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Commitments and Contingencies - Schedule of Future Capital Commitments (Details)
Sep. 30, 2025
berth
Long-term Purchase Commitment [Line Items]  
Approximate Berths 35,700
Royal Caribbean | Unnamed  
Long-term Purchase Commitment [Line Items]  
Approximate Berths 5,700
Royal Caribbean | Legend of the Seas  
Long-term Purchase Commitment [Line Items]  
Approximate Berths 5,600
Royal Caribbean | Unnamed  
Long-term Purchase Commitment [Line Items]  
Approximate Berths 5,600
Celebrity Cruises | Celebrity Xcel  
Long-term Purchase Commitment [Line Items]  
Approximate Berths 3,250
Celebrity Cruises | Celebrity Xcite  
Long-term Purchase Commitment [Line Items]  
Approximate Berths 3,250
Mein Schiff | Mein Schiff Flow  
Long-term Purchase Commitment [Line Items]  
Approximate Berths 4,100
Mein Schiff | Mein Schiff Unnamed Ship 1  
Long-term Purchase Commitment [Line Items]  
Approximate Berths 4,100
Mein Schiff | Mein Schiff Unnamed Ship 2  
Long-term Purchase Commitment [Line Items]  
Approximate Berths 4,100