Summary of Significant Accounting Policies (Policies)	6 Months Ended
Summary of Significant Accounting Policies (Policies)	Jun. 30, 2016
Accounting Policies [Abstract]
Basis of Accounting	Basis for Preparation of Consolidated Financial Statements The unaudited consolidated financial statements are prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”). Estimates are required for the preparation of financial statements in accordance with these principles. Actual results could differ from these estimates. Refer to Note 2. Summary of Significant Accounting Policies in this Quarterly Report on Form 10-Q and in our Annual Report on Form 10-K for the year ended December 31, 2015 for a discussion of our significant accounting policies.
Basis of Consolidation	All significant intercompany accounts and transactions are eliminated in consolidation. We consolidate entities over which we have control, usually evidenced by a direct ownership interest of greater than 50%, and variable interest entities where we are determined to be the primary beneficiary. Refer to Note 5. Other Assets for further information regarding our variable interest entities. For affiliates we do not control but over which we have significant influence on financial and operating policies, usually evidenced by a direct ownership interest from 20% to 50%, the investment is accounted for using the equity method. Prior to January 1, 2016, we consolidated the operating results of Pullmantur and CDF Croisières de France on a two-month reporting lag to allow for more timely preparation of our consolidated financial statements. Effective January 1, 2016, we eliminated the two-month reporting lag to reflect Pullmantur's and CDF Croisières de France's financial position, results of operations and cash flows concurrently and consistently with the fiscal calendar of the Company ("elimination of the Pullmantur reporting lag"). The elimination of the Pullmantur reporting lag represents a change in accounting principle which we believe to be preferable because it provides more current information to the users of our financial statements. A change in accounting principle requires retrospective application, if material. The impact of the elimination of the reporting lag was immaterial to prior periods and is expected to be immaterial for our fiscal year ended December 31, 2016. As a result, we have accounted for this change in accounting principle in our consolidated results for the first six months of 2016. Accordingly, the results of Pullmantur and CDF Croisières de France for November and December 2015, in addition to the six months ended June 30, 2016, are included in our statement of comprehensive income (loss) for the six months ended June 30, 2016. The effect of this change was a decrease to net income of $21.7 million and this amount is reported within Other income in our consolidated statements of comprehensive income (loss) for the six months ended June 30, 2016.
New Accounting Pronouncements	Recent Accounting Pronouncements In May 2014, amended GAAP guidance was issued to clarify the principles used to recognize revenue for all entities. The guidance is based on the principle that revenue should be recognized to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard also requires more detailed disclosures and provides additional guidance for transactions that were not comprehensively addressed in the prior accounting guidance. Subsequent to the release of this guidance, amended GAAP guidance was issued to provide clarification and additional guidance related to revenue recognition. The revenue recognition guidance discussed above must be applied using one of two retrospective application methods and will be effective for our annual reporting period beginning after December 15, 2017, including interim periods therein. Early adoption is permitted for our annual reporting period beginning after December 15, 2016, including interim periods therein. We are currently evaluating the impact, if any, of the adoption of the revenue recognition guidance to our consolidated financial statements. In August 2014, GAAP guidance was issued requiring management to evaluate, at each annual and interim reporting period, whether there are conditions or events that raise substantial doubt about the entity's ability to continue as a going concern within one year after the date the financial statements are issued and provide related disclosures. This guidance will be effective for our annual reporting period ending after December 15, 2016 and for annual periods and interim periods thereafter. Early adoption is permitted. The adoption of this guidance is not expected to have an impact to our consolidated financial statements. In July 2015, amended GAAP guidance was issued to simplify the measurement of inventory for all entities. The amendments apply to all inventory that is measured using first-in, first-out or average cost. The guidance requires an entity to measure inventory at the lower of cost and net realizable value. The guidance must be applied prospectively and will be effective for our interim and annual reporting periods beginning after December 15, 2016. Early adoption is permitted as of the beginning of an interim or annual reporting period. The adoption of this guidance is not expected to have a material impact to our consolidated financial statements. In November 2015, amended GAAP guidance was issued to simplify the presentation of deferred income taxes. The amendments require that deferred tax liabilities and assets be classified as noncurrent in a classified statement of financial position and eliminates the classification between current and noncurrent amounts. The guidance will be effective for financial statements issued for fiscal years beginning after December 15, 2016 and interim periods within those fiscal years. An entity can elect to adopt the amendments either prospectively or retrospectively. Early adoption is permitted as of the beginning of an interim or annual reporting period. The adoption of this guidance is not expected to have a material impact to our consolidated financial statements. In January 2016, amended GAAP guidance was issued to address certain aspects of recognition, measurement, presentation and disclosure of financial