MGM Resorts International (MGM) 10-Q 3 Nov 21 2021 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2021	Nov. 01, 2021
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	001-10362
Entity Registrant Name	MGM Resorts International
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	88-0215232
Entity Address, Address Line One	3600 Las Vegas Boulevard South
Entity Address, City or Town	Las Vegas
Entity Address, State or Province	NV
Entity Address, Postal Zip Code	89109
City Area Code	702
Local Phone Number	693-7120
Title of 12(b) Security	Common stock (Par Value $0.01)
Trading Symbol	MGM
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		468,959,843
Amendment Flag	false
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2021
Entity Central Index Key	0000789570
Current Fiscal Year End Date	--12-31

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 5,570,833	$ 5,101,637
Accounts receivable, net	532,298	316,502
Inventories	94,198	88,323
Income tax receivable	199,010	243,415
Prepaid expenses and other	273,982	200,782
Total current assets	6,670,321	5,950,659
Property and equipment, net	14,528,041	14,632,091
Other assets
Investments in and advances to unconsolidated affiliates	941,145	1,447,043
Goodwill	3,484,966	2,091,278
Other intangible assets, net	3,669,107	3,643,748
Operating lease right-of-use assets, net	11,551,415	8,286,694
Other long-term assets, net	493,328	443,421
Total other assets	20,139,961	15,912,184
Total assets	41,338,323	36,494,934
Current liabilities
Accounts payable	273,447	142,523
Construction payable	27,921	30,149
Current portion of long-term debt	1,000,000	0
Accrued interest on long-term debt	185,502	138,832
Other accrued liabilities	1,923,590	1,545,079
Total current liabilities	3,410,460	1,856,583
Deferred income taxes, net	2,389,277	2,153,016
Long-term debt, net	11,618,913	12,376,684
Operating lease liabilities	11,775,109	8,390,117
Other long-term obligations	362,823	472,084
Commitments and contingencies (Note 9)
Redeemable noncontrolling interests	120,764	66,542
Stockholders' equity
Common stock, $.01 par value: authorized 1,000,000,000 shares, issued and outstanding 469,728,258 and 494,317,865 shares	4,697	4,943
Capital in excess of par value	2,639,804	3,439,453
Retained earnings	4,210,726	3,091,007
Accumulated other comprehensive loss	(25,273)	(30,677)
Total MGM Resorts International stockholders' equity	6,829,954	6,504,726
Noncontrolling interests	4,831,023	4,675,182
Total stockholders' equity	11,660,977	11,179,908
Total liabilities and stockholders' equity	$ 41,338,323	$ 36,494,934

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2021	Dec. 31, 2020
Statement of Financial Position [Abstract]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	469,728,258	494,317,865
Common stock, shares outstanding (in shares)	469,728,258	494,317,865

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenues
Total revenue	$ 2,707,539	$ 1,125,920	$ 6,623,248	$ 3,668,546
Expenses
General and administrative	623,275	543,293	1,759,891	1,591,163
Corporate expense	112,114	70,437	287,021	356,823
Preopening and start-up expenses	1,547	11	1,642	51
Property transactions, net	3,677	4,116	842	85,440
Gain on REIT transactions, net	0	0	0	(1,491,945)
Gain on consolidation of CityCenter, net	(1,562,329)	0	(1,562,329)	0
Depreciation and amortization	279,403	294,363	853,579	911,859
Total expenses	849,868	1,641,737	4,806,266	3,995,442
Income from unconsolidated affiliates	35,111	20,635	92,870	48,030
Operating income (loss)	1,892,782	(495,182)	1,909,852	(278,866)
Non-operating income (expense)
Interest expense, net of amounts capitalized	(200,049)	(173,808)	(598,116)	(487,701)
Non-operating items from unconsolidated affiliates	(23,421)	(23,604)	(67,473)	(79,986)
Other, net	(49,241)	13,889	70,302	(102,054)
Non-operating income (expense)	(272,711)	(183,523)	(595,287)	(669,741)
Income (loss) before income taxes	1,620,071	(678,705)	1,314,565	(948,607)
Benefit (provision) for income taxes	(282,135)	76,734	(222,263)	84,668
Net income (loss)	1,337,936	(601,971)	1,092,302	(863,939)
Less: Net loss attributable to noncontrolling interests	12,497	67,240	31,055	278,820
Net income (loss) attributable to MGM Resorts International	$ 1,350,433	$ (534,731)	$ 1,123,357	$ (585,119)
Earnings (loss) per share
Basic (in dollars per share)	$ 2.81	$ (1.08)	$ 2.19	$ (1.10)
Diluted (in dollars per share)	$ 2.77	$ (1.08)	$ 2.17	$ (1.10)
Weighted average common shares outstanding
Basic (in shares)	478,405	493,517	487,509	494,126
Diluted (in shares)	484,215	493,517	493,184	494,126
Casino
Revenues
Total revenue	$ 1,400,337	$ 690,218	$ 3,835,094	$ 1,907,893
Expenses
Cost of revenues	640,041	368,310	1,808,849	1,197,373
Rooms
Revenues
Total revenue	490,460	175,450	1,053,907	641,024
Expenses
Cost of revenues	160,864	107,361	402,364	321,221
Food and beverage
Revenues
Total revenue	416,478	126,317	876,556	552,797
Expenses
Cost of revenues	301,963	133,937	651,349	533,879
Entertainment, retail and other
Revenues
Total revenue	315,693	101,618	639,926	420,132
Expenses
Cost of revenues	204,742	87,592	385,293	342,878
Reimbursed costs
Revenues
Total revenue	84,571	32,317	217,765	146,700
Expenses
Cost of revenues	$ 84,571	$ 32,317	$ 217,765	$ 146,700

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 1,337,936	$ (601,971)	$ 1,092,302	$ (863,939)
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustment	(11,956)	538	(19,167)	29,163
Unrealized gain (loss) on cash flow hedges	7,241	(448)	24,629	(90,648)
Other comprehensive income (loss)	(4,715)	90	5,462	(61,485)
Comprehensive income (loss)	1,333,221	(601,881)	1,097,764	(925,424)
Less: Comprehensive loss attributable to noncontrolling interests	13,111	66,810	24,903	306,236
Comprehensive income (loss) attributable to MGM Resorts International	$ 1,346,332	$ (535,071)	$ 1,122,667	$ (619,188)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities
Net income (loss)	$ 1,092,302	$ (863,939)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	853,579	911,859
Amortization of debt discounts, premiums and issuance costs	30,136	24,918
Loss on early retirement of debt	37	126,462
Provision for credit losses	5,815	76,228
Stock-based compensation	38,688	77,681
Property transactions, net	842	85,440
Gain on REIT transaction, net	0	(1,491,945)
Gain on consolidation of CityCenter, net	(1,562,329)	0
Noncash lease expense	131,586	139,914
Other investment gains	(38,572)	0
Loss (income) from unconsolidated affiliates	(25,397)	31,956
Distributions from unconsolidated affiliates	74,418	62,399
Deferred income taxes	153,464	49,633
Change in operating assets and liabilities:
Accounts receivable	(167,622)	192,393
Inventories	5,310	5,692
Income taxes receivable and payable, net	44,406	(143,213)
Prepaid expenses and other	(52,155)	(44,895)
Accounts payable and accrued liabilities	382,122	(450,378)
Other	(79,925)	(39,810)
Net cash provided by (used in) operating activities	886,705	(1,249,605)
Cash flows from investing activities
Capital expenditures, net of construction payable	(322,139)	(177,571)
Dispositions of property and equipment	10,191	433
Proceeds from sale of investments in unconsolidated affiliates	32,400	0
Proceeds from sale of Aria and Vdara real estate assets	3,888,431	0
Acquisition of CityCenter, net of cash acquired	(1,789,604)	0
Proceeds from Mandalay Bay and MGM Grand Las Vegas transaction	0	2,455,839
Investments in unconsolidated affiliates	(151,845)	(71,110)
Distributions from unconsolidated affiliates	9,245	63,578
Other	342	385
Net cash provided by investing activities	1,677,021	2,271,554
Cash flows from financing activities
Net repayments under bank credit facilities – maturities of 90 days or less	(2,242,487)	(1,071,180)
Issuance of long-term debt	749,775	2,050,000
Retirement of senior notes	0	(846,815)
Debt issuance costs	(11,358)	(42,030)
Proceeds from issuance of bridge loan facility	0	1,304,625
Issuance of MGM Growth Properties Class A shares, net	792,851	524,704
Dividends paid to common shareholders	(3,638)	(76,370)
Distributions to noncontrolling interest owners	(239,514)	(219,775)
Purchases of common stock	(1,026,194)	(353,720)
Other	(112,862)	(29,601)
Net cash provided by (used in) financing activities	(2,093,427)	1,239,838
Effect of exchange rate on cash	(1,103)	2,481
Cash and cash equivalents
Net increase for the period	469,196	2,264,268
Balance, beginning of period	5,101,637	2,329,604
Balance, end of period	5,570,833	4,593,872
Supplemental cash flow disclosures
Interest paid, net of amounts capitalized	508,056	428,520
Federal, state and foreign income taxes paid, net	34,836	8,595
Non-cash investing and financing activities
Investment in MGP BREIT Venture	0	802,000
MGP BREIT Venture assumption of bridge loan facility	$ 0	$ 1,304,625

