Fair Value Measurements and Derivative Instruments - Derivative Instruments (Details)					3 Months Ended							3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2015 Interest rate swaps USD ($)	Dec. 31, 2014 Interest rate swaps USD ($)	Mar. 31, 2015 Forward Contracts USD ($)	Mar. 31, 2014 Forward Contracts USD ($)	Mar. 31, 2015 Forward Contracts Not Designated USD ($)	Jan. 31, 2014 Forward Contracts Designated as Hedging Instrument USD ($)	Jan. 31, 2014 Forward Contracts Designated as Hedging Instrument EUR (€)	Mar. 31, 2015 Foreign exchange contracts USD ($)	Dec. 31, 2014 Foreign exchange contracts USD ($)	Mar. 31, 2015 Cruise ships on order USD ($)
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												$ 4,900,000,000
Amount deposited for cost of ships on order, including the conditional agreement for a third Quantum - class ship												554,200,000
Percentage of aggregate cost exposed to fluctuations in the euro exchange rate	25.10%	28.80%
Notional amount			2,900,000,000	2,900,000,000			398,200,000	446,400,000	415,600,000	3,100,000,000	3,000,000,000
Change in fair value of foreign currency forward contracts recognized in earnings					$ (28,100,000)	$ 1,900,000