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Derivative Instruments (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Mar. 28, 2014
counterparty
Mar. 29, 2013
Derivative [Line Items]    
Credit Derivative, Maximum Exposure, Undiscounted $ 4us-gaap_CreditDerivativeMaximumExposureUndiscounted  
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments 3us-gaap_IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1  
Number of Counterparties to Interest Rate Derivative Instruments 3csc_NumberofCounterpartiestoInterestRateDerivativeInstruments  
Derivative liabilities 4us-gaap_DerivativeLiabilities 9us-gaap_DerivativeLiabilities
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 0us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral [1] 2us-gaap_DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral [1]
Derivative Liability, Fair Value, Gross Liability 4us-gaap_DerivativeFairValueOfDerivativeLiability 11us-gaap_DerivativeFairValueOfDerivativeLiability
Derivative assets 2us-gaap_DerivativeAssets 3us-gaap_DerivativeAssets
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 0us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral [1] 2us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral [1]
Derivative Asset, Fair Value, Gross Asset 2us-gaap_DerivativeFairValueOfDerivativeAsset 5us-gaap_DerivativeFairValueOfDerivativeAsset
Estimated fair value of foreign currency derivative assets 2us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue 5us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsAssetAtFairValue
Estimated fair value of foreign currency derivative liabilities 4us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue 11us-gaap_ForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsLiabilityAtFairValue
Number of counterparties with concentration of credit risk 4csc_NumberOfCounterpartiesToForeignCurrencyDerivativeInstruments  
Maximum amount of loss, based on gross fair value, due to concentration of credit risk 1us-gaap_ConcentrationRiskCreditRiskFinancialInstrumentMaximumExposure  
Forward Contracts [Member]    
Derivative [Line Items]    
Notional amount of derivatives outstanding 816invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ForwardContractsMember		 993invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_ForwardContractsMember
Option Contracts [Member]    
Derivative [Line Items]    
Notional amount of derivatives outstanding 81invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_OptionMember		 744invest_DerivativeNotionalAmount
/ us-gaap_DerivativeByNatureAxis
= us-gaap_OptionMember
Senior unsecured and unsubordinated notes | 4.45% term notes, due September 2022    
Derivative [Line Items]    
Debt instrument, stated interest rate (in hundredths) 4.45%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= csc_TermNotes445Due2022Member
/ us-gaap_LongtermDebtTypeAxis
= csc_SeniorUnsecuredAndUnsubordinatedNotesMember		 4.45%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= csc_TermNotes445Due2022Member
/ us-gaap_LongtermDebtTypeAxis
= csc_SeniorUnsecuredAndUnsubordinatedNotesMember
Interest Rate Derivative Liabilities, at Fair Value 275us-gaap_InterestRateDerivativeLiabilitiesAtFairValue
/ us-gaap_DebtInstrumentAxis
= csc_TermNotes445Due2022Member
/ us-gaap_LongtermDebtTypeAxis
= csc_SeniorUnsecuredAndUnsubordinatedNotesMember		  
Other Assets [Member]    
Derivative [Line Items]    
Interest rate swaps $ 3us-gaap_InterestRateDerivativeAssetsAtFairValue
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember		  
[1] These amounts represent the fair value of derivative instruments subject to enforceable master netting arrangements that the Company has elected to not offset. The Company's derivative contracts do not require it to hold or post financial collateral.