Stockholders' Equity 2 (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	May. 14, 2014
Equity [Abstract]
Stock repurchase program, Authorized amount				$ 1,000
Shares of common stock repurchased		1.7
Value of common stock repurchased		$ 50
Stock repurchase program, Remaining authorized common stock repurchase amount		735
Accumulated other comprehensive loss		$ (386)	$ (418)
Subsequent Event
Subsequent Event [Line Items]
Value of common stock to be repurchased and delivered during subsequent period	$ 50