Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
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Percentage of Aggregate Cost Exposed to Fluctuations in the Euro Exchange Rate.

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Purchase Contract, Deposit.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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-SubTopic 30
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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-Name Accounting Standards Codification
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Amount of gain (loss) recognized in earnings in the period from the increase (decrease) in fair value of foreign currency derivatives not designated as hedging instruments.

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- Definition

The minimum amount the entity agreed to spend under the long-term purchase commitment.

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No definition available.

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Fair Value Measurements and Derivative Instruments (Derivative Instruments) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2015 EUR (€)
Derivative instruments disclosure
Aggregate cost of ships on order	$ 7,800.0
Amount deposited for cost of ships on order	$ 546.5
Percentage of aggregate cost exposed to fluctuations in the euro exchange rate	58.20%	28.80%		58.20%
Exchange gains (losses) recorded in other income (expense)	$ 34.6	$ 49.5	$ 13.4
Foreign currency forward \| Not Designated
Derivative instruments disclosure
Notional amount	514.4
Change in fair value of foreign currency forward contracts recognized in earnings	(55.5)	(48.6)	(19.3)
Exchange gains (losses) recorded in other income (expense)	34.6	49.5	$ 13.4
Foreign exchange contracts
Derivative instruments disclosure
Notional amount	2,400.0	$ 3,000.0
Forward Contracts \| Designated as Hedging Instrument \| Pullmantur and TUI Cruises
Derivative instruments disclosure
Notional amount	$ 328.3			€ 302,000,000
$742.1 million unsecured senior notes, LIBOR plus 1.30%, currently 1.83%, due through 2027
Derivative instruments disclosure
Unsecured term loan, face amount \| €				€ 742,100,000.0