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Short-term Debt (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Mar. 28, 2014
Mar. 29, 2013
Commercial Paper    
Short-term Debt [Line Items]    
Commercial paper outstanding 0us-gaap_ShortTermBorrowings
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_CommercialPaperMember		  
Commercial Paper | Parent Company    
Short-term Debt [Line Items]    
Commercial paper outstanding   0us-gaap_ShortTermBorrowings
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_CommercialPaperMember
Line of Credit Foreign Bank | Guarantor Subsidiaries    
Short-term Debt [Line Items]    
Commercial paper outstanding 31us-gaap_ShortTermBorrowings
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
/ us-gaap_ShortTermDebtTypeAxis
= csc_LineOfCreditForeignBankMember		 $ 0us-gaap_ShortTermBorrowings
/ dei_LegalEntityAxis
= us-gaap_GuarantorSubsidiariesMember
/ us-gaap_ShortTermDebtTypeAxis
= csc_LineOfCreditForeignBankMember
Minimum | Commercial Paper    
Short-term Debt [Line Items]    
Short-term Debt, Term 1 month  
Maximum | Commercial Paper    
Short-term Debt [Line Items]    
Short-term Debt, Term 3 months