Organization	9 Months Ended
Sep. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization	NOTE 1 — ORGANIZATION Organization. MGM Resorts International (together with its consolidated subsidiaries, unless otherwise indicated or unless the context requires otherwise, the “Company”) is a Delaware corporation that acts largely as a holding company and, through subsidiaries, owns and operates casino resorts. The Company owns and operates the following integrated casino, hotel and entertainment resorts in Las Vegas, Nevada: Bellagio, MGM Grand Las Vegas, The Mirage, Mandalay Bay, Luxor, New York-New York, Park MGM (which was branded as Monte Carlo prior to May 2018), Excalibur and Circus Circus Las Vegas. Operations at MGM Grand Las Vegas include management of The Signature at MGM Grand Las Vegas, a condominium-hotel consisting of three towers. The Company operates and, along with local investors, owns MGM Grand Detroit in Detroit, Michigan, MGM National Harbor in Prince George’s County, Maryland, and MGM Springfield in Springfield, Massachusetts, which opened on August 24, 2018. The Company also owns and operates Borgata located on Renaissance Pointe in the Marina area of Atlantic City, New Jersey, and the following resorts in Mississippi: Beau Rivage in Biloxi and Gold Strike in Tunica. The Company owns and operates The Park, a dining and entertainment district located between New York-New York and Park MGM, Shadow Creek, an exclusive world-class golf course located approximately ten miles north of its Las Vegas Strip resorts, Primm Valley Golf Club at the California/Nevada state line and Fallen Oak golf course in Saucier, Mississippi. MGM Growth Properties LLC (“MGP”), a consolidated subsidiary of the Company, is organized as an umbrella partnership REIT (commonly referred to as an UPREIT) structure in which substantially all of its assets are owned by and substantially all of its businesses are conducted through MGM Growth Properties Operating Partnership LP (the “Operating Partnership”), its subsidiary. MGP has two classes of authorized and outstanding voting common shares (collectively, the “shares”): Class A shares and a single Class B share. The Company owns MGP’s Class B share, which does not provide its holder any rights to profits or losses or any rights to receive distributions from operations of MGP or upon liquidation or winding up of MGP. MGP’s Class A shareholders are entitled to one vote per share, while the Company, as the owner of the Class B share, is entitled to an amount of votes representing a majority of the total voting power of MGP’s shares so long as the Company and its controlled affiliates’ (excluding MGP) aggregate beneficial ownership of the combined economic interests in MGP and the Operating Partnership does not fall below 30%. The Company and MGP each hold Operating Partnership units representing limited partner interests in the Operating Partnership. The general partner of the Operating Partnership is a wholly-owned subsidiary of MGP. The Operating Partnership units held by the Company are exchangeable into Class A shares of MGP on a one-to-one basis, or cash at the fair value of a Class A share. The determination of settlement method is at the option of MGP’s independent conflicts committee. As of September 30, 2018, the Company owned 73.3% of the Operating Partnership units and MGP held the remaining 26.7% of the Operating Partnership units. Pursuant to a master lease agreement between a subsidiary of the Company (the “tenant”) and a subsidiary of the Operating Partnership (the “landlord”), the tenant leases the real estate assets of The Mirage, Mandalay Bay, Luxor, New York-New York, Park MGM, Excalibur, The Park, Gold Strike Tunica, MGM Grand Detroit, Beau Rivage, Borgata, and MGM National Harbor from the landlord. On July 6, 2018, MGP completed its previously announced acquisition of the membership interests of Northfield Park Associates, LLC (“Northfield”), an Ohio limited liability company that owns the real estate assets and operations of the Hard Rock Rocksino Northfield Park from Milstein Entertainment LLC. Simultaneously with the close of the transaction, MGP entered into a new agreement with an affiliate of Hard Rock Café International (STP), Inc. to continue to serve as the manager of the property. Refer to Note 3 for additional information. On September 18, 2018, the Company entered into an agreement with MGP to acquire all of the operating assets of Northfield from MGP. Northfield will be added to the existing master lease between the Company and MGP. The transaction is expected to close in the first half of 2019, subject to customary closing conditions and regulatory approvals. Refer to Note 3 for additional information. On May 28, 2018, the Company entered into an agreement to acquire the real property and operations associated with the Empire City Casino's race track and casino ("Empire City"). The Company also entered into a definitive agreement with MGP whereby MGP will acquire the developed real property associated with Empire City from the Company. The transactions are expected to close in the first quarter of 2019, subject to regulatory approvals and other customary closing conditions. Refer to Note 3 for additional information. The Company has an approximate 56% controlling interest in MGM China, which owns MGM Grand Paradise, S.A. (“MGM Grand Paradise”). MGM Grand Paradise owns and operates the MGM Macau resort and casino and the related gaming subconcession and land concessions as well as MGM Cotai, an integrated casino, hotel and entertainment resort located on the Cotai Strip in Macau that opened on February 13, 2018. The Company owns 50% of and manages CityCenter Holdings, LLC (“CityCenter”), located between Bellagio and Park MGM. The other 50% of CityCenter is owned by Infinity World Development Corp, a wholly owned subsidiary of Dubai World, a Dubai, United Arab Emirates government decree entity. CityCenter consists of Aria, an integrated casino, hotel and entertainment resort; and Vdara, a luxury condominium-hotel. On August 30, 2018, a subsidiary of CityCenter completed the previously announced sale of the Mandarin Oriental Las Vegas and adjacent retail parcels. See Note 4 for additional information related to CityCenter. The Company and a subsidiary of Anschutz Entertainment Group, Inc. (“AEG”) each own 42.5% of the Las Vegas Arena Company, LLC (“Las Vegas Arena Company”), the entity which owns the T-Mobile Arena, and Athena Arena, LLC owns the remaining 15%. The Company manages the T-Mobile Arena, which is located on a parcel of the Company’s land between Frank Sinatra Drive and New York-New York, adjacent to the Las Vegas Strip. The T-Mobile Arena is a 20,000 seat venue designed to host world-class events – from mixed martial arts, boxing, basketball and bull riding, to high profile awards shows and top-name concerts, and is the home of the Vegas Golden Knights of the National Hockey League. Additionally, the Company leases the MGM Grand Garden Arena, located adjacent to the MGM Grand Las Vegas, to the Las Vegas Arena Company. See Note 4 for additional information regarding the Company’s investment in the Las Vegas Arena Company. On August 7, 2018, the Company, along with its joint venture partner, completed the previously announced sale of its 50% interest in Grand Victoria, a riverboat casino in Elgin, Illinois. See Note 4 for additional information regarding the Company’s investment in Grand Victoria. The Company has two reportable segments: domestic resorts and MGM China. See Note 10 for additional information about the Company’s segments.

