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Investments and Other Assets (Narrative) (Details)
€ in Millions, $ in Millions
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Apr. 30, 2016
Mar. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
entity
floating_drydock
Dec. 31, 2023
USD ($)
entity
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2023
EUR (€)
entity
Dec. 31, 2022
EUR (€)
Investments in and Advances to Affiliates [Line Items]                
Proceeds from sale of noncontrolling interest       $ 209.0 $ 0.0 $ 0.0    
Credit loss (recovery), net       (12.0) (10.0)      
Property, Plant and Equipment                
Investments in and Advances to Affiliates [Line Items]                
Credit loss (recovery), net       $ 43.0        
TUI Cruises GmbH joint venture                
Investments in and Advances to Affiliates [Line Items]                
Investment in a joint venture, percentage of interest     50.00% 50.00%     50.00%  
Equity and loans due from equity method investee     $ 657.0 $ 657.0 466.0      
Equity investment     566.0 566.0 361.0      
Loan investment     $ 79.0 $ 79.0 $ 93.0   € 71 € 87
TUI Cruises GmbH joint venture | TUI cruise ships                
Investments in and Advances to Affiliates [Line Items]                
Reduction of current ownership interest, minimum allowed (as a percent)     37.55% 37.55%     37.55%  
TUI Cruises GmbH joint venture | Splendor of the Seas                
Investments in and Advances to Affiliates [Line Items]                
Interest rate on debt facility provided to related party (as a percent) 6.25%              
Debt instrument, term (in years) 10 years              
Related party guarantor obligation percentage 50.00%              
TUI Cruises GmbH joint venture | Not Primary Beneficiary                
Investments in and Advances to Affiliates [Line Items]                
Investment in a joint venture, percentage of interest     50.00% 50.00%     50.00%  
Grand Bahama | Not Primary Beneficiary                
Investments in and Advances to Affiliates [Line Items]                
Investment in a joint venture, percentage of interest     40.00% 40.00%     40.00%  
Floating Docks | Not Primary Beneficiary                
Investments in and Advances to Affiliates [Line Items]                
Investment in a joint venture, percentage of interest     50.00% 50.00%     50.00%  
Number of floating drydocks | floating_drydock     2          
Percentage of certain installment payments payable     50.00% 50.00%     50.00%  
Investment total guaranteed     $ 46.0 $ 46.0        
Italian Entities                
Investments in and Advances to Affiliates [Line Items]                
Number of Entities | entity     2 2     2  
Port Of Miami                
Investments in and Advances to Affiliates [Line Items]                
Percentage of investment sold   80.00%            
Proceeds from sale of noncontrolling interest   $ 208.9            
Port Of Miami | Variable Interest Entity, Primary Beneficiary                
Investments in and Advances to Affiliates [Line Items]                
Investment in a joint venture, percentage of interest   20.00%            
Other Shareholder | Grand Bahama | Not Primary Beneficiary                
Investments in and Advances to Affiliates [Line Items]                
Investment in a joint venture, percentage of interest     40.00% 40.00%     40.00%