Condensed Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 893	$ 516	$ 1,233	$ 1,190
Other comprehensive income (loss), net of tax (Note 11)
Unrealized gain (loss) on hedges, net of income tax expense (benefit) of $5, $(4), $(45), $(15)	17	(12)	(134)	(45)
Foreign currency translation adjustment	82	(164)	(311)	(99)
Other comprehensive income (loss), net of tax	99	(176)	(445)	(144)
Comprehensive income	$ 992	$ 340	$ 788	$ 1,046