Fair Value Measurements and Derivative Instruments (Details 4)	9 Months Ended			3 Months Ended		9 Months Ended						9 Months Ended
	Sep. 30, 2013 USD ($)	Dec. 31, 2012	Jun. 30, 2013 Unsecured senior notes 5.625% due 2014 EUR (€)	Sep. 30, 2013 Forward Contracts USD ($)	Sep. 30, 2012 Forward Contracts USD ($)	Sep. 30, 2013 Forward Contracts USD ($)	Sep. 30, 2012 Forward Contracts USD ($)	Sep. 30, 2013 Forward Contracts Not Designated USD ($)	Sep. 30, 2013 Foreign exchange contracts USD ($)	Dec. 31, 2012 Foreign exchange contracts USD ($)	Jun. 30, 2013 Foreign currency forward Cash flow hedge EUR (€)	Sep. 30, 2013 Cruise ships on order USD ($)	Oct. 31, 2013 Cruise ships on order Foreign currency forward
Gains and losses from derivatives involved in hedging relationships
Aggregate cost of ships on order, including the conditional agreement for a third Quantum - class ship	$ 4,700,000,000											$ 4,700,000,000
Amount deposited for cost of ships on order, including the conditional agreement for a third Quantum - class ship	335,700,000											335,700,000
Percentage of aggregate cost exposed to fluctuations in the euro exchange rate	45.00%	49.70%										45.00%	36.70%
Notional amount								436,400,000	2,100,000,000	1,200,000,000	365,000,000
Long term debt, principal amount			745,000,000
Interest rate on debt instrument (as a percent)			5.625%
Change in fair value of foreign currency forward contracts recognized in earnings				$ 16,900,000	$ 4,500,000	$ (8,600,000)	$ 8,700,000