XML 50 R56.htm IDEA: XBRL DOCUMENT v2.4.1.9
Long-Term Debt Term Loan (Details) (USD $)
 12 Months Ended 1 Months Ended 9 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jul. 31, 2013
Apr. 30, 2013
Sep. 30, 2013
Apr. 29, 2013
Mar. 31, 2015
Debt Instrument [Line Items]                
Proceeds from issuance of long-term debt $ 1,175,000,000us-gaap_ProceedsFromIssuanceOfLongTermDebt $ 1,535,200,000us-gaap_ProceedsFromIssuanceOfLongTermDebt $ 135,700,000us-gaap_ProceedsFromIssuanceOfLongTermDebt          
Deferred financing costs, net 33,000,000us-gaap_DeferredFinanceCostsNoncurrentNet 30,100,000us-gaap_DeferredFinanceCostsNoncurrentNet 53,200,000us-gaap_DeferredFinanceCostsNoncurrentNet          
Debt, long-term and short-term 3,192,400,000us-gaap_DebtInstrumentCarryingAmount              
Gains (Losses) on Extinguishment of Debt 90,700,000us-gaap_GainsLossesOnExtinguishmentOfDebt 64,000,000us-gaap_GainsLossesOnExtinguishmentOfDebt 17,200,000us-gaap_GainsLossesOnExtinguishmentOfDebt          
Write off of Deferred Debt Issuance Cost 12,600,000us-gaap_WriteOffOfDeferredDebtIssuanceCost 20,100,000us-gaap_WriteOffOfDeferredDebtIssuanceCost            
Revolving Credit Facility [Member]                
Debt Instrument [Line Items]                
Line of Credit Facility, Fee on Unused Portion, Basis Points 25cdw_LineOfCreditFacilityFeeOnUnusedPortionBasisPoints
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember		              
Deferred financing costs, net 6,400,000us-gaap_DeferredFinanceCostsNoncurrentNet
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember		              
Debt, long-term and short-term 0us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember		 0us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember		            
Long-term Debt, Weighted Average Interest Rate 0.00%us-gaap_LongtermDebtWeightedAverageInterestRate
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember		 [1]              
Gains (Losses) on Extinguishment of Debt 400,000us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember		              
Term Loan [Member]                
Debt Instrument [Line Items]                
Proceeds from issuance of long-term debt         1,350,000,000us-gaap_ProceedsFromIssuanceOfLongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		      
Discount, percent of par       99.25%cdw_DiscountPercentOfPar
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		     99.75%cdw_DiscountPercentOfPar
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		  
Debt Instrument, Unamortized Discount (3,700,000)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		 (4,400,000)us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		   1,400,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		     3,400,000us-gaap_DebtInstrumentUnamortizedDiscount
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		  
Deferred Finance Costs, Net       6,100,000us-gaap_DeferredFinanceCostsNet
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		        
Debt, long-term and short-term 1,513,500,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		 1,528,900,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		            
Long-term Debt, Weighted Average Interest Rate 3.25%us-gaap_LongtermDebtWeightedAverageInterestRate
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		 [1]              
Gains (Losses) on Extinguishment of Debt   10,300,000us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		            
Debt Instrument, Face Amount       190,000,000us-gaap_ProceedsFromIssuanceOfDebt
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		        
Net leverage ratio 3.1cdw_NetLeverageRatio
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		              
Quarterly amortization payment of original principal, Percent 0.25%cdw_QuarterlyAmortizationPaymentOfOriginalPrincipalPercent
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		              
Term Loan [Member] | LIBOR [Member]                
Debt Instrument [Line Items]                
Long-term Debt, Weighted Average Interest Rate 3.25%us-gaap_LongtermDebtWeightedAverageInterestRate
/ cdw_InterestRateBasisAxis
= cdw_LiborMember
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember		              
Prior Term Loan Facility [Member]                
Debt Instrument [Line Items]                
Debt, long-term and short-term             1,299,500,000us-gaap_DebtInstrumentCarryingAmount
/ us-gaap_LongtermDebtTypeAxis
= cdw_PriorTermLoanFacilityMember		  
