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Revenue - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Capitalized Contract Cost [Line Items]          
Passenger ticket revenues $ 4,538 $ 4,110 $ 8,537 $ 7,838  
Contract liability 3,500   3,500   $ 2,800
Customer deposit 139   139    
Contract asset 169   169   161
Commission, transportation and other          
Capitalized Contract Cost [Line Items]          
Capitalized contract costs 304   304   $ 252
Port Costs          
Capitalized Contract Cost [Line Items]          
Passenger ticket revenues $ 318 $ 266 $ 594 $ 509  
Minimum          
Capitalized Contract Cost [Line Items]          
Duration of cruises     3 days    
Maximum          
Capitalized Contract Cost [Line Items]          
Duration of cruises     14 days