Fair Value Measurements - Schedule of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 1,616	$ 1,117
Total other comprehensive income, net of tax	15
Ending balance	3,389	3,389
Unrealized Net Gains on Derivative Instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		0
Other comprehensive income before reclassifications		2
Amounts reclassified from accumulated other comprehensive income		12
Total other comprehensive income, net of tax		14
Ending balance	14	14
Foreign Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		0
Other comprehensive income before reclassifications		1
Amounts reclassified from accumulated other comprehensive income		0
Total other comprehensive income, net of tax		1
Ending balance	1	1
AOCI Including Portion Attributable to Noncontrolling Interest
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		0
Other comprehensive income before reclassifications		3
Amounts reclassified from accumulated other comprehensive income		12
Total other comprehensive income, net of tax		15
Ending balance	$ 15	$ 15