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Income Taxes Income Tax Expense by Component (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Current Income Tax Expense (Benefit) [Abstract] | |||
| Federal | $ 206.8us-gaap_CurrentFederalTaxExpenseBenefit | $ 96.7us-gaap_CurrentFederalTaxExpenseBenefit | $ 110.3us-gaap_CurrentFederalTaxExpenseBenefit |
| State | 19.3us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 10.1us-gaap_CurrentStateAndLocalTaxExpenseBenefit | 8.0us-gaap_CurrentStateAndLocalTaxExpenseBenefit |
| Foreign | 5.8us-gaap_CurrentForeignTaxExpenseBenefit | 4.6us-gaap_CurrentForeignTaxExpenseBenefit | 5.1us-gaap_CurrentForeignTaxExpenseBenefit |
| Total current | 231.9us-gaap_CurrentIncomeTaxExpenseBenefit | 111.4us-gaap_CurrentIncomeTaxExpenseBenefit | 123.4us-gaap_CurrentIncomeTaxExpenseBenefit |
| Deferred Income Tax Expense (Benefit) [Abstract] | |||
| Domestic | (89.0)cdw_DeferredDomesticIncomeTaxExpenseBenefit | (48.6)cdw_DeferredDomesticIncomeTaxExpenseBenefit | (56.2)cdw_DeferredDomesticIncomeTaxExpenseBenefit |
| Foreign | (0.1)us-gaap_DeferredForeignIncomeTaxExpenseBenefit | (0.1)us-gaap_DeferredForeignIncomeTaxExpenseBenefit | (0.1)us-gaap_DeferredForeignIncomeTaxExpenseBenefit |
| Total deferred | (89.1)us-gaap_DeferredIncomeTaxExpenseBenefit | (48.7)us-gaap_DeferredIncomeTaxExpenseBenefit | (56.3)us-gaap_DeferredIncomeTaxExpenseBenefit |
| Income tax expense | $ 142.8us-gaap_IncomeTaxExpenseBenefit | $ 62.7us-gaap_IncomeTaxExpenseBenefit | $ 67.1us-gaap_IncomeTaxExpenseBenefit |
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- Definition
The component of income tax expense for the period representing the increase (decrease) in the entity's domestic deferred tax assets and liabilities pertaining to continuing operations. No definition available.
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- Definition
Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred foreign income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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| X | ||||||||||
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- Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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