Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 512	$ 361	$ 1,017	$ 728
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments		38	(11)	(97)
Change in unrealized gains and losses on cash flow hedges	(13)	38	(17)	(53)
Other comprehensive income (loss)	1	76	(28)	(150)
Comprehensive income	$ 513	$ 437	$ 989	$ 578