Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ 1,335	$ 834	$ 792
Other comprehensive (loss) income before reclassifications	31	33	(23)
Amounts reclassified from AOCI	(40)	(9)	16
Tax effect	0	(7)	0
Other comprehensive loss (income), net of tax	(9)	17	(7)
Ending Balance	1,839	1,335	834
Unrealized gain (loss) on sales hedging
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	12	(9)	6
Other comprehensive (loss) income before reclassifications		38	(26)
Amounts reclassified from AOCI		(13)	8
Tax effect		(4)	3
Other comprehensive loss (income), net of tax		21	(15)
Ending Balance		12	(9)
Unrealized gain (loss) on sales hedging
Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive (loss) income before reclassifications	30
Amounts reclassified from AOCI	(42)
Tax effect	2
Other comprehensive loss (income), net of tax	(10)
Ending Balance	2
Unrealized gain (loss) on forward interest rate swaps
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	0	(9)	(15)
Other comprehensive (loss) income before reclassifications	0	8	1
Amounts reclassified from AOCI	2	4	8
Tax effect	(2)	(3)	(3)
Other comprehensive loss (income), net of tax	0	9	6
Ending Balance	0	0	(9)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(47)	(34)	(36)
Other comprehensive (loss) income before reclassifications	1	(13)	2
Amounts reclassified from AOCI	0	0	0
Tax effect	0	0	0
Other comprehensive loss (income), net of tax	1	(13)	2
Ending Balance	(46)	(47)	(34)
Total
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	(35)	(52)	(45)
Ending Balance	$ (44)	$ (35)	$ (52)