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ACQUISITIONS AND DIVESTITURES - Additional Information (Details) $ / shares in Units, $ in Thousands								1 Months Ended			3 Months Ended		4 Months Ended		7 Months Ended	12 Months Ended
	Aug. 31, 2023 USD ($)	Feb. 15, 2023 USD ($)	Dec. 19, 2022 USD ($)	May 17, 2022 USD ($)	Apr. 29, 2022 USD ($) shares	Sep. 28, 2021 USD ($)	Sep. 27, 2021 USD ($)	Feb. 28, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 22, 2022 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2022 USD ($)	Sep. 06, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 07, 2022	May 02, 2022 kr / shares	Apr. 28, 2022	Jul. 30, 2021 $ / shares
Business Acquisition [Line Items]
Goodwill									$ 5,029,312			$ 3,480,997	$ 5,029,312		$ 5,029,312	$ 5,165,694	$ 5,029,312	$ 3,480,997
Cash consideration for acquisition																122,058	1,889,118	1,789,604
Gain on consolidation of CityCenter, net																0	0	1,562,329
Gain (loss) on sale of real estate assets																0	2,277,747	0
Noncontrolling interests									378,594				378,594		378,594	522,975	378,594
Proceeds from sale of operating resorts																$ 460,392	$ 1,054,313	$ 0
MGM Growth Properties Operating Partnership LP
Business Acquisition [Line Items]
Ownership interest by noncontrolling owner																					41.50%
MGM Growth Properties Operating Partnership LP | MGM Growth Properties LLC
Business Acquisition [Line Items]
Ownership interest by parent																					58.50%
MGP BREIT Venture | Subsidiary of MGP OP
Business Acquisition [Line Items]
Ownership interest by parent																					50.10%
Discontinued Operations, Disposed of by Sale | The Mirage
Business Acquisition [Line Items]
Decrease in annual rent payment									$ 90,000
Discontinued Operations, Disposed of by Sale | VICI Transaction
Business Acquisition [Line Items]
Gain (loss) on sale of real estate assets					$ 2,300,000
Consideration received from sale of real estate assets					4,800,000
Noncontrolling interests					3,200,000
Carrying value of assets and liabilities and comprehensive income					5,700,000
Disposal Group, Held-for-Sale, Not Discontinued Operations | Gold Strike Tunica
Business Acquisition [Line Items]
Decrease in annual rent payment								$ 40,000
Affiliated Entity | Discontinued Operations, Disposed of by Sale | The Mirage
Business Acquisition [Line Items]
Gain (loss) on sale of real estate assets			$ 1,100,000
Consideration received from sale of real estate assets			1,100,000
Carrying value of assets and liabilities and comprehensive income			28,000
Proceeds from sale of operating resorts			1,075,000
Decrease in annual rent payment			$ 90,000
V I C I Properties Inc
Business Acquisition [Line Items]
Cash tender price					$ 4,400,000
Stock issued during period, issued for services (in shares) | shares					1.366
Operating partnership units received (in shares) | shares					1.366
Operating partnership units received (in shares)					1.00%
Business combination retaining ownership interest					$ 375,000
CNE Gaming Holdings, LLC | Disposal Group, Held-for-Sale, Not Discontinued Operations | Gold Strike Tunica
Business Acquisition [Line Items]
Gain (loss) on sale of real estate assets		$ 399,000
Consideration received from sale of real estate assets		474,000
Carrying value of assets and liabilities and comprehensive income		75,000
Proceeds from sale of operating resorts		450,000
Decrease in annual rent payment		$ 40,000
LeoVegas
Business Acquisition [Line Items]
Ownership interest acquired (in percent)										2.00%									65.00%
Cash tender price										$ 370,000
Goodwill										$ 288,367
Shares tendered (in percent)																				1
Tender offer price (in krona per share) | kr / shares																				kr 61
Operating partnership equity interest (in percent)																			31.00%
Equity interests issued and issuable														$ 172,000
Remaining outstanding shares, fair value											$ 11,000
Ownership interest after transaction (in percent)										100.00%
Assets acquired and liabilities assumed										$ 556,000
Useful life (in years)																5 years
Acquiree net revenue													133,000
Acquiree operating income (loss)													(13,000)
Acquiree net income (loss)													$ (15,000)
LeoVegas | Technology
Business Acquisition [Line Items]
Amortizable intangible assets										$ 109,027
Cosmopolitan of Las Vegas
Business Acquisition [Line Items]
Ownership interest acquired (in percent)				100.00%
Cash tender price				$ 1,700,000
Goodwill				1,289,468
Assets acquired and liabilities assumed				1,690,486
Acquiree net revenue															783,000
Acquiree operating income (loss)															117,000
Acquiree net income (loss)															$ 117,000
Cash consideration for acquisition				$ 1,625,000
Cosmopolitan of Las Vegas | Customer lists
Business Acquisition [Line Items]
Useful life (in years)				7 years
CityCenter Holdings, LLC
Business Acquisition [Line Items]
Ownership interest acquired (in percent)							50.00%
Operating partnership equity interest (in percent)							50.00%
Ownership interest after transaction (in percent)							100.00%
Acquiree net revenue												367,000
Acquiree operating income (loss)												69,000
Acquiree net income (loss)												$ 68,000
Cash consideration for acquisition							$ 2,125,000
Business combination, step acquisition, equity interest in acquiree, fair value							4,250,000
Gain on consolidation of CityCenter, net							$ 1,600,000
CityCenter Holdings, LLC | Aria and Vdara | Affiliated Entity
Business Acquisition [Line Items]
Gain (loss) on sale of real estate assets						$ 3,890,000
VICI Transaction | V I C I Properties Inc
Business Acquisition [Line Items]
Business acquisition, share price | $ / shares																						$ 43
Push Gaming
Business Acquisition [Line Items]
Ownership interest acquired (in percent)	86.00%
Cash tender price	$ 145,000
Goodwill																$ 126,000
Amortizable intangible assets																$ 40,000

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