v2.4.1.9

Equity-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2014
Share-based Arrangements with Employees and Nonemployees [Abstract] |
Schedule Equity-Based Compensation Expense [Table Text Block] | The following table summarizes equity-based compensation expense, which is included in selling and administrative expenses, for the years ended December 31, 2014, 2013 and 2012:
(in millions) |  | Year Ended December 31,
|  | 2014 |  | 2013 (1) |  | 2012 (2)
Equity-based compensation expense |  | $ | 16.4 |  |  | $ | 46.6 |  |  | $ | 22.1 |
Income tax benefit |  | (5.1 | ) |  | (16.5 | ) |  | (2.3 | )
Total (net of tax) |  | $ | 11.3 |  |  | $ | 30.1 |  |  | $ | 19.8 |
(1) | Includes pre-tax expense of $36.7 million related to the accelerated vesting of certain equity awards granted prior to our IPO. All unvested awards granted pursuant to the MPK Coworker Incentive Plan II (the “MPK Plan”) vested in connection with the IPO as discussed further below in the section labeled "MPK II Units."
(2) | Includes pre-tax expense of $6.6 million in connection with the modification of Class B Common Unit awards granted pursuant to the CDW Holdings LLC 2007 Incentive Equity Plan to the Company’s former Chief Executive Officer, as discussed further below in the section labeled "Class B Common Units."
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The weighted-average assumptions used to value the stock options granted during the years ended December 31, 2014 and 2013 are presented below.
|  | Year Ended December 31,
|  | 2014 |  | 2013
Weighted-average grant date fair value |  | $ | 7.23 |  |  | $ | 4.75 |
Weighted-average volatility (1) |  | 30.00 | % |  | 35.00 | %
Weighted-average risk-free rate (2) |  | 1.77 | % |  | 1.58 | %
Dividend yield |  | 0.70 | % |  | 1.00 | %
Expected term (in years) (3) |  | 6.0 |  |  | 5.4 |
(1) | Based upon an assessment of the two-year, five-year and implied volatility for the Company’s selected peer group, adjusted for the Company’s leverage.
(2) | Based on a composite U.S. Treasury rate.
(3) | Calculated using the simplified method. The simplified method defines the expected term as the average of the option’s contractual term and the option’s weighted-average vesting period. The Company utilizes this method as it has limited historical stock option data that is sufficient to derive a reasonable estimate of the expected stock option term.
Schedule of Stock Options Roll Forward [Table Text Block] | The following table summarizes the Company's stock option activity for the year ended December 31, 2014:
Options |  | Number of Options |  | Weighted-Average Exercise Price |  | Weighted-Average Remaining Contractual Term (years) |  | Aggregate Intrinsic Value (millions)
Outstanding at January 1, 2014 |  | 1,280,255 |  |  | $17.00 |  |  |  |
Granted |  | 1,245,513 |  |  | 24.40 |  |  |  |  |
Forfeited/Expired |  | (31,209 | ) |  | 21.33 |  |  |  |  |
Exercised |  | (73,487 | ) |  | 17.00 |  |  |  |  |
Outstanding at December 31, 2014 |  | 2,421,072 |  |  | $20.75 |  | 8.3 |  | $34.9
Exercisable at December 31, 2014 |  | 576,963 |  |  | $17.00 |  | 7.2 |  | $10.5
Vested and expected to vest at December 31, 2014 |  | 2,378,364 |  |  | $20.74 |  | 8.3 |  | $34.3
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] | The following table summarizes the Company's RSU activity for the year ended December 31, 2014:
| Number of Units |  | Weighted-Average Grant-Date Fair Value
Nonvested at January 1, 2014 | 1,351,572 |  |  | $ | 17.04 |
Granted | 25,895 |  |  | 24.29 |
Vested/Settled | (5,984 | ) |  | 17.00 |
Forfeited | (126,781 | ) |  | 17.04 |
Nonvested at December 31, 2014 | 1,244,702 |  |  | $ | 17.19 |
Schedule of Share-based Payment Award, Equity Investments other than Options, Valuation Assumptions [Table Text Block] | The following table summarizes the assumptions and resulting fair value of the Class B Common Unit grants for the years ended December 31, 2013 and 2012:
| Years Ended December 31,
Assumptions | 2013 |  | 2012
Weighted-average grant date fair value | $ | 119.00 |  |  | $ | 125.65 |
Weighted-average volatility (1) | 65.50 | % |  | 65.26 | %
Weighted-average risk-free rate (2) | 0.18 | % |  | 0.19 | %
Dividend yield | 0.00 | % |  | 0.00 | %
(1) | Based upon an assessment of the two-year, five-year and implied volatility for the Company’s selected peer group, adjusted for the Company’s leverage.
(2) | Based on a composite U.S. Treasury rate.
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block] | The following table sets forth a summary of pre-IPO equity plan activity for the year ended December 31, 2013:
| Class B Common Units |  | MPK Plan Units
Outstanding at January 1, 2013 | 216,483 |  |  | 66,137 |
Granted | 400 |  |  | — |
Forfeited | (860 | ) |  | (2,228 | )
Converted/Settled (1) | (216,023 | ) |  | (63,909 | )
Outstanding at December 31, 2013 | — |  |  | — |
Vested at December 31, 2013 | — |  |  | — |
(1) | As discussed above, the Class B Common Units and MPK Plan Units were converted/settled into shares of the Company's common stock upon completion of the IPO. The converted Class B Common Units, to the extent unvested at the time of the IPO, relate to the grants of restricted stock disclosed above.

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- Definition Schedule of Share-based Payment Award, Equity Investments other than Options, Valuation Assumptions [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the change in stock options. + References No definition available. + Details
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