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Property and Equipment (Narrative) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
ship
Dec. 31, 2019
USD ($)
Property and Equipment      
Capitalized interest cost $ 58.8 $ 59.1 $ 56.5
Impairment losses   635.5  
Three Pullmantur Ships | Disposal Group, Held-for-sale, Not Discontinued Operations      
Property and Equipment      
Impairment losses   $ 171.3  
Number of ships impaired, held-for-sale | ship   3  
Construction in Progress      
Property and Equipment      
Long-lived asset impairment $ 55.2 $ 91.5  
Azamara | Disposal Group, Held-for-sale, Not Discontinued Operations      
Property and Equipment      
Impairment losses   $ 166.8  
Number of ships impaired, held-for-sale | ship   3