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Supplemental Statement of Cash Flows Information 2 (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Supplemental Statement of Cash Flows Information (Textual) [Abstract]    
Interest payments, net $ 26 $ 26
Income taxes paid, net 199 125
Excess tax benefits from options exercised included in financing activities 3 5
Share-based incentive awards 46 57
Withholding taxes on share-based incentive awards 27 30
Discretionary stock contributions to CA, Inc. Savings Harvest Plan $ 28 $ 29