Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income (loss)	$ (51)	$ 233	$ 440
Other comprehensive income (loss), net of tax:
Currency translation adjustments	(77)	8	(63)
Hedging gains and losses	39	24	10
Defined benefit plans	9	344	23
Other comprehensive income (loss)	(29)	376	(30)
Total comprehensive income (loss)	(80)	609	410
Less: Comprehensive income attributable to noncontrolling interests	(27)	(9)	(7)
Less: Comprehensive loss attributable to redeemable noncontrolling interests	36	1	6
Comprehensive income (loss) attributable to the parent company	$ (71)	$ 601	$ 409