(Loss) Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net (Loss) Income attributable to Royal Caribbean Cruises Ltd. for basic and diluted earnings per share	$ (1,639,292)	$ 472,830	$ (3,083,771)	$ 722,511
Weighted-average common shares outstanding (in shares)	209,385	209,531	209,241	209,427
Dilutive effect of stock-based awards and stock options (in shares)	0	521	0	535
Diluted weighted-average shares outstanding (in shares)	209,385	210,052	209,241	209,962
Basic (loss) earnings per share (in dollars per share)	$ (7.83)	$ 2.26	$ (14.74)	$ 3.45
Diluted (loss) earnings per share (in dollars per share)	$ (7.83)	$ 2.25	$ (14.74)	$ 3.44