Changes in Accumulated Other Comprehensive Income (Loss) - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Reclassifications out of accumulated other comprehensive loss
Recognized gain				$ 4,946
Other operating expenses	$ 308,609		$ 1,623,038	2,499,848	$ 4,581,246
Pullmantur Holdings
Reclassifications out of accumulated other comprehensive loss
Other expense	69,000			69,000
Deferred currency translation loss	92,600			92,600
Recognized gain	23,600			23,600
Other operating
Reclassifications out of accumulated other comprehensive loss
Other operating expenses	127,226		342,170	830,689	1,037,113
Other operating | Reclassification out of Accumulated Other Comprehensive Income | Foreign currency translation adjustments
Reclassifications out of accumulated other comprehensive loss
Other operating expenses	34,697		$ 0	$ 69,044	$ 0
Other operating | Reclassification out of Accumulated Other Comprehensive Income | Foreign currency translation adjustments | Pullmantur Holdings
Reclassifications out of accumulated other comprehensive loss
Other operating expenses	$ 34,700	$ 34,300