Condensed Consolidated Statement of Shareholder's Equity (Unaudited) (Parenthetical) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Sep. 30, 2014
Tax provision on currency translation adjustment	$ 0
Tax benefit on change in fair value of cash flow hedges	(5)
Tax provision on change in pension and other benefits	4
Accumulated Other Comprehensive Income (Loss) (AOCI)
Tax provision on currency translation adjustment	0
Tax benefit on change in fair value of cash flow hedges	(5)
Tax provision on change in pension and other benefits	4
Non-controlling interests [Member]
Tax provision on currency translation adjustment	$ 0