Condensed Consolidated Statements Of Comprehensive Income - 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	$ 173	$ 403	$ 340	$ 674
Other comprehensive (loss) income, net of tax (Note 11)
Unrealized loss on hedges, net of income tax benefit of $11, $6, $50, $11	(34)	(18)	(151)	(33)
Foreign currency translation adjustment	33	8	(393)	65
Other comprehensive (loss) income, net of tax	(1)	(10)	(544)	32
Comprehensive income (loss)	$ 172	$ 393	$ (204)	$ 706