CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (826)	$ (105)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(219)	35
Cash flow hedges	(2)	4
Defined benefit plans	4	1
Other comprehensive income (loss), net of tax	(217)	40
Comprehensive income (loss)	(1,043)	(65)
Less: Comprehensive income (loss) attributable to noncontrolling interests	(7)	18
Comprehensive income (loss) attributable to common shareholders	$ (1,036)	$ (83)