Term Loan, Repayments           40,000,000us-gaap_RepaymentsOfDebt
/ us-gaap_LongtermDebtTypeAxis
= cdw_PriorTermLoanFacilityMember		    
Minimum [Member] | Revolving Credit Facility [Member] | ABR [Member]                
Debt Instrument [Line Items]                
Variable Interest Rate Margin 0.50%cdw_VariableInterestRateMargin
/ cdw_InterestRateBasisAxis
= cdw_AbrMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		              
Minimum [Member] | Revolving Credit Facility [Member] | LIBOR [Member]                
Debt Instrument [Line Items]                
Variable Interest Rate Margin 1.50%cdw_VariableInterestRateMargin
/ cdw_InterestRateBasisAxis
= cdw_LiborMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		              
Minimum [Member] | Term Loan [Member] | ABR [Member]                
Debt Instrument [Line Items]                
Variable Interest Rate Margin 1.25%cdw_VariableInterestRateMargin
/ cdw_InterestRateBasisAxis
= cdw_AbrMember
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		              
Minimum [Member] | Term Loan [Member] | LIBOR [Member]                
Debt Instrument [Line Items]                
Variable Interest Rate Margin 2.25%cdw_VariableInterestRateMargin
/ cdw_InterestRateBasisAxis
= cdw_LiborMember
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		              
Reference Interest Rate Floor 1.00%cdw_ReferenceInterestRateFloor
/ cdw_InterestRateBasisAxis
= cdw_LiborMember
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		              
Maximum [Member] | Revolving Credit Facility [Member] | ABR [Member]                
Debt Instrument [Line Items]                
Variable Interest Rate Margin 1.00%cdw_VariableInterestRateMargin
/ cdw_InterestRateBasisAxis
= cdw_AbrMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		              
Maximum [Member] | Revolving Credit Facility [Member] | LIBOR [Member]                
Debt Instrument [Line Items]                
Variable Interest Rate Margin 2.00%cdw_VariableInterestRateMargin
/ cdw_InterestRateBasisAxis
= cdw_LiborMember
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_RevolvingCreditFacilityMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		              
Maximum [Member] | Term Loan [Member] | ABR [Member]                
Debt Instrument [Line Items]                
Variable Interest Rate Margin 1.50%cdw_VariableInterestRateMargin
/ cdw_InterestRateBasisAxis
= cdw_AbrMember
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		              
Maximum [Member] | Term Loan [Member] | LIBOR [Member]                
Debt Instrument [Line Items]                
Variable Interest Rate Margin 2.50%cdw_VariableInterestRateMargin
/ cdw_InterestRateBasisAxis
= cdw_LiborMember
/ us-gaap_LongtermDebtTypeAxis
= cdw_TermLoanMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember		              
Cap agreement effective January 14, 2013-2015 [Member]                
Debt Instrument [Line Items]                
Derivative, Notional Amount 1,150,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= cdw_CapAgreementEffectiveJanuary1420132015Member		              
Derivative, Cap Interest Rate 2.40%us-gaap_DerivativeCapInterestRate
/ us-gaap_DerivativeByNatureAxis
= cdw_CapAgreementEffectiveJanuary1420132015Member		              
Derivative Asset, Noncurrent 0us-gaap_DerivativeAssetsNoncurrent
/ us-gaap_DerivativeByNatureAxis
= cdw_CapAgreementEffectiveJanuary1420132015Member		              
Cap agreement effective January 14, 2015-2017 [Member]                
Debt Instrument [Line Items]                
Derivative, Notional Amount 1,000,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= cdw_CapagreementeffectiveJanuary1420152017Member		              
Derivative Asset, Noncurrent 1,700,000us-gaap_DerivativeAssetsNoncurrent
/ us-gaap_DerivativeByNatureAxis
= cdw_CapagreementeffectiveJanuary1420152017Member		              
Subsequent Event [Member] | Cap agreement effective January 14, 2015-2017 [Member]                
Debt Instrument [Line Items]                
Derivative, Notional Amount               $ 400,000,000invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= cdw_CapagreementeffectiveJanuary1420152017Member
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Derivative, Cap Interest Rate               2.00%us-gaap_DerivativeCapInterestRate
/ us-gaap_DerivativeByNatureAxis
= cdw_CapagreementeffectiveJanuary1420152017Member
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
[1] Interest rate at December 31, 2014.