v2.4.1.9

Long-Term Debt Deferred Financing Costs (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013
Deferred Financing Costs [Roll Forward] |  |
Deferred financing costs, net | $ 30.1 us-gaap_DeferredFinanceCostsNoncurrentNet | $ 53.2 us-gaap_DeferredFinanceCostsNoncurrentNet
Increase in Deferred Finance Costs | 21.9 cdw_IncreaseInDeferredFinanceCosts | 6.1 cdw_IncreaseInDeferredFinanceCosts
Amortization of Financing Costs | 6.4 us-gaap_AmortizationOfFinancingCosts | 9.1 us-gaap_AmortizationOfFinancingCosts
Write off of Deferred Debt Issuance Cost | (12.6)us-gaap_WriteOffOfDeferredDebtIssuanceCost | (20.1)us-gaap_WriteOffOfDeferredDebtIssuanceCost
Deferred financing costs, net | $ 33.0 us-gaap_DeferredFinanceCostsNoncurrentNet | $ 30.1 us-gaap_DeferredFinanceCostsNoncurrentNet
Weighted Average Remaining Life, Deferred Finance Costs | 6 years 7 months 9 days | 4 years 11 months 7 days

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- Definition Weighted Average Remaining Life, Deferred Finance Costs + References No definition available. + Details
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- Definition Amount of noncash expense included in interest expense to issue debt and obtain financing associated with the related debt instruments. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 8 -Article 9 + Details
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- Definition Net amount of long-term deferred finance costs capitalized at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28555-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 17 -Article 5 + Details
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- Definition Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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