instruments. The amendments primarily impact the accounting for certain equity investments, the accounting for financial liabilities subject to the fair value option and the presentation and disclosure requirements for financial instruments. The guidance will be effective for financial statements issued for fiscal years beginning after December 15, 2017 and interim periods within those fiscal years. Early adoption is permitted for financial statements of fiscal years and interim periods that have not yet been issued or that have not yet been made available for issuance as of the beginning of the fiscal year of adoption. The adoption of this newly issued guidance is not expected to have a material impact to our consolidated financial statements. In February 2016, amended GAAP guidance was issued to increase the transparency and comparability of lease accounting among organizations. For leases with a term greater than 12 months, the amendments require the lease rights and obligations arising from the leasing arrangements, including operating leases, to be recognized as assets and liabilities on the balance sheet. The amendments also expand the required disclosures surrounding leasing arrangements. The guidance must be applied using a retrospective application method and will be effective for financial statements issued for fiscal years beginning after December 15, 2018 and interim periods within those years. Early adoption is permitted. We are currently evaluating the impact of the adoption of this newly issued guidance to our consolidated financial statements. In March 2016, amended GAAP guidance was issued addressing the effect of derivative contract novations on existing hedge accounting relationships. The amendments clarify that a change in the counterparty to a derivative instrument that has been designated as a hedging instrument does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria continue to be met. The guidance must be applied using a prospective or modified retrospective application method and will be effective for financial statements issued for fiscal years beginning after December 15, 2016 and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The adoption of this newly issued guidance is not expected to have a material impact to our consolidated financial statements. In March 2016, amended GAAP guidance was issued addressing contingent put and call options in debt instruments. The amendments clarify the requirements for assessing whether contingent call and put options that can accelerate the payment of principal on debt instruments are clearly and closely related to their debt hosts, or whether the embedded call and put options should be bifurcated from the related debt instrument and accounted for separately as a derivative. The guidance must be applied using a modified retrospective approach and will be effective for financial statements issued for fiscal years beginning after December 15, 2016 and interim periods within those fiscal years. Early adoption is permitted, including adoption in an interim period. The adoption of this newly issued guidance is not expected to have an impact to our consolidated financial statements. In March 2016, amended GAAP guidance was issued to simplify the transition to the equity method of accounting. The amendments eliminate the requirement that when an investment qualifies for use of the equity method as a result of an increase in the level of ownership interest or degree of influence, an investor must adjust the investment, results of operations and retained earnings retroactively on a step-by step basis as if the equity method had been in effect during all previous periods that the investment had been held. The guidance must be applied prospectively and will be effective for financial statements issued for fiscal years beginning after December 15, 2016 and interim periods within those fiscal years. Early adoption is permitted. The adoption of this newly issued guidance is not expected to have a material impact to our consolidated financial statements, but could have an impact on our accounting for equity method investments in the future. In March 2016, amended GAAP guidance was issued to simplify several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The guidance will be effective for annual periods beginning after December 15, 2016 and interim periods within those annual periods. Early adoption is permitted, including adoption in an interim period. The adoption of this newly issued guidance is not expected to have a material impact to our consolidated financial statements. In June 2016, amended GAAP guidance was issued to address expected credit losses on financial instruments and other commitments. The amendment requires financial assets and net investment leases that are currently measured at amortized cost basis be presented at the net amount expected to be collected. The guidance must be applied using the modified-retrospective approach and will be effective for annual periods beginning after December 15, 2019 and interim periods within those annual periods. Early adoption is permitted beginning after December 15, 2018. The adoption of this newly issued guidance is not expected to have a material impact to our consolidated financial statements.
Other	Other Revenues and expenses include port costs that vary with guest head counts. The amounts of such port costs included in Passenger ticket revenues on a gross basis were $140.0 million and $141.7 million for the second quarters of 2016 and 2015, respectively
Reclassification	Reclassifications On January 1, 2016, we adopted ASC 835, Presentation of Debt Issuance Costs ("ASC 835"), using the retrospective approach. Due to the adoption of ASC 835, $139.8 million of debt issuance costs have been reclassified in the consolidated balance sheet, as of December 31, 2015, from Other assets to either Current portion of long-term debt or Long-term debt in order to conform to the current year presentation. For the six months ended June 30, 2015, $4.0 million has been reclassified in the consolidated statements of cash flows from Other, net to Dividends received from unconsolidated affiliates within Net cash provided by operating activities in order to conform to the current year presentation.