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The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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The cash inflow from the collection of money previously advanced to an entity that is related to it but not strictly controlled.

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Amount of transactions with related party during the financial reporting period.

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Total amount of reorganization items.

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Percentage of subsidiary's or equity investee's stock owned by parent company after stock transaction.

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No definition available.

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The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

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Other Assets - Narrative (Details) € in Millions			1 Months Ended	3 Months Ended				9 Months Ended
Other Assets - Narrative (Details) € in Millions	Jun. 30, 2020 USD ($) ship	Jun. 30, 2020 EUR (€) ship	Apr. 30, 2016	Sep. 30, 2020 USD ($) ship	Jun. 30, 2020 USD ($) ship	Mar. 31, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) ship	Sep. 30, 2019 USD ($)	Sep. 30, 2020 EUR (€) ship	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)
Other Assets
Number of cruise ships held-for-sale \| ship				3				3		3
Equity method investments, other than temporary impairment						$ 39,700,000
Proceeds from collection of advance to affiliate								$ 15,581,000	$ 27,697,000
TUI Cruises GmbH joint venture
Other Assets
Percentage of ownership interest				50.00%				50.00%		50.00%
TUI Cruises GmbH joint venture \| Not Primary Beneficiary
Other Assets
Percentage of ownership interest				50.00%				50.00%		50.00%
Equity contribution	$ 84,200,000	€ 75.0
Investments in entity				$ 617,800,000				$ 617,800,000			$ 598,100,000
Underlying equity in net assets				467,400,000				467,400,000			443,100,000
Advances to affiliate				$ 144,100,000				$ 144,100,000		€ 122.9	149,500,000	€ 133.2
TUI Cruises GmbH joint venture \| TUI cruise ships
Other Assets
Restriction on reduction of current ownership interest (as a percent)				37.55%				37.55%		37.55%
TUI Cruises GmbH joint venture \| Splendour of the Seas \| Not Primary Beneficiary
Other Assets
Debt instrument, term			10 years
Pullmantur Holdings
Other Assets
Percentage of ownership interest				49.00%				49.00%		49.00%
Impairment loss					$ 69,000,000.0
Reorganization expenses					21,600,000
Pullmantur Holdings \| Not Primary Beneficiary
Other Assets
Advances to affiliate				$ 17,600,000				$ 17,600,000		€ 15.0
Interest rate on loan provided to related party (as a percent)				6.50%				6.50%		6.50%
Retained ownership percentage of subsidiary after sale								49.00%
Facility receivable, writeoff				$ 1,900,000	$ 18,300,000	12,500,000
Proceeds from credit facility											12,300,000	€ 11.0
Maximum loss exposure											49,700,000
Grand Bahamas Shipyard Ltd.
Other Assets
Proceeds from collection of advance to affiliate							$ 7,600,000	$ 0	14,200,000
Grand Bahamas Shipyard Ltd. \| Not Primary Beneficiary
Other Assets
Percentage of ownership interest				40.00%				40.00%		40.00%
Investments in entity				$ 0				$ 0			47,900,000
Underlying equity in net assets											27,000,000.0
Maximum loss exposure				$ 21,100,000				21,100,000
Related party transaction, payment amount for ship repair and maintenance							$ 400,000	$ 200,000	$ 45,500,000
Equity method investments, other than temporary impairment						$ 30,100,000
Grand Bahamas Shipyard Ltd. \| Not Primary Beneficiary \| Non-accrual status of advances to affiliates
Other Assets
Advances to affiliate											$ 20,900,000
Interest rate on loan provided to related party (as a percent)				5.75%				5.75%		5.75%
Grand Bahamas Shipyard Ltd. \| Not Primary Beneficiary \| Non-accrual status of advances to affiliates \| LIBOR \| Minimum
Other Assets
Debt instrument, basis spread on variable rate								2.00%
Grand Bahamas Shipyard Ltd. \| Not Primary Beneficiary \| Non-accrual status of advances to affiliates \| LIBOR \| Maximum
Other Assets
Debt instrument, basis spread on variable rate								3.75%
Splendour of the Seas \| TUI Cruises GmbH joint venture \| Not Primary Beneficiary
Other Assets
Interest rate on loan provided to related party (as a percent)			6.25%
Debt, guaranteed percentage			50.00%
TUI Cruises GmbH joint venture \| Hapag-Lloyd Cruises
Other Assets
Purchase price	$ 1,300,000,000	€ 1,200.0
TUI Cruises GmbH joint venture \| Luxury Liners \| Hapag-Lloyd Cruises
Other Assets
Number of cruise ships acquired \| ship	2	2			2
TUI Cruises GmbH joint venture \| Expedition Ships \| Hapag-Lloyd Cruises
Other Assets
Number of cruise ships acquired \| ship	2	2			2
Springwater Capital LLC \| Pullmantur Holdings
Other Assets
Percentage of ownership interest				51.00%				51.00%		51.00%