v3.26.1
Fair Value Measurements and Derivative Instruments - Narrative (Details)
€ in Millions, $ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2026
USD ($)
Jun. 30, 2026
EUR (€)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Jun. 30, 2025
USD ($)
Derivatives, Fair Value [Line Items]          
Derivative instrument, credit risk exposure $ 71        
Maximum length of time hedged in derivative contract 3 years 3 years      
Percentage of debt bearing fixed interest 91.00%   93.00%    
Aggregate cost of ships on order, not including TUI cruises on order $ 16,500        
Amount deposited for cost of ships on order $ 1,300        
Percentage of aggregate cost exposed to fluctuations in the euro exchange rate 52.60%   64.10%    
TUI Cruises | Foreign currency debt          
Derivatives, Fair Value [Line Items]          
Net investments $ 655 € 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       $ 1,100
Foreign currency forward contracts          
Derivatives, Fair Value [Line Items]          
Notional amount 4,900   2,000    
Fuel swaps          
Derivatives, Fair Value [Line Items]          
Estimated unrealized gain (loss) associated with cash flow hedges $ 41   $ (66)