Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Earnings Per Share [Abstract]
Net Income attributable to Royal Caribbean Cruises Ltd. for basic earnings per share	$ 854	$ 459	$ 1,214	$ 411
Add convertible notes interest	19	21	38	4
Net Income attributable to Royal Caribbean Cruises Ltd. for diluted earnings per share	$ 873	$ 480	$ 1,252	$ 415
Weighted-average common shares outstanding (in shares)	257,000,000	256,000,000	257,000,000	256,000,000
Dilutive effect of stock-based awards (in shares)	1,000,000	0	1,000,000	0
Dilutive effect of convertible notes (in shares)	23,000,000	26,000,000	23,000,000	3,000,000
Diluted weighted-average shares outstanding (in shares)	281,000,000	282,000,000	281,000,000	259,000,000
Basic earnings per share (in dollars per share)	$ 3.32	$ 1.79	$ 4.72	$ 1.61
Diluted earnings per share (in dollars per share)	$ 3.11	$ 1.70	$ 4.46	$ 1.60
Antidilutive securities (in shares)	0	0	0	25,459,641