Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies (Detail Textuals)

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Commitments and Contingencies (Detail Textuals)
$ in Millions, € in Billions
 12 Months Ended
Dec. 31, 2017
USD ($)
CruiseShip
Berth
Gross_Ton
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2017
EUR (€)
CruiseShip
Berth
Gross_Ton
Commitments and Contingencies Disclosure [Line Items]        
Total expense under non-cancelable operating lease commitments | $ $ 17.0 $ 15.0 $ 12.6  
Number of cruises ships 25     25
Capacity of ship, berths | Berth 50,400     50,400
Ships launching period through 2025        
Commitments and Contingencies Disclosure [Line Items]        
Number of additional ships 7      
Ships launching period through 2025 | Project Leonardo        
Commitments and Contingencies Disclosure [Line Items]        
Number of cruises ships 4     4
Capacity of ship, tons | Gross_Ton 140,000     140,000
Capacity of ship, berths | Berth 3,300     3,300
Number of additional ships 4      
Ships launching period in 2026 and 2027        
Commitments and Contingencies Disclosure [Line Items]        
Number of additional ships 2      
Ships launching period in 2026 and 2027 | Project Leonardo        
Commitments and Contingencies Disclosure [Line Items]        
Number of additional ships 2      
Ship Order Delivery In Winter 2020 [Member]        
Commitments and Contingencies Disclosure [Line Items]        
Capacity of ship, tons | Gross_Ton 55,000     55,000
Capacity of ship, berths | Berth 750     750
Ship Construction Contracts        
Commitments and Contingencies Disclosure [Line Items]        
Number of cruises ships 7     7
Scheduled delivery date of ships under construction spring of 2018 and fall of 2019      
Aggregate contract price of new ships $ 6,600.0     € 5.5
Export credit facility financing as percentage of contract price 80.00%     80.00%
Ship Construction Contracts | Breakaway Plus Class Ships        
Commitments and Contingencies Disclosure [Line Items]        
Number of cruises ships 2     2
Capacity of ship, tons per ship | Gross_Ton 168,000     168,000
Capacity of ship, berths per ship | Berth 4,000     4,000