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	MGP BREIT Venture	MGM Growth Properties LLCClass A Shareholders	Common Stock	Capital in Excess of Par Value	Capital in Excess of Par ValueMGP BREIT Venture	Capital in Excess of Par ValueMGM Growth Properties LLCClass A Shareholders	Retained Earnings	Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive LossMGP BREIT Venture	Accumulated Other Comprehensive LossMGM Growth Properties LLCClass A Shareholders	Total MGM Resorts International Stockholders' Equity	Total MGM Resorts International Stockholders' EquityMGP BREIT Venture	Total MGM Resorts International Stockholders' EquityMGM Growth Properties LLCClass A Shareholders	Non- Controlling Interests	Non- Controlling InterestsMGP BREIT Venture	Non- Controlling InterestsMGM Growth Properties LLCClass A Shareholders
Beginning Balance (in shares) at Dec. 31, 2019				503,148
Beginning Balance at Dec. 31, 2019	$ 12,662,919			$ 5,031	$ 3,531,099			$ 4,201,337	$ (10,202)			$ 7,727,265			$ 4,935,654
Net income (loss)	(868,093)							(585,119)				(585,119)			(282,974)
Currency translation adjustment	29,163								16,353			16,353			12,810
Cash flow hedges	(90,648)								(50,422)			(50,422)			(40,226)
Stock-based compensation	77,681				73,062							73,062			4,619
Issuance of common stock pursuant to stock-based compensation awards (in shares)				1,020
Issuance of common stock pursuant to stock-based compensation awards	(7,129)			$ 11	(7,140)							(7,129)
Distributions and dividends to non-controlling interests	(155,081)		$ (64,085)												(155,081)		$ (64,085)
Dividends declared and paid to common shareholders	(76,370)							(76,370)				(76,370)
Issuance of restricted stock units	2,142				2,142							2,142
Repurchases of common stock (in shares)				(10,861)
Repurchases of common stock	(353,720)			$ (109)	(353,611)							(353,720)
Adjustment of redeemable noncontrolling interest to redemption value	42,029				42,029							42,029
MGP Class A share issuances			507,551				$ 64,188				$ 646			$ 64,834			442,717
MGP BREIT Venture transaction		$ 1,725				$ (6,503)				$ (59)			$ (6,562)			$ 8,287
Redemption of Operating Partnership units	(3,205)				12,055				4,772			16,827			(20,032)
Other	(2,217)				(1,628)				(458)			(2,086)			(131)
Ending Balance (in shares) at Sep. 30, 2020				493,307
Ending Balance at Sep. 30, 2020	11,702,662			$ 4,933	3,355,693			3,539,848	(39,370)			6,861,104			4,841,558
Beginning Balance (in shares) at Jun. 30, 2020				493,281
Beginning Balance at Jun. 30, 2020	12,348,782			$ 4,933	3,333,074			4,075,812	(39,030)			7,374,789			4,973,993
Net income (loss)	(604,154)							(534,731)				(534,731)			(69,423)
Currency translation adjustment	538								424			424			114
Cash flow hedges	(448)								(764)			(764)			316
Stock-based compensation	21,948				19,739							19,739			2,209
Issuance of common stock pursuant to stock-based compensation awards (in shares)				26
Issuance of common stock pursuant to stock-based compensation awards	(129)				(129)							(129)
Distributions and dividends to non-controlling interests	(1,044)		(64,085)												(1,044)		(64,085)
Dividends declared and paid to common shareholders	(1,233)							(1,233)				(1,233)
Adjustment of redeemable noncontrolling interest to redemption value	3,009				3,009							3,009
Other	(522)														(522)
Ending Balance (in shares) at Sep. 30, 2020				493,307
Ending Balance at Sep. 30, 2020	11,702,662			$ 4,933	3,355,693			3,539,848	(39,370)			6,861,104			4,841,558
Beginning Balance (in shares) at Dec. 31, 2020				494,318
Beginning Balance at Dec. 31, 2020	11,179,908			$ 4,943	3,439,453			3,091,007	(30,677)			6,504,726			4,675,182
Net income (loss)	1,084,993							1,123,357				1,123,357			(38,364)
Currency translation adjustment	(19,167)								(10,806)			(10,806)			(8,361)
Cash flow hedges	24,629								10,116			10,116			14,513
Stock-based compensation	38,688				35,271							35,271			3,417
Issuance of common stock pursuant to stock-based compensation awards (in shares)				1,352
Issuance of common stock pursuant to stock-based compensation awards	(17,882)			$ 13	(17,895)							(17,882)
Distributions and dividends to non-controlling interests	(166,236)		(81,459)												(166,236)		(81,459)
Dividends declared and paid to common shareholders	(3,638)							(3,638)				(3,638)
Repurchases of common stock (in shares)				(25,942)
Repurchases of common stock	(1,026,194)			$ (259)	(1,025,935)							(1,026,194)
Adjustment of redeemable noncontrolling interest to redemption value	(54,019)				(54,019)							(54,019)
MGP Class A share issuances			759,535				99,934				3,240			103,174			656,361
Redemption of Operating Partnership units	(50,828)				171,332				5,327			176,659			(227,487)
Other	(7,353)				(8,337)				(2,473)			(10,810)			3,457
Ending Balance (in shares) at Sep. 30, 2021				469,728
Ending Balance at Sep. 30, 2021	11,660,977			$ 4,697	2,639,804			4,210,726	(25,273)			6,829,954			4,831,023
Beginning Balance (in shares) at Jun. 30, 2021				486,530
Beginning Balance at Jun. 30, 2021	11,104,122			$ 4,865	3,335,015			2,861,474	(21,173)			6,180,181			4,923,941
Net income (loss)	1,335,276							1,350,433	0			1,350,433			(15,157)
Currency translation adjustment	(11,956)								(6,686)			(6,686)			(5,270)
Cash flow hedges	7,241								2,585			2,585			4,656
Stock-based compensation	11,281				10,084				0			10,084			1,197
Issuance of common stock pursuant to stock-based compensation awards (in shares)				408
Issuance of common stock pursuant to stock-based compensation awards	(6,224)			$ 4	(6,228)							(6,224)
Distributions and dividends to non-controlling interests	(3,266)		(81,459)												(3,266)		(81,459)
Dividends declared and paid to common shareholders	(1,181)							(1,181)				(1,181)
Repurchases of common stock (in shares)				(17,210)
Repurchases of common stock	(686,533)			$ (172)	(686,361)							(686,533)
Adjustment of redeemable noncontrolling interest to redemption value	(7,580)				(7,580)							(7,580)
MGP Class A share issuances			$ 271				$ 40				$ 1			$ 41			$ 230
Other	985				(5,166)							(5,166)			6,151
Ending Balance (in shares) at Sep. 30, 2021				469,728
Ending Balance at Sep. 30, 2021	$ 11,660,977			$ 4,697	$ 2,639,804			$ 4,210,726	$ (25,273)			$ 6,829,954			$ 4,831,023

Consolidated Statements of St_2

Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Stockholders' Equity [Abstract]
Dividends declared and paid to common shareholders (in dollars per share)	$ 0.0025	$ 0.0025	$ 0.0075	$ 0.1550

