Consolidated Statement Of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income	$ 73	$ 61	$ 226	$ 164
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Currency translation adjustments	(1)	(8)	(2)	(2)
Hedging gains and losses	(14)	(11)	(13)	(21)
Investment and other gains and losses		(5)		(2)
Defined benefit plans	19		29	13
Other comprehensive income (loss)	4	(24)	14	(12)
Total comprehensive income	77	37	240	152
Less: Comprehensive income attributable to noncontrolling interests	(5)	(4)	(18)	(10)
Less: Comprehensive income attributable to redeemable noncontrolling interests	(1)
Comprehensive income attributable to the parent company	$ 71	$ 33	$ 222	$ 142