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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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Other Assets (Narrative) (Details) € in Millions			1 Months Ended			3 Months Ended		12 Months Ended
Other Assets (Narrative) (Details) € in Millions	Jun. 30, 2020 USD ($) ship	Jun. 30, 2020 EUR (€) ship	Apr. 30, 2016	Mar. 31, 2009 USD ($)	Mar. 31, 2009 EUR (€)	Jun. 30, 2020 USD ($) ship	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2020 EUR (€)	Sep. 30, 2020 ship	Dec. 31, 2019 EUR (€)	Dec. 31, 2016
Other Assets
Proceeds from the sale of property and equipment								$ 27,796,000	$ 0	$ 0
Gain on sale of equipment								(69,044,000)	0	0
Number of cruise ships held-for-sale \| ship												3
Impairment losses								635,500,000
Principal and Interest payments received								21,086,000	32,870,000	$ 124,238,000
Loss provision for receivables						$ 81,600,000		187,128,000
Write-offs								$ 107,316,000
Minimum
Other Assets
Investment in a joint venture, percentage of interest								20.00%			20.00%
Ownership interest retained, percent								20.00%			20.00%
Maximum
Other Assets
Investment in a joint venture, percentage of interest								50.00%			50.00%
Ownership interest retained, percent								50.00%			50.00%
TUI Cruises GmbH joint venture
Other Assets
Investment in a joint venture, percentage of interest								50.00%			50.00%
Equity and loans due from equity method investee								$ 538,400,000	598,100,000
Equity investment								387,500,000	443,100,000
Loan investment								$ 145,500,000	149,500,000		€ 118.9		€ 133.2
Proceeds from the sale of property and equipment				$ 290,900,000	€ 224.4
Deferred gain on sale				$ 35,900,000
Gain on sale of equipment									21,800,000
Ownership interest retained, percent								50.00%			50.00%
TUI Cruises GmbH joint venture \| TUI cruise ships
Other Assets
Reduction of current ownership interest, minimum allowed (as a percent)								37.55%			37.55%
TUI Cruises GmbH joint venture \| Not Primary Beneficiary
Other Assets
Investment in a joint venture, percentage of interest								50.00%			50.00%
Equity contribution	$ 84,200,000	€ 75.0
Ownership interest retained, percent								50.00%			50.00%
Pullmantur
Other Assets
Investment in a joint venture, percentage of interest								49.00%			49.00%
Ownership interest retained, percent								49.00%			49.00%
Impairment losses						69,000,000.0
Reorganization items						21,600,000
Percentage of subsidiary which has been sold								51.00%			51.00%			51.00%
Loss provision for receivables						$ 103,500,000
Pullmantur \| Not Primary Beneficiary
Other Assets
Retained ownership percentage of subsidiary after sale								49.00%
Maximum loss exposure									49,700,000
Grand Bahamas Shipyard Ltd.
Other Assets
Equity method investment impairment							$ 30,100,000
Grand Bahamas Shipyard Ltd. \| Not Primary Beneficiary
Other Assets
Investment in a joint venture, percentage of interest								40.00%			40.00%
Ownership interest retained, percent								40.00%			40.00%
Payments to related parties for services provided								$ 200,000	45,700,000
Net book value of equity method investment							$ 0
Grand Bahamas Shipyard Ltd. \| Non-accrual status of advances to affiliates \| Not Primary Beneficiary
Other Assets
Interest rate on debt facility provided to related party (as a percent)								5.75%			5.75%
Principal and Interest payments received									8,600,000
Grand Bahamas Shipyard Ltd. \| Loans Receivable \| Not Primary Beneficiary
Other Assets
Loan investment									$ 19,100,000
London Interbank Offered Rate (LIBOR) \| Grand Bahamas Shipyard Ltd. \| Non-accrual status of advances to affiliates \| Minimum \| Not Primary Beneficiary
Other Assets
Margin on floating rate base (as a percent)								2.00%
London Interbank Offered Rate (LIBOR) \| Grand Bahamas Shipyard Ltd. \| Non-accrual status of advances to affiliates \| Maximum \| Not Primary Beneficiary
Other Assets
Margin on floating rate base (as a percent)								3.75%
Splendor of the Seas \| TUI Cruises GmbH joint venture
Other Assets
Interest rate on debt facility provided to related party (as a percent)			6.25%
Debt instrument, term			10 years
Related party guarantor obligation percentage			50.00%
TUI Cruises GmbH joint venture \| Hapag-Lloyd Cruises
Other Assets
Purchase price	$ 1,300,000,000	€ 1,200.0
Springwater Capital LLC \| Pullmantur
Other Assets
Investment in a joint venture, percentage of interest								51.00%			51.00%
Ownership interest retained, percent								51.00%			51.00%
Luxury Liners \| TUI Cruises GmbH joint venture \| Hapag-Lloyd Cruises
Other Assets
Number of ships acquired \| ship	2	2				2
Expedition Ships \| TUI Cruises GmbH joint venture \| Hapag-Lloyd Cruises
Other Assets
Number of ships acquired \| ship	2	2				2
Mein Schiff 1
Other Assets
Property, plant and equipment, useful life				23 years	23 years