Organization

Organization	9 Months Ended
	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	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 . As of September 30, 2021, the Company owns and operates the following integrated casino, hotel and entertainment resorts in Las Vegas, Nevada: Aria (including Vdara), Bellagio, MGM Grand Las Vegas (including The Signature), The Mirage, Mandalay Bay, Luxor, New York-New York, Park MGM, and Excalibur. The Company owns, along with local investors, and operates MGM Grand Detroit in Detroit, Michigan, MGM National Harbor in Prince George’s County, Maryland, and MGM Springfield in Springfield, Massachusetts. The Company also owns and operates Borgata located on Renaissance Pointe in the Marina area of Atlantic City, New Jersey, Empire City in Yonkers, New York, MGM Northfield Park in Northfield Park, Ohio, and the following resorts in Mississippi: Beau Rivage in Biloxi and Gold Strike in Tunica. Additionally, 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, 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”). 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 Market Value of a Class A share (as defined in the Operating Partnership’s partnership agreement). The determination of settlement method is at the option of MGP’s independent conflicts committee. As of September 30, 2021, the Company owned 41.6% of the Operating Partnership units, and MGP held the remaining 58.4% ownership interest in the Operating Partnership. Pursuant to a master lease agreement between a subsidiary of the Company and a subsidiary of the Operating Partnership, the Company leases the real estate assets of The Mirage, Luxor, New York-New York, Park MGM, Excalibur, The Park, Gold Strike Tunica, MGM Grand Detroit, Beau Rivage, Borgata, Empire City, MGM National Harbor, and MGM Northfield Park. Pursuant to a lease agreement between a subsidiary of the Company and a venture that is 5% owned by such subsidiary and 95% owned by a subsidiary of Blackstone Real Estate Income Trust, Inc. (“BREIT”, and such venture, the “Bellagio BREIT Venture”), the Company leases the real estate assets of Bellagio . Additionally, pursuant to a lease agreement between a subsidiary of the Company and a venture that is 50.1% owned by a subsidiary of the Operating Partnership and 49.9% by a subsidiary of BREIT (such venture, the “MGP BREIT Venture”), the Company leases the real estate assets of Mandalay Bay and MGM Grand Las Vegas. Refer to Note 8 for further discussion of the leases. On August 4, 2021, the Company entered into an agreement with VICI Properties, Inc. (“VICI”) and MGP whereby VICI will acquire MGP in a stock-for-stock transaction (such transaction, the “VICI Transaction”). Pursuant to the agreement, MGP Class A shareholders will receive 1.366 shares of newly issued VICI stock in exchange for each MGP Class A share outstanding and the Company will receive 1.366 units of the new VICI operating partnership (“VICI OP”) in exchange for each Operating Partnership unit held by the Company. The fixed exchange ratio represents an agreed upon price of $43 per share of MGP Class A share to the five-day volume weighted average price of VICI stock as of the close of business on July 30, 2021. In connection with the exchange, VICI OP will redeem the majority of the Company’s VICI OP units for cash consideration of $4.4 billion, with the Company retaining an approximate $370 million ownership interest in the VICI OP (based upon the close price of VICI stock as of August 3, 2021). MGP’s Class B share that is held by the Company will be cancelled. As part of the transaction, the Company will enter into an amended and restated master lease with VICI. The new master lease will have an initial term of 25 years, with three ten-year renewals, and initial annual rent of $860 million, escalating annually at a rate of 2.0% per annum for the first ten years and thereafter equal to the greater of 2% and the CPI increase during the prior year subject to a cap of 3%. The transaction is expected to close in the first half of 2022, subject to customary closing conditions, regulatory approvals, and approval by VICI stockholders (which was obtained on October 29, 2021). On September 27, 2021, the Company completed the acquisition of the 50% ownership interest in CityCenter Holdings, LLC ("CityCenter") held by Infinity World Development Corp ("Infinity World"), a wholly owned subsidiary of Dubai World, a Dubai, United Arab Emirates government decree entity. CityCenter is located between Bellagio and Park MGM and consists of Aria, an integrated casino, hotel and entertainment resort; and Vdara, a luxury condominium-hotel. Refer to Note 3 for additional information on this acquisition. On September 28, 2021, the Company sold the real estate assets of Aria and Vdara to an affiliate of Blackstone Group Inc. ("Blackstone") for cash consideration of $3.89 billion and entered into a lease through which the real property is leased back to a subsidiary of the Company, as further discussed in Note 8. On September 26, 2021, the Company entered into an agreement to acquire the operations of The Cosmopolitan of Las Vegas ("The Cosmopolitan") for cash consideration of $1.625 billion, subject to customary working capital adjustments. Additionally, the Company will enter into a lease agreement for the real estate assets of The Cosmopolitan. The Cosmopolitan lease will have an initial term of 30 years with three subsequent 10-year renewal periods, exercisable at the Company’s option. The initial term of the lease provides for an initial annual cash rent of $200 million with a fixed 2% escalator for the first fifteen years, and thereafter, an escalator equal to the greater of 2% and the CPI increase during the prior year, subject to a cap of 3%. Additionally, the lease will require the Company to spend a specified percentage of net revenues over a rolling five-year period at the property on capital expenditures and for the Company to comply with certain financial covenants, which, if not met, would require the Company to maintain cash security or a letter of credit in favor of the landlord in an amount equal to rent for the succeeding one-year period. The transaction is expected to close in the first half of 2022, subject to regulatory approvals and other customary closing conditions. On October 29, 2021, MGP acquired the real estate assets of MGM Springfield from the Company and MGM Springfield was added to the MGP master lease between the Company and MGP through which MGP leases back the real property to a subsidiary of the Company. Transactions with MGP, including transactions under the MGP master lease, have been eliminated in the Company’s consolidation of MGP. Refer to Note 13 for additional information. The Company has an approximate 56% controlling interest in MGM China Holdings Limited (together with its subsidiaries, “MGM China”), which owns MGM Grand Paradise, S.A. (“MGM Grand Paradise”). MGM Grand Paradise owns and operates the MGM Macau and MGM Cotai, two integrated casino, hotel and entertainment resorts in Macau, as well as the related gaming subconcession and land concessions . Gaming in Macau is currently administered by the Macau Government through concessions awarded to three different concessionaires and three subconcessionaires, of which a subsidiary of MGM China is a subconcessionaire. Pursuant to the Macau gaming law, upon reaching the maximum duration of twenty years, the term of the concessions may be extended one or more times by order of the Chief Executive, which period may not exceed, in total, five years. In 2019, the expiration of MGM China’s subconcession term was extended from March 31, 2020 to June 26, 2022, consistent with the expiration of the other concessionaires and subconcessionaires. On September 14, 2021, the Macau government released a consultation paper on the revision of the Macau gaming law and commenced a 45-day public consultation process soliciting feedback. Unless the subconcession is extended or replaced with a similar governmental license, or legislation with regard to reversion of casino premises is amended, the casino area premises and gaming-related equipment subject to reversion will automatically be transferred to the Macau Government upon expiration, and MGM China will cease to generate any revenues from such gaming operations. In addition, certain events relating to the loss, termination, rescission, revocation or modification of MGM China’s gaming subconcession in Macau, where such events have a material adverse effect on the financial condition, business, properties, or results of operations of MGM China, taken as a whole, may result in a special put option triggering event under MGM China’s senior notes and in an event of default under MGM China’s revolving credit facilities. MGM China continues to closely monitor developments regarding the gaming concessions retendering or extension including the issuance of guidance by the Macau Government. MGM China intends to respond proactively to all relevant Macau Government requirements when known relating to the gaming subconcession extension or retendering. The Company cannot provide any assurance that the gaming subconcession will be extended beyond the current term; however, management believes that the gaming subconcession will be extended or replaced with a similar governmental license. The Company owns 50% of BetMGM, LLC (“BetMGM”), which provides online sports betting and iGaming in certain jurisdictions in the United States. The other 50% of BetMGM is owned by Entain plc. The Company has three reportable segments: Las Vegas Strip Resorts, Regional Operations and MGM China. See Note 12 for additional information about the Company’s segments. Financial Impact of COVID-19. The spread of the novel 2019 coronavirus (“COVID-19”) and developments surrounding the global pandemic have had a significant impact on the Company’s business, financial condition, results of operations and cash flows in 2020 and 2021 and may potentially thereafter. In March 2020, all of the Company’s domestic properties were temporarily closed pursuant to state and local government restrictions imposed as a result of COVID-19. Throughout the second and third quarters of 2020, all of the Company’s properties that were temporarily closed re-opened to the public, but continued to operate without certain amenities and subject to certain occupancy limitations, with restrictions varying by jurisdiction and with further temporary re-closures and re-openings occurring for the Company’s properties or portions thereof into the first quarter of 2021. Upon re-opening of the properties, the Company implemented certain measures to mitigate the spread of COVID-19, including limitations on the number of gaming tables allowed to operate and on the number of seats at each table game, as well as slot machine spacing, temperature checks, mask protection, limitations on restaurant capacity, entertainment events and conventions as well as other measures to enforce social distancing. Beginning in the latter part of the first quarter of 2021 and continuing into the second quarter of 2021, the Company’s domestic jurisdictions eased and removed prior operating restrictions, including capacity and occupancy limits as well as social distancing policies. However, certain operations and amenities are limited or constrained due to available staffing and/or mid-week visitation levels, and in July 2021, certain jurisdictions reinstated mask protection guidelines as a result of the emergence and spread of certain COVID-19 variants. Although all of the Company’s properties have re-opened, in light of the unpredictable nature of the pandemic, including the emergence and spread of COVID-19 variants, the properties may be subject to temporary complete or partial shutdowns in the future. At this time, the Company cannot predict whether jurisdictions, states or the federal government will adopt similar or more restrictive measures in the future than in the past, including stay-at-home orders or the temporary closure of all or a portion of the Company’s properties. In Macau, following a temporary closure of the Company’s properties on February 5, 2020, operations resumed on February 20, 2020, subject to certain health safeguards, such as limiting the number of seats available at each table game, slot machine spacing, reduced operating hours at a number of restaurants and bars, temperature checks, and mask protection. Although the issuance of tourist visas (including the individual visit scheme) for residents of Zhuhai, Guangdong Province and all other provinces in mainland China to travel to Macau resumed on August 12, 2020, August 26, 2020 and September 23, 2020, respectively, several travel and entry restrictions in Macau, Hong Kong and mainland China remain in place (including the temporary suspension of ferry services from Hong Kong to Macau, a negative nucleic acid test result, and mandatory quarantine requirements for visitors from Hong Kong and Taiwan, and bans on entry or enhanced quarantine requirements on other visitors into Macau), which have significantly impacted visitation to the Company’s Macau properties. In recent months, local COVID-19 cases were identified in Macau. Upon such occurrences, a state of immediate prevention was declared and mass mandatory nucleic acid testing was imposed in Macau, the validity period of negative test results for re-entry into mainland China was shortened and quarantine requirements were imposed, certain events were cancelled or suspended, and in some instances certain entertainment and leisure facilities were closed throughout Macau. Although gaming and hotel operations have remained open during these states of immediate prevention, such measures have had a negative effect on the Company's operations and it is uncertain whether further closures, including the closure of the Company’s properties, or travel restrictions to Macau will be implemented if additional local COVID-19 cases are identified.

