Accounting Policies 1 (Details) (Notional Pooling Arrangement [Member], USD $) In Millions, unless otherwise specified	9 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Notional Pooling Arrangement [Member]
Activity under cash pooling arrangement
Total borrowing position outstanding at March 31, 2012	$ 139	[1]
Borrowings	791		240
Repayments	(787)		(112)
Foreign currency exchange effect	(3)
Total borrowing position outstanding at December 31, 2012	$ 140	[1]

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