Fair Value Measurements and Derivative Instruments - Derivative Instruments (Details)	6 Months Ended				3 Months Ended		6 Months Ended						6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Interest rate swaps USD ($)	Dec. 31, 2013 Interest rate swaps USD ($)	Jun. 30, 2014 Forward Contracts USD ($)	Jun. 30, 2013 Forward Contracts USD ($)	Jun. 30, 2014 Forward Contracts USD ($)	Jun. 30, 2013 Forward Contracts USD ($)	Jun. 30, 2014 Forward Contracts Not Designated USD ($)	Jan. 31, 2014 Forward Contracts Designated as Hedging Instrument EUR (€)	Jun. 30, 2014 Foreign exchange contracts USD ($)	Dec. 31, 2013 Foreign exchange contracts USD ($)	Jun. 30, 2014 Cruise ships on order USD ($)
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													$ 4,800,000,000
Amount deposited for cost of ships on order, including the conditional agreement for a third Quantum - class ship													525,400,000
Percentage of aggregate cost exposed to fluctuations in the euro exchange rate	16.30%	36.30%
Document Fiscal Year Focus	2014
Notional amount			2,900,000,000	3,000,000,000					459,800,000	415,600,000	3,400,000,000	2,500,000,000
Change in fair value of foreign currency forward contracts recognized in earnings					$ 9,000,000	$ (16,900,000)	$ 10,800,000	$ (25,500,000)