CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 2,197	$ 1,503	$ 1,848
Other comprehensive income (loss):
Foreign currency translation adjustments, net of tax	35	5	(9)
Unrealized gains (losses) on forward contracts designated as hedges, net of tax	(36)	(15)	38
Unrealized gains (losses) on investments, net of tax	(2)	(8)	5
Total other comprehensive income (loss)	(3)	(18)	34
Comprehensive income	$ 2,194	$ 1,485	$ 1,882