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Redeemable Noncontrolling Interest (Narrative) (Details) - USD ($)
12 Months Ended
Jul. 09, 2020
Dec. 31, 2020
Oct. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Jul. 31, 2018
Redeemable Noncontrolling Interest [Line Items]            
Interest acquired 33.30%          
Common stock, shares issued (in shares) 5,200,000 265,198,371   236,547,842    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01 $ 0.01 $ 0.01    
Redeemable noncontrolling interest $ 0 $ 0   $ 569,981,000 $ 542,020,000  
Royal Caribbean International | Silversea Cruises Group            
Redeemable Noncontrolling Interest [Line Items]            
Ownership percentage by noncontrolling owners         33.30%  
Silversea Cruises            
Redeemable Noncontrolling Interest [Line Items]            
Interest acquired 33.30% 33.30%        
Common stock, shares issued (in shares) 5,200,000          
Silversea Cruises            
Redeemable Noncontrolling Interest [Line Items]            
Percentage of business acquired         66.70% 66.70%