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES Basis of presentation . As permitted by the rules and regulations of the Securities and Exchange Commission (“SEC”), certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) have been condensed or omitted. These consolidated financial statements should be read in conjunction with the Company’s 2020 annual consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020. In the opinion of management, the accompanying unaudited consolidated financial statements contain all adjustments, which include only normal recurring adjustments, necessary to present fairly the Company’s interim financial statements. The results for such periods are not necessarily indicative of the results to be expected for the full year. Principles of consolidation . The Company evaluates entities for which control is achieved through means other than voting rights to determine if it is the primary beneficiary of a variable interest entity (“VIE”). A VIE is an entity in which either (i) the equity investors as a group, if any, lack the power through voting or similar rights to direct the activities of such entity that most significantly impact such entity’s economic performance or (ii) the equity investment at risk is insufficient to finance that entity’s activities without additional subordinated financial support. The Company identifies the primary beneficiary of a VIE as the enterprise that has both of the following characteristics: (i) the power to direct the activities of the VIE that most significantly impact the entity’s economic performance; and (ii) the obligation to absorb losses or receive benefits of the VIE that could potentially be significant to the entity. The Company consolidates its investment in a VIE when it determines that it is its primary beneficiary. For these VIEs, the Company records a noncontrolling interest in the consolidated balance sheets. The Company may change its original assessment of a VIE upon subsequent events such as the modification of contractual arrangements that affect the characteristics or adequacy of the entity’s equity investments at risk and the disposition of all or a portion of an interest held by the primary beneficiary. The Company performs this analysis on an ongoing basis. Management has determined that MGP is a VIE because the Class A equity investors as a group lack the power through voting or similar rights to direct the activities of such entity that most significantly impact such entity’s economic performance. The Company has determined that it is the primary beneficiary of MGP and consolidates MGP because (i) its ownership of MGP’s single Class B share entitles it to a majority of the total voting power of MGP’s shares, and (ii) the exchangeable nature of the Operating Partnership units owned provide the Company the right to receive benefits from MGP that could potentially be significant to MGP. The Company has recorded MGP’s ownership interest in the Operating Partnership as noncontrolling interest in the Company’s consolidated financial statements. As of September 30, 2021, on a consolidated basis MGP had total assets of $10.1 billion, primarily related to its real estate investments, and total liabilities of $5.0 billion, primarily related to its indebtedness. Management has determined that Bellagio BREIT Venture is a VIE because the equity holders as a group lack the power through voting or similar rights to direct the activities of such entity that most significantly impact such entity’s economic performance. The Company has determined that it is not the primary beneficiary of Bellagio BREIT Venture and, accordingly, does not consolidate the venture, because the Company does not have power to direct the activities that could potentially be significant to the venture; BREIT, as the managing member, has such power. The Company has recorded its 5% ownership interest in Bellagio BREIT Venture as an investment in unconsolidated affiliates in the Company’s consolidated financial statements, for which such amount was $58 million as of September 30, 2021. The Company’s maximum exposure to loss as a result of its involvement with Bellagio BREIT Venture is equal to the carrying value of its investment, assuming no future capital funding requirements, plus the exposure to loss resulting from the Company’s guarantee of the debt of Bellagio BREIT Venture, which guarantee is immaterial as of September 30, 2021, as further discussed in Note 9. For entities determined not to be a VIE, the Company consolidates such entities in which the Company owns 100% of the equity. For entities in which the Company owns less than 100% of the equity interest, the Company consolidates the entity under the voting interest model if it has a controlling financial interest based upon the terms of the respective entities’ ownership agreements, such as MGM China. For these entities, the Company records a noncontrolling interest in the consolidated balance sheets and all intercompany balances and transactions are eliminated in consolidation. If the entity does not qualify for consolidation under the voting interest model and the Company has significant influence over the operating and financial decisions of the entity, the Company accounts for the entity under the equity method, such as the Company’s investments in MGP BREIT Venture and BetMGM, which do not qualify for consolidation as the Company has joint control, given the entities are structured with substantive participating rights whereby both owners participate in the decision making process, which prevents the Company from exerting a controlling financial interest in such entities, as defined in ASC 810. For equity interests in entities in which the Company does not have significant influence, the Company records its equity investment under ASC 321 and reflects such investments within “Other long-term assets, net” on the consolidated balance sheets. During the three and nine months ended September 30, 2021, the Company recorded a loss of $48 million and a gain of $39 million, respectively, within “Other, net” on the Company’s consolidated statement of operations related primarily to the change in fair value of an equity instrument that previously qualified for the measurement alternative under ASC 321, which was discontinued upon the equity interest having a readily determinable fair value as a result of becoming exchange traded. The fair value of such equity investment was $76 million as of September 30, 2021. Reclassifications . Certain reclassifications have been made to conform the prior period presentation. Fair value measurements . Fair value measurements affect the Company’s accounting and impairment assessments of its long-lived assets, investments in unconsolidated affiliates or in equity interests, assets acquired, and liabilities assumed in an acquisition, and goodwill and other intangible assets. Fair value measurements also affect the Company’s accounting for certain of its financial assets and liabilities. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date and is measured according to a hierarchy that includes: Level 1 inputs, such as quoted prices in an active market; Level 2 inputs, which are observable inputs for similar assets; or Level 3 inputs, which are unobservable inputs. The Company used the following inputs in its fair value measurements: • Level 1 inputs when measuring its equity investments under ASC 321; • Level 1 and Level 2 inputs for its long-term debt fair value disclosures. See Note 6; • Level 2 inputs when measuring the Operating Partnership’s fair value of its interest rate swaps. See Note 6; and • Level 1, Level 2, and Level 3 inputs when assessing the fair value of assets acquired and liabilities assumed in the CityCenter acquisition. See Note 3. Revenue recognition . The Company’s revenue from contracts with customers consists of casino wagers transactions, hotel room sales, food and beverage transactions, entertainment shows, and retail transactions. For casino wager transactions that include incentives earned by customers under the Company’s loyalty programs, the Company allocates a portion of net win based upon the standalone selling price of such incentive (less estimated breakage). This allocation is deferred and recognized as revenue when the customer redeems the incentive. When redeemed, revenue is recognized in the department that provides the goods or service. Redemption of loyalty incentives at third party outlets are deducted from the loyalty liability and amounts owed are paid to the third party, with any discount received recorded as other revenue. After allocating revenue to other goods and services provided as part of casino wager transactions, the Company records the residual amount to casino revenue. Contract and Contract-Related Liabilities . There may be a difference between the timing of cash receipts from the customer and the recognition of revenue, resulting in a contract or contract-related liability. The Company generally has three types of liabilities related to contracts with customers: (1) outstanding chip liability, which represents the amounts owed in exchange for gaming chips held by a customer, (2) loyalty program obligations, which represents the deferred allocation of revenue relating to loyalty program incentives earned, as discussed above, and (3) customer advances and other, which is primarily funds deposited by customers before gaming play occurs (“casino front money”) and advance payments on goods and services yet to be provided such as advance ticket sales and deposits on rooms and convention space or for unpaid wagers. These liabilities are generally expected to be recognized as revenue within one year of being purchased, earned, or deposited and are recorded within “Other accrued liabilities” on the Company’s consolidated balance sheets. The following table summarizes the activity related to contract and contract-related liabilities: Outstanding Chip Liability Loyalty Program Customer Advances and Other 2021 2020 2021 2020 2021 2020 (In thousands) Balance at January 1 $ 212,671 $ 314,570 $ 139,756 $ 126,966 $ 382,287 $ 481,095 Balance at September 30 177,066 350,848 142,969 138,785 662,096 359,877 Increase / (decrease) $ (35,605) $ 36,278 $ 3,213 $ 11,819 $ 279,809 $ (121,218) Revenue by source. The Company presents the revenue earned disaggregated by the type or nature of the good or service (casino, room, food and beverage, and entertainment, retail and other) and by relevant geographic region within Note 12. Leases. Refer to Note 8 for discussion of leases under which the Company is a lessee. The Company is a lessor under certain other lease arrangements. Lease revenues earned by the Company from third parties are classified within the line item corresponding to the type or nature of the tenant’s good or service . During the three and nine months ended September 30, 2021, lease revenues from third-party tenants include $13 million and $29 million recorded within food and beverage revenue, respectively, and $22 million and $58 million recorded within entertainment, retail, and other revenue for the same such periods, respectively. During the three and nine months ended September 30, 2020, lease revenues from third-party tenants include $7 million and $21 million recorded within food and beverage revenue, respectively, and $14 million and $47 million recorded within entertainment, retail, and other revenue for the same such periods, respectively. Lease revenues from the rental of hotel rooms are recorded as rooms revenues within the consolidated statements of operations.

Acquisition

Acquisition	9 Months Ended
	Sep. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Acquisition	ACQUISITION On September 27, 2021, the Company completed the acquisition of Infinity World's 50% ownership interest in CityCenter for cash consideration of $2.125 billion. Through the acquisition, the Company obtained 100% of the equity interests in CityCenter and therefore consolidated CityCenter as of September 27, 2021. Prior to the acquisition, the Company held a 50% ownership interest, which was accounted for under the equity method. The fair value of the equity interests of CityCenter was determined by the transaction price and equaled $4.25 billion. The carrying value of the Company's equity method investment was less than its share of the fair value of CityCenter at the acquisition date, resulting in a net gain of $1.6 billion upon consolidation, which is recognized as "Gain on consolidation of CityCenter, net" on the consolidated statements of operations. On September 28, 2021, the Company sold the real estate assets of Aria and Vdara for cash consideration of $3.89 billion and entered into a lease agreement pursuant to which the Company leases back the real property. The Company classified the real estate assets as held for sale as of the acquisition date and accordingly measured the real estate assets at fair value less costs to sell, as reflected in the table below. See Note 8 for additional information regarding the lease. The Company recognized 100% of the assets and liabilities of CityCenter at fair value at the date of the acquisition. Under the acquisition method, the fair value was allocated to the assets acquired and liabilities assumed in the transaction. The Company estimated fair value using level 1 inputs, level 2 inputs, and level 3 inputs. As the transaction closed on September 27, 2021, the allocation of fair value for substantially all of the assets and liabilities is preliminary as of September 30, 2021, and may be adjusted up to one year after the acquisition. The following table sets forth the preliminary purchase price allocation (in thousands): Fair value of assets acquired and liabilities assumed: Cash and cash equivalents $ 335,396 Receivables and other current assets 106,417 Property and equipment - real estate assets held for sale 3,888,431 Property and equipment 320,826 Trademarks 180,000 Goodwill 1,399,484 Other assets 13,924 Accounts payable, accrued liabilities, and other current liabilities (200,974) Debt (1,729,451) Other liabilities (64,054) $ 4,250,000 The Company recognized the identifiable intangible assets of CityCenter at fair value, which consisted of indefinite-lived trade names, which was determined using methodologies under the relief from royalty method based on significant inputs that were not observable. The goodwill is primarily attributable to the profitability of CityCenter in excess of identifiable assets. Based upon preliminary tax determinations as of September 30, 2021, approximately 50% of the goodwill is expected to be deductible for income tax purposes. All of the goodwill was assigned to the Company’s Las Vegas Strip Resorts segment. Results. CityCenter’s net revenue for the period from September 27, 2021 through September 30, 2021 was $14 million and operating income and net income were each $3 million. Unaudited pro forma information. The operating results for CityCenter are included in the accompanying consolidated statements of operations from the date of acquisition. The following unaudited pro forma consolidated financial information for the Company has been prepared assuming the Company’s acquisition of its controlling interest had occurred as of January 1, 2020 and excludes the gain on consolidation discussed above. The pro forma information does not reflect transactions that occurred subsequent to acquisition, such as the subsequent sale-leaseback transaction or the repayment of CityCenter's assumed debt. The unaudited pro forma financial information below is not necessarily indicative of either future results of operations or results that might have been achieved had the acquisition been consummated as of January 1, 2020. Nine Months Ended 2021 2020 (In thousands) Net revenues $ 7,096,711 $ 3,911,327 Net income attributable to MGM Resorts International 291,469 (600,236)

