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Segment Information 3 (Details) (Fiscal 2014 Plan [Member], USD $)
In Millions, unless otherwise specified
9 Months Ended
Dec. 31, 2013
Fiscal 2014 Plan [Member]
 
Segment Reporting [Line Items]  
Rebalancing charges $ 131us-gaap_RestructuringCharges
/ us-gaap_RestructuringPlanAxis
= ca_FiscalYear2014RebalancingPlanMember