Supplemental Statement of Cash Flows Information 1 (Details) - Notional Pooling Arrangement - USD ($) $ in Millions		6 Months Ended
		Sep. 30, 2018	Sep. 30, 2017
Notional pooling arrangement
Borrowings		$ 1,076	$ 1,173
Repayments		(1,053)	(1,204)
Foreign exchange effect		(24)	31
Accrued Expenses and Other Current Liabilities
Notional pooling arrangement
Total borrowings outstanding at beginning of period	[1]	137	137
Total borrowings outstanding at end of period	[1]	$ 136	$ 137

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