Contingencies	12 Months Ended
Contingencies	Nov. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies Litigation We are routinely involved in legal proceedings, claims, disputes, regulatory matters and governmental inspections or investigations arising in the ordinary course of or incidental to our business, including those noted below. Additionally, as a result of the impact of COVID-19, litigation claims, enforcement actions, regulatory actions and investigations, including, but not limited to, those arising from personal injury and loss of life, have been and may, in the future, be asserted against us. We expect many of these claims and actions, or any settlement of these claims and actions, to be covered by insurance and historically the maximum amount of our liability, net of any insurance recoverables, has been limited to our self-insurance retention levels. We record provisions in the consolidated financial statements for pending litigation when we determine that an unfavorable outcome is probable and the amount of the loss can be reasonably estimated. Legal proceedings and government investigations are subject to inherent uncertainties, and unfavorable rulings or other events could occur. Unfavorable resolutions could involve substantial monetary damages. In addition, in matters for which conduct remedies are sought, unfavorable resolutions could include an injunction or other order prohibiting us from selling one or more products at all or in particular ways, precluding particular business practices or requiring other remedies. An unfavorable outcome might result in a material adverse impact on our business, results of operations, financial position or liquidity. As previously disclosed, on May 2, 2019, the Havana Docks Corporation filed a lawsuit against Carnival Corporation in the U.S. District Court for the Southern District of Florida under Title III of the Cuban Liberty and Democratic Solidarity Act, also known as the Helms-Burton Act, alleging that Carnival Corporation “trafficked” in confiscated Cuban property when certain ships docked at certain ports in Cuba, and that this alleged “trafficking” entitles the plaintiffs to treble damages. The hearings on motions for summary judgment were concluded on January 18, 2022. On March 21, 2022, the court granted summary judgment in favor of Havana Docks Corporation as to liability. On August 31, 2022, the court determined that the trebling provision of the Helms-Burton statute applies to damages and interest and accordingly, we adjusted our estimated liability for this matter. On December 30, 2022, the court entered judgment against Carnival in the amount of $110 million plus $4 million in fees and costs. We have filed an appeal and as of November 20, 2023, the matter was fully briefed. As previously disclosed, on April 8, 2020, DeCurtis LLC (“DeCurtis”), a former vendor, filed an action against Carnival Corporation in the U.S. District Court for the Middle District of Florida seeking declaratory relief that DeCurtis is not infringing on several of Carnival Corporation’s patents in relation to its OCEAN Medallion systems and technology. On April 10, 2020, Carnival Corporation filed an action against DeCurtis in the U.S. District Court for the Southern District of Florida for breach of contract, trade secrets violations and patent infringement. These two cases were consolidated in the Southern District of Florida. On March 10, 2023, the jury returned a verdict finding that DeCurtis had breached its contract with Carnival Corporation and infringed on the Carnival Corporation patent. The jury awarded Carnival Corporation a total of $21 million in damages. On April 30, 2023, DeCurtis filed for bankruptcy protection in the United States Bankruptcy Court for the District of Delaware. Carnival Corporation is defending its interests in the bankruptcy matter. COVID-19 Actions We have been named in a number of individual actions related to COVID-19. These actions include tort claims based on a variety of theories, including negligence and failure to warn. The plaintiffs in these actions allege a variety of injuries: some plaintiffs confined their claim to emotional distress, while others allege injuries arising from testing positive for COVID-19. A smaller number of actions include wrongful death claims. Substantially all of these individual actions have now been dismissed or settled for immaterial amounts. As of November 30, 2023, two purported class actions brought against us by former guests in the Federal Court in Australia and in Italy remain pending. These actions include claims based on a variety of theories, including negligence, gross negligence and failure to warn, physical injuries and severe emotional distress associated with being exposed to and/or contracting COVID-19 onboard our ships. On October 24, 2023, the court in the Australian matter held that we were liable for negligence and for breach of consumer protection warranties as it relates to the lead plaintiff. The court ruled that the lead plaintiff was not entitled to any pain and suffering or emotional distress damages on the negligence claim and awarded medical costs. In relation to the consumer protection warranties claim, the court found that distress and disappointment damages amounted to no more than the refund already provided to guests and therefore made no further award. Further proceedings will determine the applicability of this ruling to the remaining class participants. Additionally, on December 6, 2023, the High Court of Australia ruled on appeal that United States and United Kingdom passengers were properly included in the class, regardless of the ticket contract terms applicable to those passengers. We believe the ultimate outcome of these matters will not have a material impact on our consolidated financial statements. All COVID-19 matters seek monetary damages and most seek additional punitive damages in unspecified amounts. We continue to take actions to defend against the above claims. Regulatory or Governmental Inquiries and Investigations We have been, and may continue to be, impacted by breaches in data security and lapses in data privacy, which occur from time to time. These can vary in scope and range from inadvertent events to malicious motivated attacks. We have incurred legal and other costs in connection with cyber incidents that have impacted us. The penalties and settlements paid in connection with cyber incidents over the last three years were not material. While these incidents did not have a material adverse effect on our business, results of operations, financial position or liquidity, no assurances can be given about the future and we may be subject to future litigation, attacks or incidents that could have such a material adverse effect. On March 14, 2022, the U.S. Department of Justice and the U.S. Environmental Protection Agency notified us of potential civil penalties and injunctive relief for alleged Clean Water Act violations by owned and operated vessels covered by the 2013 Vessel General Permit. We are working with these agencies to reach a resolution of this matter. We believe the ultimate outcome will not have a material impact on our consolidated financial statements. Other Contingent Obligations Some of the debt contracts we enter into include indemnification provisions obligating us to make payments to the counterparty if certain events occur. These contingencies generally relate to changes in taxes or changes in laws which increase the lender’s costs. There are no stated or notional amounts included in the indemnification clauses, and we are not able to estimate the maximum potential amount of future payments, if any, under these indemnification clauses. We have agreements with a number of credit card processors that transact customer deposits related to our cruise vacations. Certain of these agreements allow the credit card processors to request, under certain circumstances, that we provide a reserve fund in cash. Although the agreements vary, these requirements may generally be satisfied either through a withheld percentage of customer payments or providing cash funds directly to the credit card processor. As of November 30, 2023 and November 30, 2022, we had $844 million and $1.7 billion in reserve funds. Additionally, as of November 30, 2023 and November 30, 2022, we had $108 million and $229 million in compensating deposits we are required to maintain and $50 million of cash collateral in escrow. Of these balances, $819 million is included within prepaid expenses and other and $183 million is included within other assets as of November 30, 2023. In November 2023, we amended our agreement with one of our credit card processors, following which substantially all of the remaining credit card reserves were returned during the first quarter of 2024.

The entire disclosure for loss and gain contingencies. Describes any existing condition, situation, or set of circumstances involving uncertainty as of the balance sheet date (or prior to issuance of the financial statements) as to a probable or reasonably possible loss incurred by an entity that will ultimately be resolved when one or more future events occur or fail to occur, and typically discloses the amount of loss recorded or a range of possible loss, or an assertion that no reasonable estimate can be made.