General (Details) $ / shares in Units, destination in Thousands, € in Billions				3 Months Ended
	Jul. 09, 2020 $ / shares shares	Jun. 30, 2020 USD ($)	Jun. 30, 2020 EUR (€)	Mar. 31, 2021 USD ($)	Apr. 30, 2022 USD ($)	Jan. 19, 2021 ship	Dec. 31, 2020 USD ($) brand ship continent destination $ / shares shares	Oct. 31, 2020 $ / shares	Aug. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) $ / shares shares	Dec. 31, 2018	Jul. 31, 2018
Schedule of Equity Method Investments [Line Items]
Number of cruise brands | brand							4
Number of ships in operation | ship							61
Number of destinations | destination							1
Interest acquired	33.30%
Common stock, shares issued (in shares) | shares	5,200,000						265,198,371			236,547,842
Common stock, par value (in dollars per share) | $ / shares	$ 0.01						$ 0.01	$ 0.01		$ 0.01
Liquidity							$ 4,400,000,000
Cash and cash equivalents							3,684,474,000			$ 243,738,000
Debt subject to covenant testing							11,200,000,000
Deferred amortization of debt, debt holiday							900,000,000
Credit card processor agreement, amount held in reserve							75,000,000.0
Credit card processor agreement, maximum exposure							200,000,000.0
Scenario, Forecast
Schedule of Equity Method Investments [Line Items]
Deferred amortization of debt, debt holiday				$ 800,000,000
Debt covenant, minimum monthly liquidity requirement				500,000,000
Debt covenant, minimum monthly liquidity amount if additional capital is raised				350,000,000.0
Minimum additional capital to be raised to reduce minimum liquidity covenant				500,000,000
Debt coming due					$ 1,000,000,000.0
Non-Export Credit Facilities | Scenario, Forecast
Schedule of Equity Method Investments [Line Items]
Long-term debt				4,900,000,000
Export Credit Facilities | Scenario, Forecast
Schedule of Equity Method Investments [Line Items]
Long-term debt				6,200,000,000
Term Loan Facility, $700 Million | Credit agreement
Schedule of Equity Method Investments [Line Items]
Maximum borrowing capacity							$ 700,000,000		$ 700,000,000
Azamara | Disposal Group, Held-for-sale, Not Discontinued Operations | Scenario, Forecast
Schedule of Equity Method Investments [Line Items]
Proceeds from disposal				$ 201,000,000.0
Subsequent event | Azamara | Disposal Group, Held-for-sale, Not Discontinued Operations
Schedule of Equity Method Investments [Line Items]
Number of ships to be disposed of | ship						3
Minimum
Schedule of Equity Method Investments [Line Items]
Investment in a joint venture, percentage of interest							20.00%
Maximum
Schedule of Equity Method Investments [Line Items]
Investment in a joint venture, percentage of interest							50.00%
TUI Cruises GmbH joint venture
Schedule of Equity Method Investments [Line Items]
Investment in a joint venture, percentage of interest							50.00%
Pullmantur
Schedule of Equity Method Investments [Line Items]
Investment in a joint venture, percentage of interest							49.00%
Hapag-Lloyd Cruises | TUI Cruises GmbH joint venture
Schedule of Equity Method Investments [Line Items]
Purchase price		$ 1,300,000,000	€ 1.2
Silversea Cruises
Schedule of Equity Method Investments [Line Items]
Number of continents | continent							7
Percentage of business acquired											66.70%	66.70%