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Fair Value Measurements and Derivative Instruments - Narrative (Details)
€ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2024
EUR (€)
Dec. 31, 2023
USD ($)
Dec. 31, 2023
EUR (€)
Dec. 31, 2022
USD ($)
Fair value of derivative instruments          
Derivative instrument, credit risk exposure $ 21   $ 125    
Maximum length of time hedged in derivative contract (in years) 3 years 3 years      
Percentage of debt bearing fixed interest 92.30%   83.20%    
Aggregate cost of ships on order, not including partner brands on order $ 7,800        
Amount deposited for cost of ships on order $ 815        
Percentage of aggregate cost exposed to fluctuations in the euro exchange rate 43.40%   43.50%    
Exchange gains (losses) recorded in other income (expense) $ 65   $ (43)   $ 93
TUI Cruises | Foreign currency debt          
Fair value of derivative instruments          
Carrying Value 921 € 889 716 € 648  
Foreign currency forward contracts          
Fair value of derivative instruments          
Notional amount 2,700   2,900    
Interest rate swaps          
Fair value of derivative instruments          
Notional amount 1,200   1,600    
Foreign currency forward contracts | Not Designated as Hedging Instrument          
Fair value of derivative instruments          
Notional amount 1,100   1,300    
Change in fair value of foreign currency forward contracts recognized in earnings (77)   19   $ (102)
Fuel swaps          
Fair value of derivative instruments          
Estimated unrealized net gains (losses) associated with cash flow hedges pertaining to fuel swap agreements expected to be reclassified to earnings from other accumulated comprehensive income (loss) $ 9   $ 21