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Summary of Significant Accounting Policies - Narrative (Details)
 12 Months Ended
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