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General - Narrative (Details) $ in Billions | 1 Months Ended |
--- | --- | ---
Jul. 31, 2018 USD ($) ship continent shares | Jun. 30, 2018 brand
Schedule of Equity Method Investments [Line Items] |  |
Number of cruise brands | brand |  | 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 |  |
Schedule of Equity Method Investments [Line Items] |  |
Investment in a joint venture, percentage of interest |  | 36.00%
Subsequent Event | Silversea Cruises |  |
Schedule of Equity Method Investments [Line Items] |  |
Percentage of interests acquired | 66.70% |
Number of cruise ships | ship | 9 |
Number of continents of operations | continent | 7 |
Purchase price | $ | $ 1.0 |
Contingent consideration (in shares) | shares | 472,000 |

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