NOTE 1 — ORGANIZATION

Organization. MGM Resorts International (together with its consolidated subsidiaries, unless otherwise indicated or unless the context requires otherwise, the “Company”) is a Delaware corporation that acts largely as a holding company and, through subsidiaries, owns and operates casino resorts.

The Company owns and operates the following integrated casino, hotel and entertainment resorts in Las Vegas, Nevada: Bellagio, MGM Grand Las Vegas, The Mirage, Mandalay Bay, Luxor, New York-New York, Park MGM (which was branded as Monte Carlo prior to May 2018), Excalibur and Circus Circus Las Vegas. Operations at MGM Grand Las Vegas include management of The Signature at MGM Grand Las Vegas, a condominium-hotel consisting of three towers. The Company operates and, along with local investors, owns MGM Grand Detroit in Detroit, Michigan, MGM National Harbor in Prince George’s County, Maryland, and MGM Springfield in Springfield, Massachusetts, which opened on August 24, 2018. The Company also owns and operates Borgata located on Renaissance Pointe in the Marina area of Atlantic City, New Jersey, and the following resorts in Mississippi: Beau Rivage in Biloxi and Gold Strike in Tunica. The Company owns and operates The Park, a dining and entertainment district located between New York-New York and Park MGM, Shadow Creek, an exclusive world-class golf course located approximately ten miles north of its Las Vegas Strip resorts, Primm Valley Golf Club at the California/Nevada state line and Fallen Oak golf course in Saucier, Mississippi.

MGM Growth Properties LLC (“MGP”), a consolidated subsidiary of the Company, is organized as an umbrella partnership REIT (commonly referred to as an UPREIT) structure in which substantially all of its assets are owned by and substantially all of its businesses are conducted through MGM Growth Properties Operating Partnership LP (the “Operating Partnership”), its subsidiary. MGP has two classes of authorized and outstanding voting common shares (collectively, the “shares”): Class A shares and a single Class B share. The Company owns MGP’s Class B share, which does not provide its holder any rights to profits or losses or any rights to receive distributions from operations of MGP or upon liquidation or winding up of MGP. MGP’s Class A shareholders are entitled to one vote per share, while the Company, as the owner of the Class B share, is entitled to an amount of votes representing a majority of the total voting power of MGP’s shares so long as the Company and its controlled affiliates’ (excluding MGP) aggregate beneficial ownership of the combined economic interests in MGP and the Operating Partnership does not fall below 30%. The Company and MGP each hold Operating Partnership units representing limited partner interests in the Operating Partnership. The general partner of the Operating Partnership is a wholly-owned subsidiary of MGP. The Operating Partnership units held by the Company are exchangeable into Class A shares of MGP on a one-to-one basis, or cash at the fair value of a Class A share. The determination of settlement method is at the option of MGP’s independent conflicts committee. As of September 30, 2018, the Company owned 73.3% of the Operating Partnership units and MGP held the remaining 26.7% of the Operating Partnership units.

