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General - Narrative (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 31, 2016 | Mar. 31, 2017 ship brand | Mar. 31, 2016 USD ($) | Dec. 31, 2015
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% |  |
Percentage of subsidiary which has been sold | 51.00% | 51.00% |  |
Retained ownership percentage of subsidiary after sale | 49.00% | 49.00% |  |
Number of cruise ships | ship |  | 4 |  |
Time lag in consolidation |  |  |  | 2 months
Other income (expense) | Pullmantur and CDF Croisieres de France |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Income (loss) from Subsidiaries (two months lag elimination) | $ |  |  | $ (21.7) |

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