Subsidiaries is conducting such business or plans to conduct such business as of the date of termination of the Holder's employment with or services to the Company or its Subsidiaries, if the Holder, while employed by or providing services to the Company or any of its Subsidiaries, was involved in such business or had knowledge of the operations of such business or received or was otherwise in possession of Confidential Information as defined in Section 7.6 regarding such business. For purposes of illustration only, the parties agree that each of the corporations, other enterprises or Persons set forth on Schedule I attached hereto is a "Competitor" of the Company and its Subsidiaries as of the date hereof, it being acknowledged and agreed that (x) such list is only representative of the Company’s current Competitors but not exhaustive and is not intended to include all of the Company’s or its Subsidiaries’ current Competitors and (y) other Persons could become Competitors of the Company or its Subsidiaries at a future date.

7.2.Nonsolicitation. The Holder further agrees that during the Noncompetition Period the Holder shall not (i) in any manner, directly or indirectly, solicit any CDW Employee or induce or attempt to induce any CDW Employee to terminate or abandon his or her employment for any purpose whatsoever or (ii) on behalf of any Competitor, call on, service, solicit or otherwise do business with any CDW Vendor or CDW Customer.

7.3.Exceptions. Nothing in this Section 7 shall prohibit the Holder from being (i) a stockholder in a mutual fund or a diversified investment company or (ii) an owner of not more than two percent of the outstanding stock of any class of a corporation, any securities of which are publicly traded, so long as the Holder has no active participation in the business of such corporation.

7.4.Extension. Because the protection of the Company’s Confidential Information requires that the Holder not perform the activities described in Sections 7.1 and 7.2 for the full Noncompetition Period, the Holder agrees that the Noncompetition Period provided in Section 7 shall be extended for any time during which the Holder breaches this Agreement,

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such that the Holder does not perform the proscribed activities for a time period equal to the full amount of time provided in Section 7.

7.5.Reformation. If, at any time of enforcement of this Section 7, a court or an arbitrator holds that the restrictions stated herein are unreasonable under circumstances then existing, the parties hereto agree that the maximum period, scope or geographical area reasonable under such circumstances shall be substituted for the stated period, scope or area and that the court or arbitrator shall be allowed to revise the restrictions contained herein to cover the maximum period, scope and area permitted by law. This Agreement shall not authorize a court or arbitrator to increase or broaden any of the restrictions in this Section 7.

7.6.Confidentiality. Other than as required in the ordinary course of the Holder's employment by the Company or its Subsidiaries, and except as specifically authorized by the Board or the Holder's direct supervisor, the Holder shall not at any time make use of or disclose, directly or indirectly, any (i) trade secret or other confidential or secret information of the Company or of any of its Subsidiaries or (ii) other technical, business, proprietary or financial information of the Company or of any of its Subsidiaries not available to the public generally or to Competitors ("Confidential Information"), except to the extent that such Confidential Information (a) becomes a matter of public record or is published in a newspaper, magazine or other periodical or on electronic or other media available to the general public, other than as a result of any act or omission by the Holder or (b) is required to be disclosed by any law, regulation or order of any court or regulatory commission, department or agency, provided that the Holder gives prompt notice of such requirement to the Company to enable the Company to seek an appropriate protective order. Promptly following the termination of the Holder's employment or service with the Company or any of its Subsidiaries, the Holder shall surrender to the Company all records, memoranda, notes, plans, reports, computer tapes and software and other documents and data which constitute Confidential Information which the Holder may then possess or have under his/her control (together with all copies thereof).

7.7.Acknowledgements. The Holder acknowledges that the provisions of this Section 7 are in addition to, and not in limitation of, any obligation of the Holder under the terms of any employment or other agreement with the Company or any Subsidiary, and in consideration of (i) employment by the Company or its Subsidiaries or retention to provide services to the Company and its Subsidiaries and (ii) additional good and valuable consideration as set forth in this Agreement. In addition, the Holder agrees and acknowledges that the restrictions contained in this Section 7 do not preclude the Holder from earning a livelihood, nor do they unreasonably impose limitations on the Holder’s ability to earn a living. In addition, the Holder acknowledges (i) that the business of the Company or its Subsidiaries will be conducted throughout the United States, (ii) notwithstanding the state of incorporation or principal office of the Company or its Subsidiaries, or any of their respective executives or employees (including the Holder), it is expected that the Company or its Subsidiaries will have business activities and have valuable business relationships within its industry throughout the United States, and (iii) as part of the Holder's responsibilities, the Holder will be conducting business throughout the United States in furtherance of the Company's business and its relationships. The Holder agrees and acknowledges that the potential harm to the Company and its Subsidiaries of the non-

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enforcement of this Section 7 outweighs any potential harm to the Holder of its enforcement by injunction or otherwise. The Holder acknowledges that the Holder has carefully read this Agreement and has given careful consideration to the restraints imposed upon the Holder by this Agreement, and is in full accord as to their necessity for the reasonable and proper protection of confidential and proprietary information of the Company, its Subsidiaries and affiliates now existing or to be developed in the future. The Holder expressly acknowledges and agrees that each and every restraint imposed by this Agreement is reasonable with respect to subject matter, time period and geographical scope.

7.8.Definitions. For purposes of this Section 7 the following terms shall have the following meanings:

(a)“CDW Customer” means (i) any person or entity that purchased any products or services from the Companyor any of its Subsidiariesor affiliates at any time within a two year period prior to the Holder’s termination (for whatever reason) from the Company or (ii) any person or entity with respect to whom, at any time during the one year period prior to the Holder’s termination (for whatever reason) from the Company, the Holder submitted or assisted in the development or submission of a presentation or proposal of any kind on behalf of the Company or any of its Subsidiaries or affiliates, acquired or had access to any Confidential Information or had contact with as a result of the Holder’s employment with the Company.

(b)“CDW Employee” means any person who was an officer, manager-level or other key employee or any material group of employees of the Company or any of its Subsidiaries or affiliates either (i) at any time within three months of the prohibited contact; or (ii) at any time within three months of the Holder’s termination (for whatever reason) from the Company.

(c)“CDW Vendor” means any person or entity that provided goods or services to the Company or any of its Subsidiaries or otherwise did business with the Company or any of its Subsidiaries at any time within a two-year period prior to the Holder’s termination (for whatever reason) from the Company.

(d)“Person” means any individual, partnership, corporation, association, joint stock company, trust, joint venture, limited liability company, unincorporated organization, governmental entity or department, agency or political subdivision thereof.

7.9.Remedies. The parties hereto shall be entitled to enforce their respective rights under this Agreement specifically, to recover damages by reason of any breach of any provision of this Agreement, and to exercise all other rights existing in their favor. The parties hereto acknowledge and agree that money damages would not be an adequate remedy for any breach of the provisions of this Agreement and that any party hereto may, in their sole discretion, apply to any court of law or equity of competent jurisdiction for specific performance and/or injunctive relief (without posting bond or other security) in order to enforce or prevent any violation of the provisions of this Agreement.

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8.Additional Terms and Conditions of Award.

8.1.Withholding Taxes. (a) As a condition precedent to the delivery of the Stock at such time as required by Section 8.8, the Holder shall, upon request by the Company, pay to the Company such amount as the Company or an affiliate may be required, under all applicable federal, state, local, foreign or other laws or regulations, to withhold and pay over as income or other withholding taxes (the “Required Tax Payments”) with respect to the Award. If the Holder shall fail to advance the Required Tax Payments after request by the Company, the Company or an affiliate may, in its discretion, deduct any Required Tax Payments from any amount then or thereafter payable by the Company or an affiliate to the Holder.

(b)    The Holder may elect to satisfy his or her obligation to advance the Required Tax Payments by any of the following means: (1) a cash payment to the Company, (2) to the extent permitted by the Committee, delivery to the Company (either actual delivery or by attestation procedures established by the Company) of previously owned whole shares of Stock having an aggregate Fair Market Value, determined as of the date on which such withholding obligation arises (the “Tax Date”), equal to the Required Tax Payments, (3) to the extent permitted by the Committee, authorizing the Company to withhold whole shares of Stock which would otherwise be delivered to the Holder having an aggregate Fair Market Value, determined as of the Tax Date, equal to the Required Tax Payments or (4) any combination of (1), (2) and (3). Shares of Stock to be delivered or withheld may not have a Fair Market Value in excess of the minimum amount of the Required Tax Payments; provided, however, that if a fraction of a share of Stock would be required to satisfy the minimum amount of the Required Tax Payments, then the number of shares of Stock to be delivered or withheld may be rounded up to the next nearest whole share of Stock. No share of Stock or certificate representing a share of Stock shall be delivered until the Required Tax Payments have been satisfied in full.

8.2.Adjustment. In the event of any equity restructuring (within the meaning of Financial Accounting Standards Board Accounting Standards Codification Topic 718, Compensation—Stock Compensation) that causes the per share value of shares of Stock to change, such as a stock dividend, stock split, spinoff, rights offering or recapitalization through an extraordinary dividend, the terms of this Award, including the number and class of securities subject hereto, shall be appropriately adjusted by the Committee. In the event of any other change in corporate capitalization, including a merger, consolidation, reorganization, or partial or complete liquidation of the Company, such equitable adjustments described in the foregoing sentence may be made as determined to be appropriate and equitable by the Committee to prevent dilution or enlargement of rights of the Holder. The decision of the Committee regarding any such adjustment shall be final, binding and conclusive.

8.3.Compliance with Applicable Law. The Award is subject to the condition that if the listing, registration or qualification of the shares of Stock subject to the Award upon any securities exchange or under any law, or the consent or approval of any governmental body, or the taking of any other action is necessary or desirable as a condition of, or in connection with, the vesting or delivery of shares hereunder, the shares of Stock subject to the Award shall not vest or be delivered, in whole or in part, unless such listing, registration, qualification, consent,

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approval or other action shall have been effected or obtained, free of any conditions not acceptable to the Company. The Company agrees to use reasonable efforts to effect or obtain any such listing, registration, qualification, consent, approval or other action.

8.4.Delivery of Stock. Subject to Section 8.1, upon the vesting of the Award, in whole or in part, the Company shall deliver or cause to be delivered to the Holder the vested shares of Stock in accordance with Section 3. The Company shall pay all original issue or transfer taxes and all fees and expenses incident to such delivery, except as otherwise provided in Section 8.1.

8.5.Award Confers No Rights to Continued Employment. In no event shall the granting of the Award or its acceptance by the Holder, or any provision of the Agreement or the Plan, give or be deemed to give the Holder any right to continued employment by the Company, any Subsidiary or any affiliate of the Company or affect in any manner the right of the Company, any Subsidiary or any affiliate of the Company to terminate the employment of any person at any time.

8.6.Decisions of Board or Committee. The Board or the Committee shall have the right to resolve all questions which may arise in connection with the Award. Any interpretation, determination or other action made or taken by the Board or the Committee regarding the Plan or this Agreement shall be final, binding and conclusive.

8.7.Successors. This Agreement shall be binding upon and inure to the benefit of any successor or successors of the Company and any person or persons who shall, upon the death of the Holder, acquire any rights hereunder in accordance with this Agreement or the Plan.

8.8.Taxation; Section 83(b) Election. The Holder understands that the Holder is solely responsible for all tax consequences to the Holder in connection with this Award. The Holder represents that the Holder has consulted with any tax consultants the Holder deems advisable in connection with the Award and that the Holder is not relying on the Company for any tax advice. By accepting this Agreement, the Holder agrees that the Holder shall make an effective election with the Internal Revenue Service under Section 83(b) of the Internal Revenue Code of 1986, as amended, and the regulations promulgated thereunder, in the form of Exhibit A attached hereto, to include in the Holder’s gross income the excess, if any, of the Fair Market Value of the unvested shares of Stock subject to the Award as of such date over the Fair Market Value of the Class B Units exchanged for such shares of Stock. The Holder further agrees to deliver the executed Section 83(b) election to the Company for filing with the Internal Revenue Service within five days following the date hereof.

8.9.Notices. All notices, requests or other communications provided for in this Agreement shall be made, if to the Company, to CDW Corporation, Attn: Treasury Department, 200 N. Milwaukee Avenue, Vernon Hills, Illinois 60061, and if to the Holder, to the last known mailing address of the Holder contained in the records of the Company. All notices, requests or other communications provided for in this Agreement shall be made in writing either (a) by personal delivery, (b) by facsimile or electronic mail with confirmation of receipt, (c) by

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mailing in the United States mails or (d) by express courier service. The notice, request or other communication shall be deemed to be received upon personal delivery, upon confirmation of receipt of facsimile or electronic mail transmission or upon receipt by the party entitled thereto if by United States mail or express courier service; provided, however, that if a notice, request or other communication sent to the Company is not received during regular business hours, it shall be deemed to be received on the next succeeding business day of the Company.

8.10.Governing Law. This Agreement, the Award and all determinations made and actions taken pursuant hereto and thereto, to the extent not governed by the laws of the United States, shall be governed by the laws of the State of Delaware and construed in accordance therewith without giving effect to principles of conflicts of laws.

8.11.Agreement Subject to the Plan. This Agreement is subject to the provisions of the Plan and shall be interpreted in accordance therewith. In the event that the provisions of this Agreement and the Plan conflict, the Plan shall control. The Holder hereby acknowledges receipt of a copy of the Plan.

8.12.Entire Agreement. This Agreement and the Plan constitute the entire agreement of the parties with respect to the shares of Stock subject to this Award and supersede in their entirety all prior undertakings and agreements of the Company and the Holder with respect to such shares of Stock, and may not be modified adversely to the Holder’s interest except by means of a writing signed by the Company and the Holder. Notwithstanding anything herein to the contrary, this Agreement does not supersede the Class B Common Unit Grant Agreement between the Holder and CDW Holdings LLC with respect to the Class B Units that vested prior to the IPO in accordance with the terms of such Class B Common Unit Grant Agreement.

8.13.Partial Invalidity. The invalidity or unenforceability of any particular provision of this Agreement shall not affect the other provisions hereof and this Agreement shall be construed in all respects as if such invalid or unenforceable provision was omitted.

8.14.Amendment and Waiver. The provisions of this Agreement may be amended or waived only by the written agreement of the Company and the Holder, and no course of conduct or failure or delay in enforcing the provisions of this Agreement shall affect the validity, binding effect or enforceability of this Agreement.

8.15.Counterparts. The Award Notice may be executed in two counterparts, each of which shall be deemed an original and both of which together shall constitute one and the same instrument.

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EXHIBIT A

ELECTION TO INCLUDE VALUE OF RESTRICTED PROPERTY
IN GROSS INCOME

IN YEAR OF TRANSFER UNDER CODE SECTION 83(b)

The undersigned hereby elects pursuant to Section 83(b) of the Internal Revenue Code of 1986, as amended (the “Code”), to include the value of the property described below in gross income in the year of transfer and supplies the following information in accordance with the regulations promulgated thereunder:

1. The name, address and social security number of the undersigned:

[Name]
[Address]
[Social Security Number]

2. A description of the property with respect to which the election is being made: __________ shares of Common Stock, par value $0.01per share, of CDW Corporation, a Delaware corporation, granted to the undersigned as restricted stock.

3. The date on which the property was transferred: ______ __, 20__. The taxable year for which such election is made: calendar 20__.

4. The restrictions to which the property is subject: If the employment of the undersigned terminates prior to specified dates, the undersigned will forfeit the property transferred to the undersigned.

5. The fair market value on _____________, 20__ of the property with respect to which the election is being made: $_____ per share.

The amount paid for such property: $_____ per share.

*    *    *    *    *

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A copy of this election has been furnished to the Secretary of the Company pursuant to Treasury Regulations §1.83‑2(d).

Dated: _______________, 20____ [Name]

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EX-10.13

CDW CORPORATION

2013 LONG-TERM INCENTIVE PLAN

Restricted Stock Award Notice

[Name of Holder]

You have been awarded shares of restricted stock of CDW Corporation (the “Company”) pursuant to the terms and conditions of the CDW Corporation 2013 Long-Term Incentive Plan (the “Plan”) and the Restricted Stock Award Agreement (together with this Award Notice, the “Agreement”). This Award is granted in exchange for the unvested Class B Units held by the Holder in CDW Holdings LLC pursuant to Section 14.1 of the CDW Holdings LLC Amended and Restated Limited Liability Company Agreement, dated as of March 10, 2010. Copies of the Plan and the Restricted Stock Award Agreement are attached hereto. Capitalized terms not defined herein shall have the meanings specified in the Plan or the Agreement.

Restricted Stock: You have been awarded [____] restricted shares of Common Stock, par value $0.01per share, subject to adjustment as provided in Section 8.2 of the Agreement.

Grant Date: [_____________]

Vesting Schedule: Except as otherwise provided in the Plan, the Agreement or any other agreement between the Company or any of its Subsidiaries and Holder, and subject to the forfeiture condition in Section 1 of the Agreement, the Award shall vest daily on a pro rata basis commencing on the Grant Date and continuing through [____________] if, and only if, Holder is, and has been, continuously (except for any absence for vacation, leave, etc. in accordance with the Company's or its Subsidiaries' policies): (i) employed by the Company or any of its Subsidiaries, (ii) serving as a Non-Employee Director or (iii) providing services to the Company or any of its Subsidiaries as an advisor or consultant, in each case, from the date of this Agreement through and including such date.

CDW CORPORATION

By: ______________________________

Name: Thomas E. Richards

Title: Chairman and Chief Executive Officer

Acknowledgment, Acceptance and Agreement:

By signing below and returning this Award Notice to CDW Corporation, I hereby acknowledge receipt of the Agreement and the Plan, accept the Award granted to me and agree to be bound by the terms and conditions of this Award Notice, the Agreement and the Plan.

______________________________

Holder                

______________________________

Date

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CDW CORPORATION

2013 LONG-TERM INCENTIVE PLANRESTRICTED STOCK AWARD AGREEMENT

CDW Corporation, a Delaware corporation (the “Company”), hereby grants to the individual (the “Holder”) named in the award notice attached hereto (the “Award Notice”) as of the date set forth in the Award Notice (the “Grant Date”), pursuant to the provisions of the CDW Corporation 2013 Long-Term Incentive Plan (the “Plan”), a restricted stock award (the “Award”) for the number of shares of the Company’s Common Stock, par value $0.01per share (“Stock”) set forth in the Award Notice, upon and subject to the restrictions, terms and conditions set forth in the Plan and this agreement (the “Agreement”). This Award is granted in exchange for the unvested Class B Units held by the Holder in CDW Holdings LLC, a Delaware limited liability company (“CDW Holdings”), pursuant to Section 14.1 of the CDW Holdings LLC Amended and Restated Limited Liability Company Agreement, dated as of March 10, 2010. Capitalized terms not defined herein shall have the meanings specified in the Plan.

1.Award Subject to Acceptance of Agreement. The Award shall be null and void unless the Holder (a) accepts this Agreement by executing the Award Notice in the space provided therefor and returning an original execution copy of the Award Notice to the Company (or electronically accepts this Agreement within the Holder’s stock plan account with the Company’s stock plan administrator according to the procedures then in effect), (b) if required by the Company, executes and returns one or more irrevocable stock powers to facilitate the transfer to the Company (or its assignee or nominee) of all or a portion of the shares of Stock subject to the Award if any shares of Stock are forfeited pursuant to Section 4 or if required under applicable laws or regulations and (c) agrees to abide by all administrative procedures established by the Company or its stock plan administrator, including any procedures requiring the Holder to notify the Company of any proposed sale of any Stock acquired upon the vesting of this Award. As soon as practicable after the Holder has executed such documents and returned them to the Company, the Company shall cause to be issued in the Holder’s name the total number of shares of Stock subject to the Award. In addition, in the event that the Company’s initial public offering of the Stock (the “IPO”) does not close on or before August 31, 2013, this Award shall be forfeited as of such date and, consistent with the documents being executed by the Holder in connection with the Distribution (as defined below), the Holder will at such time continue to hold the unvested Class B Units held by the Holder in CDW Holdings for which the shares of Stock received hereunder were exchanged. For purposes of this Agreement, “Distribution” shall mean the distribution of shares of Stock by CDW Holdings to its members immediately prior to the pricing of the IPO.

2.Rights as a Stockholder. Except as otherwise provided in this Agreement, the Holder shall have all rights as a holder of the Stock subject to the Award, including, without limitation, the right to receive dividends and other distributions thereon, and the right to participate in any capital adjustment applicable to all holders of Stock unless and until such shares are forfeited pursuant to Section 4 hereof;provided, however, that (i) the Holder shall not

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be entitled to vote the shares of Stock subject to the Award until such shares become vested pursuant to Section 4.1 and (ii) each distribution with respect to shares of Stock that is a stock dividend or stock split, shall be delivered to the Company (and the Holder shall, if requested by the Company, execute and return one or more irrevocable stock powers related thereto) and shall be subject to the same restrictions as the shares of Stock with respect to which such dividend or other distribution was made.

