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Intangible Assets (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2017
Indefinite-lived Intangible Assets [Line Items]    
Finite-lived intangible assets, gross   $ 11.6
Finite-lived intangible assets, accumulated amortization   $ 3.7
Pullmantur | Trademarks and trade names    
Indefinite-lived Intangible Assets [Line Items]    
Impairment charge $ (174.3)  
Operating Licenses in The Galapagos Islands    
Indefinite-lived Intangible Assets [Line Items]    
Weighted average useful life of operating licenses   26 years 7 months 6 days