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, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Taxes
Operating Loss Carryforwards				$ 309.7
Pullmantur
Income Taxes
Valuation allowance adjustment, deferred tax expense (benefit)		$ (33.5)
Deferred 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
Valuation allowance adjustment, deferred tax expense (benefit)		$ (33.5)			$ (33.5)
Deferred Income Tax Expense (Benefit)					(10.0)
Pullmantur | Trademarks and trade names
Income Taxes
Valuation allowance required as per projections (as a percent)			100.00%
Valuation allowance adjustment, deferred tax expense (benefit)			$ 31.4
Deferred Tax Liabilities, Intangible Assets	$ 43.4		43.4
Deferred Income Tax Expense (Benefit)			$ (12.0)
Other income (expense)
Income Taxes
Income tax expense (benefit)				11.1	$ (20.9)	$ 24.9
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%
Tax years between 2016 and 2028
Income Taxes
Operating Loss Carryforwards				50.0
Tax period-Indefinite
Income Taxes
Operating Loss Carryforwards				$ 259.7