Pursuant to a master lease agreement between a subsidiary of the Company (the “tenant”) and a subsidiary of the Operating Partnership (the “landlord”), the tenant leases the real estate assets of The Mirage, Mandalay Bay, Luxor, New York-New York, Park MGM, Excalibur, The Park, Gold Strike Tunica, MGM Grand Detroit, Beau Rivage, Borgata, and MGM National Harbor from the landlord.

On July 6, 2018, MGP completed its previously announced acquisition of the membership interests of Northfield Park Associates, LLC (“Northfield”), an Ohio limited liability company that owns the real estate assets and operations of the Hard Rock Rocksino Northfield Park from Milstein Entertainment LLC. Simultaneously with the close of the transaction, MGP entered into a new agreement with an affiliate of Hard Rock Café International (STP), Inc. to continue to serve as the manager of the property. Refer to Note 3 for additional information.

On September 18, 2018, the Company entered into an agreement with MGP to acquire all of the operating assets of Northfield from MGP. Northfield will be added to the existing master lease between the Company and MGP. The transaction is expected to close in the first half of 2019, subject to customary closing conditions and regulatory approvals. Refer to Note 3 for additional information.

On May 28, 2018, the Company entered into an agreement to acquire the real property and operations associated with the Empire City Casino's race track and casino ("Empire City"). The Company also entered into a definitive agreement with MGP whereby MGP will acquire the developed real property associated with Empire City from the Company. The transactions are expected to close in the first quarter of 2019, subject to regulatory approvals and other customary closing conditions. Refer to Note 3 for additional information.

The Company has an approximate 56% controlling interest in MGM China, which owns MGM Grand Paradise, S.A. (“MGM Grand Paradise”). MGM Grand Paradise owns and operates the MGM Macau resort and casino and the related gaming subconcession and land concessions as well as MGM Cotai, an integrated casino, hotel and entertainment resort located on the Cotai Strip in Macau that opened on February 13, 2018.

The Company owns 50% of and manages CityCenter Holdings, LLC (“CityCenter”), located between Bellagio and Park MGM. The other 50% of CityCenter is owned by Infinity World Development Corp, a wholly owned subsidiary of Dubai World, a Dubai, United Arab Emirates government decree entity. CityCenter consists of Aria, an integrated casino, hotel and entertainment resort; and Vdara, a luxury condominium-hotel. On August 30, 2018, a subsidiary of CityCenter completed the previously announced sale of the Mandarin Oriental Las Vegas and adjacent retail parcels. See Note 4 for additional information related to CityCenter.

The Company and a subsidiary of Anschutz Entertainment Group, Inc. (“AEG”) each own 42.5% of the Las Vegas Arena Company, LLC (“Las Vegas Arena Company”), the entity which owns the T-Mobile Arena, and Athena Arena, LLC owns the remaining 15%. The Company manages the T-Mobile Arena, which is located on a parcel of the Company’s land between Frank Sinatra Drive and New York-New York, adjacent to the Las Vegas Strip. The T-Mobile Arena is a 20,000 seat venue designed to host world-class events – from mixed martial arts, boxing, basketball and bull riding, to high profile awards shows and top-name concerts, and is the home of the Vegas Golden Knights of the National Hockey League. Additionally, the Company leases the MGM Grand Garden Arena, located adjacent to the MGM Grand Las Vegas, to the Las Vegas Arena Company. See Note 4 for additional information regarding the Company’s investment in the Las Vegas Arena Company.

On August 7, 2018, the Company, along with its joint venture partner, completed the previously announced sale of its 50% interest in Grand Victoria, a riverboat casino in Elgin, Illinois. See Note 4 for additional information regarding the Company’s investment in Grand Victoria.

The Company has two reportable segments: domestic resorts and MGM China. See Note 10 for additional information about the Company’s segments.