3.Custody and Delivery of Shares. The shares of Stock subject to the Award shall be held by the Company or by a custodian in book entry form, with restrictions on the shares of Stock duly noted, until such Award shall have vested, in whole or in part, pursuant to Section 4 hereof. Alternatively, in the sole discretion of the Company, the Company shall hold a certificate or certificates representing the shares of Stock subject to the Award until such Award shall have vested, in whole or in part, pursuant to Section 4 hereof. After all or any portion of the Award shall have vested pursuant to Section 4 hereof, the Company shall, subject to Section 8.1 hereof, transfer the vested shares of Stock on its books or deliver the certificate or certificates for the vested shares of Stock, as applicable, to a brokerage account in the name of the Holder, which transfer to the brokerage account shall occur (i) as soon as administratively practicable after the Company receives a request for such transfer from the Holder (but in no event later than 30 days after such request) or (ii) in the absence of such request from the Holder, automatically as soon as administratively practicable after the last day of each calendar month after the Grant Date, subject to such other procedures and restrictions that the Company may determine are necessary or appropriate to comply with Rule 144 of the Securities Act of 1933, as amended (the “Securities Act”), or any resale restrictions to which the Holder is subject. If the Company delivers certificate(s) for the vested shares of Stock pursuant to the foregoing sentence, the Company shall also destroy the stock power or powers relating to such vested Stock delivered by the Holder pursuant to Section 1 hereof; provided that, if such stock power or powers also relate to unvested Stock, the Company may require, as a condition precedent to delivery of any certificate pursuant to this Section 3, the execution and delivery to the Company of one or more stock powers relating to such unvested Stock.

4.Restriction Period and Vesting.

4.1.Service-Based Vesting Condition. Except as otherwise provided in this Section 4, the Award shall vest in accordance with the vesting schedule set forth in the Award Notice if, and only if, the Holder is, and has been, continuously (except for any absence for vacation, leave, etc. in accordance with the Company's or its Subsidiaries' policies): (i) employed by the Company or any of its Subsidiaries, (ii) serving as a Non-Employee Director or (iii) providing services to the Company or any of its Subsidiaries as an advisor or consultant, in each case, from the date of this Agreement through and including such date. The period of time prior to the vesting shall be referred to herein as the “Restriction Period.”

4.2.Termination of Employment due to Death or Disability. If the Holder’s employment with the Company terminates prior to the end of the Restriction Period by reason of the Holder’s death or Disability, then in either such case the Award shall become vested as of the date of termination with respect to a number of additional shares of Stock that would have

4

become vested during the one-year period following the date of such termination if the Holder’s employment with the Company had continued through such date and the remainder of the Award that was not vested immediately prior to Holder’s death or termination due to Disability and which did not otherwise become vested pursuant to this Section 4.2 shall be immediately forfeited by the Holder and cancelled by the Company. For purposes of this Award, “Disability” shall have the meaning set forth in the employment agreement, if any, between the Holder and the Company or any of its Subsidiaries, provided that if Holder is not a party to an employment agreement that contains such definition, then “Disability” shall mean Holder’s inability, due to illness, accident, injury, physical or mental incapacity or other disability, to carry out effectively Holder’s duties and obligations to the Company or any of its Subsidiaries or, if applicable based on Holder’s position, to participate effectively and actively in the management of the Company or any of its Subsidiaries for a period of at least 90 consecutive days or for shorter periods aggregating at least 120 days (whether or not consecutive) during any twelve month period, as determined in the reasonable judgment of the Board. A Disability shall be deemed to have occurred on the date that either Holder or Holder’s personal representative or legal guardian, on the one hand, or the Company, on the other hand, provides notice to the other party of the satisfaction of each of the requirements to constitute a Disability set forth above or on such other date as the parties shall mutually agree.

4.3.Termination by the Company Other than for Death or Disability or by the Holder. If the Holder’s employment with the Company terminates prior to the end of the Restriction Period (i) by the Company for any reason (other than by reason of the Holder’s death or Disability) or (ii) by the Holder by reason of the Holder’s resignation from employment for any reason, then the portion of the Award that was not vested immediately prior to such termination of employment shall be immediately forfeited by the Holder and cancelled by the Company.

4.4.Change in Control. In the event of a Change in Control, the shares of Stock subject to Award that were not vested immediately prior to such Change in Control shall become fully vested.

5.Clawback of Proceeds.

5.1.Clawback of Proceeds. Ifthe Holder violates any agreement between the Holder and the Company or its Subsidiaries with respect to non-competition, non-solicitation, confidentiality or protection of trade secrets (or similar provision regarding intellectual property), including Section 7 of this Agreement: (i) the restricted shares of Stock subject to the Award shall be forfeited and (ii) the Holder shall immediately remit a cash payment to the Company equal to (x) the Fair Market Value of a share of Common Stock on the date on which the Company first became aware of such violation or the date of Holder’s termination of employment, whichever is greater, multiplied by (y) the number of shares of Common Stock that became vested pursuant to Section 4.1 of this Agreement. The remedy provided by this Section 5 shall terminate at such time as the Institutional Investors (as defined below) collectively hold less than 10% of the number of shares of Stock held by the Institutional Investors as a result of the Distribution. In addition, the remedy provided by this Section 5

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shall be in addition to and not in lieu of any rights or remedies which the Company may have against the Holder in respect of a breach by the Holder of any duty or obligation to the Company.

5.2.Right of Setoff. The Holder agrees that by accepting the Award Notice the Holder authorizes the Company and its affiliates to deduct any amount or amounts owed by the Holder pursuant to this Section 5 from any amounts payable by or on behalf of the Company or any affiliate to the Holder, including, without limitation, any amount payable to the Holder as salary, wages, vacation pay, bonus or the settlement of the Award or any stock-based award. This right of setoff shall not be an exclusive remedy and the Company’s or an affiliate’s election not to exercise this right of setoff with respect to any amount payable to the Holder shall not constitute a waiver of this right of setoff with respect to any other amount payable to the Holder or any other remedy. By the Holder’s signature, this agreement constitutes the Holder’s written authorization for the Company or any of its affiliates to make such deductions from wages.

5.3.Definitions. For purposes of this Section 5, the following terms shall have the following meanings:

(a)“Competitive Activity” means Holder becoming employed by, performing services for, or otherwise becoming associated with (as an employee, officer, director, manager, partner or consultant or member, stockholder or investor owning more than a 2% interest or other similar role) a Competitor (as defined below) of the Company.

(b)“Institutional Investors” means, collectively, Madison Dearborn Capital Partners V‑A, L.P., a Delaware limited partnership, Madison Dearborn Capital Partners V‑C, L.P., a Delaware limited partnership, Madison Dearborn Capital Partners V Executive‑A, L.P., a Delaware limited partnership, Providence Equity Partners VI L.P., a Delaware limited partnership, and Providence Equity Partners VI‑A L.P., a Delaware limited partnership.

6.Transfer Restrictions and Investment Representation.

6.1.Nontransferability of Award. During the Restriction Period, the shares of Stock subject to the Award and not then vested may not be offered, sold, transferred, assigned, pledged, hypothecated, encumbered or otherwise disposed of (whether by operation of law or otherwise) by the Holder or be subject to execution, attachment or similar process other than by will, the laws of descent and distribution or pursuant to beneficiary designation procedures approved by the Company. Any attempt to so sell, transfer, assign, pledge, hypothecate, encumber or otherwise dispose of such shares shall be null and void.

6.2.Investment Representation. The Holder hereby represents and covenants that (a) any share of Stock acquired upon the vesting of the Award will be acquired for investment and not with a view to the distribution thereof within the meaning of the Securities Act, unless such acquisition has been registered under the Securities Act and any applicable state securities laws; (b) any subsequent sale of any such shares shall be made either pursuant to an effective registration statement under the Securities Act and any applicable state securities laws,

6

or pursuant to an exemption from registration under the Securities Act and such state securities laws; and (c) if requested by the Company, the Holder shall submit a written statement, in form satisfactory to the Company, to the effect that such representation (x) is true and correct as of the date of vesting of any shares of Stock hereunder or (y) is true and correct as of the date of any sale of any such share, as applicable. As a further condition precedent to the delivery to the Holder of any shares of Stock subject to the Award, the Holder shall comply with all regulations and requirements of any regulatory authority having control of or supervision over the issuance or delivery of the shares and, in connection therewith, shall execute any documents which the Board shall in its sole discretion deem necessary or advisable.

6.3.Legends. The Holder understands and agrees that the Company shall cause the legends set forth below or legends substantially equivalent thereto, to be placed upon any certificate(s) evidencing ownership of the Stock together with any other legends that may be required by the Company or by state or federal securities laws:

THE TRANSFERABILITY OF THIS CERTIFICATE AND THE SHARES OF STOCK REPRESENTED HEREBY ARE SUBJECT TO THE TERMS AND CONDITIONS (INCLUDING FORFEITURE) OF A RESTRICTED STOCK AGREEMENT ENTERED INTO BETWEEN THE REGISTERED OWNER AND CDW CORPORATION. A COPY OF SUCH AGREEMENT IS ON FILE IN THE OFFICES OF, AND WILL BE MADE AVAILABLE FOR A PROPER PURPOSE BY, THE CORPORATE SECRETARY OF CDW CORPORATION.

6.4.Stop-Transfer Notices. The Holder agrees that in order to ensure compliance with the restrictions referred to herein, the Company may issue appropriate “stop transfer” instructions to its transfer agent, if any, and that, if the Company transfers its own securities, it may make appropriate notations to the same effect in its own records.

6.5.Refusal to Transfer. The Company shall not be required (i) to transfer on its books any shares of Stock that have been sold or otherwise transferred in violation of any of the provisions of this Agreement or (ii) to treat as owner of such Stock or to accord the right to vote or pay dividends to any purchaser or other transferee to whom such shares of Stock shall have been so transferred.

7.Noncompete, Nonsolicitation and Confidentiality. The Holder acknowledges that (i) in connection with and as a condition to the Holder’s prior grant of the unvested Class B Units which are being exchanged by the Company with this Award, the Holder agreed to abide by certain restrictive covenants which are being reaffirmed herein, (ii) in the course of his or her employment with or provision of services to the Company or its Subsidiaries, the Holder has and will become familiar with trade secrets and other confidential information concerning the Company and its Subsidiaries and (iii) the Holder’s services will be of special, unique and extraordinary value to the Company and its Subsidiaries. The Holder also acknowledges that the Company’s Confidential Information (as this and other terms used herein are defined below) will retain continuing vitality throughout and beyond the Noncompetition Period, and that should the Holder leave the Company and work for a Competitor during the Noncompetition Period, it would be highly likely, if not inevitable, that the Holder would use or disclose the Company’s Confidential Information. For these and other reasons, the Holder agrees and acknowledges thatthe restrictions

7

in thisAgreement are reasonable and necessary to protect the Company’s legitimate business interests.

7.1.Noncompete. In consideration for the issuance of the Award and other good and valuable consideration, the Holder agrees not to become employed by, perform services for, form, develop, or otherwise become associated with (as an employee, officer, director, manager, partner or consultant or member, stockholder or investor owning more than a 2% interest or other similar role) a Competitor of the Company or any of its Subsidiaries at any time during the Holder's employment with or service to the Company or any of its Subsidiaries or for twelve months after the termination of the Holder's employment with or service to the Company or any of its Subsidiaries (the "Noncompetition Period"). For purposes of this Section 7, "Competitor" shall mean any Person conducting or planning to conduct a business similar to and in competition with any business conducted or planned by the Company or any of its Subsidiaries in any geographic area in which the Company or any of its Subsidiaries is conducting such business or plans to conduct such business as of the date of termination of the Holder's employment with or services to the Company or its Subsidiaries, if the Holder, while employed by or providing services to the Company or any of its Subsidiaries, was involved in such business or had knowledge of the operations of such business or received or was otherwise in possession of Confidential Information as defined in Section 7.6 regarding such business. For purposes of illustration only, the parties agree that each of the corporations, other enterprises or Persons set forth on Schedule I attached hereto is a "Competitor" of the Company and its Subsidiaries as of the date hereof, it being acknowledged and agreed that (x) such list is only representative of the Company’s current Competitors but not exhaustive and is not intended to include all of the Company’s or its Subsidiaries’ current Competitors and (y) other Persons could become Competitors of the Company or its Subsidiaries at a future date.

7.2.Nonsolicitation. The Holder further agrees that during the Noncompetition Period the Holder shall not (i) in any manner, directly or indirectly, solicit any CDW Employee or induce or attempt to induce any CDW Employee to terminate or abandon his or her employment for any purpose whatsoever or (ii) on behalf of any Competitor, call on, service, solicit or otherwise do business with any CDW Vendor or CDW Customer.

7.3.Exceptions. Nothing in this Section 7 shall prohibit the Holder from being (i) a stockholder in a mutual fund or a diversified investment company or (ii) an owner of not more than two percent of the outstanding stock of any class of a corporation, any securities of which are publicly traded, so long as the Holder has no active participation in the business of such corporation.

7.4.Extension. Because the protection of the Company’s Confidential Information requires that the Holder not perform the activities described in Sections 7.1 and 7.2 for the full Noncompetition Period, the Holder agrees that the Noncompetition Period provided in Section 7 shall be extended for any time during which the Holder breaches this Agreement, such that the Holder does not perform the proscribed activities for a time period equal to the full amount of time provided in Section 7.

8

7.5.Reformation. If, at any time of enforcement of this Section 7, a court or an arbitrator holds that the restrictions stated herein are unreasonable under circumstances then existing, the parties hereto agree that the maximum period, scope or geographical area reasonable under such circumstances shall be substituted for the stated period, scope or area and that the court or arbitrator shall be allowed to revise the restrictions contained herein to cover the maximum period, scope and area permitted by law. This Agreement shall not authorize a court or arbitrator to increase or broaden any of the restrictions in this Section 7.

7.6.Confidentiality. Other than as required in the ordinary course of the Holder's employment by the Company or its Subsidiaries, and except as specifically authorized by the Board or the Holder's direct supervisor, the Holder shall not at any time make use of or disclose, directly or indirectly, any (i) trade secret or other confidential or secret information of the Company or of any of its Subsidiaries or (ii) other technical, business, proprietary or financial information of the Company or of any of its Subsidiaries not available to the public generally or to Competitors ("Confidential Information"), except to the extent that such Confidential Information (a) becomes a matter of public record or is published in a newspaper, magazine or other periodical or on electronic or other media available to the general public, other than as a result of any act or omission by the Holder or (b) is required to be disclosed by any law, regulation or order of any court or regulatory commission, department or agency, provided that the Holder gives prompt notice of such requirement to the Company to enable the Company to seek an appropriate protective order. Promptly following the termination of the Holder's employment or service with the Company or any of its Subsidiaries, the Holder shall surrender to the Company all records, memoranda, notes, plans, reports, computer tapes and software and other documents and data which constitute Confidential Information which the Holder may then possess or have under his/her control (together with all copies thereof).

7.7.Acknowledgements. The Holder acknowledges that the provisions of this Section 7 are in addition to, and not in limitation of, any obligation of the Holder under the terms of any employment or other agreement with the Company or any Subsidiary, and in consideration of (i) employment by the Company or its Subsidiaries or retention to provide services to the Company and its Subsidiaries and (ii) additional good and valuable consideration as set forth in this Agreement. In addition, the Holder agrees and acknowledges that the restrictions contained in this Section 7 do not preclude the Holder from earning a livelihood, nor do they unreasonably impose limitations on the Holder’s ability to earn a living. In addition, the Holder acknowledges (i) that the business of the Company or its Subsidiaries will be conducted throughout the United States, (ii) notwithstanding the state of incorporation or principal office of the Company or its Subsidiaries, or any of their respective executives or employees (including the Holder), it is expected that the Company or its Subsidiaries will have business activities and have valuable business relationships within its industry throughout the United States, and (iii) as part of the Holder's responsibilities, the Holder will be conducting business throughout the United States in furtherance of the Company's business and its relationships. The Holder agrees and acknowledges that the potential harm to the Company and its Subsidiaries of the non-enforcement of this Section 7 outweighs any potential harm to the Holder of its enforcement by injunction or otherwise. The Holder acknowledges that the Holder has carefully read this Agreement and has given careful consideration to the restraints imposed upon the Holder by this

9

Agreement, and is in full accord as to their necessity for the reasonable and proper protection of confidential and proprietary information of the Company, its Subsidiaries and affiliates now existing or to be developed in the future. The Holder expressly acknowledges and agrees that each and every restraint imposed by this Agreement is reasonable with respect to subject matter, time period and geographical scope.

7.8.Definitions. For purposes of this Section 7 the following terms shall have the following meanings:

(a)“CDW Customer” means (i) any person or entity that purchased any products or services from the Companyor any of its Subsidiariesor affiliates at any time within a two year period prior to the Holder’s termination (for whatever reason) from the Company or (ii) any person or entity with respect to whom, at any time during the one year period prior to the Holder’s termination (for whatever reason) from the Company, the Holder submitted or assisted in the development or submission of a presentation or proposal of any kind on behalf of the Company or any of its Subsidiaries or affiliates, acquired or had access to any Confidential Information or had contact with as a result of the Holder’s employment with the Company.

(b)“CDW Employee” means any person who was an officer, manager-level or other key employee or any material group of employees of the Company or any of its Subsidiaries or affiliates either (i) at any time within three months of the prohibited contact; or (ii) at any time within three months of the Holder’s termination (for whatever reason) from the Company.

(c)“CDW Vendor” means any person or entity that provided goods or services to the Company or any of its Subsidiaries or otherwise did business with the Company or any of its Subsidiaries at any time within a two-year period prior to the Holder’s termination (for whatever reason) from the Company.

(d)“Person” means any individual, partnership, corporation, association, joint stock company, trust, joint venture, limited liability company, unincorporated organization, governmental entity or department, agency or political subdivision thereof.

7.9.Remedies. The parties hereto shall be entitled to enforce their respective rights under this Agreement specifically, to recover damages by reason of any breach of any provision of this Agreement, and to exercise all other rights existing in their favor. The parties hereto acknowledge and agree that money damages would not be an adequate remedy for any breach of the provisions of this Agreement and that any party hereto may, in their sole discretion, apply to any court of law or equity of competent jurisdiction for specific performance and/or injunctive relief (without posting bond or other security) in order to enforce or prevent any violation of the provisions of this Agreement.

8.Additional Terms and Conditions of Award.

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8.1.Withholding Taxes. (a) As a condition precedent to the delivery of the Stock at such time as required by Section 8.8, the Holder shall, upon request by the Company, pay to the Company such amount as the Company or an affiliate may be required, under all applicable federal, state, local, foreign or other laws or regulations, to withhold and pay over as income or other withholding taxes (the “Required Tax Payments”) with respect to the Award. If the Holder shall fail to advance the Required Tax Payments after request by the Company, the Company or an affiliate may, in its discretion, deduct any Required Tax Payments from any amount then or thereafter payable by the Company or an affiliate to the Holder.

(b)    The Holder may elect to satisfy his or her obligation to advance the Required Tax Payments by any of the following means: (1) a cash payment to the Company, (2) to the extent permitted by the Company (or, if the Holder is subject to Section 16 of the Exchange Act, the Committee), delivery to the Company (either actual delivery or by attestation procedures established by the Company) of previously owned whole shares of Stock having an aggregate Fair Market Value, determined as of the date on which such withholding obligation arises (the “Tax Date”), equal to the Required Tax Payments, (3) to the extent permitted by the Company (or, if the Holder is subject to Section 16 of the Exchange Act, the Committee), authorizing the Company to withhold whole shares of Stock which would otherwise be delivered to the Holder having an aggregate Fair Market Value, determined as of the Tax Date, equal to the Required Tax Payments or (4) any combination of (1), (2) and (3). Shares of Stock to be delivered or withheld may not have a Fair Market Value in excess of the minimum amount of the Required Tax Payments; provided, however, that if a fraction of a share of Stock would be required to satisfy the minimum amount of the Required Tax Payments, then the number of shares of Stock to be delivered or withheld may be rounded up to the next nearest whole share of Stock. No share of Stock or certificate representing a share of Stock shall be delivered until the Required Tax Payments have been satisfied in full.

8.2.Adjustment. In the event of any equity restructuring (within the meaning of Financial Accounting Standards Board Accounting Standards Codification Topic 718, Compensation—Stock Compensation) that causes the per share value of shares of Stock to change, such as a stock dividend, stock split, spinoff, rights offering or recapitalization through an extraordinary dividend, the terms of this Award, including the number and class of securities subject hereto, shall be appropriately adjusted by the Committee. In the event of any other change in corporate capitalization, including a merger, consolidation, reorganization, or partial or complete liquidation of the Company, such equitable adjustments described in the foregoing sentence may be made as determined to be appropriate and equitable by the Committee to prevent dilution or enlargement of rights of the Holder. The decision of the Committee regarding any such adjustment shall be final, binding and conclusive.

