Divestitures 1 (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Income from discontinued operations        
Income from discontinued operations, net of tax $ 4 $ 7 $ 30 $ 21
Discontinued Components [Member]        
Income from discontinued operations        
Total revenue 9 35 55 103
Income from operations of discontinued components, net of tax expense 4 7 11 21
Gain on disposal of discontinued component, net of tax     19 0
Income from discontinued operations, net of tax     30 21
Tax expense on income from operations of discontinued components 2 6 8 15
Discontinued Components [Member] | Subscription and Maintenance [Member]        
Income from discontinued operations        
Total revenue 7 22 38 67
Discontinued Components [Member] | Software Fees and Other [Member]        
Income from discontinued operations        
Total revenue $ 2 $ 13 $ 17 $ 36