Supplemental Statement of Cash Flows Information 1 (Details) - Notional Pooling Arrangement - USD ($) $ in Millions		6 Months Ended
		Sep. 30, 2017	Sep. 30, 2016
Notional pooling arrangement
Borrowings		$ 1,173	$ 467
Repayments		(1,204)	(456)
Foreign exchange effect		31	(11)
Accrued Expenses and Other Current Liabilities
Notional pooling arrangement
Total borrowings outstanding at beginning of period	[1]	137	139
Total borrowings outstanding at end of period	[1]	$ 137	$ 139

[1] Included in “Accrued expenses and other current liabilities” in the Company’s Condensed Consolidated Balance Sheets.