8.3.Compliance with Applicable Law. The Award is subject to the condition that if the listing, registration or qualification of the shares of Stock subject to the Award upon any securities exchange or under any law, or the consent or approval of any governmental body, or the taking of any other action is necessary or desirable as a condition of, or in connection with, the vesting or delivery of shares hereunder, the shares of Stock subject to the Award shall not vest or be delivered, in whole or in part, unless such listing, registration, qualification, consent,

11

approval or other action shall have been effected or obtained, free of any conditions not acceptable to the Company. The Company agrees to use reasonable efforts to effect or obtain any such listing, registration, qualification, consent, approval or other action.

8.4.Delivery of Stock. Subject to Section 8.1, upon the vesting of the Award, in whole or in part, the Company shall deliver or cause to be delivered to the Holder the vested shares of Stock in accordance with Section 3. The Company shall pay all original issue or transfer taxes and all fees and expenses incident to such delivery, except as otherwise provided in Section 8.1.

8.5.Award Confers No Rights to Continued Employment. In no event shall the granting of the Award or its acceptance by the Holder, or any provision of the Agreement or the Plan, give or be deemed to give the Holder any right to continued employment by the Company, any Subsidiary or any affiliate of the Company or affect in any manner the right of the Company, any Subsidiary or any affiliate of the Company to terminate the employment of any person at any time.

8.6.Decisions of Board or Committee. The Board or the Committee shall have the right to resolve all questions which may arise in connection with the Award. Any interpretation, determination or other action made or taken by the Board or the Committee regarding the Plan or this Agreement shall be final, binding and conclusive.

8.7.Successors. This Agreement shall be binding upon and inure to the benefit of any successor or successors of the Company and any person or persons who shall, upon the death of the Holder, acquire any rights hereunder in accordance with this Agreement or the Plan.

8.8.Taxation; Section 83(b) Election. The Holder understands that the Holder is solely responsible for all tax consequences to the Holder in connection with this Award. The Holder represents that the Holder has consulted with any tax consultants the Holder deems advisable in connection with the Award and that the Holder is not relying on the Company for any tax advice. By accepting this Agreement, the Holder agrees that the Holder shall make an effective election with the Internal Revenue Service under Section 83(b) of the Internal Revenue Code of 1986, as amended, and the regulations promulgated thereunder, in the form of Exhibit A attached hereto, to include in the Holder’s gross income the excess, if any, of the Fair Market Value of the unvested shares of Stock subject to the Award as of such date over the Fair Market Value of the Class B Units exchanged for such shares of Stock. The Holder further agrees to deliver the executed Section 83(b) election to the Company for filing with the Internal Revenue Service within five days following the date hereof.

8.9.Notices. All notices, requests or other communications provided for in this Agreement shall be made, if to the Company, to CDW Corporation, Attn: Treasury Department, 200 N. Milwaukee Avenue, Vernon Hills, Illinois 60061, and if to the Holder, to the last known mailing address of the Holder contained in the records of the Company. All notices, requests or other communications provided for in this Agreement shall be made in writing either (a) by personal delivery, (b) by facsimile or electronic mail with confirmation of receipt, (c) by

12

mailing in the United States mails or (d) by express courier service. The notice, request or other communication shall be deemed to be received upon personal delivery, upon confirmation of receipt of facsimile or electronic mail transmission or upon receipt by the party entitled thereto if by United States mail or express courier service; provided, however, that if a notice, request or other communication sent to the Company is not received during regular business hours, it shall be deemed to be received on the next succeeding business day of the Company.

8.10.Governing Law. This Agreement, the Award and all determinations made and actions taken pursuant hereto and thereto, to the extent not governed by the laws of the United States, shall be governed by the laws of the State of Delaware and construed in accordance therewith without giving effect to principles of conflicts of laws.

8.11.Agreement Subject to the Plan. This Agreement is subject to the provisions of the Plan and shall be interpreted in accordance therewith. In the event that the provisions of this Agreement and the Plan conflict, the Plan shall control. The Holder hereby acknowledges receipt of a copy of the Plan.

8.12.Entire Agreement. This Agreement and the Plan constitute the entire agreement of the parties with respect to the shares of Stock subject to this Award and supersede in their entirety all prior undertakings and agreements of the Company and the Holder with respect to such shares of Stock, and may not be modified adversely to the Holder’s interest except by means of a writing signed by the Company and the Holder. Notwithstanding anything herein to the contrary, this Agreement does not supersede the Class B Common Unit Grant Agreement between the Holder and CDW Holdings LLC with respect to the Class B Units that vested prior to the IPO in accordance with the terms of such Class B Common Unit Grant Agreement.

8.13.Partial Invalidity. The invalidity or unenforceability of any particular provision of this Agreement shall not affect the other provisions hereof and this Agreement shall be construed in all respects as if such invalid or unenforceable provision was omitted.

8.14.Amendment and Waiver. The provisions of this Agreement may be amended or waived only by the written agreement of the Company and the Holder, and no course of conduct or failure or delay in enforcing the provisions of this Agreement shall affect the validity, binding effect or enforceability of this Agreement.

8.15.Counterparts. The Award Notice may be executed in two counterparts, each of which shall be deemed an original and both of which together shall constitute one and the same instrument.

EXHIBIT A

ELECTION TO INCLUDE VALUE OF RESTRICTED PROPERTY
IN GROSS INCOME

13

IN YEAR OF TRANSFER UNDER CODE SECTION 83(b)

The undersigned hereby elects pursuant to Section 83(b) of the Internal Revenue Code of 1986, as amended (the “Code”), to include the value of the property described below in gross income in the year of transfer and supplies the following information in accordance with the regulations promulgated thereunder:

1. The name, address and social security number of the undersigned:

[Name]
[Address]
[Social Security Number]

2. A description of the property with respect to which the election is being made: __________ shares of Common Stock, par value $0.01per share, of CDW Corporation, a Delaware corporation, granted to the undersigned as restricted stock.

3. The date on which the property was transferred: ______ __, 20__. The taxable year for which such election is made: calendar 20__.

4. The restrictions to which the property is subject: If the employment of the undersigned terminates prior to specified dates, the undersigned will forfeit the property transferred to the undersigned.

5. The fair market value on _____________, 20__ of the property with respect to which the election is being made: $_____ per share.

6. The amount paid for such property: $_____ per share.

* * * * *

14

A copy of this election has been furnished to the Secretary of the Company pursuant to Treasury Regulations §1.83‑2(d).

Dated: ________ __, 20__ «Name»

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EX-31.1

Exhibit 31.1

CERTIFICATION PURSUANT TO RULE 15d-14(a) UNDER

THE SECURITIES EXCHANGE ACT OF 1934

I, Thomas E. Richards, certify that:

1. I have reviewed this quarterly report on Form 10-Q of CDW Corporation (the "registrant");

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 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 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 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.

/s/ Thomas E. Richards

Thomas E. Richards

Chairman and Chief Executive Officer

CDW Corporation

August 12, 2013

EX-31.2

Exhibit 31.2

CERTIFICATION PURSUANT TO RULE 15d-14(a) UNDER

THE SECURITIES EXCHANGE ACT OF 1934

I, Ann E. Ziegler, certify that:

1. I have reviewed this quarterly report on Form 10-Q of CDW Corporation (the "registrant");

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 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 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 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.

/s/ Ann E. Ziegler

Ann E. Ziegler

Senior Vice President and Chief Financial Officer

CDW Corporation

August 12, 2013

EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO SECTION 1350 OF CHAPTER 63

OF TITLE 18 OF THE UNITED STATES CODE

I, Thomas E. Richards, the chief executive officer of CDW Corporation (“CDW”), certify that (i) the Quarterly Report on Form 10-Q for the three months ended June 30, 2013 (the “10-Q”) of CDW fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the 10-Q fairly presents, in all material respects, the financial condition and results of operations of CDW.

/s/ Thomas E. Richards

Thomas E. Richards

Chairman and Chief Executive Officer

CDW Corporation

August 12, 2013

EX-32.2

Exhibit 32.2

CERTIFICATION PURSUANT TO SECTION 1350 OF CHAPTER 63

OF TITLE 18 OF THE UNITED STATES CODE

I, Ann E. Ziegler, the chief financial officer of CDW Corporation (“CDW”), certify that (i) the Quarterly Report on Form 10-Q for the three months ended June 30, 2013 (the “10-Q”) of CDW fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in the 10-Q fairly presents, in all material respects, the financial condition and results of operations of CDW.

/s/ Ann E. Ziegler

Ann E. Ziegler

Senior Vice President and Chief Financial Officer

CDW Corporation

August 12, 2013

XML

Commitments and Contingencies

6 Months Ended

Jun. 30, 2013

Commitments and Contingencies [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 and local authorities, by various partners and large 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 U.S. bankruptcy laws. 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 June 30, 2013, 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 financial condition and results of operations could be adversely affected in any particular period by the unfavorable resolution of one or more of these proceedings or matters.

XML

Consolidated Statements Of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net sales	$ 2,779.3	$ 2,584.7	$ 5,191.0	$ 4,903.9
Cost of sales	2,327.7	2,157.8	4,337.4	4,092.4
Gross profit	451.6	426.9	853.6	811.5
Selling and administrative expenses	266.4	259.5	517.9	511.1
Advertising expense	31.6	31.0	62.0	60.4
Income from operations	153.6	136.4	273.7	240.0
Interest expense, net	(70.3)	(76.9)	(142.4)	(155.8)
Net loss on extinguishments of long-term debt	(10.3)	0	(14.2)	(9.4)
Other income (loss), net	0.2	0.2	0.6	0
Income (loss) before income taxes	73.2	59.7	117.7	74.8
Income tax (expense) benefit	(26.5)	(22.9)	(42.7)	(27.1)
Net income (loss)	$ 46.7	$ 36.8	$ 75.0	$ 47.7
Net Income per Common Share, Basic	$ 0.32	$ 0.25	$ 0.52	$ 0.33
Net Income per Common Share, Diluted	$ 0.32	$ 0.25	$ 0.51	$ 0.33
Weighted Average Number of Shares Outstanding, Basic	145.3	145.1	145.2	145.0
Weighted Average Number of Shares Outstanding, Diluted	146.7	145.8	146.5	145.8

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Inventory Financing Agreements

6 Months Ended

Jun. 30, 2013

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 accompanying consolidated balance sheets. The Company does not incur any interest expense associated with these agreements as balances are paid when they are due.

The following table presents the amounts included in accounts payable-inventory financing:

(in millions)	June 30, 2013		December 31, 2012
Revolving Loan inventory financing agreement	$	280.5	$	248.3
Other inventory financing agreements	2.0		0.9
Accounts payable-inventory financing	$	282.5	$	249.2

The Company maintains a senior secured asset-based revolving credit facility as described in Note 4, which incorporates a $400.0 million floorplan sub-facility to facilitate the purchase of inventory from a certain vendor. In connection with the floorplan sub-facility, the Company maintains an inventory financing agreement on an unsecured basis with a financial intermediary to facilitate the purchase of inventory from this vendor (the “Revolving Loan inventory financing agreement”). Amounts outstanding under the Revolving Loan inventory financing agreement are unsecured and non-interest bearing.

The Company also maintains other inventory financing agreements with financial intermediaries to facilitate the purchase of inventory from certain vendors. At June 30, 2013 and December 31, 2012, amounts owed under other inventory financing agreements of $2.0 million and $0.9 million, respectively, were collateralized by the inventory purchased under these financing agreements and a second lien on the related accounts receivable.

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Earnings per Share (Tables)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Schedule of Weighted Average Number of Shares [Table Text Block]

The following is a reconciliation of basic shares to diluted shares:

	Three Months Ended June 30,		Six Months Ended June 30,
(in millions)	2013	2012	2013	2012
Weighted-average shares - basic	145.3	145.1	145.2	145.0
Effect of dilutive securities	1.4	0.7	1.3	0.8
Weighted-average shares - diluted	146.7	145.8	146.5	145.8

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Segment Information

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Segment Information

Segment Information

Segment information is presented in accordance with a “management approach,” which designates the internal reporting used by the chief operating decision-maker for making decisions and assessing performance as the source of the Company's reportable segments. The Company's segments are organized in a manner consistent with which separate financial information is available and evaluated regularly by the chief operating decision-maker in deciding how to allocate resources and in assessing performance.

The Company has two reportable segments: Corporate, which is comprised primarily of private sector business customers, and Public, which is comprised of government agencies and education and healthcare institutions. The Company also has two other operating segments, CDW Advanced Services and Canada, which do not meet the reportable segment quantitative thresholds and, accordingly, are combined together as “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 both the Corporate and Public segments. As a result, costs and intercompany charges associated with the logistics function are fully allocated to both of these segments based on a percent of 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. Depreciation expense is included in Headquarters as it is not allocated among segments or used in measuring segment performance.

The Company allocates resources to and evaluates performance of its segments based on net sales, income (loss) from operations and Adjusted EBITDA, a non-GAAP measure as defined in the Company's credit agreements. However, the Company has concluded that income (loss) from operations is the more useful measure in terms of discussion of operating results, as it is a GAAP measure.

Segment information for total assets and capital expenditures is not presented as such information is not used in measuring segment performance or allocating resources between segments.

Selected Segment Financial Information

The following table presents information about the Company’s segments for the three and six months ended June 30, 2013 and 2012:

(in millions)	Corporate			Public			Other			Headquarters			Total
Three Months Ended June 30, 2013:
Net sales	$	1,537.4		$	1,082.6		$	159.3		$	—		$	2,779.3
Income (loss) from operations	103.2			69.1			8.9			(27.6		)	153.6
Depreciation and amortization expense	(24.4		)	(11.0		)	(2.2		)	(14.7		)	(52.3		)
Three Months Ended June 30, 2012:
Net sales	$	1,394.4		$	1,040.4		$	149.9		$	—		$	2,584.7
Income (loss) from operations	92.3			66.1			5.0			(27.0		)	136.4
Depreciation and amortization expense	(24.4		)	(11.0		)	(2.4		)	(15.4		)	(53.2		)
Six Months Ended June 30, 2013:
Net sales	$	2,941.3		$	1,929.4		$	320.3		$	—		$	5,191.0
Income (loss) from operations	197.3			114.7			14.9			(53.2		)	273.7
Depreciation and amortization expense	(48.8		)	(22.1		)	(4.5		)	(28.9		)	(104.3		)
Six Months Ended June 30, 2012:
Net sales	$	2,757.2		$	1,858.0		$	288.7		$	—		$	4,903.9
Income (loss) from operations	177.1			108.2			7.5			(52.8		)	240.0
Depreciation and amortization expense	(48.7		)	(22.0		)	(4.7		)	(30.3		)	(105.7		)

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Subsequent Events (Details) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended			3 Months Ended				1 Months Ended			3 Months Ended			1 Months Ended	0 Months Ended
	Jul. 31, 2013	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jul. 02, 2013	Sep. 30, 2013 Senior Secured Notes, due 2018 [Member]	Jul. 02, 2013 Senior Secured Notes, due 2018 [Member]	Jun. 30, 2013 Senior Secured Notes, due 2018 [Member]	Dec. 31, 2012 Senior Secured Notes, due 2018 [Member]	Jul. 31, 2013 Term Loan [Member]	Jun. 30, 2013 Term Loan [Member]	Dec. 31, 2012 Term Loan [Member]	Sep. 30, 2013 Senior Subordinated Notes [Member]	Aug. 01, 2013 Senior Subordinated Notes [Member]	Mar. 10, 2010 Senior Subordinated Notes [Member]	Jul. 31, 2013 IPO Over-Allotment [Member]	Jul. 02, 2013 IPO [Member]	Aug. 01, 2013 IPO Proceeds [Member] Senior Subordinated Notes [Member]	Aug. 01, 2013 Term Loan Incremental Borrowings [Member] Senior Subordinated Notes [Member]
Subsequent Event [Line Items]
Stock Issued During Period, Shares, New Issues																	3,487,500	23,250,000
Sale of Stock, Price Per Share																	$ 17.00	$ 17.00
Proceeds from Issuance Initial Public Offering	$ 429,500,000
Net Proceeds Used For Termination Of Agreement						24,400,000
Debt Instrument, Repurchased Face Amount								175,000,000							324,000,000	28,500,000			146,000,000	178,000,000
Debt Instrument, Increase, Additional Borrowings											190,000,000
Debt, short-term and long-term								325,000,000	500,000,000	500,000,000		1,346,600,000	1,339,500,000		247,500,000
Net loss on extinguishments of long-term debt		10,300,000	0	14,200,000	9,400,000		16,700,000							24,700,000
Redemption Premium, percentage of par value								108.00%							106.268%
Extinguishment of Debt, Accrued Interest Paid to Lenders								700,000							12,000,000
Extinguishment of Debt, Fees Paid to Lenders								14,000,000							20,300,000
Write off of unamortized deferred financing costs							2,700,000							4,400,000
Litigation Settlement, Net Of Expense	10,500,000
Proceeds from Legal Settlements	$ 8,500,000

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Income Taxes (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Effective Income Tax Rate	36.20%	38.40%	36.30%	36.20%

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Description Of Business And Summary Of Significant Accounting Policies Stock Split (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Stock Split [Abstract]
Common shares, par value	$ 0.01	$ 0.01

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Supplemental Guarantor Information (Tables)

6 Months Ended

Jun. 30, 2013

Supplemental Guarantor Information [Abstract]

Condensed Consolidating Balance Sheets

Condensed Consolidating Balance Sheet
December 31, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Assets
Current assets:
Cash and cash equivalents	$	—	$	48.0	$	—	$	9.8		$	—	$	(19.9	)	$	37.9
Accounts receivable, net	—		—		1,217.7		67.3			—		—			1,285.0
Merchandise inventory	—		—		313.2		1.4			—		—			314.6
Miscellaneous receivables	—		61.7		82.0		4.8			—		—			148.5
Deferred income taxes	—		8.7		5.5		(0.1		)	—		—			14.1
Prepaid expenses and other	—		10.1		24.4		0.1			—		—			34.6
Total current assets	—		128.5		1,642.8		83.3			—		(19.9		)	1,834.7
Property and equipment, net	—		73.9		66.2		2.6			—		—			142.7
Goodwill	—		749.4		1,428.5		31.4			—		—			2,209.3
Other intangible assets, net	—		348.6		1,121.7		8.2			—		—			1,478.5
Deferred financing costs, net	—		53.2		—		—			—		—			53.2
Other assets	5.4		1.1		0.4		0.6			—		(5.9		)	1.6
Investment in and advances to subsidiaries	131.1		2,946.0		—		—			—		(3,077.1		)	—
Total assets	$	136.5	$	4,300.7	$	4,259.6	$	126.1		$	—	$	(3,102.9	)	$	5,720.0
Liabilities and Shareholders’ Equity
Current liabilities:
Accounts payable—trade	$	—	$	16.5	$	500.3	$	21.7		$	—	$	(19.9	)	$	518.6
Accounts payable—inventory financing	—		—		249.2		—			—		—			249.2
Current maturities of long-term debt	—		40.0		—		—			—		—			40.0
Deferred revenue	—		—		57.8		—			—		—			57.8
Accrued expenses	—		139.3		157.4		5.9			—		—			302.6
Total current liabilities	—		195.8		964.7		27.6			—		(19.9		)	1,168.2
Long-term liabilities:
Debt	—		3,731.0		—		—			—		—			3,731.0
Deferred income taxes	—		188.1		440.0		1.7			—		(5.5		)	624.3
Accrued interest	—		8.0		—		—			—		—			8.0
Other liabilities	—		46.7		4.0		1.7			—		(0.4		)	52.0
Total long-term liabilities	—		3,973.8		444.0		3.4			—		(5.9		)	4,415.3
Total shareholders’ equity	136.5		131.1		2,850.9		95.1			—		(3,077.1		)	136.5
Total liabilities and shareholders' equity	$	136.5	$	4,300.7	$	4,259.6	$	126.1		$	—	$	(3,102.9	)	$	5,720.0

