Investment in and Advances to Non-Consolidated Affiliates and Related Party Transactions (Assets, Liabilities and Equity of Equity Method Affiliates) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Investment In and Advances To Non-Consolidated Affiliates and Related Party Transactions [Abstract]
Current assets	$ 145	$ 183
Non-current assets	357	484
Total assets	502	667
Current liabilities	51	132
Non-current liabilities	232	268
Total liabilities	283	400
Total equity	219	267
Total liabilities and equity	$ 502	$ 667