v3.26.3
Fair Value Measurements and Derivative Instruments - Narrative (Details)
€ in Millions, $ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2026
EUR (€)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Sep. 30, 2025
USD ($)
Derivatives, Fair Value [Line Items]          
Derivative instrument, credit risk exposure $ 225        
Maximum length of time hedged in derivative contract 3 years 3 years      
Percentage of debt bearing fixed interest 97.00%   93.00%    
Aggregate cost of ships on order, not including TUI cruises on order $ 19,400        
Amount deposited for cost of ships on order $ 1,500        
Percentage of aggregate cost exposed to fluctuations in the euro exchange rate 49.90%   64.10%    
TUI Cruises | Foreign currency debt          
Derivatives, Fair Value [Line Items]          
Net investments $ 651 € 573 $ 740 € 631  
Interest rate swaps          
Derivatives, Fair Value [Line Items]          
Notional amount 700   900    
Foreign currency forward contracts | Not Designated          
Derivatives, Fair Value [Line Items]          
Notional amount 1,400       $ 1,200
Foreign currency forward contracts          
Derivatives, Fair Value [Line Items]          
Notional amount 6,300   2,000    
Fuel swaps          
Derivatives, Fair Value [Line Items]          
Estimated unrealized gain (loss) associated with cash flow hedges $ 159   $ (66)