General (Details)	Sep. 30, 2019 brand
Schedule of Equity Method Investments [Line Items]
Number of cruise brands	4
Maximum
Schedule of Equity Method Investments [Line Items]
Investment in a joint venture, percentage of interest	50.00%
Minimum
Schedule of Equity Method Investments [Line Items]
Investment in a joint venture, percentage of interest	20.00%
TUI Cruises
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%