Investments in and Advances to

Investments in and Advances to Unconsolidated Affiliates	9 Months Ended
	Sep. 30, 2021
Equity Method Investments and Joint Ventures [Abstract]
Investments in and Advances to Unconsolidated Affiliates	INVESTMENTS IN AND ADVANCES TO UNCONSOLIDATED AFFILIATES Investments in and advances to unconsolidated affiliates consisted of the following: September 30, December 31, (In thousands) CityCenter (50% as of December 31, 2020) $ — $ 441,893 MGP BREIT Venture (50.1% owned by the Operating Partnership) 815,399 810,066 BetMGM (50%) 22,983 27,310 Other 102,763 167,774 $ 941,145 $ 1,447,043 The Company recorded its share of income (loss) from unconsolidated affiliates, including adjustments for basis differences, as follows: Three Months Ended Nine Months Ended 2021 2020 2021 2020 (In thousands) Income from unconsolidated affiliates $ 35,111 $ 20,635 $ 92,870 $ 48,030 Non-operating items from unconsolidated affiliates (23,421) (23,604) (67,473) (79,986) $ 11,690 $ (2,969) $ 25,397 $ (31,956) The following table summarizes information related to the Company’s share of operating income (loss) from unconsolidated affiliates: Three Months Ended Nine Months Ended 2021 2020 2021 2020 (In thousands) CityCenter (through September 26, 2021) $ 40,747 $ (6,041) $ 128,127 $ (24,489) MGP BREIT Venture 38,959 38,976 116,876 97,787 BetMGM (49,060) (9,057) (154,275) (24,976) Other 4,465 (3,243) 2,142 (292) $ 35,111 $ 20,635 $ 92,870 $ 48,030 MGP BREIT Venture distributions. For the three and nine months ended September 30, 2021, the Operating Partnership received $24 million and $70 million in distributions from MGP BREIT Venture, respectively. For the three and nine months ended September 30, 2020, the Operating Partnership received $23 million and $58 million in distributions from MGP BREIT Venture, respectively. BetMGM contributions. For the three and nine months ended September 30, 2021, the Company contributed $50 million and $150 million to BetMGM, respectively. For the three and nine months ended September 30, 2020, the Company contributed $25 million and $55 million to BetMGM, respectively. CityCenter distributions. In April 2020, CityCenter paid a $101 million distribution, of which the Company received its 50% share, or approximately $51 million. CityCenter sale of Harmon land. In June 2021, CityCenter closed the sale of its Harmon land for $80 million on which it recorded a $30 million gain. The Company recorded a $50 million gain, which included $15 million of its 50% share of the gain recorded by CityCenter and $35 million representing the reversal of certain basis differences. Other. During the nine months ended September 30, 2020, the Company recognized other-than-temporary impairment charges of $64 million within “Property transactions, net” in the consolidated statements of operations related to an investment in an unconsolidated affiliate previously classified within “Other” in the “Investments in and advances to unconsolidated affiliates” table above.

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill and other intangible assets consisted of the following: September 30, December 31, (In thousands) Goodwill $ 3,484,966 $ 2,091,278 Indefinite-lived intangible assets: Detroit development rights $ 98,098 $ 98,098 MGM Northfield Park and Empire City racing and gaming licenses 280,000 280,000 Trademarks and other 479,238 299,238 Total indefinite-lived intangible assets 857,336 677,336 Finite-lived intangible assets: MGM Grand Paradise gaming subconcession 4,522,623 4,541,990 Less: Accumulated amortization (1,823,362) (1,697,481) 2,699,261 2,844,509 MGM National Harbor and MGM Springfield gaming licenses 106,600 106,600 Less: Accumulated amortization (24,432) (19,102) 82,168 87,498 Other finite-lived intangible assets 65,207 60,649 Less: Accumulated amortization (34,865) (26,244) 30,342 34,405 Total finite-lived intangible assets, net 2,811,771 2,966,412 Total other intangible assets, net $ 3,669,107 $ 3,643,748 Goodwill. A summary of changes in the Company’s goodwill by reportable segment is as follows for the nine months ended September 30, 2021 and twelve months ended December 31, 2020: 2021 Balance at January 1 Acquisitions Currency exchange Balance at September 30 (In thousands) Goodwill, net by segment: Las Vegas Strip Resorts $ 30,452 $ 1,399,484 $ — $ 1,429,936 Regional Operations 701,463 — — 701,463 MGM China 1,359,363 — (5,796) 1,353,567 $ 2,091,278 $ 1,399,484 $ (5,796) $ 3,484,966 2020 Balance at January 1 Acquisitions Currency exchange Balance at December 31 (In thousands) Goodwill, net by segment: Las Vegas Strip Resorts $ 30,452 $ — $ — $ 30,452 Regional Operations 701,463 — — 701,463 MGM China 1,352,649 — 6,714 1,359,363 $ 2,084,564 $ — $ 6,714 $ 2,091,278 Goodwill was recognized in 2021 related to the acquisition of the 50% ownership interest in CityCenter, which is included in Las Vegas Strip Resorts, as further discussed in Note 3. MGM Grand Paradise gaming subconcession. Pursuant to the agreement dated April 19, 2005 between MGM Grand Paradise and SJM Resorts S.A. (“SJMSA”, formerly Sociedade de Jogos de Macau, S.A.), a gaming subconcession was acquired by MGM Grand Paradise for the right to operate casino games of chance and other casino games for a period commencing on April 20, 2005 through March 31, 2020. In March 2019, MGM Grand Paradise and SJMSA entered into a Subconcession Extension Contract (the “Extension Agreement”), pursuant to which the gaming subconcession was extended to June 26, 2022, which coincides with the current expiration of all the other concessions and subconcessions. MGM Grand Paradise paid the government of Macau approximately $25 million and paid SJMSA approximately $2 million as a contract premium for such extension. The Company cannot provide any assurance that the gaming subconcession will be extended beyond the current term; however, management believes that the gaming subconcession will be extended or replaced with a similar governmental license. As such, as of September 30, 2021 and December 31, 2020, the Company amortizes the gaming subconcession intangible asset on a straight-line basis over the initial term of the Cotai land concession, ending in January 2038.

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Long-Term Debt	LONG-TERM DEBT Long-term debt consisted of the following: September 30, December 31, (In thousands) Operating Partnership senior credit facility $ — $ 10,000 MGM China first revolving credit facility 264,574 770,034 7.75% senior notes, due 2022 1,000,000 1,000,000 6% senior notes, due 2023 1,250,000 1,250,000 5.625% Operating Partnership senior notes, due 2024 1,050,000 1,050,000 5.375% MGM China senior notes, due 2024 750,000 750,000 6.75% senior notes, due 2025 750,000 750,000 5.75% senior notes, due 2025 675,000 675,000 4.625% Operating Partnership senior notes, due 2025 800,000 800,000 5.25% MGM China senior notes, due 2025 500,000 500,000 5.875% MGM China senior notes, due 2026 750,000 750,000 4.5% Operating Partnership senior notes, due 2026 500,000 500,000 4.625% senior notes, due 2026 400,000 400,000 5.75% Operating Partnership senior notes, due 2027 750,000 750,000 5.5% senior notes, due 2027 675,000 675,000 4.75% MGM China senior notes, due 2027 750,000 — 4.5% Operating Partnership senior notes, due 2028 350,000 350,000 4.75% senior notes, due 2028 750,000 750,000 3.875% Operating Partnership senior notes, due 2029 750,000 750,000 7% debentures, due 2036 552 552 12,715,126 12,480,586 Less: Premiums, discounts, and unamortized debt issuance costs, net (96,213) (103,902) 12,618,913 12,376,684 Less: Current portion (1,000,000) — $ 11,618,913 $ 12,376,684 Senior credit facility. At September 30, 2021, the Company’s senior credit facility consisted of a $1.5 billion revolving facility. At September 30, 2021, no amounts were drawn on the revolving credit facility. In February 2021, the Company amended its credit facility to extend the covenant relief period provided under the previous amendment related to its financial maintenance covenants through the earlier of (x) the day immediately following the date the Company delivers to the administrative agent a compliance certificate with respect to the quarter ending June 30, 2022 and (y) the date the Company delivers to the administrative agent an irrevocable notice terminating the covenant relief period, and to adjust the required leverage and interest coverage levels for the covenant when it is reimposed at the end of the waiver period. In addition, in connection with the February 2021 amendment, the Company agreed to an increase of the liquidity test such that the Company’s borrower group (as defined in the credit agreement) is required to maintain a minimum liquidity level of not less than $1.0 billion (including unrestricted cash, cash equivalents and availability under the revolving credit facility), tested at the end of each month during the covenant relief period. The Company’s senior credit facility contains customary representations and warranties, events of default and positive and negative covenants. The Company was in compliance with its applicable covenants at September 30, 2021. Operating Partnership senior credit facility and bridge facility. At September 30, 2021, the Operating Partnership senior credit facility consisted of a $1.35 billion revolving credit facility. At September 30, 2021, no amounts were drawn on the revolving credit facility. The Operating Partnership was in compliance with its revolving credit facility covenants at September 30, 2021. The Operating Partnership is party to interest rate swaps to mitigate the effects of interest rate volatility inherent in its variable rate debt as well as forecasted debt issuances. As of September 30, 2021, the Operating Partnership has currently effective interest rate swap agreements on which it pays a weighted average fixed rate of 1.783% on total notional amount of $700 million. The Operating Partnership has an additional $900 million total notional amount of forward starting interest rate swaps that are not currently effective. The fair value of interest rate swaps designated as cash flow hedges was $31 million, with $4 million recorded as a current liability and $27 million recorded as a long-term liability, as of September 30, 2021, and $41 million, with $1 million recorded as a current liability and $40 million recorded as a long-term liability, as of December 31, 2020. The fair value of interest rate swaps not designated as cash flow hedges was $33 million, with $11 million recorded as a current liability and $22 million recorded as a long-term liability, as of September 30, 2021, and $78 million, with $31 million recorded as a current liability and $47 million recorded as a long-term liability, as of December 31, 2020. Interest rate swaps in a current liability position are recorded within “Other accrued expenses” and those in a long-term liability position are recorded within “Other long-term liabilities” on the consolidated balance sheets. MGM China first revolving credit facility. At September 30, 2021, the MGM China first revolving credit facility consisted of a $1.25 billion unsecured revolving credit facility. At September 30, 2021, $265 million was drawn on the MGM China first revolving credit facility and the weighted average interest rate was 2.81%. The MGM China first revolving credit facility contains customary representations and warranties, events of default, and positive, negative and financial covenants, including that MGM China maintains compliance with a maximum leverage ratio and a minimum interest coverage ratio. In February 2021, MGM China amended its credit agreement to provide for a waiver of its maximum leverage ratio and its minimum interest coverage ratio through the fourth quarter of 2022. MGM China was in compliance with its applicable MGM China first revolving credit facility covenants at September 30, 2021. MGM China second revolving credit facility. At September 30, 2021, the MGM China second revolving credit facility consisted of a $400 million unsecured revolving credit facility with an option to increase the amount of the facility up to $500 million, subject to certain conditions. Draws will be subject to satisfaction of certain conditions precedent, including evidence that the MGM China first revolving credit facility has been fully drawn. At September 30, 2021, no amounts were drawn on the MGM China second revolving credit facility . The MGM China second revolving credit facility contains customary representations and warranties, events of default, and positive, negative and financial covenants, including that MGM China maintains compliance with a maximum leverage ratio and a minimum interest coverage ratio beginning in the third quarter of 2021. In February 2021, MGM China amended its credit agreement to provide for a waiver of its maximum leverage ratio and its minimum interest coverage ratio through the fourth quarter of 2022. MGM China was in compliance with its applicable MGM China second revolving credit facility covenants at September 30, 2021. MGM China senior notes. In March 2021, MGM China issued $750 million in aggregate principal amount of 4.75% senior notes due 2027 at an issue price of 99.97%. CityCenter senior credit facility. In connection with the CityCenter acquisition, the Company assumed $1.7 billion of CityCenter's indebtedness, which was repaid and extinguished in September 2021 with cash on hand. Fair value of long-term debt. The estimated fair value of the Company’s long-term debt was $13.4 billion and $13.2 billion at September 30, 2021 and December 31, 2020, respectively. Fair value was estimated using quoted market prices for the Company’s senior notes and credit facilities.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES For interim income tax reporting the Company estimates its annual effective tax rate and applies it to its year-to-date ordinary income. The tax effects of unusual or infrequently occurring items, including changes in judgment about valuation allowances and effects of changes in tax laws or rates, are reported in the interim period in which they occur. The Company’s effective income tax rate was a provision of 17.4% and 16.9% on income before income taxes for the three and nine months ended September 30, 2021, respectively, compared to benefits of 11.3% and 8.9% on loss before income taxes for the three and nine months ended September 30, 2020, respectively. The Company recognizes deferred income tax assets, net of applicable reserves, related to net operating losses, tax credit carryforwards and certain temporary differences. The Company recognizes future tax benefits to the extent that realization of such benefit is more likely than not. Otherwise, a valuation allowance is applied. The Company increased its valuation allowance for its foreign tax credits (“FTCs”) by $10 million and $5 million in the three and nine months ended September 30, 2021, respectively, with a corresponding increase to provision for income taxes. The Company's FTCs are attributable to the Macau Special Gaming Tax, which is 35% of gross gaming revenue in Macau. Significant judgment is required in assessing the need for a valuation allowance and future changes to assumptions used in this assessment could result in material changes in the valuation allowance with a corresponding impact on the provision for income taxes in the period including such change. An extension of the annual fee arrangement that covers distributions of profits earned for the period of April 1, 2020 through June 26, 2022 was accepted by MGM Grand Paradise and confirmed by the Macau government on July 26, 2021. The agreement with the Macau government allows MGM Grand Paradise to settle the 12% complementary tax that would otherwise be due by its shareholder, MGM China, on distributions of its gaming profits by paying a flat annual fee regardless of the amount of distributable dividends. The agreement requires payments of approximately $1 million for the period April 1, 2020 through December 31, 2020, $2 million for January 1, 2021 through December 31, 2021, and $1 million for the period January 1, 2022 through June 26, 2022. The Company accrued $3 million of income tax expense through the three and nine months ended September 30, 2021 under the extension, including $1 million for the April 1, 2020 through December 31, 2020 period. During the nine months ended September 30, 2021, the Company reached a settlement with the IRS Appeals Office on the examination of its 2014 U.S. consolidated federal income tax return. No cash tax payments were due as a result of the settlement. In addition, one of the Company's subsidiaries, Marina District Development Company, LLC, closed an examination in the state of New Jersey for tax years 2015 through 2018 with no change in tax due. As a result of the federal and New Jersey audit closures, the Company reversed $30 million of unrecognized tax benefits during the nine months ended September 30, 2021, none of which was recognized during the current year quarter.

