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General - Narrative (Details) | Mar. 31, 2018 brand
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Schedule of Equity Method Investments [Line Items] |
Number of cruise brands | 3
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 and CDF Croisieres de France |
Schedule of Equity Method Investments [Line Items] |
Investment in a joint venture, percentage of interest | 49.00%
SkySea Cruises [Member] |
Schedule of Equity Method Investments [Line Items] |
Investment in a joint venture, percentage of interest | 36.00%

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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571 + Details
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