Discontinued Operations (Schedule of Results from Discontinued Operations) (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
Discontinued Operations and Disposal Groups [Abstract]
Revenues	$ 2	$ 47	$ 42	$ 211
Loss from discontinued operations	(2)	(95)	(26)	(122)
Loss on sale	0	(5)	(6)	(5)
Loss from discontinued operations before income tax	(2)	(100)	(32)	(127)
Income tax benefit	0	1	2	5
Loss from discontinued operations, net of tax	$ (2)	$ (99)	$ (30)	$ (122)