Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 74	$ 86	$ 138	$ 135
Other comprehensive income (loss), before tax:
Foreign currency translation adjustment	26	3	(103)	1
Foreign currency gain reclassified into net income	0	0	(8)	0
Net change in cash flow hedges:
Unrealized losses	0	(7)	(5)	(8)
Amount of loss (gain) reclassified into net income	7	(1)	12	(1)
Net change in postretirement benefit plans:
Net loss	0	(7)	0	(7)
Amortization of net actuarial loss into net income	4	3	8	6
Other comprehensive income (loss), before tax	37	(9)	(96)	(9)
Income tax impact related to items of other comprehensive income (loss)	2	(1)	3	0
Other comprehensive income (loss), net of tax	35	(8)	(99)	(9)
Comprehensive income	$ 109	$ 78	$ 39	$ 126