Condensed Consolidating Balance Sheet
June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Assets
Current assets:
Cash and cash equivalents	$	—	$	142.0	$	11.2	$	26.2		$	—	$	(0.1	)	$	179.3
Accounts receivable, net	—		—		1,335.2		55.3			—		—			1,390.5
Merchandise inventory	—		—		376.2		2.3			—		—			378.5
Miscellaneous receivables	—		55.4		103.3		6.4			—		—			165.1
Deferred income taxes	—		8.5		3.7		(0.1		)	—		—			12.1
Prepaid expenses and other	—		24.0		83.6		0.6			—		—			108.2
Total current assets	—		229.9		1,913.2		90.7			—		(0.1		)	2,233.7
Property and equipment, net	—		69.4		61.1		2.2			—		—			132.7
Goodwill	—		749.4		1,428.5		29.5			—		—			2,207.4
Other intangible assets, net	—		343.9		1,052.5		7.3			—		—			1,403.7
Deferred financing costs, net	—		41.4		—		—			—		—			41.4
Other assets	5.2		1.5		0.1		0.6			—		(5.8		)	1.6
Investment from and advances to subsidiaries	203.8		2,892.0		—		—			—		(3,095.8		)	—
Total assets	$	209.0	$	4,327.5	$	4,455.4	$	130.3		$	—	$	(3,101.7	)	$	6,020.5
Liabilities and Shareholders’ Equity
Current liabilities:
Accounts payable—trade	$	—	$	20.6	$	725.2	$	25.3		$	—	$	(0.1	)	$	771.0
Accounts payable—inventory financing	—		—		282.5		—			—		—			282.5
Current maturities of long-term debt	—		13.5		—		—			—		—			13.5
Deferred revenue	—		—		96.5		0.4			—		—			96.9
Accrued expenses	—		136.4		138.9		6.0			—		—			281.3
Total current liabilities	—		170.5		1,243.1		31.7			—		(0.1		)	1,445.2
Long-term liabilities:
Debt	—		3,710.9		—		—			—		—			3,710.9
Deferred income taxes	—		189.8		412.1		1.6			—		(5.2		)	598.3
Accrued interest	—		6.4		—		—			—		—			6.4
Other liabilities	—		46.1		3.6		1.6			—		(0.6		)	50.7
Total long-term liabilities	—		3,953.2		415.7		3.2			—		(5.8		)	4,366.3
Total shareholders’ equity	209.0		203.8		2,796.6		95.4			—		(3,095.8		)	209.0
Total liabilities and shareholders’ equity	$	209.0	$	4,327.5	$	4,455.4	$	130.3		$	—	$	(3,101.7	)	$	6,020.5

Consolidating Statements of Operations

Consolidating Statement of Operations
Three Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net sales	$	—	$	—		$	2,662.0		$	117.3		$	—	$	—		$	2,779.3
Cost of sales	—		—			2,225.4			102.3			—		—			2,327.7
Gross profit	—		—			436.6			15.0			—		—			451.6
Selling and administrative expenses	—		27.6			230.1			8.7			—		—			266.4
Advertising expense	—		—			30.6			1.0			—		—			31.6
(Loss) income from operations	—		(27.6		)	175.9			5.3			—		—			153.6
Interest (expense) income, net	—		(70.4		)	—			0.1			—		—			(70.3		)
Net loss on extinguishments of long-term debt	—		(10.3		)	—			—			—		—			(10.3		)
Management fee	—		1.6			—			(1.6		)	—		—			—
Other (expense) income, net	—		(0.2		)	0.3			0.1			—		—			0.2
(Loss) income before income taxes	—		(106.9		)	176.2			3.9			—		—			73.2
Income tax benefit (expense)	—		39.8			(65.6		)	(0.7		)	—		—			(26.5		)
(Loss) income before equity in earnings of subsidiaries	—		(67.1		)	110.6			3.2			—		—			46.7
Equity in earnings of subsidiaries	46.7		113.8			—			—			—		(160.5		)	—
Net income	$	46.7	$	46.7		$	110.6		$	3.2		$	—	$	(160.5	)	$	46.7

Consolidating Statement of Operations
Three Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net sales	$	—	$	—		$	2,471.9		$	112.8		$	—	$	—		$	2,584.7
Cost of sales	—		—			2,059.2			98.6			—		—			2,157.8
Gross profit	—		—			412.7			14.2			—		—			426.9
Selling and administrative expenses	—		27.0			224.1			8.4			—		—			259.5
Advertising expense	—		—			29.9			1.1			—		—			31.0
(Loss) income from operations	—		(27.0		)	158.7			4.7			—		—			136.4
Interest expense, net	—		(76.9		)	—			—			—		—			(76.9		)
Net loss on extinguishments of long-term debt	—		—			—			—			—		—			—
Management fee	—		0.8			—			(0.8		)	—		—			—
Other income, net	—		0.2			—			—			—		—			0.2
(Loss) income before income taxes	—		(102.9		)	158.7			3.9			—		—			59.7
Income tax benefit (expense)	—		41.0			(62.9		)	(1.0		)	—		—			(22.9		)
(Loss) income before equity in earnings of subsidiaries	—		(61.9		)	95.8			2.9			—		—			36.8
Equity in earnings of subsidiaries	36.8		98.7			—			—			—		(135.5		)	—
Net income	$	36.8	$	36.8		$	95.8		$	2.9		$	—	$	(135.5	)	$	36.8

Consolidating Statement of Operations
Six Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net sales	$	—	$	—		$	4,684.9		$	219.0		$	—	$	—		$	4,903.9
Cost of sales	—		—			3,901.2			191.2			—		—			4,092.4
Gross profit	—		—			783.7			27.8			—		—			811.5
Selling and administrative expenses	—		52.8			441.3			17.0			—		—			511.1
Advertising expense	—		—			58.5			1.9			—		—			60.4
(Loss) income from operations	—		(52.8		)	283.9			8.9			—		—			240.0
Interest (expense) income, net	—		(156.1		)	0.3			—			—		—			(155.8		)
Net loss on extinguishments of long-term debt	—		(9.4		)	—			—			—		—			(9.4		)
Management fee	—		2.2			—			(2.2		)	—		—			—
Other (expense) income, net	—		(0.1		)	0.1			—			—		—			—
(Loss) income before income taxes	—		(216.2		)	284.3			6.7			—		—			74.8
Income tax benefit (expense)	—		89.8			(115.1		)	(1.8		)	—		—			(27.1		)
(Loss) income before equity in earnings of subsidiaries	—		(126.4		)	169.2			4.9			—		—			47.7
Equity in earnings of subsidiaries	47.7		174.1			—			—			—		(221.8		)	—
Net income	$	47.7	$	47.7		$	169.2		$	4.9		$	—	$	(221.8	)	$	47.7

Consolidating Statement of Operations
Six Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net sales	$	—	$	—		$	4,951.8		$	239.2		$	—	$	—		$	5,191.0
Cost of sales	—		—			4,127.5			209.9			—		—			4,337.4
Gross profit	—		—			824.3			29.3			—		—			853.6
Selling and administrative expenses	—		53.3			446.8			17.8			—		—			517.9
Advertising expense	—		—			60.2			1.8			—		—			62.0
(Loss) income from operations	—		(53.3		)	317.3			9.7			—		—			273.7
Interest (expense) income, net	—		(142.6		)	—			0.2			—		—			(142.4		)
Net loss on extinguishments of long-term debt	—		(14.2		)	—			—			—		—			(14.2		)
Management fee	—		2.5			—			(2.5		)	—		—			—
Other (expense) income, net	—		(0.2		)	0.6			0.2			—		—			0.6
(Loss) income before income taxes	—		(207.8		)	317.9			7.6			—		—			117.7
Income tax benefit (expense)	—		77.5			(118.6		)	(1.6		)	—		—			(42.7		)
(Loss) income before equity in earnings of subsidiaries	—		(130.3		)	199.3			6.0			—		—			75.0
Equity in earnings of subsidiaries	75.0		205.3			—			—			—		(280.3		)	—
Net income	$	75.0	$	75.0		$	199.3		$	6.0		$	—	$	(280.3	)	$	75.0

Condensed Consolidating Statements of Comprehensive Income (Loss)

Condensed Consolidating Statement of Comprehensive Income
Three Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Comprehensive income (loss)	$	43.4	$	43.4	$	110.6	$	(0.1	)	$	—	$	(153.9	)	$	43.4

Condensed Consolidating Statement of Comprehensive Income
Six Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary		Co-Issuer		Consolidating Adjustments			Consolidated
Comprehensive income	$	48.0	$	48.0	$	169.2	$	5.2	$	—	$	(222.4	)	$	48.0

Condensed Consolidating Statement of Comprehensive Income
Three Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary		Co-Issuer		Consolidating Adjustments			Consolidated
Comprehensive income	$	35.2	$	35.2	$	95.8	$	1.3	$	—	$	(132.3	)	$	35.2

Condensed Consolidating Statement of Comprehensive Income
Six Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary		Co-Issuer		Consolidating Adjustments			Consolidated
Comprehensive income	$	69.3	$	69.3	$	199.3	$	0.3	$	—	$	(268.9	)	$	69.3

Condensed Consolidating Statements Cash Flows

Condensed Consolidating Statement of Cash Flows
Six Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net cash (used in) provided by operating activities	$	—	$	(109.5	)	$	279.1		$	17.7		$	—	$	19.8		$	207.1
Cash flows from investing activities:
Capital expenditures	—		(18.0		)	(2.0		)	—			—		—			(20.0		)
Net cash used in investing activities	—		(18.0		)	(2.0		)	—			—		—			(20.0		)
Cash flows from financing activities:
Proceeds from borrowings under revolving credit facility	—		63.0			—			—			—		—			63.0
Repayments of borrowings under revolving credit facility	—		(63.0		)	—			—			—		—			(63.0		)
Repayments of long-term debt	—		(43.4		)	—			—			—		—			(43.4		)
Proceeds from issuance of long-term debt	—		1,346.6			—			—			—		—			1,346.6
Payments to extinguish long-term debt	—		(1,352.6		)	—			—			—		—			(1,352.6		)
Net change in accounts payable-inventory financing	—		—			33.3			—			—		—			33.3
Payment of incentive compensation plan withholding taxes	—		(3.8		)	(19.5		)	—			—		—			(23.3		)
Advances from (to) affiliates	—		279.6			(279.7		)	0.1			—		—			—
Other financing activities	—		(4.9		)	—			—			—		—			(4.9		)
Net cash provided by (used in) financing activities	—		221.5			(265.9		)	0.1			—		—			(44.3		)
Effect of exchange rate changes on cash and cash equivalents	—		—			—			(1.4		)	—		—			(1.4		)
Net increase in cash and cash equivalents	—		94.0			11.2			16.4			—		19.8			141.4
Cash and cash equivalents—beginning of period	—		48.0			—			9.8			—		(19.9		)	37.9
Cash and cash equivalents—end of period	$	—	$	142.0		$	11.2		$	26.2		$	—	$	(0.1	)	$	179.3

Condensed Consolidating Statement of Cash Flows
Six Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net cash (used in) provided by operating activities	$	—	$	(118.3	)	$	410.6		$	13.1		$	—	$	(0.7	)	$	304.7
Cash flows from investing activities:
Capital expenditures	—		(8.8		)	(6.5		)	(0.4		)	—		—			(15.7		)
Net cash used in investing activities	—		(8.8		)	(6.5		)	(0.4		)	—		—			(15.7		)
Cash flows from financing activities:
Proceeds from borrowings under revolving credit facility	—		256.0			—			—			—		—			256.0
Repayments of borrowings under revolving credit facility	—		(256.0		)	—			—			—		—			(256.0		)
Repayments of long-term debt	—		(201.0		)	—			—			—		—			(201.0		)
Proceeds from issuance of long-term debt	—		135.7			—			—			—		—			135.7
Payments to extinguish long-term debt	—		(136.9		)	—			—			—		—			(136.9		)
Net change in accounts payable-inventory financing	—		—			(25.5		)	—			—		—			(25.5		)
Advances from (to) affiliates	—		371.8			(372.3		)	0.5			—		—			—
Other financing activities	—		(2.4		)	—			—			—		—			(2.4		)
Net cash provided by (used in) financing activities	—		167.2			(397.8		)	0.5			—		—			(230.1		)
Effect of exchange rate changes on cash and cash equivalents	—		—			—			(0.1		)	—		—			(0.1		)
Net increase in cash and cash equivalents	—		40.1			6.3			13.1			—		(0.7		)	58.8
Cash and cash equivalents—beginning of period	—		102.1			15.8			8.1			—		(26.1		)	99.9
Cash and cash equivalents—end of period	$	—	$	142.2		$	22.1		$	21.2		$	—	$	(26.8	)	$	158.7

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Supplemental Guarantor Information -Condensed Consolidating Statements of Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 43.4	$ 35.2	$ 69.3	$ 48.0
Parent Guarantor [Member]
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	43.4	35.2	69.3	48.0
Subsidiary Issuer [Member]
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	43.4	35.2	69.3	48.0
Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	110.6	95.8	199.3	169.2
Non-Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(0.1)	1.3	0.3	5.2
Co-Issuer [Member]
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	0	0	0	0
Consolidating Adjustments [Member]
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	(153.9)	(132.3)	(268.9)	(222.4)
Consolidated [Member]
Supplemental Guarantor Information [Line Items]
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 43.4	$ 35.2	$ 69.3	$ 48.0

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Long-Term Debt -Senior Notes due 2015 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended					6 Months Ended					1 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Senior PIK Exchange Notes due 2015 [Member]	Jun. 30, 2013 Senior PIK Interest Exchange Notes due 2015 [Member]	Jun. 30, 2013 Senior Exchange Notes due 2015 [Member]	Jun. 30, 2012 Senior Notes, due 2015 [Member]	Jun. 30, 2013 Senior Notes, due 2015 [Member]	Dec. 31, 2012 Senior Notes, due 2015 [Member]	Feb. 17, 2012 Senior Notes, due 2015 [Member]	Dec. 31, 2011 Senior Notes, due 2015 [Member]	Feb. 29, 2012 2019 Senior Notes, due 2019 [Member]	Jun. 30, 2013 2019 Senior Notes, due 2019 [Member]	Dec. 31, 2012 2019 Senior Notes, due 2019 [Member]
Debt Instrument [Line Items]
Long-term Debt, stated interest rate					11.50%	12.25%	11.00%							8.50%
Debt, short-term and long-term									$ 0	$ 0		$ 129.0		$ 1,305.0	$ 1,305.0
Proceeds from Issuance of long-term Debt			1,346.6	135.7									130.0
Net loss on extinguishments of long-term debt	10.3	0	14.2	9.4				9.4
Write off of unamortized deferred financing costs								1.5
Extinguishment of Debt, Fees Paid to Lenders											$ 7.9

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Equity-Based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Sep. 30, 2013 MPK Plan Units [Member]	Jun. 30, 2013 Restricted Stock [Member]	Jun. 30, 2013 Restricted Stock Units (RSUs) [Member]
Equity-Based Compensation Plan Activity [Line Items]
Equity-based compensation expense	$ 2.1	$ 5.8	$ 4.0	$ 11.5
Equity-based compensation expense, incremental expense		1.7		3.3
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	11,700,000		11,700,000
Equity awards granted						3,798,508	1,400,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross			1,300,000
Accelerated share based compensation expense recognized					36.7
Payment of incentive compensation plan withholding taxes			23.3	0
Payment of incentive compensation plan withholding taxes, employer portion			$ 4.0
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period							4 years 0 months 0 days

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Long-Term Debt -Term Loan (Details) (USD $)	3 Months Ended		6 Months Ended		1 Months Ended	3 Months Ended			1 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Apr. 30, 2013 Term Loan [Member]	Jun. 30, 2013 Term Loan [Member]	Apr. 29, 2013 Term Loan [Member]	Dec. 31, 2012 Term Loan [Member]	Jan. 31, 2013 Prior Term Loan Facility [Member]	Jun. 30, 2013 Prior Term Loan Facility [Member]	Mar. 31, 2013 Prior Term Loan Facility [Member]	Jun. 30, 2013 Greater than 5.5 [Member] Term Loan [Member]	Jun. 30, 2013 Less than or equal to 5.5 but greater than 4.5 [Member] Term Loan [Member]	Jun. 30, 2013 Less than or equal to 4.5 [Member] Term Loan [Member]	Jun. 30, 2013 Maximum, less than or equal to 5.5 [Member] Term Loan [Member]	Jun. 30, 2013 Minimum, greater than 4.5 [Member] Term Loan [Member]	Jun. 30, 2013 Maximum, less than or equal to 4.5 [Member] Term Loan [Member]	Jun. 30, 2013 LIBOR [Member] Minimum [Member] Term Loan [Member]	Jun. 30, 2013 LIBOR [Member] Maximum [Member] Term Loan [Member]	Jun. 30, 2013 ABR [Member] Minimum [Member] Term Loan [Member]	Jun. 30, 2013 ABR [Member] Maximum [Member] Term Loan [Member]	Jun. 30, 2013 Accounts Payable, Inventory Financing [Member]
Debt Instrument [Line Items]
Floorplan sub-facility, reserve																						$ 8,800,000
Proceeds from Issuance of long-term Debt			1,346,600,000	135,700,000	1,350,000,000
Debt, short-term and long-term						1,346,600,000		1,339,500,000			1,299,500,000
Mandatory prepayments as percentage of excess cash flow												50.00%	25.00%	0.00%
Net leverage ratio						4.5		4.9							5.5	4.5	4.5
Debt Instrument, Periodic Payment, Principal						3,375,000
Term Loan Repayments									40,000,000
Debt Instrument, Unamortized Discount						(3,300,000)	3,400,000	0
Net loss on extinguishments of long-term debt	$ (10,300,000)	$ 0	$ (14,200,000)	$ (9,400,000)						$ (10,300,000)
Discount, percent of par							99.75%
Reference Interest Rate Floor																		1.00%
Variable Interest Rate Margin																		2.25%	2.50%	1250000.00%	1500000.00%

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Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Information [Line Items]
Number of Reportable Segments			2
Number of operating segments which do not meet reportable unit quantitative threshold			2
Net sales	$ 2,779.3	$ 2,584.7	$ 5,191.0	$ 4,903.9
Income (loss) from operations	153.6	136.4	273.7	240.0
Depreciation and amortization expense	(52.3)	(53.2)	(104.3)	(105.7)
Corporate [Member]
Segment Information [Line Items]
Net sales	1,537.4	1,394.4	2,941.3	2,757.2
Income (loss) from operations	103.2	92.3	197.3	177.1
Depreciation and amortization expense	(24.4)	(24.4)	(48.8)	(48.7)
Public [Member]
Segment Information [Line Items]
Net sales	1,082.6	1,040.4	1,929.4	1,858.0
Income (loss) from operations	69.1	66.1	114.7	108.2
Depreciation and amortization expense	(11.0)	(11.0)	(22.1)	(22.0)
Other [Member]
Segment Information [Line Items]
Net sales	159.3	149.9	320.3	288.7
Income (loss) from operations	8.9	5.0	14.9	7.5
Depreciation and amortization expense	(2.2)	(2.4)	(4.5)	(4.7)
Headquarters [Member]
Segment Information [Line Items]
Net sales	0	0	0	0
Income (loss) from operations	(27.6)	(27.0)	(53.2)	(52.8)
Depreciation and amortization expense	$ (14.7)	$ (15.4)	$ (28.9)	$ (30.3)

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Segment Information (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Segment Reporting

The following table presents information about the Company’s segments for the three and six months ended June 30, 2013 and 2012:

(in millions)	Corporate			Public			Other			Headquarters			Total
Three Months Ended June 30, 2013:
Net sales	$	1,537.4		$	1,082.6		$	159.3		$	—		$	2,779.3
Income (loss) from operations	103.2			69.1			8.9			(27.6		)	153.6
Depreciation and amortization expense	(24.4		)	(11.0		)	(2.2		)	(14.7		)	(52.3		)
Three Months Ended June 30, 2012:
Net sales	$	1,394.4		$	1,040.4		$	149.9		$	—		$	2,584.7
Income (loss) from operations	92.3			66.1			5.0			(27.0		)	136.4
Depreciation and amortization expense	(24.4		)	(11.0		)	(2.4		)	(15.4		)	(53.2		)
Six Months Ended June 30, 2013:
Net sales	$	2,941.3		$	1,929.4		$	320.3		$	—		$	5,191.0
Income (loss) from operations	197.3			114.7			14.9			(53.2		)	273.7
Depreciation and amortization expense	(48.8		)	(22.1		)	(4.5		)	(28.9		)	(104.3		)
Six Months Ended June 30, 2012:
Net sales	$	2,757.2		$	1,858.0		$	288.7		$	—		$	4,903.9
Income (loss) from operations	177.1			108.2			7.5			(52.8		)	240.0
Depreciation and amortization expense	(48.7		)	(22.0		)	(4.7		)	(30.3		)	(105.7		)

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Consolidated Statement Of Shareholders' Equity (Deficit) (USD $) In Millions, unless otherwise specified	Total	Common Shares [Member]	Preferred Stock [Member]	Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2012	$ 136.5	$ 1.4	$ 0	$ 2,207.7	$ (2,073.0)	$ 0.4
Shareholders' Equity (Deficit) [Roll Forward]
Equity-based compensation expense	4.0	0	0	4.0	0	0
Treasury Stock, Value, Acquired, Cost Method	(0.1)	0	0	0	(0.1)	0
Accrued charitable contribution related to the MPK Coworker Incentive Plan II, net of tax	(0.6)	0	0	(0.6)	0	0
MPK Coworker Incentive Plan II units withheld for taxes	(0.1)	0	0	(0.1)	0	0
Net income (loss)	75.0	0	0	0	75.0	0
Foreign currency translation adjustment	(5.7)	0	0	0	0	(5.7)
Balance at Jun. 30, 2013	$ 209.0	$ 1.4	$ 0	$ 2,211.0	$ (1,998.1)	$ (5.3)

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Description Of Business And Summary Of Significant Accounting Policies

6 Months Ended

Jun. 30, 2013

Description of Business and Summary of Significant 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 is a Fortune 500 company and a leading provider of integrated information technology (“IT”) solutions to small, medium and large business, government, education and healthcare customers in the U.S. and Canada. The Company's offerings range from discrete hardware and software products to integrated IT solutions such as mobility, security, data center optimization, cloud computing, virtualization and collaboration.

