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Stockholders' Equity (Details) (USD $)
12 Months Ended
Mar. 28, 2014
Mar. 29, 2013
Mar. 30, 2012
Dec. 31, 2010
Stock Repurchase Program [Abstract]        
Aggregate consideration $ 505,000,000us-gaap_StockRepurchasedAndRetiredDuringPeriodValue $ 305,000,000us-gaap_StockRepurchasedAndRetiredDuringPeriodValue    
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at March 30, 2012 108,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax 188,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax 306,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax  
Current-period other comprehensive loss income, net of taxes and non-controlling interests 186,000,000us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (81,000,000)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (128,000,000)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent  
Balance at March 29, 2013 279,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax 108,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax 188,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax  
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax (15,000,000)csc_ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetofTax 1,000,000csc_ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetofTax 10,000,000csc_ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetofTax  
Common Class A [Member] | December 2010 Share Repurchase Program [Member]        
Stock Repurchase Program [Abstract]        
Share repurchase program       1,000,000,000us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ csc_StockRepurchaseCategoryAxis
= csc_December2010ShareRepurchaseProgramMember
Repurchased shares (in shares) 9,773,469us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ csc_StockRepurchaseCategoryAxis
= csc_December2010ShareRepurchaseProgramMember
6,707,652us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ csc_StockRepurchaseCategoryAxis
= csc_December2010ShareRepurchaseProgramMember
   
Aggregate consideration 505,000,000us-gaap_StockRepurchasedAndRetiredDuringPeriodValue
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ csc_StockRepurchaseCategoryAxis
= csc_December2010ShareRepurchaseProgramMember
     
Weighted average price (in dollars per share) $ 51.65us-gaap_TreasuryStockAcquiredAverageCostPerShare
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ csc_StockRepurchaseCategoryAxis
= csc_December2010ShareRepurchaseProgramMember
     
Common Class A [Member] | December 2010 Share Repurchase Program [Member] | Accrued Liabilities [Member]        
Stock Repurchase Program [Abstract]        
Stock Repurchased During Period, Value 6,000,000us-gaap_StockRepurchasedDuringPeriodValue
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccruedLiabilitiesMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ csc_StockRepurchaseCategoryAxis
= csc_December2010ShareRepurchaseProgramMember
22,000,000us-gaap_StockRepurchasedDuringPeriodValue
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccruedLiabilitiesMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ csc_StockRepurchaseCategoryAxis
= csc_December2010ShareRepurchaseProgramMember
0us-gaap_StockRepurchasedDuringPeriodValue
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccruedLiabilitiesMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ csc_StockRepurchaseCategoryAxis
= csc_December2010ShareRepurchaseProgramMember
 
Common Class A [Member] | Shares Repurchased From Employees Related To Stock Option Plans [Member]        
Treasury Stock Transactions [Abstract]        
Accepted common stock in lieu of cash in connection with exercise of stock options (in shares) 168,739csc_AcceptedCommonStockInLieuOfCashInConnectionWithExerciseOfStockOptionsInShares
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ csc_StockRepurchaseCategoryAxis
= csc_SharesRepurchasedFromEmployeesRelatedToStockOptionPlansMember
91,921csc_AcceptedCommonStockInLieuOfCashInConnectionWithExerciseOfStockOptionsInShares
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ csc_StockRepurchaseCategoryAxis
= csc_SharesRepurchasedFromEmployeesRelatedToStockOptionPlansMember
   
Accepted common stock in lieu of cash in connection with the tax withholdings associated with the vesting and release of common stock (in shares) 160,753csc_AcceptedCommonStockInLieuOfCashInConnectionWithTaxWithholdingsInShares
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ csc_StockRepurchaseCategoryAxis
= csc_SharesRepurchasedFromEmployeesRelatedToStockOptionPlansMember
209,056csc_AcceptedCommonStockInLieuOfCashInConnectionWithTaxWithholdingsInShares
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
/ csc_StockRepurchaseCategoryAxis
= csc_SharesRepurchasedFromEmployeesRelatedToStockOptionPlansMember
   
Accumulated Translation Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at March 30, 2012 75,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
167,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
279,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
 
Current-period other comprehensive loss income, net of taxes and non-controlling interests (81,000,000)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
(92,000,000)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
(122,000,000)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
 
Balance at March 29, 2013 (6,000,000)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
75,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
167,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
 
Accumulated Defined Benefit Plans Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at March 30, 2012 33,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
21,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
27,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
 
Current-period other comprehensive loss income, net of taxes and non-controlling interests 267,000,000us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
11,000,000us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
(6,000,000)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
 
Balance at March 29, 2013 285,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
33,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
21,000,000us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
 
Foreign Currency Translation Adjustment [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 0csc_ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetofTax
/ us-gaap_StatementEquityComponentsAxis
= csc_ForeignCurrencyTranslationAdjustmentMember
0csc_ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetofTax
/ us-gaap_StatementEquityComponentsAxis
= csc_ForeignCurrencyTranslationAdjustmentMember
10,000,000csc_ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetofTax
/ us-gaap_StatementEquityComponentsAxis
= csc_ForeignCurrencyTranslationAdjustmentMember
 
Other Pension Plans, Postretirement or Supplemental Plans, Defined Benefit [Member]        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax (15,000,000)csc_ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetofTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember
1,000,000csc_ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetofTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember
0csc_ReclassificationfromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetofTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefitMember
 
Open Market Purchases [Member] | Common Stock [Member]        
Stock Repurchase Program [Abstract]        
Stock Repurchased During Period, Value   $ 305,000,000us-gaap_StockRepurchasedDuringPeriodValue
/ us-gaap_PlanNameAxis
= csc_OpenMarketPurchasesMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember
   
Weighted average price (in dollars per share)   $ 45.47us-gaap_TreasuryStockAcquiredAverageCostPerShare
/ us-gaap_PlanNameAxis
= csc_OpenMarketPurchasesMember
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonStockMember