Condensed Consolidated Statements of Comprehensive (Loss) Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Statement of Comprehensive Income [Abstract]
Foreign currency translation (loss) gain, tax	$ 4	$ 0	$ (7)	$ (6)
Unrealized (loss) gain on financial assets/liabilities designated as hedging instruments, tax effect	0	(1)	0	0
Defined benefit plans adjustment, tax	$ 0	$ 0	$ 2	$ 0