Investment in and Advances to Non-Consolidated Affiliates and Related Party Transactions (Assets, Liabilities and Equity of Equity Method Affiliates) (Details) - USD ($) $ in Millions	Mar. 31, 2017	Mar. 31, 2016
Investment In and Advances To Non-Consolidated Affiliates and Related Party Transactions [Abstract]
Current assets	$ 143	$ 148
Non-current assets	355	394
Total assets	498	542
Current liabilities	53	55
Non-current liabilities	283	337
Total liabilities	336	392
Total equity	162	150
Total liabilities and equity	$ 498	$ 542