Long-Term Debt (Details 2)	12 Months Ended		12 Months Ended		12 Months Ended									12 Months Ended			12 Months Ended
	Dec. 31, 2012 USD ($)	Dec. 31, 2012 Credit agreement USD ($)	Dec. 31, 2012 Revolving credit facility due July 2016 USD ($)	Dec. 31, 2012 Revolving credit facility due November 2014 USD ($)	Dec. 31, 2012 Unsecured term loan due in February 2016 USD ($)	Dec. 31, 2011 Unsecured term loan due in February 2016	Dec. 31, 2012 Unsecured term loans guaranteed by an export credit agency Minimum	Dec. 31, 2012 Unsecured term loans guaranteed by an export credit agency Maximum	Dec. 31, 2012 Unsecured term loans guaranteed by an export credit agency Up-front Payment Arrangement Minimum	Dec. 31, 2012 Unsecured term loans guaranteed by an export credit agency Up-front Payment Arrangement Maximum	Dec. 31, 2012 Unsecured Euro-denominated term loan facility USD ($)	Dec. 31, 2012 Unsecured Euro-denominated term loan facility EUR (€)	Dec. 31, 2011 Unsecured Euro-denominated term loan facility	Dec. 31, 2012 Fixed rate of 5.625% unsecured senior notes Cross currency swaps USD ($)	Dec. 31, 2012 Fixed rate of 5.625% unsecured senior notes Cross currency swaps EUR (€)	Dec. 31, 2011 Fixed rate of 5.625% unsecured senior notes Cross currency swaps	Dec. 31, 2012 Celebrity Reflection term loan USD ($)	Dec. 31, 2011 Celebrity Reflection term loan	Apr. 30, 2013 Celebrity Reflection floating rate debt Interest rate swap agreement Effective April 2013	Dec. 31, 2012 Unsecured senior notes 5.25% due 2022	Nov. 30, 2012 Unsecured senior notes 5.25% due 2022 USD ($)
Long-Term Debt
Interest rate on debt instrument (as a percent)														5.625%		5.625%					5.25%
Maximum borrowing capacity under credit agreement											$ 481,200,000	€ 365,000,000
Borrowing capacity		1,600,000,000	1,100,000,000	525,000,000
Additional borrowing capacity available			67,000,000
Floating rate base					LIBOR						EURIBOR						LIBOR
Margin on floating rate base (as a percent)					2.50%						3.00%						0.40%
Commitment fee on undrawn amount (as a percent)											1.05%
Prepayment of unsecured floating rate term loan											100,000,000
Increase in capacity			233,000,000
Maximum cash purchase through extended tender offer														328,000,000	255,000,000
Premium, fees and related cost of repurchase of unsecured debt	344,589,000													344,600,000
Loss on early extinguishment of debt	7,501,000													7,500,000
Long term debt, principal amount					$ 290,000,000										€ 1,000,000,000		$ 673,500,000				$ 650,000,000
Credit agency fees, percentage of outstanding loan balance							0.88%	1.48%
Credit agency fees, percentage of maximum loan amount payable									2.30%	2.37%
Percentage of unsecured term loan guaranteed by Hermes																	95.00%
Unsecured term loan, amortization period																	12 years
Debt instrument variable rate of interest (as a percent)					2.72%	2.72%											1.03%	1.03%
Fixed rate (as a percent)														6.68%					2.85%
Long term debt, due date (year)					2016	2016					2017		2017				2024	2024		2022