Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jul. 31, 2016
Income Taxes
Operating loss carryforwards				$ 67.6
Deferred income tax expense (benefit)					$ (12.0)	$ (33.5)
Pullmantur
Income Taxes
Income tax expense (benefit)	$ (12.0)
Adjustment of valuation allowance (as a percent)		70.00%				70.00%
Pullmantur | Tax benefit due to change in Spanish Tax Reform
Income Taxes
Deferred income tax expense (benefit)		$ (10.0)
Valuation allowance adjustment, deferred tax expense (benefit)		$ (33.5)
Pullmantur | Trademarks and trade names
Income Taxes
Deferred income tax expense (benefit)			$ (12.0)
Valuation allowance adjustment, deferred tax expense (benefit)			31.4
Deferred Tax Liabilities, Intangible Assets	$ 43.4		$ 43.4
Valuation allowance required as per projections (as a percent)			100.00%
Other income (expense)
Income Taxes
Income tax expense (benefit)				20.1	$ 11.1	$ (20.9)
Tax years between 2016 and 2028
Income Taxes
Operating loss carryforwards				$ 51.8
Tax year 2014 | Pullmantur
Income Taxes
Corporate income tax rate		30.00%
Operating loss carryforward (period)		18 years
Annual limitation of taxable income for NOL carryforward (as a percent)		25.00%
Tax year 2015 | Pullmantur
Income Taxes
Corporate income tax rate					28.00%
Annual limitation of taxable income for NOL carryforward (as a percent)		70.00%
Tax year 2016 | Pullmantur
Income Taxes
Corporate income tax rate				25.00%
Pullmantur and CDF Croisieres De France
Income Taxes
Percentage of subsidiary which has been sold				51.00%			51.00%