(Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Net (Loss) attributable to Royal Caribbean Cruises Ltd. for basic and diluted loss per share	$ (1,347,255)	$ (1,639,292)	$ (2,478,977)	$ (3,083,771)
Weighted-average common shares outstanding (in shares)	254,577,000	209,385,000	248,823,000	209,241,000
Diluted weighted-average shares outstanding (in shares)	254,577,000	209,385,000	248,823,000	209,241,000
Basic (loss) per share (in dollars per share)	$ (5.29)	$ (7.83)	$ (9.96)	$ (14.74)
Diluted (loss) per share (in dollars per share)	$ (5.29)	$ (7.83)	$ (9.96)	$ (14.74)
Antidilutive securities (in shares)	445,000,000	421,000	449,000	662,000