Stockholders' Equity 2 (Details) (USD $) Share data in Millions, unless otherwise specified	1 Months Ended	9 Months Ended	0 Months Ended
	May 31, 2014	Dec. 31, 2014	Jan. 02, 2015	Mar. 31, 2014
Equity [Abstract]
Stock repurchase program, Authorized amount	$ 1,000,000,000
Shares of common stock repurchased		4.3
Value of common stock repurchased		125,000,000
Remaining authorized common stock repurchase amount		875,000,000
Accumulated other comprehensive loss		(333,000,000)		(171,000,000)
Subsequent Event [Member]
Subsequent Event [Line Items]
Value of common stock to be delivered in March 2015			$ 75,000,000