CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 100	$ (1,460)	$ (220)
Other comprehensive income (loss)—net of tax:
Foreign currency translation adjustments	(83)	(12)	16
Defined benefit plans	227	(11)	(45)
Cash flow hedges	(2)	4	0
Other comprehensive income (loss), net of tax	142	(19)	(29)
Comprehensive income (loss)	242	(1,479)	(249)
Less: Comprehensive income (loss) attributable to noncontrolling interests	58	75	104
Comprehensive income (loss) attributable to common shareholders	$ 184	$ (1,554)	$ (353)