Other Income (Expense), Net (Summary of Other Income (Expense), Net) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2012
Other Nonoperating Income (Expense) [Abstract]
Interest income	$ 23		$ 22		$ 19
Equity in earnings (loss), net (1)	(3)	[1]	3	[1]	9	[1]
Other, net	12		9		(8)
Total	$ 32		$ 34		$ 20

[1] Primarily recorded within our Distribution Solutions segment.