Basis of Presentation

The accompanying unaudited interim consolidated financial statements as of June 30, 2013 and for the three and six months ended June 30, 2013 and 2012 ("consolidated financial statements") have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC") for interim financial statements. Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been condensed or omitted pursuant to such rules and regulations. The consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2012 ("December 31, 2012 financial statements"). The significant accounting policies used in preparing these consolidated financial statements were applied on a basis consistent with those reflected in the December 31, 2012 financial statements, except as disclosed in Note 2. 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 shareholders' equity as of the dates and for the periods indicated. The unaudited consolidated statements of operations for such interim periods reported are not necessarily indicative of results for the full year.

CDW Corporation ("Parent") was previously owned directly by CDW Holdings LLC ("CDW Holdings"), a company controlled by investment funds affiliated with Madison Dearborn Partners, LLC ("Madison Dearborn") and Providence Equity Partners, L.L.C. ("Providence Equity," and together with Madison Dearborn, the "Sponsors"), certain other co-investors and certain members of CDW management. On July 2, 2013, Parent completed an initial public offering ("IPO") of its common stock. During June 2013, in connection with the IPO, CDW Holdings distributed all of its shares of Parent's common stock to its members in accordance with their respective membership interests. See Note 13 for additional discussion of Parent's IPO.

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 as described in Note 12 and does not hold any material assets or engage in any business activities or operations.

Throughout these notes, the terms the “Company” and “CDW” refer to Parent and its 100% owned subsidiaries.

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of Parent and its 100% owned subsidiaries. All intercompany transactions and accounts are eliminated in consolidation.

Use of Estimates

The preparation of consolidated financial statements in accordance with GAAP requires management to make use of certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported periods. The Company bases its estimates on historical experience and on various other assumptions that management believes are reasonable under the circumstances, the results of which form the basis for making judgments about carrying values of assets and liabilities that are not readily apparent from other sources. Actual results could differ from those estimates.

The notes to the consolidated financial statements contained in the December 31, 2012 financial statements include an additional discussion of the significant accounting policies and estimates used in the preparation of the Company's consolidated financial statements. There have been no material changes to the Company's significant accounting policies and estimates during the six months ended June 30, 2013.

Reclassifications

Certain reclassifications have been made to the prior period consolidated financial statements to conform to the current period presentation.

See Note 6 for a description of the reclassification and split of the Company's common shares that were completed during the second quarter of 2013.

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Long-Term Debt

6 Months Ended

Jun. 30, 2013

Long-term Debt, Unclassified [Abstract]

Long-Term Debt

Long-Term Debt

Long-term debt was as follows:

(dollars in millions)	Interest Rate (1)		June 30, 2013			December 31, 2012
Senior secured asset-based revolving credit facility	—	%	$	—		$	—
Senior secured term loan facility	3.5	%	1,346.6			1,339.5
Unamortized discount on senior secured term loan facility			(3.3		)	—
Senior secured notes due 2018	8.0	%	500.0			500.0
Senior notes due 2019	8.5	%	1,305.0			1,305.0
Unamortized premium on senior notes due 2019			4.6			5.0
Senior subordinated notes due 2017	12.535	%	571.5			621.5
Senior notes due 2015	—	%	—			—
Total long-term debt			3,724.4			3,771.0
Less current maturities of long-term debt			(13.5		)	(40.0		)
Long-term debt, excluding current maturities			$	3,710.9		$	3,731.0

(1)Weighted-average interest rate at June 30, 2013.

At June 30, 2013, the Company was in compliance with the covenants under its various credit agreements as described below.

Senior Secured Asset-Based Revolving Credit Facility (“Revolving Loan”)

At June 30, 2013, the Company had no outstanding borrowings under the Revolving Loan, $1.2 million of undrawn letters of credit and $267.4 million reserved related to the floorplan sub-facility. The Revolving Loan matures on June 24, 2016.

In connection with the floorplan sub-facility, the Company maintains a Revolving Loan inventory financing agreement with a financial intermediary. At June 30, 2013, the financial intermediary reported an outstanding balance of $258.6 million under the Revolving Loan inventory financing agreement. The total amount reported on the Company's consolidated balance sheet as accounts payable-inventory financing related to the Revolving Loan inventory financing agreement is $21.9 million more than the $258.6 million owed to the financial intermediary due to differences in the timing of reporting activity under the Revolving Loan inventory financing agreement. The outstanding balance reported by the financial intermediary excludes $8.8 million in reserves for open orders that reduce the availability under the Revolving Loan.

Availability under the Revolving Loan is limited to (a) the lesser of the revolving commitment of $900.0 million and the amount of the borrowing base less (b) outstanding borrowings, letters of credit, and amounts outstanding under the Revolving Loan inventory financing agreement plus a reserve of 15% of open orders. At June 30, 2013, the borrowing base was $1,098.8 million based on the amount of eligible inventory and accounts receivable balances as of May 31, 2013. The Company could have borrowed up to an additional $631.4 million under the Revolving Loan at June 30, 2013.

Senior Secured Term Loan Facility

On April 29, 2013, the Company entered into a new seven-year, $1,350.0 million aggregate principal amount senior secured term loan facility (the "Term Loan"). Substantially all of the proceeds from the Term Loan were used to repay the $1,299.5 million outstanding aggregate principal amount of the prior senior secured term loan facility (the "Prior Term Loan Facility"). In connection with this refinancing, the Company recorded a loss on extinguishment of long-term debt of $10.3 million in the consolidated statement of operations for the three and six months ended June 30, 2013. This loss represented a write-off of the remaining unamortized deferred financing costs related to the Prior Term Loan Facility.

The Term Loan was issued at a price of 99.75% of par, which resulted in a discount of $3.4 million. This discount is reported on the consolidated balance sheet as a reduction to the face amount of the Term Loan and is being amortized over the term of the related debt. Borrowings under the Term Loan bear interest at either (a) the alternate base rate ("ABR") plus a margin or (b) LIBOR plus a margin; provided that for the purposes of the Term Loan, LIBOR shall not be less than 1.00% per annum at any time. The margin is based upon a net leverage ratio as defined in the agreement governing the Term Loan, ranging from 1.25%-1.50% for ABR borrowings and 2.25%- 2.50% for LIBOR borrowings.

Unlike the Prior Term Loan Facility, the Term Loan does not include a senior secured leverage ratio requirement or a hedging requirement. Additionally, the definition of debt under the Term Loan was revised to exclude amounts outstanding under the Company's inventory financing agreements. The Term Loan is subject to certain requirements as was the Prior Term Loan Facility to make mandatory annual excess cash flow prepayments under designated circumstances, including (i) a prepayment in an amount equal to 50% of the Company's excess cash flow for a fiscal year (the percentage rate of which decreases to 25% when the total net leverage ratio, as defined in the governing agreement, is less than or equal to 5.5 but greater than 4.5; and decreases to 0% when the total net leverage ratio is less than or equal to 4.5), and (ii) the net cash proceeds from the incurrence of certain additional indebtedness by the Company or its subsidiaries. The total net leverage ratio was 4.5 and 4.9 at June 30, 2013 and December 31, 2012, respectively. The total net leverage ratio at December 31, 2012 has been revised to conform to the definition in the agreement governing the Term Loan.

The Company is required to pay quarterly principal installments equal to $3.375 million, with the remaining principal amount payable on the maturity date of April 29, 2020. The quarterly principal installment payments commenced during the quarter ended June 30, 2013. At June 30, 2013, the outstanding principal amount of the Term Loan was $1,346.6 million, excluding $3.3 million in unamortized discount.

The Company has ten interest rate cap agreements in effect through January 14, 2015 with a combined notional amount of $1,150.0 million. These cap agreements have not been designated as cash flow hedges of interest rate risk for GAAP accounting purposes. Of the total $1,150.0 million notional amount, $500.0 million entitle the Company to payments from the counterparty of the amount, if any, by which three-month LIBOR exceeds 3.5% during the agreement period. The remaining cap agreements with a notional amount of $650.0 million entitle the Company to payments from the counterparty of the amount, if any, by which the three-month LIBOR exceeds 1.5% during the agreement period. The fair value of the Company's interest rate cap agreements was $0.2 million at June 30, 2013 and $0.1 million at December 31, 2012.

On January 30, 2013, the Company made an optional prepayment of $40.0 million aggregate principal amount outstanding under the Prior Term Loan Facility. The optional prepayment satisfied the excess cash flow payment provision of the Prior Term Loan Facility with respect to the year ended December 31, 2012.

See Note 13 for a description of the incremental borrowings under the Term Loan completed during the third quarter of 2013.

8.0% Senior Secured Notes due 2018 (“Senior Secured Notes”)

The Senior Secured Notes were issued on December 17, 2010 and mature on December 15, 2018. At June 30, 2013, the outstanding principal amount of the Senior Secured Notes was $500.0 million.

See Note 13 for a description of the partial redemption of Senior Secured Notes completed during the third quarter of 2013.

11.0% Senior Exchange Notes due 2015 (“Senior Exchange Notes”); 11.5% / 12.25% Senior PIK Election Exchange Notes due 2015 (“PIK Election Notes” together with the Senior Exchange Notes, the “Senior Notes due 2015”)

At June 30, 2013 and December 31, 2012, there were no outstanding Senior Notes due 2015.

In February and March 2012, the Company purchased or redeemed the remaining $129.0 million aggregate principal amount of Senior Notes due 2015, funded with the issuance of $130.0 million aggregate principal amount of additional Senior Notes (as defined below). In connection with these transactions, the Company recorded a loss on extinguishment of long-term debt of $9.4 million in the Company's consolidated statement of operations for the six months ended June 30, 2012. This loss represented $7.9 million in tender and redemption premiums and $1.5 million for the write-off of the remaining unamortized deferred financing costs related to the Senior Notes due 2015.

8.5% Senior Notes due 2019 (“Senior Notes”)

On February 17, 2012, the Company issued $130.0 million aggregate principal amount of additional Senior Notes at an issue price of 104.375% of par. The $5.7 million premium received is reported on the consolidated balance sheets as an addition to the face amount of the Senior Notes and is being amortized as a reduction to interest expense over the term of the related debt. At June 30, 2013, the outstanding principal amount of Senior Notes was $1,305.0 million, excluding $4.6 million in unamortized premium. The Senior Notes mature on April 1, 2019.

12.535% Senior Subordinated Exchange Notes due 2017 (“Senior Subordinated Notes”)

At June 30, 2013, the outstanding principal amount of the Company's Senior Subordinated Notes was $571.5 million. The Senior Subordinated Notes mature on October 12, 2017.

On March 8, 2013, the Company redeemed $50.0 million aggregate principal amount of Senior Subordinated Notes at a redemption price that was 106.268% of the principal amount redeemed. Cash on hand was used to fund the redemption of $50.0 million aggregate principal amount, $3.1 million of redemption premium and $2.5 million in accrued and unpaid interest. In connection with this redemption, the Company recorded a loss on extinguishment of long-term debt of $3.9 million in the Company's consolidated statement of operations for the six months ended June 30, 2013. This loss represented $3.1 million in redemption premium and $0.8 million for the write-off of a portion of the unamortized deferred financing costs related to the Senior Subordinated Notes.

See Note 13 for a description of the partial redemption of Senior Subordinated Notes completed during the third quarter of 2013.

Fair Value

The fair value of the Company's long-term debt instruments at June 30, 2013 was $3,899.9 million. The fair value of the Senior Secured Notes, Senior Notes and Senior Subordinated Notes is estimated using quoted market prices for identical assets or liabilities that are traded in over-the-counter secondary markets that are not considered active. The fair value of the Term Loan is estimated using dealer quotes for identical assets or liabilities in markets that are not considered active. Consequently, the Company's long-term debt is classified as Level 2 within the fair value hierarchy.

At June 30, 2013, the carrying value of the Company's long-term debt was $3,723.1 million, excluding $4.6 million in unamortized premium and $3.3 million in unamortized discount.

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Recent Accounting Pronouncements

6 Months Ended

Jun. 30, 2013

Recent Accounting Pronouncements [Abstract]

Recent Accounting Pronouncements

Recent Accounting Pronouncements

Disclosure of the Effects of Reclassifications from Accumulated Other Comprehensive Income

In February 2013, the Financial Accounting Standards Board issued Accounting Standards Update 2013-02, which required that the effects of significant reclassifications from accumulated other comprehensive income to net income be shown parenthetically on the face of the consolidated financial statements or disclosed in a note. The adoption of this new guidance on January 1, 2013 did not have an impact on the Company's consolidated financial position, results of operations or cash flows.

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Earnings per Share (Details) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share [Abstract]
Weighted Average Number of Shares Outstanding, Basic	145.3	145.1	145.2	145.0
Weighted Average Number Diluted Shares Outstanding Adjustment	1.4	0.7	1.3	0.8
Weighted Average Number of Shares Outstanding, Diluted	146.7	145.8	146.5	145.8
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0	0	0

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Inventory Financing Agreements (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Inventory Financing Agreements [Line Items]
Accounts payable-inventory financing	$ 282,500,000	$ 249,200,000
Accounts Payable, Inventory Financing [Member]
Inventory Financing Agreements [Line Items]
Revolving Loan inventory financing agreement	280,500,000	248,300,000
Other inventory financing agreements	2,000,000	900,000
Accounts payable-inventory financing	282,500,000	249,200,000
Floorplan sub-facility	400,000,000
Other inventory financing agreements, current	$ 2,000,000	$ 900,000

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Long-Term Debt -Interest Rate Caps (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Dec. 31, 2011
Derivative [Line Items]
Interest Rate Cap, fair value	$ 0.2	$ 0.1
Cap agreement effective January 14, 2013-2015 [Member]
Derivative [Line Items]
Interest Rate Cap, number of agreements	10
Interest Rate Cap, notional amount	1,150.0
Interest Rate Cap Purchased During 2011 [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivative Instruments Not Designated as Hedging Instruments	500.0
Interest Rate Cap, cap rate	3.50%
Interest Rate Cap Purchased During 2012 [Member]
Derivative [Line Items]
Notional Amount of Interest Rate Derivative Instruments Not Designated as Hedging Instruments	650.0
Interest Rate Cap, cap rate	1.50%
Senior Notes, due 2015 [Member]
Derivative [Line Items]
Debt, short-term and long-term	$ 0	$ 0	$ 129.0

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Long-Term Debt -Fair Value of Long-Term Debt (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Feb. 17, 2012
2019 Senior Notes, due 2019 [Member]
Fair Value [Line Items]
Debt, short-term and long-term	$ 1,305.0	$ 1,305.0
Premium, unamortized	4.6	5.0	5.7
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value [Line Items]
Debt, short-term and long-term	3,723.1
Fair Value, Inputs, Level 2 [Member]
Fair Value [Line Items]
Long-term Debt, fair value disclosures	$ 3,899.9

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Supplemental Guarantor Information -Consolidating Statements of Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Supplemental Guarantor Information [Line Items]
Net sales	$ 2,779.3	$ 2,584.7	$ 5,191.0	$ 4,903.9
Cost of sales	2,327.7	2,157.8	4,337.4	4,092.4
Gross Profit	451.6	426.9	853.6	811.5
Selling and administrative expenses	266.4	259.5	517.9	511.1
Advertising expense	31.6	31.0	62.0	60.4
Income from operations	153.6	136.4	273.7	240.0
Interest Expense	(70.3)	(76.9)	(142.4)	(155.8)
Net loss on extinguishments of long-term debt	(10.3)	0	(14.2)	(9.4)
Other income (loss), net	0.2	0.2	0.6	0
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	73.2	59.7	117.7	74.8
Income Tax Expense (Benefit)	(26.5)	(22.9)	(42.7)	(27.1)
Net income (loss)	46.7	36.8	75.0	47.7
Parent Guarantor [Member]
Supplemental Guarantor Information [Line Items]
Net sales	0	0	0	0
Cost of sales	0	0	0	0
Gross Profit	0	0	0	0
Selling and administrative expenses	0	0	0	0
Advertising expense	0	0	0	0
Income from operations	0	0	0	0
Interest Expense	0	0	0	0
Net loss on extinguishments of long-term debt	0	0	0	0
Management Fee Income (Expense)	0	0	0	0
Other income (loss), net	0	0	0	0
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	0	0	0	0
Income Tax Expense (Benefit)	0	0	0	0
Income (Loss) before equity in earnings (loss) of subsidiaries	0	0	0	0
Equity in Earnings (Loss) of Subsidiaries	46.7	36.8	75.0	47.7
Net income (loss)	46.7	36.8	75.0	47.7
Subsidiary Issuer [Member]
Supplemental Guarantor Information [Line Items]
Net sales	0	0	0	0
Cost of sales	0	0	0	0
Gross Profit	0	0	0	0
Selling and administrative expenses	27.6	27.0	53.3	52.8
Advertising expense	0	0	0	0
Income from operations	(27.6)	(27.0)	(53.3)	(52.8)
Interest Expense	(70.4)	(76.9)	(142.6)	(156.1)
Net loss on extinguishments of long-term debt	(10.3)	0	(14.2)	(9.4)
Management Fee Income (Expense)	1.6	0.8	2.5	2.2
Other income (loss), net	(0.2)	0.2	(0.2)	(0.1)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(106.9)	(102.9)	(207.8)	(216.2)
Income Tax Expense (Benefit)	39.8	41.0	77.5	89.8
Income (Loss) before equity in earnings (loss) of subsidiaries	(67.1)	(61.9)	(130.3)	(126.4)
Equity in Earnings (Loss) of Subsidiaries	113.8	98.7	205.3	174.1
Net income (loss)	46.7	36.8	75.0	47.7
Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Net sales	2,662.0	2,471.9	4,951.8	4,684.9
Cost of sales	2,225.4	2,059.2	4,127.5	3,901.2
Gross Profit	436.6	412.7	824.3	783.7
Selling and administrative expenses	230.1	224.1	446.8	441.3
Advertising expense	30.6	29.9	60.2	58.5
Income from operations	175.9	158.7	317.3	283.9
Interest Expense	0	0	0	0.3
Net loss on extinguishments of long-term debt	0	0	0	0
Management Fee Income (Expense)	0	0	0	0
Other income (loss), net	0.3	0	0.6	0.1
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	176.2	158.7	317.9	284.3
Income Tax Expense (Benefit)	(65.6)	(62.9)	(118.6)	(115.1)
Income (Loss) before equity in earnings (loss) of subsidiaries	110.6	95.8	199.3	169.2
Equity in Earnings (Loss) of Subsidiaries	0	0	0	0
Net income (loss)	110.6	95.8	199.3	169.2
Non-Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Net sales	117.3	112.8	239.2	219.0
Cost of sales	102.3	98.6	209.9	191.2
Gross Profit	15.0	14.2	29.3	27.8
Selling and administrative expenses	8.7	8.4	17.8	17.0
Advertising expense	1.0	1.1	1.8	1.9
Income from operations	5.3	4.7	9.7	8.9
Interest Expense	0.1	0	0.2	0
Net loss on extinguishments of long-term debt	0	0	0	0
Management Fee Income (Expense)	(1.6)	(0.8)	(2.5)	(2.2)
Other income (loss), net	0.1	0	0.2	0
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	3.9	3.9	7.6	6.7
Income Tax Expense (Benefit)	(0.7)	(1.0)	(1.6)	(1.8)
Income (Loss) before equity in earnings (loss) of subsidiaries	3.2	2.9	6.0	4.9
Equity in Earnings (Loss) of Subsidiaries	0	0	0	0
Net income (loss)	3.2	2.9	6.0	4.9
Co-Issuer [Member]
Supplemental Guarantor Information [Line Items]
Net sales	0	0	0	0
Cost of sales	0	0	0	0
Gross Profit	0	0	0	0
Selling and administrative expenses	0	0	0	0
Advertising expense	0	0	0	0
Income from operations	0	0	0	0
Interest Expense	0	0	0	0
Net loss on extinguishments of long-term debt	0	0	0	0
Management Fee Income (Expense)	0	0	0	0
Other income (loss), net	0	0	0	0
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	0	0	0	0
Income Tax Expense (Benefit)	0	0	0	0
Income (Loss) before equity in earnings (loss) of subsidiaries	0	0	0	0
Equity in Earnings (Loss) of Subsidiaries	0	0	0	0
Net income (loss)	0	0	0	0
Consolidating Adjustments [Member]
Supplemental Guarantor Information [Line Items]
Net sales	0	0	0	0
Cost of sales	0	0	0	0
Gross Profit	0	0	0	0
Selling and administrative expenses	0	0	0	0
Advertising expense	0	0	0	0
Income from operations	0	0	0	0
Interest Expense	0	0	0	0
Net loss on extinguishments of long-term debt	0	0	0	0
Management Fee Income (Expense)	0	0	0	0
Other income (loss), net	0	0	0	0
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	0	0	0	0
Income Tax Expense (Benefit)	0	0	0	0
Income (Loss) before equity in earnings (loss) of subsidiaries	0	0	0	0
Equity in Earnings (Loss) of Subsidiaries	(160.5)	(135.5)	(280.3)	(221.8)
Net income (loss)	(160.5)	(135.5)	(280.3)	(221.8)
Consolidated [Member]
Supplemental Guarantor Information [Line Items]
Net sales	2,779.3	2,584.7	5,191.0	4,903.9
Cost of sales	2,327.7	2,157.8	4,337.4	4,092.4
Gross Profit	451.6	426.9	853.6	811.5
Selling and administrative expenses	266.4	259.5	517.9	511.1
Advertising expense	31.6	31.0	62.0	60.4
Income from operations	153.6	136.4	273.7	240.0
Interest Expense	(70.3)	(76.9)	(142.4)	(155.8)
Net loss on extinguishments of long-term debt	(10.3)	0	(14.2)	(9.4)
Management Fee Income (Expense)	0	0	0	0
Other income (loss), net	0.2	0.2	0.6	0
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	73.2	59.7	117.7	74.8
Income Tax Expense (Benefit)	(26.5)	(22.9)	(42.7)	(27.1)
Income (Loss) before equity in earnings (loss) of subsidiaries	46.7	36.8	75.0	47.7
Equity in Earnings (Loss) of Subsidiaries	0	0	0	0
Net income (loss)	$ 46.7	$ 36.8	$ 75.0	$ 47.7

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Consolidated Balance Sheets Parenthetical (Parentheticals) (USD $) In Millions, except Per Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Allowance for doubtful accounts	$ 5.4	$ 5.4
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	100.0	0
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	1,000.0	286.1
Common shares, shares issued	145.2	145.2
Common shares, shares outstanding	145.2	145.1

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Equity-Based Compensation

6 Months Ended

Jun. 30, 2013

Equity-Based Compensation [Abstract]

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

Equity-Based Compensation

The Company recognized $2.1 million and $5.8 million in equity-based compensation expense for the three months ended June 30, 2013 and 2012, respectively, and $4.0 million and $11.5 million in equity-based compensation expense for the six months ended June 30, 2013 and 2012, respectively. Equity-based compensation expense for the three and six months ended June 30, 2012 included incremental expense of $1.7 million and $3.3 million, respectively, related to a modified Class B Common Unit grant agreement with the Company's former chief executive officer.

