Property, Plant and Equipment (Details 4) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Property, Plant and Equipment [Line Items]
Assets under capital lease obligations	$ 93	$ 93
Accumulated amortization	(65)	(56)
Assets under capital lease obligations, net	28	37
Buildings [Member]
Property, Plant and Equipment [Line Items]
Assets under capital lease obligations	12	11
Machinery and Equipment [Member]
Property, Plant and Equipment [Line Items]
Assets under capital lease obligations	$ 81	$ 82