CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ (267)	$ 1,273	$ 1,907
Other comprehensive (loss) income:
Foreign currency translation adjustments	229	35	(391)
Derivative instrument adjustments and other, net of tax	(3)	(5)	21
Total other comprehensive income (loss), net of tax	226	30	(370)
Comprehensive (loss) income	$ (41)	$ 1,303	$ 1,537