In June 2013, the Company adopted the 2013 Long-Term Incentive Plan (the "2013 LTIP"). The 2013 LTIP provides for the grant of incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock, restricted stock units, bonus stock and performance awards. The maximum aggregate number of shares that may be issued under the 2013 LTIP is 11,700,000 shares of the Company's common stock, in addition to the 3,798,508 shares of restricted stock granted to replace unvested B Units in connection with the Company's IPO, as discussed below.

On July 2, 2013, the Company completed an IPO of its common shares. In connection with the IPO, CDW Holdings distributed all of its shares of the Company's common stock to its existing members in accordance with their respective membership interests. Common stock received by holders of B Units in connection with the distribution is subject to any vesting provisions previously applicable to the holder's B Units. B Unit holders received 3,798,508 shares of restricted stock with respect to B Units that had not yet vested at the time of the distribution. In addition, the Company issued approximately 1.3 million stock options to the B Unit holders to preserve their fully-diluted equity ownership percentage. These options were issued with an exercise price equal to the IPO price per share and are also subject to the same vesting provisions as the B Units to which they relate. The unvested stock options and shares of restricted stock generally vest between December 31, 2014 and January 20, 2018.

Under the terms of the MPK Incentive Plan II (the "MPK Plan"), vesting accelerated for all unvested units upon completion of the IPO. The Company anticipates recording a pre-tax charge of $36.7 million related to the acceleration of the expense recognition for MPK units in the third quarter of 2013. In connection with the completion of the IPO, the Company distributed common stock to each participant and withheld the number of shares of common stock equal to the required tax withholding for each participant. In June 2013, the Company paid required withholding taxes of $23.3 million to federal and state taxing authorities. This amount is included within prepaid expenses and other on the consolidated balance sheet at June 30, 2013 and is reported as a financing activity in the consolidated statement of cash flows for the six months ended June 30, 2013. In addition, the Company paid $4.0 million of employer payroll taxes that are included as an operating activity in the consolidated statement of cash flows for the six months ended June 30, 2013.

In connection with the IPO, the Company granted approximately 1.4 million restricted stock units under the 2013 LTIP. The restricted stock units granted vest at the end of four years.

See Note 13 for additional discussion of the Company's IPO.

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Consolidated Statements Of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Net income (loss)	$ 46.7	$ 36.8	$ 75.0	$ 47.7
Foreign currency translation adjustment	(3.3)	(1.6)	(5.7)	0.3
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(3.3)	(1.6)	(5.7)	0.3
Comprehensive income (loss)	$ 43.4	$ 35.2	$ 69.3	$ 48.0

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Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 179.3	$ 37.9
Accounts receivable, net of allowance for doubtful accounts	1,390.5	1,285.0
Merchandise inventory	378.5	314.6
Miscellaneous receivables	165.1	148.5
Deferred income taxes	12.1	14.1
Prepaid expenses and other	108.2	34.6
Total current assets	2,233.7	1,834.7
Property and equipment, net	132.7	142.7
Goodwill	2,207.4	2,209.3
Other intangible assets, net	1,403.7	1,478.5
Deferred financing costs, net	41.4	53.2
Other assets	1.6	1.6
Total assets	6,020.5	5,720.0
Current liabilities:
Accounts payable-trade	771.0	518.6
Accounts payable-inventory financing	282.5	249.2
Current maturities of long-term debt	13.5	40.0
Deferred revenue	96.9	57.8
Accrued expenses:
Compensation	93.7	99.4
Interest	47.0	50.7
Sales taxes	20.2	22.6
Advertising	23.7	33.9
Income taxes	5.6	0.2
Other	91.1	95.8
Total current liabilities	1,445.2	1,168.2
Long-term liabilities:
Debt	3,710.9	3,731.0
Deferred income taxes	598.3	624.3
Other Accrued Interest	6.4	8.0
Other liabilities	50.7	52.0
Total long-term liabilities	4,366.3	4,415.3
Commitments and contingencies
Shareholders' equity (deficit):
Preferred Stock, Value, Issued	0	0
Common shares	1.4	1.4
Paid-in capital	2,211.0	2,207.7
Accumulated deficit	(1,998.1)	(2,073.0)
Accumulated other comprehensive loss	(5.3)	0.4
Total shareholders' equity (deficit)	209.0	136.5
Total liabilities and shareholders' equity (deficit)	$ 6,020.5	$ 5,720.0

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Long-Term Debt -Debt Balances and Interest Rates (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2013 Revolving Loan [Member]		Dec. 31, 2012 Revolving Loan [Member]	Jun. 30, 2013 Term Loan [Member]		Apr. 29, 2013 Term Loan [Member]	Dec. 31, 2012 Term Loan [Member]	Jul. 02, 2013 Senior Secured Notes, due 2018 [Member]	Jun. 30, 2013 Senior Secured Notes, due 2018 [Member]		Dec. 31, 2012 Senior Secured Notes, due 2018 [Member]	Jun. 30, 2013 2019 Senior Notes, due 2019 [Member]		Dec. 31, 2012 2019 Senior Notes, due 2019 [Member]	Feb. 17, 2012 2019 Senior Notes, due 2019 [Member]	Jun. 30, 2013 Senior Subordinated Notes [Member]		Dec. 31, 2012 Senior Subordinated Notes [Member]	Jun. 30, 2013 Senior Notes, due 2015 [Member]		Dec. 31, 2012 Senior Notes, due 2015 [Member]	Dec. 31, 2011 Senior Notes, due 2015 [Member]
Debt Instrument [Line Items]
Debt, short-term and long-term			$ 0		$ 0	$ 1,346.6			$ 1,339.5	$ 325.0	$ 500.0		$ 500.0	$ 1,305.0		$ 1,305.0		$ 571.5		$ 621.5	$ 0		$ 0	$ 129.0
Debt Instrument, Unamortized Discount						(3.3)		3.4	0
Premium, unamortized														4.6		5.0	5.7
Debt, total short-term and long-term	3,724.4	3,771.0
Current maturities of long-term debt	(13.5)	(40.0)
Debt	$ 3,710.9	$ 3,731.0
Long-term Debt, weighted average interest rate			0.00%	[1]		3.50%	[1]				8.00%	[1]		8.50%	[1]			12.535%	[1]		0.00%	[1]

[1] Weighted-average interest rate at June 30, 2013

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Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2013

Long-term Debt, Unclassified [Abstract]

Carrying Value of Long-Term Debt

Long-term debt was as follows:

(dollars in millions)	Interest Rate (1)		June 30, 2013			December 31, 2012
Senior secured asset-based revolving credit facility	—	%	$	—		$	—
Senior secured term loan facility	3.5	%	1,346.6			1,339.5
Unamortized discount on senior secured term loan facility			(3.3		)	—
Senior secured notes due 2018	8.0	%	500.0			500.0
Senior notes due 2019	8.5	%	1,305.0			1,305.0
Unamortized premium on senior notes due 2019			4.6			5.0
Senior subordinated notes due 2017	12.535	%	571.5			621.5
Senior notes due 2015	—	%	—			—
Total long-term debt			3,724.4			3,771.0
Less current maturities of long-term debt			(13.5		)	(40.0		)
Long-term debt, excluding current maturities			$	3,710.9		$	3,731.0

(1)Weighted-average interest rate at June 30, 2013.

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Supplemental Guarantor Information -Condensed Consolidating Balance Sheets (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	$ 179.3	$ 37.9	$ 158.7	$ 99.9
Accounts receivable, net of allowance for doubtful accounts	1,390.5	1,285.0
Merchandise inventory	378.5	314.6
Miscellaneous receivables	165.1	148.5
Deferred income taxes	12.1	14.1
Prepaid expenses and other	108.2	34.6
Total current assets	2,233.7	1,834.7
Property and equipment, net	132.7	142.7
Goodwill	2,207.4	2,209.3
Other intangible assets, net	1,403.7	1,478.5
Deferred financing costs, net	41.4	53.2
Other assets	1.6	1.6
Total assets	6,020.5	5,720.0
Accounts payable-trade	771.0	518.6
Accounts payable-inventory financing	282.5	249.2
Current maturities of long-term debt	13.5	40.0
Deferred revenue	96.9	57.8
Total current liabilities	1,445.2	1,168.2
Debt	3,710.9	3,731.0
Deferred income taxes	598.3	624.3
Other Accrued Interest	6.4	8.0
Other liabilities	50.7	52.0
Total long-term liabilities	4,366.3	4,415.3
Total shareholders' equity (deficit)	209.0	136.5
Total liabilities and shareholders' equity (deficit)	6,020.5	5,720.0
Parent Guarantor [Member]
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	0	0	0	0
Accounts receivable, net of allowance for doubtful accounts	0	0
Merchandise inventory	0	0
Miscellaneous receivables	0	0
Deferred income taxes	0	0
Prepaid expenses and other	0	0
Total current assets	0	0
Property and equipment, net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Deferred financing costs, net	0	0
Other assets	5.2	5.4
Investment from and advances to subsidiaries	203.8	131.1
Total assets	209.0	136.5
Accounts payable-trade	0	0
Accounts payable-inventory financing	0	0
Current maturities of long-term debt	0	0
Deferred revenue	0	0
Accrued Expenses	0	0
Total current liabilities	0	0
Debt	0	0
Deferred income taxes	0	0
Other Accrued Interest	0	0
Other liabilities	0	0
Total long-term liabilities	0	0
Total shareholders' equity (deficit)	209.0	136.5
Total liabilities and shareholders' equity (deficit)	209.0	136.5
Subsidiary Issuer [Member]
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	142.0	48.0	142.2	102.1
Accounts receivable, net of allowance for doubtful accounts	0	0
Merchandise inventory	0	0
Miscellaneous receivables	55.4	61.7
Deferred income taxes	8.5	8.7
Prepaid expenses and other	24.0	10.1
Total current assets	229.9	128.5
Property and equipment, net	69.4	73.9
Goodwill	749.4	749.4
Other intangible assets, net	343.9	348.6
Deferred financing costs, net	41.4	53.2
Other assets	1.5	1.1
Investment from and advances to subsidiaries	2,892.0	2,946.0
Total assets	4,327.5	4,300.7
Accounts payable-trade	20.6	16.5
Accounts payable-inventory financing	0	0
Current maturities of long-term debt	13.5	40.0
Deferred revenue	0	0
Accrued Expenses	136.4	139.3
Total current liabilities	170.5	195.8
Debt	3,710.9	3,731.0
Deferred income taxes	189.8	188.1
Other Accrued Interest	6.4	8.0
Other liabilities	46.1	46.7
Total long-term liabilities	3,953.2	3,973.8
Total shareholders' equity (deficit)	203.8	131.1
Total liabilities and shareholders' equity (deficit)	4,327.5	4,300.7
Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	11.2	0	22.1	15.8
Accounts receivable, net of allowance for doubtful accounts	1,335.2	1,217.7
Merchandise inventory	376.2	313.2
Miscellaneous receivables	103.3	82.0
Deferred income taxes	3.7	5.5
Prepaid expenses and other	83.6	24.4
Total current assets	1,913.2	1,642.8
Property and equipment, net	61.1	66.2
Goodwill	1,428.5	1,428.5
Other intangible assets, net	1,052.5	1,121.7
Deferred financing costs, net	0	0
Other assets	0.1	0.4
Investment from and advances to subsidiaries	0	0
Total assets	4,455.4	4,259.6
Accounts payable-trade	725.2	500.3
Accounts payable-inventory financing	282.5	249.2
Current maturities of long-term debt	0	0
Deferred revenue	96.5	57.8
Accrued Expenses	138.9	157.4
Total current liabilities	1,243.1	964.7
Debt	0	0
Deferred income taxes	412.1	440.0
Other Accrued Interest	0	0
Other liabilities	3.6	4.0
Total long-term liabilities	415.7	444.0
Total shareholders' equity (deficit)	2,796.6	2,850.9
Total liabilities and shareholders' equity (deficit)	4,455.4	4,259.6
Non-Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	26.2	9.8	21.2	8.1
Accounts receivable, net of allowance for doubtful accounts	55.3	67.3
Merchandise inventory	2.3	1.4
Miscellaneous receivables	6.4	4.8
Deferred income taxes	(0.1)	(0.1)
Prepaid expenses and other	0.6	0.1
Total current assets	90.7	83.3
Property and equipment, net	2.2	2.6
Goodwill	29.5	31.4
Other intangible assets, net	7.3	8.2
Deferred financing costs, net	0	0
Other assets	0.6	0.6
Investment from and advances to subsidiaries	0	0
Total assets	130.3	126.1
Accounts payable-trade	25.3	21.7
Accounts payable-inventory financing	0	0
Current maturities of long-term debt	0	0
Deferred revenue	0.4	0
Accrued Expenses	6.0	5.9
Total current liabilities	31.7	27.6
Debt	0	0
Deferred income taxes	1.6	1.7
Other Accrued Interest	0	0
Other liabilities	1.6	1.7
Total long-term liabilities	3.2	3.4
Total shareholders' equity (deficit)	95.4	95.1
Total liabilities and shareholders' equity (deficit)	130.3	126.1
Co-Issuer [Member]
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	0	0	0	0
Accounts receivable, net of allowance for doubtful accounts	0	0
Merchandise inventory	0	0
Miscellaneous receivables	0	0
Deferred income taxes	0	0
Prepaid expenses and other	0	0
Total current assets	0	0
Property and equipment, net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Deferred financing costs, net	0	0
Other assets	0	0
Investment from and advances to subsidiaries	0	0
Total assets	0	0
Accounts payable-trade	0	0
Accounts payable-inventory financing	0	0
Current maturities of long-term debt	0	0
Deferred revenue	0	0
Accrued Expenses	0	0
Total current liabilities	0	0
Debt	0	0
Deferred income taxes	0	0
Other Accrued Interest	0	0
Other liabilities	0	0
Total long-term liabilities	0	0
Total shareholders' equity (deficit)	0	0
Total liabilities and shareholders' equity (deficit)	0	0
Consolidating Adjustments [Member]
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	(0.1)	(19.9)	(26.8)	(26.1)
Accounts receivable, net of allowance for doubtful accounts	0	0
Merchandise inventory	0	0
Miscellaneous receivables	0	0
Deferred income taxes	0	0
Prepaid expenses and other	0	0
Total current assets	(0.1)	(19.9)
Property and equipment, net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Deferred financing costs, net	0	0
Other assets	(5.8)	(5.9)
Investment from and advances to subsidiaries	(3,095.8)	(3,077.1)
Total assets	(3,101.7)	(3,102.9)
Accounts payable-trade	(0.1)	(19.9)
Accounts payable-inventory financing	0	0
Current maturities of long-term debt	0	0
Deferred revenue	0	0
Accrued Expenses	0	0
Total current liabilities	(0.1)	(19.9)
Debt	0	0
Deferred income taxes	(5.2)	(5.5)
Other Accrued Interest	0	0
Other liabilities	(0.6)	(0.4)
Total long-term liabilities	(5.8)	(5.9)
Total shareholders' equity (deficit)	(3,095.8)	(3,077.1)
Total liabilities and shareholders' equity (deficit)	(3,101.7)	(3,102.9)
Consolidated [Member]
Supplemental Guarantor Information [Line Items]
Cash and cash equivalents	179.3	37.9	158.7	99.9
Accounts receivable, net of allowance for doubtful accounts	1,390.5	1,285.0
Merchandise inventory	378.5	314.6
Miscellaneous receivables	165.1	148.5
Deferred income taxes	12.1	14.1
Prepaid expenses and other	108.2	34.6
Total current assets	2,233.7	1,834.7
Property and equipment, net	132.7	142.7
Goodwill	2,207.4	2,209.3
Other intangible assets, net	1,403.7	1,478.5
Deferred financing costs, net	41.4	53.2
Other assets	1.6	1.6
Investment from and advances to subsidiaries	0	0
Total assets	6,020.5	5,720.0
Accounts payable-trade	771.0	518.6
Accounts payable-inventory financing	282.5	249.2
Current maturities of long-term debt	13.5	40.0
Deferred revenue	96.9	57.8
Accrued Expenses	281.3	302.6
Total current liabilities	1,445.2	1,168.2
Debt	3,710.9	3,731.0
Deferred income taxes	598.3	624.3
Other Accrued Interest	6.4	8.0
Other liabilities	50.7	52.0
Total long-term liabilities	4,366.3	4,415.3
Total shareholders' equity (deficit)	209.0	136.5
Total liabilities and shareholders' equity (deficit)	$ 6,020.5	$ 5,720.0

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Shareholders' Equity (Details) (USD $)	1 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Shareholders' Equity [Abstract]
Stockholders' Equity Note, Stock Split, Conversion Ratio	143.0299613
Common shares, par value	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	100,000,000	0
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Outstanding	0	0
Preferred Stock, Shares Issued	0	0
Common shares, shares authorized	1,000,000,000	286,100,000

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Long-Term Debt -Senior Notes (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended		1 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Feb. 29, 2012 2019 Senior Notes, due 2019 [Member]	Jun. 30, 2013 2019 Senior Notes, due 2019 [Member]	Dec. 31, 2012 2019 Senior Notes, due 2019 [Member]	Feb. 17, 2012 2019 Senior Notes, due 2019 [Member]
Debt Instrument [Line Items]
Proceeds from Issuance of long-term Debt	$ 1,346.6	$ 135.7	$ 130.0
Long-term Debt, stated interest rate				8.50%
Premium, percentage of par value						104.375%
Debt, short-term and long-term				1,305.0	1,305.0
Premium, unamortized				$ 4.6	$ 5.0	$ 5.7

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Long-Term Debt Senior Subordinated Notes (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Senior Subordinated Notes [Member]	Mar. 08, 2013 Senior Subordinated Notes [Member]	Dec. 31, 2012 Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Long-term Debt, stated interest rate					12.535%
Debt, short-term and long-term					$ 571,500,000		$ 621,500,000
Senior Subordinated Notes, repurchased amount						50,000,000
Redemption Premium, percentage of par value						106.268%
Extinguishment of Debt, Fees Paid to Lenders						3,100,000
Write off of unamortized deferred financing costs					800,000
Extinguishment of Debt, Accrued Interest Paid to Lenders						2,500,000
Net loss on extinguishments of long-term debt	$ 10,300,000	$ 0	$ 14,200,000	$ 9,400,000	$ 3,900,000

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Shareholders' Equity (Notes)

6 Months Ended

Jun. 30, 2013

Shareholders' Equity [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

Shareholders' Equity

In June 2013, the Company’s Board of Directors and the Company's sole shareholder at that time, CDW Holdings, approved the reclassification of the Company’s Class A common shares and Class B common shares into a single class of common shares and a 143.0299613-for-1 stock split, effective immediately. The par value of the common shares was maintained at $0.01 per share. All references to common shares and per share amounts in the accompanying consolidated financial statements have been adjusted to reflect the reclassification and stock split on a retroactive basis.

