Condensed Consolidated Statements 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	$ 516	$ 441	$ 1,190	$ 1,252
Other comprehensive loss, net of tax (Note 10)
Unrealized (loss) gain on hedges, net of income tax (benefit) expense of $(4), $2, $(15) and $1	(12)	1	(45)	19
Foreign currency translation adjustment, net of income tax benefit of $0, $0, $0 and $1	(164)	(35)	(99)	(221)
Other comprehensive loss, net of tax	(176)	(34)	(144)	(202)
Comprehensive income	$ 340	$ 407	$ 1,046	$ 1,050