Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Summary of Long-term debt (Parentheticals) (Details)

v3.6.0.2
Long-Term Debt - Summary of Long-term debt (Parentheticals) (Details)
€ in Millions, $ in Millions
12 Months Ended
Dec. 31, 2016
USD ($)
Dec. 31, 2016
EUR (€)
Dec. 31, 2015
USD ($)
4.750% senior unsecured notes      
Debt Instrument [Line Items]      
Debt, principal amount | $ $ 700.0    
Interest rate 4.75%    
4.625% senior unsecured notes      
Debt Instrument [Line Items]      
Debt, principal amount | $ $ 600.0    
Interest rate 4.625%    
Norwegian Epic Term Loan      
Debt Instrument [Line Items]      
Debt, principal amount   € 662.9  
Senior Secured Revolving Credit Facility      
Debt Instrument [Line Items]      
Debt, principal amount | $ $ 625.0    
Secured Revolving Credit Facility One      
Debt Instrument [Line Items]      
Debt, principal amount | $ 750.0    
Senior secured term loan facility      
Debt Instrument [Line Items]      
Debt, principal amount | $ 350.0    
Term Loan Facilities      
Debt Instrument [Line Items]      
Debt, principal amount | $ 1,506.6    
Pride of Hawai'i Loan      
Debt Instrument [Line Items]      
Debt, principal amount   308.1  
Norwegian Jewel Term Loan      
Debt Instrument [Line Items]      
Debt, principal amount | $ 334.1    
Pride Of America Hermes Loan      
Debt Instrument [Line Items]      
Debt, principal amount   258.0  
Breakaway One Loan      
Debt Instrument [Line Items]      
Debt, principal amount   529.8  
Breakaway Two Loan      
Debt Instrument [Line Items]      
Debt, principal amount   529.8  
Breakaway Three Loan      
Debt Instrument [Line Items]      
Debt, principal amount   590.5  
Breakaway Four Loan      
Debt Instrument [Line Items]      
Debt, principal amount   729.9  
Norwegian Jewel Term Loan One      
Debt Instrument [Line Items]      
Debt, principal amount   126.0  
Norwegian Jade Term Loan      
Debt Instrument [Line Items]      
Debt, principal amount   126.0  
Seahawk 1 term loan      
Debt Instrument [Line Items]      
Debt, principal amount   666.0  
Seahawk 2 term loan      
Debt Instrument [Line Items]      
Debt, principal amount   € 666.0  
5.25% senior unsecured notes      
Debt Instrument [Line Items]      
Debt, principal amount | $ $ 680.0    
Interest rate 5.25%    
Marina newbuild loan      
Debt Instrument [Line Items]      
Net unamortized premium | $ $ 0.2   $ 0.3
Riviera newbuild loan      
Debt Instrument [Line Items]      
Net unamortized premium | $ $ 0.3   $ 0.4