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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 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Earnings Per Share [Abstract]        
Net Income attributable to Royal Caribbean Cruises Ltd. for basic earnings per share $ 1,210 $ 854 $ 1,940 $ 1,214
Add convertible notes interest and inducement expense 1 19 16 38
Net Income attributable to Royal Caribbean Cruises Ltd. for diluted earnings per share $ 1,211 $ 873 $ 1,956 $ 1,252
Weighted-average common shares outstanding (in shares) 272 257 270 257
Dilutive effect of stock-based awards (in shares) 1 1 1 1
Dilutive effect of convertible notes (in shares) 2 23 4 23
Diluted weighted-average shares outstanding (in shares) 275 281 275 281
Basic earnings per share (in dollars per share) $ 4.45 $ 3.32 $ 7.17 $ 4.72
Diluted earnings per share (in dollars per share) $ 4.41 $ 3.11 $ 7.10 $ 4.46