In June 2013, the Company amended and restated its certificate of incorporation to authorize the issuance of 100,000,000 shares of preferred stock with a par value of $0.01. No shares of preferred stock have been issued or are outstanding as of June 30, 2013. Additionally, the amended and restated certificate of incorporation increased the number of authorized common shares to 1,000,000,000.

On July 2, 2013, the Company completed an IPO of its common shares. See Note 13 for additional discussion of the Company's IPO.

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Long-Term Debt -Revolving Loan (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Revolving Loan [Member]
Debt Instrument [Line Items]
Debt, short-term and long-term	$ 0	$ 0
Floorplan sub-facility, reserve	267,400,000
Revolving Commitment	900,000,000
Revolving loan financing agreement, percentage reserve for open orders	15.00%
Borrowing Base	1,098,800,000
Availability under Revolving Loan	631,400,000
Letter of Credit [Member]
Debt Instrument [Line Items]
Undrawn letters of credit	1,200,000
Accounts Payable, Inventory Financing [Member]
Debt Instrument [Line Items]
Floorplan sub-facility, reserve	8,800,000
Floorplan sub-facility, amount owed	258,600,000
Floorplan sub-facility, variation between balance in financials and balance per financial intermediary due to timing differences in reporting	$ 21,900,000

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Deferred Compensation Plan (Details) (USD $)	3 Months Ended			6 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Apr. 30, 2013	Dec. 31, 2012	Aug. 01, 2013 Senior Subordinated Notes [Member]	Mar. 10, 2010 Senior Subordinated Notes [Member]	Jun. 30, 2013 2013 through 2014 [Member]	Jun. 30, 2013 2015 through 2017 [Member]
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Debt Instrument, Repurchased Face Amount								$ 324,000,000	$ 28,500,000
RDU Plan, units authorized for issuance		28,500		28,500
RDU Plan, units outstanding		26,549		26,549
Deferred Compensation Arrangement with Individual, Requisite Service Period				P3Y0M0D
Deferred Compensation Arrangement with Individual, Distributions Paid						1,700,000
Charge for payment of RDU Plan cash retention pool	7,500,000
RDU Plan, unrecognized compensation expense										21,000,000	7,000,000
RDU Plan, compensation expense		2,200,000	2,100,000	4,300,000	4,200,000
RDU Plan, liability		$ 18,100,000		$ 18,100,000			$ 15,500,000

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Deferred Compensation Plan

6 Months Ended

Jun. 30, 2013

Deferred Compensation Plan [Abstract]

Deferred Compensation Plan

Deferred Compensation Plan

On March 10, 2010, in connection with the Company's purchase of $28.5 million principal amount of its outstanding senior subordinated debt, the Company established the Restricted Debt Unit Plan (the “RDU Plan”), an unfunded nonqualified deferred compensation plan. The total number of RDUs that can be granted under the RDU Plan is 28,500. As of June 30, 2013, 26,549 RDUs were outstanding. RDUs that are outstanding vest daily on a pro rata basis over the three-year period from January 1, 2012 (or, if later, the date of hire or the date of a subsequent RDU grant) through December 31, 2014. 

The total amount of compensation available to be paid under the RDU Plan is based on two components, a principal component and an interest component. Participants have no rights to the underlying debt. The principal component credits the RDU Plan with an amount equal to the $28.5 million face value of the Company's Senior Subordinated Notes (the “Debt Pool”). Payment of the principal component of the RDU Plan is expected to be made on October 12, 2017, unless accelerated due to a sale of the Company. By December 31, 2014, amounts accrued under the RDU Plan are expected to equal the present value of the principal component, plus any accrued unpaid interest thereon. The interest component credits the RDU Plan with amounts equal to the interest that would have been earned on the Debt Pool from March 10, 2010 through maturity on October 12, 2017 as discussed below. Interest amounts for 2010 and 2011 were deferred until 2012, and thereafter, interest amounts were paid to participants semi-annually on the interest payment due dates. Payments totaling $1.7 million were made to participants under the RDU Plan in April 2013 in connection with the semi-annual interest payment due.

As described in Note 13, the Company used a portion of the IPO proceeds together with incremental borrowings to redeem $324.0 million of the total Senior Subordinated Notes outstanding on August 1, 2013. In accordance with the terms of the RDU Plan, upon redemption of Senior Subordinated Notes, the RDUs cease to accrue the related interest component credits. The Company expects to give participants the opportunity to share on a pro rata basis in cash retention pools that will be payable to participants who satisfy certain retention requirements. The aggregate amount of the retention pools will be determined based on the amount of interest component credits that would have been allocated to the RDU Plan if the Senior Subordinated Notes remained outstanding through maturity. The Company expects to record a pre-tax charge of $7.5 million in the third quarter of 2013 for payment of the first cash retention pool. Including this charge, unrecognized compensation expense as of June 30, 2013 of approximately $21 million is expected to be recognized through 2014 and approximately $7 million in 2015 through 2017. Payments under the RDU Plan may be impacted if certain significant events occur or circumstances change that would impact the financial condition or structure of the Company.

Compensation expense of $2.2 million and $2.1 million related to the RDU Plan was recognized for the three months ended June 30, 2013 and 2012, respectively, and $4.3 million and $4.2 million for the six months ended June 30, 2013 and 2012, respectively. At June 30, 2013 and December 31, 2012, the Company had $18.1 million and $15.5 million of liabilities related to the RDU Plan recorded on the consolidated balance sheets, respectively.

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Income Taxes

6 Months Ended

Jun. 30, 2013

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The Company's effective income tax rate was 36.2% and 38.4% for the three months ended June 30, 2013 and 2012, respectively, and 36.3% and 36.2% for the six months ended June 30, 2013 and 2012, respectively.  

For the three months ended June 30, 2013, the Company's effective tax rate differed from the U.S. federal statutory rate primarily due to state income taxes. The effective tax rate for the three months ended June 30, 2012 differed from the U.S. federal statutory rate primarily due to state income taxes and non-deductible expenses, primarily equity-based compensation and meals and entertainment. The non-deductible expenses had a greater impact on the effective tax rate for the three months ended June 30, 2012 than for the three months ended June 30, 2013.

For the six months ended June 30, 2013, the Company's effective tax rate differed from the U.S. federal statutory rate primarily due to state income taxes. The effective tax rate for the six months ended June 30, 2012 also differed from the U.S. federal statutory rate primarily due to state income taxes. While the non-deductible expenses had a greater impact on the effective tax rate for the six months ended June 30, 2012 than for the six months ended June 30, 2013, the effect was offset by additional state tax credits that were recorded in the first three months of 2012.

In the ordinary course of business, the Company is subject to review by domestic and foreign taxing authorities, including the Internal Revenue Service (“IRS”). In general, the Company is no longer subject to audit by the IRS for tax years through 2010 and state, local or foreign taxing authorities for tax years through 2007. Various taxing authorities are in the process of auditing income tax returns of the Company and its subsidiaries. The Company does not anticipate that any adjustments from the audits would have a material impact on its consolidated financial position, results of operations or cash flows.

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Consolidated Statements Of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income (loss)	$ 75.0	$ 47.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	104.3	105.7
Equity-based compensation expense	4.0	11.5
Deferred income taxes	(23.5)	(32.0)
Amortization of deferred financing costs and debt premium	5.3	8.0
Net loss on extinguishments of long-term debt	14.2	9.4
Other	0	0.9
Changes in assets and liabilities:
Accounts receivable	(108.9)	19.8
Merchandise inventory	(64.0)	0.1
Other assets	(67.2)	(45.3)
Accounts payable-trade	253.8	170.5
Other current liabilities	17.8	9.2
Long-term liabilities	(3.7)	(0.8)
Net cash provided by operating activities	207.1	304.7
Cash flows from investing activities:
Capital expenditures	(20.0)	(15.7)
Net cash used in investing activities	(20.0)	(15.7)
Cash flows from financing activities:
Proceeds from borrowings under revolving credit facility	63.0	256.0
Repayments of borrowings under revolving credit facility	(63.0)	(256.0)
Repayments of long-term debt	(43.4)	(201.0)
Proceeds from Issuance of long-term Debt	1,346.6	135.7
Payments to extinguish long-term debt	(1,352.6)	(136.9)
Payments of debt financing costs	(4.8)	(2.1)
Net change in accounts payable-inventory financing	33.3	(25.5)
Payment of incentive compensation plan withholding taxes	(23.3)	0
Repurchase of Class B common shares	(0.1)	(0.3)
Net cash used in financing activities	(44.3)	(230.1)
Effect of exchange rate changes on cash and cash equivalents	(1.4)	(0.1)
Net increase (decrease) in cash and cash equivalents	141.4	58.8
Cash and cash equivalents - beginning of period	37.9	99.9
Cash and cash equivalents - end of period	179.3	158.7
Supplementary disclosure of cash flow information:
Interest paid	(142.7)	(151.4)
Taxes paid, net	$ (50.9)	$ (38.4)

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Supplemental Guarantor Information -Condensed Consolidating Statements of Cash Flows (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	$ 207.1	$ 304.7
Capital expenditures	(20.0)	(15.7)
Net cash used in investing activities	(20.0)	(15.7)
Proceeds from borrowings under revolving credit facility	63.0	256.0
Repayments of borrowings under revolving credit facility	(63.0)	(256.0)
Repayments of long-term debt	(43.4)	(201.0)
Proceeds from Issuance of long-term Debt	1,346.6	135.7
Payments to extinguish long-term debt	(1,352.6)	(136.9)
Net change in accounts payable-inventory financing	33.3	(25.5)
Payment of incentive compensation plan withholding taxes	(23.3)	0
Net cash used in financing activities	(44.3)	(230.1)
Effect of exchange rate changes on cash and cash equivalents	(1.4)	(0.1)
Net increase (decrease) in cash and cash equivalents	141.4	58.8
Cash and cash equivalents - beginning of period	37.9	99.9
Cash and cash equivalents - end of period	179.3	158.7
Parent Guarantor [Member]
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	0	0
Capital expenditures	0	0
Net cash used in investing activities	0	0
Proceeds from borrowings under revolving credit facility	0	0
Repayments of borrowings under revolving credit facility	0	0
Repayments of long-term debt	0	0
Proceeds from Issuance of long-term Debt	0	0
Payments to extinguish long-term debt	0	0
Net change in accounts payable-inventory financing	0	0
Payment of incentive compensation plan withholding taxes	0
Advances from (to) affiliates	0	0
Other financing activities	0	0
Net cash used in financing activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents - beginning of period	0	0
Cash and cash equivalents - end of period	0	0
Subsidiary Issuer [Member]
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	(109.5)	(118.3)
Capital expenditures	(18.0)	(8.8)
Net cash used in investing activities	(18.0)	(8.8)
Proceeds from borrowings under revolving credit facility	63.0	256.0
Repayments of borrowings under revolving credit facility	(63.0)	(256.0)
Repayments of long-term debt	(43.4)	(201.0)
Proceeds from Issuance of long-term Debt	1,346.6	135.7
Payments to extinguish long-term debt	(1,352.6)	(136.9)
Net change in accounts payable-inventory financing	0	0
Payment of incentive compensation plan withholding taxes	(3.8)
Advances from (to) affiliates	279.6	371.8
Other financing activities	(4.9)	(2.4)
Net cash used in financing activities	221.5	167.2
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	94.0	40.1
Cash and cash equivalents - beginning of period	48.0	102.1
Cash and cash equivalents - end of period	142.0	142.2
Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	279.1	410.6
Capital expenditures	(2.0)	(6.5)
Net cash used in investing activities	(2.0)	(6.5)
Proceeds from borrowings under revolving credit facility	0	0
Repayments of borrowings under revolving credit facility	0	0
Repayments of long-term debt	0	0
Proceeds from Issuance of long-term Debt	0	0
Payments to extinguish long-term debt	0	0
Net change in accounts payable-inventory financing	33.3	(25.5)
Payment of incentive compensation plan withholding taxes	(19.5)
Advances from (to) affiliates	(279.7)	(372.3)
Other financing activities	0	0
Net cash used in financing activities	(265.9)	(397.8)
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	11.2	6.3
Cash and cash equivalents - beginning of period	0	15.8
Cash and cash equivalents - end of period	11.2	22.1
Non-Guarantor Subsidiaries [Member]
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	17.7	13.1
Capital expenditures	0	(0.4)
Net cash used in investing activities	0	(0.4)
Proceeds from borrowings under revolving credit facility	0	0
Repayments of borrowings under revolving credit facility	0	0
Repayments of long-term debt	0	0
Proceeds from Issuance of long-term Debt	0	0
Payments to extinguish long-term debt	0	0
Net change in accounts payable-inventory financing	0	0
Payment of incentive compensation plan withholding taxes	0
Advances from (to) affiliates	0.1	0.5
Other financing activities	0	0
Net cash used in financing activities	0.1	0.5
Effect of exchange rate changes on cash and cash equivalents	(1.4)	(0.1)
Net increase (decrease) in cash and cash equivalents	16.4	13.1
Cash and cash equivalents - beginning of period	9.8	8.1
Cash and cash equivalents - end of period	26.2	21.2
Co-Issuer [Member]
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	0	0
Capital expenditures	0	0
Net cash used in investing activities	0	0
Proceeds from borrowings under revolving credit facility	0	0
Repayments of borrowings under revolving credit facility	0	0
Repayments of long-term debt	0	0
Proceeds from Issuance of long-term Debt	0	0
Payments to extinguish long-term debt	0	0
Net change in accounts payable-inventory financing	0	0
Payment of incentive compensation plan withholding taxes	0
Advances from (to) affiliates	0	0
Other financing activities	0	0
Net cash used in financing activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	0	0
Cash and cash equivalents - beginning of period	0	0
Cash and cash equivalents - end of period	0	0
Consolidating Adjustments [Member]
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	19.8	(0.7)
Capital expenditures	0	0
Net cash used in investing activities	0	0
Proceeds from borrowings under revolving credit facility	0	0
Repayments of borrowings under revolving credit facility	0	0
Repayments of long-term debt	0	0
Proceeds from Issuance of long-term Debt	0	0
Payments to extinguish long-term debt	0	0
Net change in accounts payable-inventory financing	0	0
Payment of incentive compensation plan withholding taxes	0
Advances from (to) affiliates	0	0
Other financing activities	0	0
Net cash used in financing activities	0	0
Effect of exchange rate changes on cash and cash equivalents	0	0
Net increase (decrease) in cash and cash equivalents	19.8	(0.7)
Cash and cash equivalents - beginning of period	(19.9)	(26.1)
Cash and cash equivalents - end of period	(0.1)	(26.8)
Consolidated [Member]
Supplemental Guarantor Information [Line Items]
Net cash provided by operating activities	207.1	304.7
Capital expenditures	(20.0)	(15.7)
Net cash used in investing activities	(20.0)	(15.7)
Proceeds from borrowings under revolving credit facility	63.0	256.0
Repayments of borrowings under revolving credit facility	(63.0)	(256.0)
Repayments of long-term debt	(43.4)	(201.0)
Proceeds from Issuance of long-term Debt	1,346.6	135.7
Payments to extinguish long-term debt	(1,352.6)	(136.9)
Net change in accounts payable-inventory financing	33.3	(25.5)
Payment of incentive compensation plan withholding taxes	(23.3)
Advances from (to) affiliates	0	0
Other financing activities	(4.9)	(2.4)
Net cash used in financing activities	(44.3)	(230.1)
Effect of exchange rate changes on cash and cash equivalents	(1.4)	(0.1)
Net increase (decrease) in cash and cash equivalents	141.4	58.8
Cash and cash equivalents - beginning of period	37.9	99.9
Cash and cash equivalents - end of period	$ 179.3	$ 158.7

XML

Long-Term Debt -Senior Secured Notes (Details) (Senior Secured Notes, due 2018 [Member], USD $) In Millions, unless otherwise specified	Jul. 02, 2013	Jun. 30, 2013	Dec. 31, 2012
Senior Secured Notes, due 2018 [Member]
Debt Instrument [Line Items]
Long-term Debt, stated interest rate		8.00%
Debt, short-term and long-term	$ 325.0	$ 500.0	$ 500.0

XML

Supplemental Guarantor Information

6 Months Ended

Jun. 30, 2013

Supplemental Guarantor Information [Abstract]

Supplemental Guarantor Information

Supplemental Guarantor Information

The Senior Secured Notes, Senior Notes and Senior Subordinated Notes are guaranteed by Parent and each of CDW LLC’s direct and indirect, 100% owned, domestic subsidiaries (the “Guarantor Subsidiaries”). All guarantees by Parent and Guarantor Subsidiaries are joint and several, and full and unconditional; provided that each guarantee by the Guarantor Subsidiaries is subject to certain customary release provisions contained in the indentures governing the Senior Secured Notes, Senior Notes and Senior Subordinated Notes. CDW LLC's Canada subsidiary (the “Non-Guarantor Subsidiary”) does not guarantee the debt obligations. CDW LLC and CDW Finance Corporation, as co-issuers, are 100% owned by Parent, and each of the Guarantor Subsidiaries and the Non-Guarantor Subsidiary is 100% owned by CDW LLC.

The following tables set forth condensed consolidating balance sheets as of June 30, 2013 and December 31, 2012, consolidating statements of operations for the three and six months ended June 30, 2013 and 2012, condensed consolidating statements of comprehensive income for the three and six months ended June 30, 2013 and 2012, and condensed consolidating statements of cash flows for the six months ended June 30, 2013 and 2012, in accordance with Rule 3-10 of Regulation S-X. The consolidating financial information includes the accounts of CDW Corporation (the “Parent Guarantor”), which has no independent assets or operations, the accounts of CDW LLC (the “Subsidiary Issuer”), the combined accounts of the Guarantor Subsidiaries, the accounts of the Non-Guarantor Subsidiary, and the accounts of CDW Finance Corporation (the “Co-Issuer”) for the periods indicated. The information was prepared on the same basis as the Company’s consolidated financial statements.

