Accumulated Other Comprehensive Income (Loss) - Components of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,502	$ 1,273	$ 1,537	$ 1,253
Other comprehensive loss before reclassifications	(15)	13	(19)	(10)
Reclassified from Accumulated other comprehensive loss to earnings	1	3	5	5
Period Change	(14)	16	(14)	(5)
Ending balance	1,502	1,413	1,502	1,413
Derivative Gain (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	1	(7)	(3)	0
Other comprehensive loss before reclassifications	(2)	(1)	(2)	(8)
Reclassified from Accumulated other comprehensive loss to earnings	1	3	5	3
Period Change	(1)	2	3	(5)
Ending balance	0	(5)	0	(5)
Foreign Currency Translation Gain (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(67)	(100)	(63)	(86)
Other comprehensive loss before reclassifications	(13)	14	(17)	(2)
Reclassified from Accumulated other comprehensive loss to earnings	0	0	0	2
Period Change	(13)	14	(17)	0
Ending balance	(80)	(86)	(80)	(86)
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(66)	(107)	(66)	(86)
Ending balance	$ (80)	$ (91)	$ (80)	$ (91)