Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 46	$ (38)	$ 148
Other comprehensive (loss) income:
Currency translation adjustment	(59)	17	(304)
Net change in fair value of effective portion of hedges, net	(57)	60	(44)
Net change in pension and other benefits, net	74	(33)	(209)
Other comprehensive (loss) income before income tax effect	(42)	44	(557)
Income tax benefit related to items of other comprehensive income (loss)	0	(6)	(72)
Other comprehensive (loss) income, net of tax	(42)	50	(485)
Comprehensive (loss) income	4	12	(337)
Less: Comprehensive income (loss) attributable to noncontrolling interest, net of tax	4	(11)	(15)
Comprehensive income attributable to our common shareholder	$ 0	$ 23	$ (322)