Condensed Consolidating Balance Sheet
June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Assets
Current assets:
Cash and cash equivalents	$	—	$	142.0	$	11.2	$	26.2		$	—	$	(0.1	)	$	179.3
Accounts receivable, net	—		—		1,335.2		55.3			—		—			1,390.5
Merchandise inventory	—		—		376.2		2.3			—		—			378.5
Miscellaneous receivables	—		55.4		103.3		6.4			—		—			165.1
Deferred income taxes	—		8.5		3.7		(0.1		)	—		—			12.1
Prepaid expenses and other	—		24.0		83.6		0.6			—		—			108.2
Total current assets	—		229.9		1,913.2		90.7			—		(0.1		)	2,233.7
Property and equipment, net	—		69.4		61.1		2.2			—		—			132.7
Goodwill	—		749.4		1,428.5		29.5			—		—			2,207.4
Other intangible assets, net	—		343.9		1,052.5		7.3			—		—			1,403.7
Deferred financing costs, net	—		41.4		—		—			—		—			41.4
Other assets	5.2		1.5		0.1		0.6			—		(5.8		)	1.6
Investment from and advances to subsidiaries	203.8		2,892.0		—		—			—		(3,095.8		)	—
Total assets	$	209.0	$	4,327.5	$	4,455.4	$	130.3		$	—	$	(3,101.7	)	$	6,020.5
Liabilities and Shareholders’ Equity
Current liabilities:
Accounts payable—trade	$	—	$	20.6	$	725.2	$	25.3		$	—	$	(0.1	)	$	771.0
Accounts payable—inventory financing	—		—		282.5		—			—		—			282.5
Current maturities of long-term debt	—		13.5		—		—			—		—			13.5
Deferred revenue	—		—		96.5		0.4			—		—			96.9
Accrued expenses	—		136.4		138.9		6.0			—		—			281.3
Total current liabilities	—		170.5		1,243.1		31.7			—		(0.1		)	1,445.2
Long-term liabilities:
Debt	—		3,710.9		—		—			—		—			3,710.9
Deferred income taxes	—		189.8		412.1		1.6			—		(5.2		)	598.3
Accrued interest	—		6.4		—		—			—		—			6.4
Other liabilities	—		46.1		3.6		1.6			—		(0.6		)	50.7
Total long-term liabilities	—		3,953.2		415.7		3.2			—		(5.8		)	4,366.3
Total shareholders’ equity	209.0		203.8		2,796.6		95.4			—		(3,095.8		)	209.0
Total liabilities and shareholders’ equity	$	209.0	$	4,327.5	$	4,455.4	$	130.3		$	—	$	(3,101.7	)	$	6,020.5

Condensed Consolidating Balance Sheet
December 31, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Assets
Current assets:
Cash and cash equivalents	$	—	$	48.0	$	—	$	9.8		$	—	$	(19.9	)	$	37.9
Accounts receivable, net	—		—		1,217.7		67.3			—		—			1,285.0
Merchandise inventory	—		—		313.2		1.4			—		—			314.6
Miscellaneous receivables	—		61.7		82.0		4.8			—		—			148.5
Deferred income taxes	—		8.7		5.5		(0.1		)	—		—			14.1
Prepaid expenses and other	—		10.1		24.4		0.1			—		—			34.6
Total current assets	—		128.5		1,642.8		83.3			—		(19.9		)	1,834.7
Property and equipment, net	—		73.9		66.2		2.6			—		—			142.7
Goodwill	—		749.4		1,428.5		31.4			—		—			2,209.3
Other intangible assets, net	—		348.6		1,121.7		8.2			—		—			1,478.5
Deferred financing costs, net	—		53.2		—		—			—		—			53.2
Other assets	5.4		1.1		0.4		0.6			—		(5.9		)	1.6
Investment in and advances to subsidiaries	131.1		2,946.0		—		—			—		(3,077.1		)	—
Total assets	$	136.5	$	4,300.7	$	4,259.6	$	126.1		$	—	$	(3,102.9	)	$	5,720.0
Liabilities and Shareholders’ Equity
Current liabilities:
Accounts payable—trade	$	—	$	16.5	$	500.3	$	21.7		$	—	$	(19.9	)	$	518.6
Accounts payable—inventory financing	—		—		249.2		—			—		—			249.2
Current maturities of long-term debt	—		40.0		—		—			—		—			40.0
Deferred revenue	—		—		57.8		—			—		—			57.8
Accrued expenses	—		139.3		157.4		5.9			—		—			302.6
Total current liabilities	—		195.8		964.7		27.6			—		(19.9		)	1,168.2
Long-term liabilities:
Debt	—		3,731.0		—		—			—		—			3,731.0
Deferred income taxes	—		188.1		440.0		1.7			—		(5.5		)	624.3
Accrued interest	—		8.0		—		—			—		—			8.0
Other liabilities	—		46.7		4.0		1.7			—		(0.4		)	52.0
Total long-term liabilities	—		3,973.8		444.0		3.4			—		(5.9		)	4,415.3
Total shareholders’ equity	136.5		131.1		2,850.9		95.1			—		(3,077.1		)	136.5
Total liabilities and shareholders' equity	$	136.5	$	4,300.7	$	4,259.6	$	126.1		$	—	$	(3,102.9	)	$	5,720.0

Consolidating Statement of Operations
Three Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net sales	$	—	$	—		$	2,662.0		$	117.3		$	—	$	—		$	2,779.3
Cost of sales	—		—			2,225.4			102.3			—		—			2,327.7
Gross profit	—		—			436.6			15.0			—		—			451.6
Selling and administrative expenses	—		27.6			230.1			8.7			—		—			266.4
Advertising expense	—		—			30.6			1.0			—		—			31.6
(Loss) income from operations	—		(27.6		)	175.9			5.3			—		—			153.6
Interest (expense) income, net	—		(70.4		)	—			0.1			—		—			(70.3		)
Net loss on extinguishments of long-term debt	—		(10.3		)	—			—			—		—			(10.3		)
Management fee	—		1.6			—			(1.6		)	—		—			—
Other (expense) income, net	—		(0.2		)	0.3			0.1			—		—			0.2
(Loss) income before income taxes	—		(106.9		)	176.2			3.9			—		—			73.2
Income tax benefit (expense)	—		39.8			(65.6		)	(0.7		)	—		—			(26.5		)
(Loss) income before equity in earnings of subsidiaries	—		(67.1		)	110.6			3.2			—		—			46.7
Equity in earnings of subsidiaries	46.7		113.8			—			—			—		(160.5		)	—
Net income	$	46.7	$	46.7		$	110.6		$	3.2		$	—	$	(160.5	)	$	46.7

Consolidating Statement of Operations
Three Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net sales	$	—	$	—		$	2,471.9		$	112.8		$	—	$	—		$	2,584.7
Cost of sales	—		—			2,059.2			98.6			—		—			2,157.8
Gross profit	—		—			412.7			14.2			—		—			426.9
Selling and administrative expenses	—		27.0			224.1			8.4			—		—			259.5
Advertising expense	—		—			29.9			1.1			—		—			31.0
(Loss) income from operations	—		(27.0		)	158.7			4.7			—		—			136.4
Interest expense, net	—		(76.9		)	—			—			—		—			(76.9		)
Net loss on extinguishments of long-term debt	—		—			—			—			—		—			—
Management fee	—		0.8			—			(0.8		)	—		—			—
Other income, net	—		0.2			—			—			—		—			0.2
(Loss) income before income taxes	—		(102.9		)	158.7			3.9			—		—			59.7
Income tax benefit (expense)	—		41.0			(62.9		)	(1.0		)	—		—			(22.9		)
(Loss) income before equity in earnings of subsidiaries	—		(61.9		)	95.8			2.9			—		—			36.8
Equity in earnings of subsidiaries	36.8		98.7			—			—			—		(135.5		)	—
Net income	$	36.8	$	36.8		$	95.8		$	2.9		$	—	$	(135.5	)	$	36.8

Consolidating Statement of Operations
Six Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net sales	$	—	$	—		$	4,951.8		$	239.2		$	—	$	—		$	5,191.0
Cost of sales	—		—			4,127.5			209.9			—		—			4,337.4
Gross profit	—		—			824.3			29.3			—		—			853.6
Selling and administrative expenses	—		53.3			446.8			17.8			—		—			517.9
Advertising expense	—		—			60.2			1.8			—		—			62.0
(Loss) income from operations	—		(53.3		)	317.3			9.7			—		—			273.7
Interest (expense) income, net	—		(142.6		)	—			0.2			—		—			(142.4		)
Net loss on extinguishments of long-term debt	—		(14.2		)	—			—			—		—			(14.2		)
Management fee	—		2.5			—			(2.5		)	—		—			—
Other (expense) income, net	—		(0.2		)	0.6			0.2			—		—			0.6
(Loss) income before income taxes	—		(207.8		)	317.9			7.6			—		—			117.7
Income tax benefit (expense)	—		77.5			(118.6		)	(1.6		)	—		—			(42.7		)
(Loss) income before equity in earnings of subsidiaries	—		(130.3		)	199.3			6.0			—		—			75.0
Equity in earnings of subsidiaries	75.0		205.3			—			—			—		(280.3		)	—
Net income	$	75.0	$	75.0		$	199.3		$	6.0		$	—	$	(280.3	)	$	75.0

Consolidating Statement of Operations
Six Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net sales	$	—	$	—		$	4,684.9		$	219.0		$	—	$	—		$	4,903.9
Cost of sales	—		—			3,901.2			191.2			—		—			4,092.4
Gross profit	—		—			783.7			27.8			—		—			811.5
Selling and administrative expenses	—		52.8			441.3			17.0			—		—			511.1
Advertising expense	—		—			58.5			1.9			—		—			60.4
(Loss) income from operations	—		(52.8		)	283.9			8.9			—		—			240.0
Interest (expense) income, net	—		(156.1		)	0.3			—			—		—			(155.8		)
Net loss on extinguishments of long-term debt	—		(9.4		)	—			—			—		—			(9.4		)
Management fee	—		2.2			—			(2.2		)	—		—			—
Other (expense) income, net	—		(0.1		)	0.1			—			—		—			—
(Loss) income before income taxes	—		(216.2		)	284.3			6.7			—		—			74.8
Income tax benefit (expense)	—		89.8			(115.1		)	(1.8		)	—		—			(27.1		)
(Loss) income before equity in earnings of subsidiaries	—		(126.4		)	169.2			4.9			—		—			47.7
Equity in earnings of subsidiaries	47.7		174.1			—			—			—		(221.8		)	—
Net income	$	47.7	$	47.7		$	169.2		$	4.9		$	—	$	(221.8	)	$	47.7

Condensed Consolidating Statement of Comprehensive Income
Three Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Comprehensive income (loss)	$	43.4	$	43.4	$	110.6	$	(0.1	)	$	—	$	(153.9	)	$	43.4

Condensed Consolidating Statement of Comprehensive Income
Three Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary		Co-Issuer		Consolidating Adjustments			Consolidated
Comprehensive income	$	35.2	$	35.2	$	95.8	$	1.3	$	—	$	(132.3	)	$	35.2

Condensed Consolidating Statement of Comprehensive Income
Six Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary		Co-Issuer		Consolidating Adjustments			Consolidated
Comprehensive income	$	69.3	$	69.3	$	199.3	$	0.3	$	—	$	(268.9	)	$	69.3

Condensed Consolidating Statement of Comprehensive Income
Six Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer		Guarantor Subsidiaries		Non-Guarantor Subsidiary		Co-Issuer		Consolidating Adjustments			Consolidated
Comprehensive income	$	48.0	$	48.0	$	169.2	$	5.2	$	—	$	(222.4	)	$	48.0

Condensed Consolidating Statement of Cash Flows
Six Months Ended June 30, 2013
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net cash (used in) provided by operating activities	$	—	$	(109.5	)	$	279.1		$	17.7		$	—	$	19.8		$	207.1
Cash flows from investing activities:
Capital expenditures	—		(18.0		)	(2.0		)	—			—		—			(20.0		)
Net cash used in investing activities	—		(18.0		)	(2.0		)	—			—		—			(20.0		)
Cash flows from financing activities:
Proceeds from borrowings under revolving credit facility	—		63.0			—			—			—		—			63.0
Repayments of borrowings under revolving credit facility	—		(63.0		)	—			—			—		—			(63.0		)
Repayments of long-term debt	—		(43.4		)	—			—			—		—			(43.4		)
Proceeds from issuance of long-term debt	—		1,346.6			—			—			—		—			1,346.6
Payments to extinguish long-term debt	—		(1,352.6		)	—			—			—		—			(1,352.6		)
Net change in accounts payable-inventory financing	—		—			33.3			—			—		—			33.3
Payment of incentive compensation plan withholding taxes	—		(3.8		)	(19.5		)	—			—		—			(23.3		)
Advances from (to) affiliates	—		279.6			(279.7		)	0.1			—		—			—
Other financing activities	—		(4.9		)	—			—			—		—			(4.9		)
Net cash provided by (used in) financing activities	—		221.5			(265.9		)	0.1			—		—			(44.3		)
Effect of exchange rate changes on cash and cash equivalents	—		—			—			(1.4		)	—		—			(1.4		)
Net increase in cash and cash equivalents	—		94.0			11.2			16.4			—		19.8			141.4
Cash and cash equivalents—beginning of period	—		48.0			—			9.8			—		(19.9		)	37.9
Cash and cash equivalents—end of period	$	—	$	142.0		$	11.2		$	26.2		$	—	$	(0.1	)	$	179.3

Condensed Consolidating Statement of Cash Flows
Six Months Ended June 30, 2012
(in millions)	Parent Guarantor		Subsidiary Issuer			Guarantor Subsidiaries			Non-Guarantor Subsidiary			Co-Issuer		Consolidating Adjustments			Consolidated
Net cash (used in) provided by operating activities	$	—	$	(118.3	)	$	410.6		$	13.1		$	—	$	(0.7	)	$	304.7
Cash flows from investing activities:
Capital expenditures	—		(8.8		)	(6.5		)	(0.4		)	—		—			(15.7		)
Net cash used in investing activities	—		(8.8		)	(6.5		)	(0.4		)	—		—			(15.7		)
Cash flows from financing activities:
Proceeds from borrowings under revolving credit facility	—		256.0			—			—			—		—			256.0
Repayments of borrowings under revolving credit facility	—		(256.0		)	—			—			—		—			(256.0		)
Repayments of long-term debt	—		(201.0		)	—			—			—		—			(201.0		)
Proceeds from issuance of long-term debt	—		135.7			—			—			—		—			135.7
Payments to extinguish long-term debt	—		(136.9		)	—			—			—		—			(136.9		)
Net change in accounts payable-inventory financing	—		—			(25.5		)	—			—		—			(25.5		)
Advances from (to) affiliates	—		371.8			(372.3		)	0.5			—		—			—
Other financing activities	—		(2.4		)	—			—			—		—			(2.4		)
Net cash provided by (used in) financing activities	—		167.2			(397.8		)	0.5			—		—			(230.1		)
Effect of exchange rate changes on cash and cash equivalents	—		—			—			(0.1		)	—		—			(0.1		)
Net increase in cash and cash equivalents	—		40.1			6.3			13.1			—		(0.7		)	58.8
Cash and cash equivalents—beginning of period	—		102.1			15.8			8.1			—		(26.1		)	99.9
Cash and cash equivalents—end of period	$	—	$	142.2		$	22.1		$	21.2		$	—	$	(26.8	)	$	158.7

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Earnings per Share (Notes)

6 Months Ended

Jun. 30, 2013

Earnings Per Share [Abstract]

Earnings Per Share [Text Block]

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 number of common shares outstanding during the period. The dilutive effect of outstanding MPK Plan Units and Deferred Units is reflected in the denominator for diluted earnings per share using the treasury stock method. Class B Common Units are not dilutive as no incremental common shares are issued upon vesting or repurchase by the Company.

The following is a reconciliation of basic shares to diluted shares:

	Three Months Ended June 30,		Six Months Ended June 30,
(in millions)	2013	2012	2013	2012
Weighted-average shares - basic	145.3	145.1	145.2	145.0
Effect of dilutive securities	1.4	0.7	1.3	0.8
Weighted-average shares - diluted	146.7	145.8	146.5	145.8

There were no potential common shares excluded from diluted earnings per share for the three and six month periods ended June 30, 2013 and 2012.

On July 2, 2013, the Company completed an IPO of its common shares which will impact both basic and diluted earnings per share in future periods. See Note 13 for additional discussion of the Company's IPO.

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Inventory Financing Agreements (Tables)

6 Months Ended

Jun. 30, 2013

Inventory Financing Agreements [Abstract]

Inventory Financing Agreements

The following table presents the amounts included in accounts payable-inventory financing:

(in millions)	June 30, 2013		December 31, 2012
Revolving Loan inventory financing agreement	$	280.5	$	248.3
Other inventory financing agreements	2.0		0.9
Accounts payable-inventory financing	$	282.5	$	249.2

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Subsequent Events (Notes)

6 Months Ended

Jun. 30, 2013

Subsequent Events [Abstract]

Subsequent Events [Text Block]

Subsequent Events

On July 2, 2013, the Company completed an IPO of 23,250,000 shares of common stock. On July 31, 2013, the Company completed the sale of an additional 3,487,500 shares of common stock to the underwriters of the IPO pursuant to the underwriters' July 26, 2013 exercise in full of the overallotment option granted to them in connection with the IPO. Such shares were registered under the Securities Act of 1933, as amended, pursuant to the Company's Registration Statement on Form S-1, which was declared effective by the SEC on June 26, 2013. The common shares are listed on the NASDAQ Global Select Market under the symbol “CDW.” The Company's common shares were sold to the underwriters at a price of $17.00 per share in the IPO and upon the exercise of the overallotment option, which generated aggregate net proceeds of approximately $429.5 million to the Company after deducting underwriting discounts, before expenses and transaction costs.

Using a portion of the net proceeds from the IPO, the Company paid a $24.4 million termination fee to affiliates of the Sponsors in connection with the termination of the management services agreement with such entities that was effective upon completion of the IPO and redeemed $175.0 million aggregate principal amount of Senior Secured Notes. The redemption price of the Senior Secured Notes was 108.000% of the principal amount redeemed, plus $0.7 million of accrued and unpaid interest to the date of redemption. The Company used cash on hand to pay such accrued and unpaid interest. Following this redemption, $325.0 million aggregate principal amount of the Senior Secured Notes remain outstanding. In connection with this redemption, the Company expects to record a loss on extinguishment of long-term debt of $16.7 million in the consolidated statement of operations during the third quarter of 2013. This loss represents $14.0 million in redemption premium and $2.7 million for the write-off of a portion of the remaining deferred financing costs related to the Senior Secured Notes.

On August 1, 2013, the Company redeemed $324.0 million aggregate principal amount of Senior Subordinated Notes. The Company used a portion of the net proceeds from the IPO to redeem $146.0 million aggregate principal amount of Senior Subordinated Notes and incremental borrowings of $190.0 million under the Term Loan to redeem $178.0 million aggregate principal amount of Senior Subordinated Notes. The redemption price of the Senior Subordinated Notes was 106.268% of the principal amount redeemed, plus $12.0 million of accrued and unpaid interest to the date of redemption. The Company used cash on hand to pay such accrued and unpaid interest. Following this redemption, $247.5 million aggregate principal amount of the Senior Subordinated Notes remain outstanding. In connection with this redemption, the Company expects to record a loss on extinguishment of long-term debt of $24.7 million in the consolidated statement of operations during the third quarter of 2013. This loss represents $20.3 million in redemption premium and $4.4 million for the write-off of a portion of the remaining deferred financing costs related to the Senior Subordinated Notes.

The Company previously filed a claim as part of a class action settlement in a case alleging price fixing during the period of January 1, 1996 through December 31, 2006, by certain manufacturers of thin-film liquid crystal display panels. On July 13, 2013, the United Stated District Court for the Northern District of California approved distribution of the settlement proceeds, including a net payment to the Company of approximately $10.5 million after fees and expenses. The first of two settlement payments was received by the Company on July 29, 2013 in the amount of $8.5 million. The balance is expected to be received by year-end 2013.

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Document and Entity Information Document	6 Months Ended
	Jun. 30, 2013	Aug. 08, 2013
Document and Entity Information [Abstract]
Entity Registrant Name	CDW Corp
Entity Central Index Key	0001402057
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		171,957,228

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Description Of Business And Summary Of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2013

Description of Business and Summary of Significant Accounting Policies [Abstract]

Basis of Presentation, Policy

Basis of Presentation

The accompanying unaudited interim consolidated financial statements as of June 30, 2013 and for the three and six months ended June 30, 2013 and 2012 ("consolidated financial statements") have been prepared pursuant to the rules and regulations of the U.S. Securities and Exchange Commission ("SEC") for interim financial statements. Accordingly, certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") have been condensed or omitted pursuant to such rules and regulations. The consolidated financial statements should be read in conjunction with the audited consolidated financial statements included in the Company's Annual Report on Form 10-K for the year ended December 31, 2012 ("December 31, 2012 financial statements"). The significant accounting policies used in preparing these consolidated financial statements were applied on a basis consistent with those reflected in the December 31, 2012 financial statements, except as disclosed in Note 2. 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 shareholders' equity as of the dates and for the periods indicated. The unaudited consolidated statements of operations for such interim periods reported are not necessarily indicative of results for the full year.

CDW Corporation ("Parent") was previously owned directly by CDW Holdings LLC ("CDW Holdings"), a company controlled by investment funds affiliated with Madison Dearborn Partners, LLC ("Madison Dearborn") and Providence Equity Partners, L.L.C. ("Providence Equity," and together with Madison Dearborn, the "Sponsors"), certain other co-investors and certain members of CDW management. On July 2, 2013, Parent completed an initial public offering ("IPO") of its common stock. During June 2013, in connection with the IPO, CDW Holdings distributed all of its shares of Parent's common stock to its members in accordance with their respective membership interests. See Note 13 for additional discussion of Parent's IPO.

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 as described in Note 12 and does not hold any material assets or engage in any business activities or operations.

Throughout these notes, the terms the “Company” and “CDW” refer to Parent and its 100% owned subsidiaries.

Principles of Consolidation, Policy

Principles of Consolidation

The accompanying consolidated financial statements include the accounts of Parent and its 100% owned subsidiaries. All intercompany transactions and accounts are eliminated in consolidation.

Use of Estimates, Policy

Use of Estimates

The preparation of consolidated financial statements in accordance with GAAP requires management to make use of certain estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported periods. The Company bases its estimates on historical experience and on various other assumptions that management believes are reasonable under the circumstances, the results of which form the basis for making judgments about carrying values of assets and liabilities that are not readily apparent from other sources. Actual results could differ from those estimates.

The notes to the consolidated financial statements contained in the December 31, 2012 financial statements include an additional discussion of the significant accounting policies and estimates used in the preparation of the Company's consolidated financial statements. There have been no material changes to the Company's significant accounting policies and estimates during the six months ended June 30, 2013.

Reclassifications, Policy

Reclassifications

Certain reclassifications have been made to the prior period consolidated financial statements to conform to the current period presentation.

See Note 6 for a description of the reclassification and split of the Company's common shares that were completed during the second quarter of 2013.