Consolidated Statement of Shareholder's Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings/ (Accumulated Deficit)	Accumulated Other Comprehensive Income (Loss) (AOCI)	Non-controlling Interests
Balance, shares at Mar. 31, 2014		1,000
Balance at Mar. 31, 2014	$ 268	$ 0	$ 1,404	$ (1,073)	$ (91)	$ 28
Increase (Decrease) in Stockholder's Equity [Roll Forward]
Net income attributable to our common shareholder	148			148
Net income attributable to noncontrolling interests	0
Currency translation adjustment, net of tax included in AOCI	(304)				(302)	(2)
Change in fair value of effective portion of hedges, net of tax included in AOCI	(43)				(43)
Change in pension and other benefits, net of tax included in AOCI	(138)				(125)	(13)
Noncontrolling interest related to the sale of a business	(1)					(1)
Balance, shares at Mar. 31, 2015		1,000
Balance at Mar. 31, 2015	(70)	$ 0	1,404	(925)	(561)	12
Increase (Decrease) in Stockholder's Equity [Roll Forward]
Net income attributable to our common shareholder	(38)			(38)
Net income attributable to noncontrolling interests	0
Currency translation adjustment, net of tax included in AOCI	17				17
Change in fair value of effective portion of hedges, net of tax included in AOCI	52				52
Change in pension and other benefits, net of tax included in AOCI	(19)				(8)	(11)
Noncontrolling interest related to the sale of a business	(1)					(1)
Balance, shares at Mar. 31, 2016		1,000
Balance at Mar. 31, 2016	(59)	$ 0	1,404	(963)	(500)	0
Increase (Decrease) in Stockholder's Equity [Roll Forward]
Net income attributable to our common shareholder	45			45
Net income attributable to noncontrolling interests	1					1
Currency translation adjustment, net of tax included in AOCI	(59)				(60)	1
Change in fair value of effective portion of hedges, net of tax included in AOCI	(35)				(35)
Change in pension and other benefits, net of tax included in AOCI	52				50	2
Noncontrolling interest related to the sale of a business	(22)					(22)
Balance, shares at Mar. 31, 2017		1,000
Balance at Mar. 31, 2017	$ (77)	$ 0	$ 1,404	$ (918)	$ (545)	$ (18)