Consolidated Statement Of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net income	$ 127	$ 73	$ 238	$ 153
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Currency translation adjustments	(56)	(31)	(46)	(1)
Hedging gains and losses	(6)	5	(14)	1
Defined benefit plans	6	5	13	10
Other comprehensive income (loss)	(56)	(21)	(47)	10
Total comprehensive income	71	52	191	163
Less: Comprehensive (income) loss attributable to noncontrolling interests	2	(6)		(13)
Less: Comprehensive loss attributable to redeemable noncontrolling interests	2			1
Comprehensive income attributable to the parent company	$ 75	$ 46	$ 191	$ 151