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Investments and Other Assets - Narrative (Details)
$ in Millions
3 Months Ended
Mar. 31, 2026
USD ($)
floating_drydock
Dec. 31, 2025
USD ($)
iCON Infrastructure Partners VI, L.P. | Not Primary Beneficiary    
Investments in and Advances to Affiliates [Line Items]    
Percentage of ownership interest 10.00%  
TUI Cruises GmbH Joint Venture    
Investments in and Advances to Affiliates [Line Items]    
Percentage of ownership interest 50.00%  
Investments in entity $ 1,100 $ 990
TUI Cruises GmbH Joint Venture | TUI Cruise Ships    
Investments in and Advances to Affiliates [Line Items]    
Restriction on reduction of current ownership interest (as a percent) 37.55%  
TUI Cruises GmbH Joint Venture | Not Primary Beneficiary    
Investments in and Advances to Affiliates [Line Items]    
Percentage of ownership interest 50.00%  
Grand Bahama | Not Primary Beneficiary    
Investments in and Advances to Affiliates [Line Items]    
Percentage of ownership interest 33.00%  
Floating Docks S. DE RL | Not Primary Beneficiary    
Investments in and Advances to Affiliates [Line Items]    
Percentage of ownership interest 33.00%  
Investments in entity $ 166  
Number of floating drydocks | floating_drydock 2