Revenue (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Capitalized Contract Cost [Line Items]
Total revenues	$ 1,532,133	$ 2,208,805	$ 10,950,661
Refunds	38,800	95,800
Contract liabilities	814,300	124,800
Contract assets	52,900	53,700
Contract With Customer, Liability, Future Cruise Credits	600,000
Commissions, transportation and other
Capitalized Contract Cost [Line Items]
Capitalized contract costs	$ 75,400	1,100
Minimum
Capitalized Contract Cost [Line Items]
Duration of cruises	1 day
Maximum
Capitalized Contract Cost [Line Items]
Duration of cruises	25 days
Port Costs
Capitalized Contract Cost [Line Items]
Total revenues	$ 104,800	$ 125,000	$ 666,800