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Commitments and Contingencies - Narrative (Details)
$ in Billions
1 Months Ended 6 Months Ended
Aug. 31, 2019
lawsuit
Jun. 30, 2022
USD ($)
Dec. 31, 2021
Commitments and Contingencies      
Number of claims filed | lawsuit 2    
Number of months considered to determine requirement of prepayment of debts   24 months  
Line of Credit | Minimum      
Commitments and Contingencies      
Debt instrument covenant, minimum percentage of ownership by a person   50.00%  
Debt Securities | Minimum      
Commitments and Contingencies      
Debt instrument covenant, minimum percentage of ownership by a person   50.00%  
Cruise ships on order      
Commitments and Contingencies      
Aggregate cost of ships on order, not including TUI cruises on order   $ 9.4  
Deposit for the purchase of ships expected to enter service   $ 0.6  
Percentage of aggregate cost exposed to fluctuations in the euro exchange rate   61.70% 59.00%