CONDENSED CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - 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]
Net income	$ 310	$ 721	$ 1,230	$ 1,770
Other comprehensive income, net of reclassification adjustments:
Foreign currency translation gains (losses)	(133)	(25)	(185)	(218)
Unrealized gains (losses) on investments, net	3	8	59	(30)
Tax benefit (expense) on unrealized gains (losses) on investments, net	0	(2)	(15)	8
Unrealized gains (losses) on hedging activities, net	35	(16)	5	92
Tax benefit (expense) on unrealized gains (losses) on hedging activities, net	(8)	4	(1)	(19)
Other comprehensive income (loss), net of tax	(103)	(31)	(137)	(167)
Comprehensive income (loss)	$ 207	$ 690	$ 1,093	$ 1,603