Organization	12 Months Ended
Organization	Sep. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization Organization We were established by the Mohegan Tribe of Indians of Connecticut (the “Mohegan Tribe”) in July 1995. We have the exclusive authority to conduct and regulate gaming activities for the Mohegan Tribe on tribal lands and the non-exclusive authority to conduct such activities elsewhere. We are primarily engaged in the ownership, operation and development of integrated entertainment facilities. We currently own two facilities in the United States and operate or manage five other facilities in the United States and Canada. We are also currently developing a facility in South Korea, the Inspire Entertainment Resort located adjacent to the Incheon International Airport (“Inspire Korea”). Our Properties Mohegan Sun We own Mohegan Sun which is located on an approximately 196-acre site on the Mohegan Tribe's reservation overlooking the Thames River. The facility is one of two authorized gaming and entertainment facilities in the state of Connecticut and competes primarily with gaming operations in Massachusetts, Rhode Island and New York. Mohegan Pennsylvania We own Mohegan Pennsylvania which is located on an approximately 400-acre site in Wilkes-Barre, Pennsylvania, and features live harness racing. The facility is one of 16 gaming and entertainment facilities in the state of Pennsylvania and competes primarily with facilities in Bethlehem and Mount Pocono. Inspire Korea In February 2016, Inspire Integrated Resort Co., Ltd. (“Inspire Integrated Resort”), a wholly-owned subsidiary, was awarded pre-approval for a gaming license to be issued upon completion of the construction of Inspire Korea in South Korea. This license would permit gaming only by holders of non-Korean passports. In August 2016, we entered into an agreement with the Incheon International Airport Authority for the long-term lease and development of approximately 4.4 million square meters of land located directly adjacent to Terminal 2 of the Incheon International Airport. The integrated entertainment resort phase of Inspire Korea is planned to open in late 2023, with the casino anticipated to open in January 2024. Inspire Korea will compete primarily with another casino resort located in Incheon and several other smaller casino-only operations located in downtown Seoul. Niagara Resorts We operate the Niagara Resorts under a Casino Operating and Services Agreement. The Niagara Resorts include Fallsview Casino Resort, Casino Niagara and the OLG Stage at Fallsview Casino, all in Niagara Falls, Canada. Fallsview Casino Resort, which overlooks the iconic Horseshoe Falls, and Casino Niagara are the only two gaming and entertainment facilities in Niagara Falls, Canada. The Niagara Resorts compete primarily with facilities in Toronto, Ontario and Niagara Falls, New York. Mohegan Casino Las Vegas We operate Mohegan Casino Las Vegas, a more than 60,000-square-foot gaming facility at Virgin Hotels Las Vegas, in Las Vegas, Nevada. The integrated resort, including Mohegan Casino Las Vegas, competes primarily with resorts and casinos in Las Vegas. ilani Casino Resort We developed and currently operate ilani Casino Resort in Clark County, Washington, a gaming and entertainment facility owned by the federally-recognized Cowlitz Indian Tribe and the Cowlitz Tribal Gaming Authority. ilani Casino Resort is located approximately 16 miles north of Portland with direct access to Interstate 5. Resorts Casino Hotel We manage Resorts Casino Hotel and own 10% of the casino's holding company and its subsidiaries, including those conducting or licensing iGaming and retail sports wagering in the state of New Jersey. Resorts Casino Hotel, the first casino hotel in Atlantic City, New Jersey, opened in 1978, becoming the first legal casino outside of the state of Nevada. Resorts Casino Hotel is one of nine casinos operating in Atlantic City and competes primarily with resorts and casinos in Atlantic City, New Jersey, Pennsylvania and New York. Impact of the COVID-19 Pandemic In March 2020, the World Health Organization declared the outbreak of COVID-19 a global pandemic and the United States federal government declared it a national emergency. The spread of COVID-19 has affected most segments of the global economy, including our operations. In March 2020, we temporarily suspended operations at our properties in the United States and Canada to ensure the health and safety of our employees, customers and the surrounding communities in which we operate, consistent with directives from various governmental bodies. All of our properties in the United States were reopened by July 2020. Our properties in Canada reopened in July 2021, but were temporarily closed again from January 5, 2022 through January 30, 2022, due to a resurgence of COVID-19 at that time. While we are operating at full capacity as of the filing of this Annual Report on Form 10-K, COVID-19 has had a significant impact on our operations, the full extent of which depends on future developments which are highly uncertain and cannot be predicted with confidence. Such developments include the following: •the duration of COVID-19 or the extent of any resurgence or variants of COVID-19 in areas where we operate or where our customers are located; •the manner in which our customers, suppliers and other third parties respond to COVID-19, including the perception of safety and health measures we implemented; •new information that may emerge concerning the severity of COVID-19 and the actions to contain or treat it; •general, local or national economic conditions; and •consumer confidence. Accordingly, we cannot reasonably estimate the extent to which COVID-19 will further impact our future financial condition, results of operations and cash flows. We could experience other potential adverse impacts as a result of COVID-19, including, but not limited to, charges from further adjustments to the carrying value of our intangible assets, as well as other long-lived asset impairment charges. Actual results may differ materially from our current estimates as the scope of COVID-19 evolves, depending largely, but not exclusively, on the duration and extent of any business disruptions.