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Revenue - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Capitalized Contract Cost [Line Items]          
Passenger ticket revenues $ 4,886 $ 4,160 $ 12,724 $ 10,569  
Contract liability 2,600   2,600   $ 2,600
Customer deposit 253   253    
Contract asset 162   162   167
Commission, transportation and other          
Capitalized Contract Cost [Line Items]          
Capitalized contract costs 263   263   $ 257
Port Costs          
Capitalized Contract Cost [Line Items]          
Passenger ticket revenues $ 313 $ 252 $ 822 $ 682  
Minimum          
Capitalized Contract Cost [Line Items]          
Duration of cruises     3 days    
Maximum          
Capitalized Contract Cost [Line Items]          
Duration of cruises     14 days