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+ 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

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+ References

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+ References

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+ References

No definition available.

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General - Narrative (Details) $ in Millions	1 Months Ended	9 Months Ended		12 Months Ended
General - Narrative (Details) $ in Millions	Jul. 31, 2016	Sep. 30, 2017 ship brand	Sep. 30, 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%
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)