Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income		$ 661	$ 754	$ 646
Other comprehensive income (loss), net of tax
Unrealized (loss) gain on cash flow hedges, net of income tax (benefit) expense of $(2), $11 and $0		(1)	17	0
Defined benefit plans, net of income tax expense (benefit) of $9, $(3) and $(1)		21	(7)	(2)
Foreign currency translation adjustment, net of income tax expense (benefit) of $33, $17 and $(1)		253	(144)	(669)
Reclassification adjustment	[1]	197	0	0
Other comprehensive income (loss), net of tax		470	(134)	(671)
Comprehensive income (loss)		$ 1,131	$ 620	$ (25)

[1] The reclassification adjustment in 2017 is related to the sale of the European Operations.