COMMITMENTS AND CONTINGENCIES	9 Months Ended
COMMITMENTS AND CONTINGENCIES	Sep. 30, 2023
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS AND CONTINGENCIES	COMMITMENTS AND CONTINGENCIES Cybersecurity litigation. In September 2023, through unauthorized access to certain of its U.S. systems, third-party criminal actors obtained, for some of the Company’s customers, personal information (including name, contact information (such as phone number, email address and postal address), gender, date of birth and driver’s license numbers). For a limited number of customers, Social Security numbers and passport numbers were also obtained by the criminal actors. The Company has been and continues to notify individuals impacted by this issue in accordance with federal and state law. In connection with this cybersecurity issue, the Company became subject to consumer class actions, to which it will respond in due course. However, the Company cannot predict the timing or outcome of any of these potential matters, or whether the Company may be subject to additional legal proceedings, claims, regulatory inquiries, investigations, or enforcement actions. While the Company believes it is reasonably possible that it may incur losses associated with the above-described proceedings, it is not possible to estimate the amount of loss or range of loss, if any, that might result from adverse judgments, settlements, or other resolution given the preliminary stage of these proceedings. The Company has incurred, and expects to continue to incur, certain expenses related to the cybersecurity issue, including expenses to respond to, remediate, and investigate this matter. The full scope of the costs and related impacts of this issue, including the extent to which all of the costs will be offset by cybersecurity insurance, has not been determined. Other litigation. The Company is a party to various other legal proceedings, most of which relate to routine matters incidental to its business. Management does not believe that the outcome of such proceedings will have a material adverse effect on the Company’s financial position, results of operations or cash flows. MGM China bank guarantees. In connection with the issuance of the gaming concession in January 2023, bank guarantees were provided to the government of Macau in the amount of MOP 1 billion (approximately $124 million as of September 30, 2023) to warrant the fulfillment of labor liabilities and of damages or losses that may result if there is noncompliance with the concession. The guarantees expire 180 days after the end of the concession term. As of December 31, 2022, MOP 1 billion (approximately $124 million as of December 31, 2022) of the bank guarantees were secured by pledged cash and, in connection with a release of MOP 300 million of such pledged cash during the nine months ended September 30, 2023, MOP 700 million of the bank guarantees (approximately $87 million as of September 30, 2023) were secured by pledged cash as of September 30, 2023. Shortfall guarantees. The Company provides shortfall guarantees of the $3.01 billion principal amount of indebtedness (and any interest accrued and unpaid thereon) of Bellagio BREIT Venture, the landlord of Bellagio, which matures in 2029 and of the $3.0 billion principal amount of indebtedness (and any interest accrued and unpaid thereon) of the landlords of Mandalay Bay and MGM Grand Las Vegas, which matures in 2032 and has an anticipated repayment date of March 2030. The terms of the shortfall guarantees provide that after the lenders have exhausted certain remedies to collect on the obligations under the indebtedness, the Company would then be responsible for any shortfall between the value of the collateral, which is the real estate assets of the applicable property owned by the landlord, and the debt obligation. The guarantees are accounted for under ASC 460 at fair value; such value is immaterial. MGM/Osaka IR KK guarantees. The Company provides for guarantees to the government of Osaka (1) in the amount of 12.65 billion yen (approximately $85 million as of September 30, 2023) for 50% of Osaka IR KK’s obligations to Osaka under various agreements related to the development of an integrated resort in Osaka, Japan by Osaka IR KK and (2) of an uncapped amount to provide funding to Osaka IR KK, if necessary, for the completion of the construction and full opening of the integrated resort. The guarantees expire when the obligations relating to the full opening of the integrated resort are fulfilled. The guarantees are accounted for under ASC 460 at fair value; such value is immaterial. MGM/Osaka IR KK funding commitment. The Company has commitments to fund Osaka IR KK for its proportionate share of the unfinanced portion of Osaka IR KK’s development project, for which the total development cost is currently committed to be 1.27 trillion yen (approximately $8.5 billion as of September 30, 2023). The amount and timing of funding may vary based upon the progress and scope of the development, the availability and amount of financing to be obtained by Osaka IR KK, and the timing and amount of noncontrolling interest participation.