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Other Assets - Narrative (Details) € in Millions		1 Months Ended	3 Months Ended
Other Assets - Narrative (Details) € in Millions	Feb. 07, 2020 EUR (€) ship	Apr. 30, 2016	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2020 EUR (€)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2019 USD ($)
Other Assets
Equity method investments, other than temporary impairment			$ 39,700,000
Proceeds from collection of advance to affiliate			$ 5,160,000	$ 11,824,000
Loan loss allowance						$ 5,700,000		$ 5,600,000
TUI Cruises GmbH joint venture
Other Assets
Percentage of ownership interest					50.00%	50.00%
TUI Cruises GmbH joint venture \| Not Primary Beneficiary
Other Assets
Percentage of ownership interest					50.00%	50.00%
Investments in entity						$ 613,900,000		598,100,000
Underlying equity in net assets						467,900,000		443,100,000
Advances to affiliate					€ 130.8	$ 143,500,000	€ 133.2	149,500,000
TUI Cruises GmbH joint venture \| TUI cruise ships
Other Assets
Restriction on reduction of current ownership interest (as a percent)					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%
Percentage of subsidiary which has been sold					51.00%	51.00%
Loan loss allowance						$ 38,100,000
Pullmantur Holdings \| Not Primary Beneficiary
Other Assets
Advances to affiliate					€ 15.0	$ 16,500,000
Interest rate on loan provided to related party (as a percent)					6.50%	6.50%
Debt, guaranteed percentage			51.00%
Retained ownership percentage of subsidiary after sale			49.00%
Maximum loss exposure								49,700,000
Proceeds from credit facility					€ 11.4	$ 12,500,000	€ 11.0	12,300,000
Grand Bahamas Shipyard Ltd.
Other Assets
Proceeds from collection of advance to affiliate			$ 0	6,600,000
Grand Bahamas Shipyard Ltd. \| Not Primary Beneficiary
Other Assets
Percentage of ownership interest					40.00%	40.00%
Investments in entity						$ 24,000,000.0		47,900,000
Underlying equity in net assets								27,000,000.0
Related party transaction, payment amount for ship repair and maintenance			200,000	$ 40,300,000
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%
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%
Springwater Capital LLC \| Pullmantur Holdings
Other Assets
Percentage of ownership interest					51.00%	51.00%
TUI Cruises GmbH joint venture \| Hapag-Lloyd Cruises [Member]
Other Assets
Purchase price \| €	€ 75.0
TUI Cruises GmbH joint venture \| Luxury Liners [Member] \| Hapag-Lloyd Cruises [Member]
Other Assets
Number of cruise ships acquired \| ship	2
TUI Cruises GmbH joint venture \| Expedition Ships [Member] \| Hapag-Lloyd Cruises [Member]
Other Assets
Number of cruise ships acquired \| ship	3