Leases

Leases	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Leases	LEASES The Company leases the land underlying certain of its properties, real estate, and various equipment under operating and, to a lesser extent, finance lease arrangements. The master lease agreement with MGP is eliminated in consolidation and, accordingly is not included within the disclosures below; refer to Note 13 for further discussion of the master lease with MGP. Bellagio real estate assets. The Bellagio lease has an initial term of 30 years that began on November 15, 2019, with two subsequent ten-year renewal periods, exercisable at the Company’s option. The initial term of the lease provides for a fixed 2% escalator to rent for the first ten years and, thereafter, an escalator equal to the greater of 2% and the CPI increase during the prior year, subject to a cap of 3% during the 11th through 20th years and 4% thereafter. As a result of the fixed 2% escalator that went into effect on December 1, 2020 in connection with the commencement of the second lease year, annual cash rent payments increased to $250 million. The Company was in compliance with its applicable lease covenants as of September 30, 2021 . Mandalay Bay and MGM Grand Las Vegas real estate assets. The Mandalay Bay and MGM Grand Las Vegas lease has an initial term of 30 years that began on February 14, 2020, with two subsequent ten-year renewal periods, exercisable at the Company’s option. The initial term of the lease provides for a fixed 2% escalator to rent for the first fifteen years and, thereafter, an escalator equal to the greater of 2% and the CPI increase during the prior year, subject to a cap of 3%. As a result of the fixed 2% escalator that went into effect on March 1, 2021 in connection with the commencement of the second lease year, annual cash rent payments increased to $298 million. The Company was in compliance with its applicable lease covenants as of September 30, 2021. Aria and Vdara real estate assets. The Aria and Vdara lease has an initial term of 30 years with three subsequent ten-year renewal periods, exercisable at the Company's option. The initial term of the lease provides for an initial annual cash rent of $215 million with a fixed 2% escalator for the first fifteen years, and thereafter, an escalator equal to the greater of 2% and the CPI increase during the prior year, subject to a cap of 3%. The Company does not consider the renewal options reasonably certain of being exercised and, accordingly, has determined the lease term to be 30 years. In consideration of such, the Company determined the expected lease term of 30 years to be less than 75% of the economic useful life of the real estate assets of Aria and Vdara. Further, the lessor provided its implicit rate to the Company, with which the Company determined that the present value of the future minimum lease payments is less than 90% of the fair value of the real estate assets. Accordingly, in consideration of these lease classification tests, as well as the fact that the lease does not transfer ownership of the assets back to the Company at the end of the lease term or grant the Company a purchase option and the real estate assets have alternative uses at the end of the lease term, the Company classified the Aria and Vdara lease as an operating lease. Additionally, the lease requires the Company to spend a specified percentage of net revenues over a rolling five-year period at the property on capital expenditures and for the Company to comply with certain financial covenants, which, if not met, would require the Company to maintain cash security or a letter of credit in favor of the landlord in an amount equal to rent for the succeeding one-year period. The Company was in compliance with its applicable lease covenants as of September 30, 2021. Other information. Components of lease costs and other information related to the Company’s leases was as follows: Three Months Ended Nine Months Ended 2021 2020 2021 2020 (In thousands) Operating lease cost, primarily classified within "General and administrative" (1) $ 201,265 $ 199,166 $ 599,219 $ 551,807 Finance lease costs Interest expense (2) $ 1,186 $ (5,990) $ 134 $ (19,796) Amortization expense 17,785 17,851 53,271 52,495 Total finance lease costs $ 18,971 $ 11,861 $ 53,405 $ 32,699 (1) The Bellagio lease and the Mandalay Bay and MGM Grand Las Vegas lease are held with related parties, as further discussed in Note 13. Operating lease cost includes $83 million for each of the three months ended September 30, 2021 and 2020 and, $248 million for each of the nine months ended September 30, 2021 and 2020 related to the Bellagio lease. Operating lease cost includes $99 million for each of the three months ended September 30, 2021 and 2020 and $296 million and $248 million for the nine months ended September 30, 2021 and 2020, respectively, related to the Mandalay Bay and MGM Grand Las Vegas lease. (2) For the three and nine months ended September 30, 2021 and 2020, interest expense includes the effect of COVID-19 related rent concessions received on certain finance leases, for which such effect was recognized as negative variable rent expense. September 30, December 31, Supplemental balance sheet information (In thousands) Operating leases Operating lease right-of-use assets, net (1) $ 11,551,415 $ 8,286,694 Operating lease liabilities - current, classified within "Other accrued liabilities" $ 31,632 $ 31,843 Operating lease liabilities - long-term (2) 11,775,109 8,390,117 Total operating lease liabilities $ 11,806,741 $ 8,421,960 Finance leases Finance lease right-of-use assets, net classified within "Property and equipment, net" $ 168,886 $ 200,980 Finance lease liabilities - current, classified within "Other accrued liabilities" $ 84,298 $ 80,193 Finance lease liabilities - long-term, classified within "Other long-term obligations" 91,879 134,287 Total finance lease liabilities $ 176,177 $ 214,480 Weighted-average remaining lease term (years) Operating leases 29 30 Finance leases 2 3 Weighted-average discount rate (%) Operating leases 7 8 Finance leases 3 3 (1) As of September 30, 2021 and December 31, 2020, operating lease right-of-use assets, net included $3.6 billion and $3.7 billion related to the Bellagio lease, respectively, and $4.0 billion related to the Mandalay Bay and MGM Grand Las Vegas lease for each of the respective periods. (2) As of September 30, 2021 and December 31, 2020, operating lease liabilities – long-term included $3.8 billion related to the Bellagio lease for each of the respective periods, and $4.1 billion related to the Mandalay Bay and MGM Grand Las Vegas lease for each of the respective periods. Nine Months Ended 2021 2020 Cash paid for amounts included in the measurement of lease liabilities (In thousands) Operating cash outflows from operating leases $ 483,031 $ 421,932 Operating cash outflows from finance leases 3,685 1,741 Financing cash outflows from finance leases (1) 55,815 19,514 ROU assets obtained in exchange for new lease liabilities Operating leases $ 3,388,103 $ 4,120,312 Finance leases 21,081 175,446 (1) Included within “Other” within the “Cash flows from financing activities” on the accompanying consolidated statements of cash flows. Maturities of lease liabilities were as follows: Operating Leases Finance Leases Year ending December 31, (In thousands) 2021 (excluding the nine months ended September 30, 2021) $ 187,052 $ 24,688 2022 836,616 81,942 2023 849,198 72,871 2024 863,096 1,029 2025 876,445 514 Thereafter 27,580,105 — Total future minimum lease payments 31,192,512 181,044 Less: Amount of lease payments representing interest (19,385,771) (4,867) Present value of future minimum lease payments 11,806,741 176,177 Less: Current portion (31,632) (84,298) Long-term portion of lease liabilities $ 11,775,109 $ 91,879

