Divestitures (Details) (Discontinued Components [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Income from operations of discontinued components
Total revenue	$ 31	$ 33
Income from operations of discontinued components, net of tax expense of $4 million and $4 million, respectively	5	5
Tax expense on income from operations of discontinued components	4	4
Subscription and Maintenance [Member]
Income from operations of discontinued components
Total revenue	21	22
Software Fees and Other [Member]
Income from operations of discontinued components
Total revenue	$ 10	$ 11