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Earnings Per Share - Schedule of Basic and Diluted Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Earnings Per Share [Abstract]        
Net Income attributable to Royal Caribbean Cruises Ltd. for basic earnings per share $ 1,575 $ 1,111 $ 3,514 $ 2,325
Add convertible notes interest and inducement expense 0 0 16 169
Net Income attributable to Royal Caribbean Cruises Ltd. for diluted earnings per share $ 1,575 $ 1,111 $ 3,530 $ 2,494
Weighted-average common shares outstanding (in shares) 272 263 271 259
Dilutive effect of stock-based awards (in shares) 1 1 1 1
Dilutive effect of convertible notes (in shares) 1 0 3 20
Diluted weighted-average shares outstanding (in shares) 274 264 275 280
Basic earnings per share (in dollars per share) $ 5.79 $ 4.22 $ 12.97 $ 8.98
Diluted earnings per share (in dollars per share) $ 5.74 $ 4.21 $ 12.83 $ 8.91