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Litigation. The Company is a party to various 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 . Other guarantees. The Company and its subsidiaries are party to various guarantee contracts in the normal course of business, which are generally supported by letters of credit issued by financial institutions . The Company’s senior credit facility limits the amount of letters of credit that can be issued to $850 million. At September 30, 2021, $33 million in letters of credit were outstanding under the Company’s senior credit facility. The Operating Partnership’s senior credit facility limits the amount of letters of credit that can be issued to $75 million. No letters of credit were outstanding under the Operating Partnership’s senior credit facility at September 30, 2021. The amount of available borrowings under each of the credit facilities is reduced by any outstanding letters of credit. MGM China bank guarantee. In connection with the extension of the expiration of the gaming subconcession to June 2022, MGM Grand Paradise provided a bank guarantee to the government of Macau in May 2019 to warrant the fulfillment of an existing commitment of labor liabilities upon the expiration of the gaming subconcession in June 2022. The amount of the bank guarantee was approximately $102 million as of September 30, 2021 when giving effect to foreign currency exchange rate fluctuation. Bellagio BREIT Venture shortfall guarantee. The Company provides a shortfall guarantee of the $3.01 billion principal amount of indebtedness (and any interest accrued and unpaid thereon) of Bellagio BREIT Venture, which matures in 2029. The terms of the shortfall guarantee 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 Bellagio owned by Bellagio BREIT Venture, and the debt obligation. This guarantee is accounted for under ASC 460 at fair value; such value is immaterial. MGP BREIT Venture shortfall guarantee. The Company provides a shortfall guarantee of the $3.0 billion principal amount of indebtedness (and any interest accrued and unpaid thereon) of MGP BREIT Venture, which has an initial term of twelve years, maturing in 2032, with an anticipated repayment date of March 2030. The terms of the shortfall guarantee 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 Mandalay Bay and MGM Grand Las Vegas, owned by MGP BREIT Venture, and the debt obligation. This guarantee is accounted for under ASC 460 at fair value; such value is immaterial. MGP BREIT Venture bad acts guarantee. The Operating Partnership provides a guarantee for the losses incurred by the lenders of the indebtedness of the MGP BREIT Venture arising out of certain bad acts by the Operating Partnership, its venture partner, or the venture, such as fraud or willful misconduct, based on the party’s percentage ownership of the MGP

Income Per Share of Common Stoc

Income Per Share of Common Stock	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Income Per Share of Common Stock	INCOME PER SHARE OF COMMON STOCK The table below reconciles basic and diluted income per share of common stock. Diluted weighted-average common and common equivalent shares include adjustments for potential dilution of share-based awards outstanding under the Company’s stock compensation plan. Three Months Ended Nine Months Ended 2021 2020 2021 2020 (In thousands) Numerator: Net income (loss) attributable to MGM Resorts International $ 1,350,433 $ (534,731) $ 1,123,357 $ (585,119) Adjustment related to redeemable noncontrolling interests (7,580) 1,777 (54,019) 42,028 Net income (loss) available to common stockholders – basic 1,342,853 (532,954) 1,069,338 (543,091) Other — (25) — (21) Net income (loss) attributable to common stockholders - diluted $ 1,342,853 $ (532,979) $ 1,069,338 $ (543,112) Denominator: Weighted-average common shares outstanding – basic 478,405 493,517 487,509 494,126 Potential dilution from share-based awards 5,810 — 5,675 — Weighted-average common and common equivalent shares – diluted 484,215 493,517 493,184 494,126 Antidilutive share-based awards excluded from the calculation of diluted earnings per share 77 6,183 32 5,143

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Stockholders' Equity	STOCKHOLDERS’ EQUITY Noncontrolling interest ownership transactions MGP Class A share issuance – March 2021. On March 15, 2021, MGP completed an offering of 22 million of its Class A shares, the proceeds of which were used to partially satisfy MGP’s obligations pursuant to the notice of redemption delivered by certain MGM subsidiaries, discussed below. Subsequent to MGP’s Class A share issuance and the redemption of Operating Partnership units, discussed below, the Company indirectly owned 42.1% of the partnership units in the Operating Partnership. Redemption of Operating Partnership units – March 2021. In March 2021, subsidiaries of the Company delivered a notice of redemption to MGP covering approximately 37 million Operating Partnership units that they held in accordance with the terms of the Operating Partnership’s partnership agreement. Upon receipt of the notice of redemption, MGP formed a conflicts committee to determine the mix of consideration that it would provide for the Operating Partnership units. The conflicts committee determined that MGP would redeem approximately 15 million Operating Partnership units for cash (with such Operating Partnership units retired upon redemption) and would satisfy its remaining obligation under that notice covering the remaining 22 million Operating Partnership units using the proceeds, net of the underwriters’ discount, of MGP’s Class A offering, for aggregate cash proceeds received by the Company of approximately $1.2 billion. The Company adjusted the carrying value of the noncontrolling interests for the change in noncontrolling interests’ ownership percentage of the Operating Partnership’s net assets, with offsetting adjustments to capital in excess of par value and accumulated other comprehensive loss. Subsequent to the collective transactions, the Company indirectly owned 42.1% of the partnership units in the Operating Partnership . MGP Class A share issuances – At-the-Market (“ATM”) program. During the three and nine months ended September 30, 2021, MGP issued less than 0.1 million and approximately 3 million Class A shares under its ATM program, which completed its ATM program. In connection with the issuances, the Operating Partnership issued an equal amount of Operating Partnership units to MGP. The Company adjusted the carrying value of the noncontrolling interests for the change in noncontrolling interests’ ownership percentage of the Operating Partnership’s net assets, with offsetting adjustments to capital in excess of par value and accumulated other comprehensive loss. Subsequent to the collective issuances, the Company indirectly owned 41.6% of the partnership units in the Operating Partnership. Other equity activity MGM Resorts International dividends. On November 3, 2021 the Company’s Board of Directors approved a quarterly dividend of $0.0025 per share that will be payable on December 15, 2021 to holders of record on December 10, 2021 . MGM Resorts International stock repurchase program. In February 2020, upon substantial completion of the May 2018 $2.0 billion stock repurchase program, the Company’s Board of Directors authorized a $3.0 billion stock repurchase program. Under the stock repurchase program, the Company may repurchase shares from time to time in the open market or in privately negotiated agreements. Repurchases of common stock may also be made under a Rule 10b5-1 plan, which would permit common stock to be repurchased when the Company might otherwise be precluded from doing so under insider trading laws. The timing, volume and nature of stock repurchases will be at the sole discretion of management, dependent on market conditions, applicable securities laws, and other factors, and may be suspended or discontinued at any time . During the three months ended September 30, 2021, the Company repurchased approximately 17 million shares of its common stock at an average price of $39.89 per share for an aggregate amount of $687 million. During the nine months ended September 30, 2021, the Company repurchased approximately 26 million shares of its common stock at an average price of $39.56 per share for an aggregate amount of $1.0 billion. Repurchased shares were retired. During the nine months ended September 30, 2021, the Company completed its May 2018 $2.0 billion stock repurchase program and the remaining availability under the February 2020 $3.0 billion stock repurchase program was $2.0 billion as of September 30, 2021. Subsequent to the quarter ended September 30, 2021, the Company repurchased 2 million shares of its common stock at an average price of $44.51 per share for an aggregate amount of $80 million. Repurchased shares were retired. There were no repurchases made during the three months ended September 30, 2020. During the nine months ended September 30, 2020, the Company repurchased approximately 11 million shares of its common stock at an average price of $32.57 per share for an aggregate amount of $354 million. Repurchased shares were retired. Accumulated other comprehensive loss. Changes in accumulated other comprehensive loss attributable to MGM Resorts International are as follows: Currency Translation Adjustments Cash Flow Hedges Other Total (In thousands) Balances, June 30, 2021 $ 8,844 $ (47,826) $ 17,809 $ (21,173) Other comprehensive income (loss) before reclassifications (11,956) 1,818 — (10,138) Amounts reclassified from accumulated other comprehensive loss to interest expense — 5,423 — 5,423 Other comprehensive income (loss), net of tax (11,956) 7,241 — (4,715) Other changes in accumulated other comprehensive loss: MGP Class A share issuances — — 1 1 Changes in accumulated other comprehensive loss: (11,956) 7,241 1 (4,714) Other comprehensive loss (income) attributable to noncontrolling interest 5,270 (4,656) — 614 Balances, September 30, 2021 $ 2,158 $ (45,241) $ 17,810 $ (25,273) Balances, December 31, 2020 $ 12,964 $ (55,357) $ 11,716 $ (30,677) Other comprehensive income (loss) before reclassifications (19,167) 7,824 — (11,343) Amounts reclassified from accumulated other comprehensive loss to interest expense — 16,805 — 16,805 Other comprehensive income (loss), net of tax (19,167) 24,629 — 5,462 Other changes in accumulated other comprehensive loss: MGP Class A share issuances — — 3,240 3,240 Redemption of Operating Partnership units — — 5,327 5,327 Other — — (2,473) (2,473) Changes in accumulated other comprehensive loss: (19,167) 24,629 6,094 11,556 Other comprehensive loss (income) attributable to noncontrolling interest 8,361 (14,513) — (6,152) Balances, September 30, 2021 $ 2,158 $ (45,241) $ 17,810 $ (25,273)

