Summary of Significant Accounting Policies - Deferred Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Contract With Customer, Liability [Roll Forward]
Deferred lease revenues – current	$ 185	$ 70
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Minimum
Contract With Customer, Liability [Roll Forward]
Revenue recognition period	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Maximum
Contract With Customer, Liability [Roll Forward]
Revenue recognition period	3 years
Customer Loyalty
Contract With Customer, Liability [Roll Forward]
Beginning balance	$ 34	59
Revenue deferred	49	26
Revenue recognized	(33)	(51)
Ending balance	50	34
Deferred lease revenues – current	33	17
Contract with customer, liability, noncurrent	$ 17	$ 17