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Summary of Significant Accounting Policies - Narrative (Details) | 12 Months Ended
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Dec. 31, 2024 USD ($) reportingUnit | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Subsidiary, Sale of Stock [Line Items] |  |  |
Cumulative translation loss | $ 32,000,000 | $ 5,000,000 |
Net realized and unrealized gains (losses) on foreign currency transactions and balances | $ 29,000,000 | (48,000,000) | $ 29,000,000
Number of reporting units | reportingUnit | 1 |  |
Goodwill impairment | $ 0 | 0 |
Intangible asset impairment | 0 | 0 |
Impairment of long-lived assets |  |  | $ 91,000,000
Impairment, Long-Lived Asset, Held-for-Use, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  | General and administrative, Restructuring charges
Restructuring charges | $ 0 | 0 | $ 89,000,000
Number of days, long-term stay, minimum | 28 days |  |
Advance notice period required for cancellation | 30 days |  |
Advertising expense | $ 1,100,000,000 | $ 953,000,000 | $ 786,000,000
Award contractual term | 10 years |  |
Minimum |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |
Intangible assets, estimated useful life | 1 year |  |
Maximum |  |  |
Subsidiary, Sale of Stock [Line Items] |  |  |
Intangible assets, estimated useful life | 10 years |  |

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