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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, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Earnings Per Share [Abstract]        
Net Income attributable to Royal Caribbean Cruises Ltd. for basic earnings per share $ 1,111 $ 1,009 $ 2,325 $ 1,420
Add convertible notes interest and inducement expense 0 20 169 68
Net Income attributable to Royal Caribbean Cruises Ltd. for diluted earnings per share $ 1,111 $ 1,029 $ 2,494 $ 1,488
Weighted-average common shares outstanding (in shares) 263 256 259 256
Dilutive effect of stock-based awards (in shares) 1 1 1 1
Dilutive effect of convertible notes (in shares) 0 25 20 27
Diluted weighted-average shares outstanding (in shares) 264 282 280 284
Basic earnings per share (in dollars per share) $ 4.22 $ 3.94 $ 8.98 $ 5.55
Diluted earnings per share (in dollars per share) $ 4.21 $ 3.65 $ 8.91 $ 5.24