Income Taxes (Details 4) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Income Tax Disclosure [Abstract]
Provisions not currently deductible for tax purposes	$ 315	$ 323
Tax losses/benefit carryforwards, net	493	338
Depreciation and amortization	46	50
Other assets	8	13
Total deferred income tax assets	862	724
Less: valuation allowance	(426)	(317)
Net deferred income tax assets	436	407
Depreciation and amortization	529	583
Inventory valuation reserves	87	91
Monetary exchange gains, net	46	58
Other liabilities	34	20
Total deferred income tax liabilities	696	752
Net deferred income tax liabilities	$ 260	$ 345