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Revenue - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Capitalized Contract Cost [Line Items]      
Passenger ticket revenues $ 4,452 $ 3,999  
Contract liability 3,500   $ 3,100
Contract asset 202   187
Commissions, transportation and other      
Capitalized Contract Cost [Line Items]      
Capitalized contract costs 292   $ 245
Port Costs      
Capitalized Contract Cost [Line Items]      
Passenger ticket revenues $ 321 $ 275  
Minimum      
Capitalized Contract Cost [Line Items]      
Duration of cruises 3 days    
Maximum      
Capitalized Contract Cost [Line Items]      
Duration of cruises 14 days