Summary of Significant Accounting Policies (Narrative) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) brand segment	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Exchange gains (losses) recorded in other income (expense)	$ 24,300	$ (1,500)	$ 400
Derivative instrument, credit risk exposure	$ 1,900	26,900
Number of cruise brands | brand	3
Number of operating segments | segment	1
Accounting Standards Update [Extensible Enumeration]	Accounting Standards Update 2020-06 [Member]
Decrease to retained earnings	$ (302,276)	(5,562,775)
Cumulative Effect, Period of Adoption, Adjustment | Pro Forma
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease to retained earnings	146,000
Decrease to additional paid in capital	308,000
Increase to long-term debt	$ 162,000
Lower Limit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Investment in a joint venture, percentage of interest	20.00%
Upper Limit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Investment in a joint venture, percentage of interest	50.00%
Ships | Lower Limit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, useful life	30 years
Residual value, percentage	10.00%
Drydock services period	30 months
Ships | Upper Limit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Property, plant and equipment, useful life	35 years
Residual value, percentage	15.00%
Drydock services period	60 months
Media advertising
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Advertising costs	$ 303,200	138,100	309,400
Brochure, production and direct mail costs
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Advertising costs	$ 88,900	$ 69,100	$ 156,000
TUI Cruises | Not Primary Beneficiary
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Investment in a joint venture, percentage of interest	50.00%