Debt 4 (Details) (Notional Pooling Arrangement [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Notional Pooling Arrangement [Member]
Borrowings outstanding under cash pooling arrangement
Total borrowings outstanding at beginning of year	$ 136	[1]	$ 139	[1]
Borrowings	3,702		1,143
Repayments	(3,734)		(1,139)
Foreign currency exchange effect	35		(7)
Total borrowings outstanding at end of year	$ 139	[1]	$ 136	[1]

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