(Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net (Loss) attributable to Royal Caribbean Cruises Ltd. for basic and diluted loss per share	$ (1,424,554)	$ (1,346,756)	$ (3,903,531)	$ (4,430,527)
Weighted-average common shares outstanding (in shares)	254,713,000	214,163,000	250,808,000	210,894,000
Diluted weighted-average shares outstanding (in shares)	254,713,000	214,163,000	250,808,000	210,894,000
Basic (loss) per share (in dollars per share)	$ (5.59)	$ (6.29)	$ (15.56)	$ (21.01)
Diluted (loss) per share (in dollars per share)	$ (5.59)	$ (6.29)	$ (15.56)	$ (21.01)
Antidilutive securities (in shares)	339,835,000	192,981	433,705	265,606