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Investments and Other Assets - Narrative (Details)
€ in Millions, $ in Millions
1 Months Ended 12 Months Ended
Apr. 30, 2016
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
floating_drydock
entity
Dec. 31, 2022
USD ($)
Dec. 31, 2024
EUR (€)
Dec. 31, 2023
EUR (€)
entity
Investments in and Advances to Affiliates, Activity [Line Items]            
Proceeds from sale of noncontrolling interest   $ 0 $ 209 $ 0    
Grand Bahama            
Investments in and Advances to Affiliates, Activity [Line Items]            
Additional ownership interest   9.00%     9.00%  
Port Of Miami            
Investments in and Advances to Affiliates, Activity [Line Items]            
Percentage of investment sold     80.00%     80.00%
Proceeds from sale of noncontrolling interest     $ 209      
Port Of Miami | Variable Interest Entity, Primary Beneficiary            
Investments in and Advances to Affiliates, Activity [Line Items]            
Ownership interest retained, percent     20.00%     20.00%
TUI Cruises            
Investments in and Advances to Affiliates, Activity [Line Items]            
Ownership interest retained, percent   50.00%     50.00%  
Investments in entity   $ 814 $ 657      
Underlying equity in net assets   749 566      
Advances to affiliate   $ 57 $ 79   € 55 € 71
TUI Cruises | TUI cruise ships            
Investments in and Advances to Affiliates, Activity [Line Items]            
Reduction of current ownership interest, minimum allowed (as a percent)   37.55%     37.55%  
TUI Cruises | Splendor of the Seas            
Investments in and Advances to Affiliates, Activity [Line Items]            
Interest rate on debt facility provided to related party (as a percent) 6.25%          
Debt instrument, term (in years) 10 years          
Debt, guaranteed percentage 50.00%          
TUI Cruises | Not Primary Beneficiary            
Investments in and Advances to Affiliates, Activity [Line Items]            
Ownership interest retained, percent   50.00%     50.00%  
Grand Bahama            
Investments in and Advances to Affiliates, Activity [Line Items]            
Percentage of investment sold   33.00%     33.00%  
Grand Bahama | Not Primary Beneficiary            
Investments in and Advances to Affiliates, Activity [Line Items]            
Ownership interest retained, percent   49.00%     49.00%  
Grand Bahama | Not Primary Beneficiary | Other Shareholder            
Investments in and Advances to Affiliates, Activity [Line Items]            
Ownership interest retained, percent     49.00%     49.00%
Grand Bahama | Not Primary Beneficiary | Minimum            
Investments in and Advances to Affiliates, Activity [Line Items]            
Ownership interest retained, percent   40.00%     40.00%  
Grand Bahama | Not Primary Beneficiary | Maximum            
Investments in and Advances to Affiliates, Activity [Line Items]            
Ownership interest retained, percent   49.00%     49.00%  
Floating Docks            
Investments in and Advances to Affiliates, Activity [Line Items]            
Percentage of investment sold   33.00%     33.00%  
Floating Docks | Not Primary Beneficiary            
Investments in and Advances to Affiliates, Activity [Line Items]            
Ownership interest retained, percent     50.00%     50.00%
Investments in entity   $ 80        
Number of floating drydocks | floating_drydock     2      
Percentage of certain installment payments payable     50.00%     50.00%
Investment total guaranteed   $ 37        
Italian Entities            
Investments in and Advances to Affiliates, Activity [Line Items]            
Number of entities | entity     2     2