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Summary of Significant Accounting Policies - Additional Information (Detail Textuals) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accounting Policies [Abstract]
Number of exculdes shares, as including these would be antidilutive	4,745,812
Amounts of tax included on a gross basis	$ 51.9nclh_BusinessAndOtherTaxesOnRevenues	$ 37.9nclh_BusinessAndOtherTaxesOnRevenues

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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