Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments, tax	$ 1	$ 2	$ (6)	$ 19
Reclassification adjustment for foreign currency translation included in Other operating expense, net, net of tax	29	0	29	0
Unrealized gains (losses), tax	(2)	0	(13)	8
Reclassification adjustment for losses (gains) included in “Other income (expense), net,” tax	$ 0	$ 0	$ 0	$ 0