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Summary of Significant Accounting Policies - Deferred Revenue (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Contract With Customer, Liability [Roll Forward] |  |
Deferred lease revenues – current | $ 149 | $ 168
Customer Loyalty |  |
Contract With Customer, Liability [Roll Forward] |  |
Beginning balance | 67 | 61
Revenue deferred | 61 | 58
Revenue recognized | (78) |
Revenue recognized |  | (52)
Ending balance | 50 | 67
Deferred lease revenues – current | 27 | 20
Contract with customer, liability, noncurrent | $ 23 | $ 47
Customer Loyalty | Minimum |  |
Disaggregation of Revenue [Line Items] |  |
Term | 12 months |
Customer Loyalty | Maximum |  |
Disaggregation of Revenue [Line Items] |  |
Term | 5 years |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Minimum |  |
Contract With Customer, Liability [Roll Forward] |  |
Revenue recognition period | 2 years |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Maximum |  |
Contract With Customer, Liability [Roll Forward] |  |
Revenue recognition period | 3 years |

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