Discontinued Operations (Schedule of Results from Discontinued Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012
Discontinued Operations and Disposal Groups [Abstract]
Revenues	$ 78	$ 88	$ 304	$ 282
Loss from discontinued operations	(85)	(13)	(98)	(5)
Loss on sale, before tax	(5)	0	(5)	0
Loss from discontinued operations before income tax	(90)	(13)	(103)	(5)
Income tax (expense) benefit	(2)	5	3	0
Loss from discontinued operations, net of tax	$ (92)	$ (8)	$ (100)	$ (5)