CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - 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]
Net income	$ 580	$ 328	$ 1,084	$ 774
Other comprehensive income (loss):
Foreign currency translation adjustment, net of tax	4	(2)	(11)	1
Unrealized gains (losses) on forward contracts designated as hedges, net of tax	(10)	(8)	(9)	(6)
Unrealized gains (losses) on investments, net of tax	0	4	5	(2)
Total other comprehensive loss	(6)	(6)	(15)	(7)
Comprehensive income	$ 574	$ 322	$ 1,069	$ 767