Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net Income	$ 154	$ 156	$ 249	$ 284
Other Comprehensive Income, net of Tax:
Foreign currency translation adjustments, net of tax effect of ($29), $16, ($37) and $24	42	(24)	62	24
Defined benefit pension plan adjustments, net of tax effect of $0, $1, $0, and ($1)	(1)	2	0	(1)
Other Comprehensive Income, net of Tax	41	(22)	62	23
Comprehensive Income	$ 195	$ 134	$ 311	$ 307