Discontinued Operations Discontinued Operations (Schedule of Results from Discontinued Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]
Revenues	$ 3	$ 79	$ 40	$ 164
Loss from discontinued operations	(8)	(25)	(24)	(28)
Loss on sale	(6)	0	(6)	0
Loss from discontinued operations before income tax	(14)	(25)	(30)	(28)
Income tax benefit	0	6	2	5
Loss from discontinued operations, net of tax	$ (14)	$ (19)	$ (28)	$ (23)