Consolidated Statement Of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income	$ 112	$ 96	$ 147	$ 334
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Currency translation adjustments	(46)	(19)	(16)	(65)
Hedging gains and losses	8	3	15	(11)
Defined benefit plans	5	21	365	34
Other comprehensive income (loss)	(33)	5	364	(42)
Total comprehensive income	79	101	511	292
Less: Comprehensive loss attributable to noncontrolling interests	9		4
Less: Comprehensive income attributable to redeemable noncontrolling interests	(3)		(6)
Comprehensive income attributable to the parent company	$ 85	$ 101	$ 509	$ 292