Aggregate notional amount of derivative expressed in nonmonetary units. For example, the number of barrels specified in a fuel oil forward purchase contract.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

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- Definition

Amount of increase (decrease) of an intangible asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

No definition available.

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- Definition

Long Term Borrowings Amount of Carrying Value Below Fair Value

+ References

No definition available.

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- Definition

Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Fair Value Measurements and Derivatives (Detail Textuals) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 Fuel Swaps Metric_Ton	Dec. 31, 2014 Foreign currency options USD ($)	Dec. 31, 2014 Foreign currency options EUR (€)	Dec. 31, 2014 Foreign currency collar USD ($)	Dec. 31, 2014 Foreign currency collar EUR (€)	Dec. 31, 2014 Interest rates swaps USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Projected fuel purchases			1,300,000
Notional amount of derivatives				$ 446.1	€ 364.5	$ 332.0	€ 274.4	$ 1,300.0
Fair value of long-term debt	6,229.1us-gaap_LongTermDebtFairValue	3,146.4us-gaap_LongTermDebtFairValue
Fair value of long-term debt in excess of carrying value	45.0	18.6
Increase in goodwill	985.1us-gaap_GoodwillPeriodIncreaseDecrease
Increase in intangibles	$ 800nclh_IntangiblePeriodIncreaseDecrease