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Segment Information	SEGMENT INFORMATION The Company’s management views each of its casino resorts as an operating segment. Operating segments are aggregated based on their similar economic characteristics, types of customers, types of services and products provided, the regulatory environments in which they operate and their management and reporting structure. The Company has aggregated its operating segments into the following reportable segments: Las Vegas Strip Resorts, Regional Operations and MGM China. Las Vegas Strip Resorts . Las Vegas Strip Resorts consists of the following casino resorts: Aria (including Vdara), Bellagio, MGM Grand Las Vegas (including The Signature), Mandalay Bay (including Delano and Four Seasons), The Mirage, Luxor, New York-New York (including The Park), Excalibur, and Park MGM (including NoMad Las Vegas). Regional Operations. Regional Operations consists of the following casino resorts: MGM Grand Detroit in Detroit, Michigan; Beau Rivage in Biloxi, Mississippi; Gold Strike Tunica in Tunica, Mississippi; Borgata in Atlantic City, New Jersey; MGM National Harbor in Prince George’s County, Maryland; MGM Springfield in Springfield, Massachusetts; Empire City in Yonkers, New York; and MGM Northfield Park in Northfield Park, Ohio. MGM China. MGM China consists of MGM Macau and MGM Cotai. The Company’s operations related to investments in unconsolidated affiliates and certain other corporate operations and management services have not been identified as separate reportable segments; therefore, these operations are included in “Corporate and other” in the following segment disclosures to reconcile to consolidated results. Adjusted Property EBITDAR is the Company’s reportable segment GAAP measure, which management utilizes as the primary profit measure for its reportable segments and underlying operating segments. Adjusted Property EBITDAR is a measure defined as earnings before interest and other non-operating income (expense), taxes, depreciation and amortization, preopening and start-up expenses, gain on REIT transactions, net, restructuring costs (which represents costs related to severance, accelerated stock compensation expense, and consulting fees directly related to the operating model component of the MGM 2020 Plan), rent expense associated with triple-net operating and ground leases, income from unconsolidated affiliates related to investments in real estate ventures, and property transactions, net, and also excludes gain on consolidation of CityCenter, net, gain related to CityCenter’s sale of Harmon land recorded within income from unconsolidated affiliates, and corporate expense (which includes CEO transition expense and October 1 litigation settlement) and stock compensation expense, which are not allocated to each operating segment, and rent expense related to the master lease with MGP that eliminates in consolidation. The following tables present the Company’s segment information: Three Months Ended Nine Months Ended 2021 2020 2021 2020 (In thousands) Net revenue Las Vegas Strip Resorts Casino $ 422,541 $ 189,358 $ 1,008,108 $ 527,059 Rooms 403,010 137,869 846,053 526,838 Food and beverage 308,522 81,429 614,572 391,218 Entertainment, retail and other 246,894 72,762 461,766 320,920 1,380,967 481,418 2,930,499 1,766,035 Regional Operations Casino 719,630 464,789 2,024,149 1,078,596 Rooms 70,766 34,782 160,269 94,842 Food and beverage 92,148 38,646 211,661 138,052 Entertainment, retail and other 42,579 18,609 96,677 60,260 925,123 556,826 2,492,756 1,371,750 MGM China Casino 252,445 35,297 784,984 298,995 Rooms 16,683 2,800 47,585 19,344 Food and beverage 15,808 6,240 50,323 23,451 Entertainment, retail and other 4,123 2,530 13,152 10,162 289,059 46,867 896,044 351,952 Reportable segment net revenues 2,595,149 1,085,111 6,319,299 3,489,737 Corporate and other 112,390 40,809 303,949 178,809 $ 2,707,539 $ 1,125,920 $ 6,623,248 $ 3,668,546 Adjusted Property EBITDAR Las Vegas Strip Resorts $ 534,548 $ 15,125 $ 1,039,472 $ 178,277 Regional Operations 348,234 145,734 908,564 185,369 MGM China 6,996 (96,446) 20,352 (234,724) Reportable segment Adjusted Property EBITDAR 889,778 64,413 1,968,388 128,922 Other operating income (expense) Corporate and other, net (124,745) (113,190) (368,713) (374,769) Preopening and start-up expenses (1,547) (11) (1,642) (51) Property transactions, net (3,677) (4,116) (842) (85,440) Depreciation and amortization (279,403) (294,363) (853,579) (911,859) Gain on REIT transactions, net — — — 1,491,945 Gain on consolidation of CityCenter, net 1,562,329 — 1,562,329 — CEO transition expense — — — (44,401) October 1 litigation settlement — — — (49,000) Restructuring — — — (19,882) Triple-net operating lease and ground lease rent expense (191,622) (189,602) (570,851) (521,087) Gain related to sale of Harmon land - unconsolidated affiliate — — 49,755 — Income from unconsolidated affiliates related to real estate ventures 41,669 41,687 125,007 106,756 Operating income (loss) 1,892,782 (495,182) 1,909,852 (278,866) Non-operating income (expense) Interest expense, net of amounts capitalized (200,049) (173,808) (598,116) (487,701) Non-operating items from unconsolidated affiliates (23,421) (23,604) (67,473) (79,986) Other, net (49,241) 13,889 70,302 (102,054) (272,711) (183,523) (595,287) (669,741) Income (loss) before income taxes 1,620,071 (678,705) 1,314,565 (948,607) Benefit (provision) for income taxes (282,135) 76,734 (222,263) 84,668 Net income (loss) 1,337,936 (601,971) 1,092,302 (863,939) Less: Net loss attributable to noncontrolling interests 12,497 67,240 31,055 278,820 Net income (loss) attributable to MGM Resorts International $ 1,350,433 $ (534,731) $ 1,123,357 $ (585,119)

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2021
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS MGP As further described in Note 1, pursuant to the master lease with MGP, the Company leases the real estate assets of The Mirage, Luxor, New York-New York, Park MGM, Excalibur, The Park, Gold Strike Tunica, MGM Grand Detroit, Beau Rivage, Borgata, Empire City, MGM National Harbor and MGM Northfield Park from MGP. The annual rent payments under the MGP master lease for the sixth lease year, which commenced on April 1, 2021, increased to $843 million from $828 million, as a result of the fifth 2.0% fixed annual rent escalator that went into effect on April 1, 2021. In March 2021, the Company delivered a notice of redemption covering approximately 37 million Operating Partnership units that it held which was satisfied with aggregate cash proceeds of approximately $1.2 billion. Refer to Note 11 for further discussion of such redemption. In October 2021, MGP acquired the real estate assets of MGM Springfield from the Company for $400 million of cash consideration. MGM Springfield was added to the master lease between the Company and MGP. Following the closing of the transaction, the annual rent payment to MGP increased by $30 million, $27 million of which will be fixed and contractually grow at 2% per year with escalators subject to the tenant meeting an adjusted net revenue to rent ratio. Final regulatory approvals, which were not necessary for the transaction to close, are expected to be received within nine to twelve months following the close of the transaction. Until final regulatory approvals are obtained, the parties will be subject to a trust agreement, which provides for the property to go into a trust (or, at the Company’s option, be returned to the Company) during the interim period in the event that the regulator finds reasonable cause to believe that MGP may not be found suitable. The property will then remain in trust until a final determination regarding MGP’s suitability is made. All intercompany transactions, including transactions under the MGP master lease, have been eliminated in the Company’s consolidation of MGP. The public ownership of MGP’s Class A shares is recognized as noncontrolling interests in the Company’s consolidated financial statements. As further described in Note 1, in August 2021, the Company entered into an agreement with VICI and MGP whereby VICI will acquire MGP in a stock-for-stock transaction. Pursuant to the agreement, MGP Class A shareholders will receive 1.366 shares of newly issued VICI stock in exchange for each Class A share of MGP and the Company will receive 1.366 VICI OP units in exchange for each Operating Partnership unit that the Company holds. The fixed exchange ratio represents an agreed upon price of $43 per share of MGP Class A share to the five-day volume weighted average price of VICI stock as of the close of business on July 30, 2021. In connection with the exchange, VICI OP will redeem the majority of the Company’s VICI OP units for cash consideration of $4.4 billion, with the Company retaining an approximate $370 million ownership interest in VICI OP (based upon the close price of VICI stock as of August 3, 2021). MGP’s Class B share that is held by the Company will be cancelled. As part of the transaction, the Company will enter into an amended and restated master lease with VICI. The transaction is expected to close in the first half of 2022, subject to customary closing conditions, regulatory approvals, and approval by VICI stockholders (which was obtained on October 29, 2021). Bellagio BREIT Venture The Company has a 5% ownership interest in the Bellagio BREIT Venture, which owns the real estate assets of Bellagio and leases such assets to a subsidiary of the Company pursuant to a lease agreement. Refer to Note 8 for further information related to the Bellagio lease. MGP BREIT Venture MGP has a 50.1% ownership interest in the MGP BREIT Venture, which owns the real estate assets of Mandalay Bay and MGM Grand Las Vegas and leases such assets to a subsidiary of the Company pursuant to a lease agreement. Refer to Note 8 for further information related to the Mandalay Bay and MGM Grand Las Vegas lease.

Basis of Presentation and Sig_2

Basis of Presentation and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation . As permitted by the rules and regulations of the Securities and Exchange Commission (“SEC”), certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) have been condensed or omitted. These consolidated financial statements should be read in conjunction with the Company’s 2020 annual consolidated financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020.
Principles of consolidation	Principles of consolidation . The Company evaluates entities for which control is achieved through means other than voting rights to determine if it is the primary beneficiary of a variable interest entity (“VIE”). A VIE is an entity in which either (i) the equity investors as a group, if any, lack the power through voting or similar rights to direct the activities of such entity that most significantly impact such entity’s economic performance or (ii) the equity investment at risk is insufficient to finance that entity’s activities without additional subordinated financial support. The Company identifies the primary beneficiary of a VIE as the enterprise that has both of the following characteristics: (i) the power to direct the activities of the VIE that most significantly impact the entity’s economic performance; and (ii) the obligation to absorb losses or receive benefits of the VIE that could potentially be significant to the entity. The Company consolidates its investment in a VIE when it determines that it is its primary beneficiary. For these VIEs, the Company records a noncontrolling interest in the consolidated balance sheets. The Company may change its original assessment of a VIE upon subsequent events such as the modification of contractual arrangements that affect the characteristics or adequacy of the entity’s equity investments at risk and the disposition of all or a portion of an interest held by the primary beneficiary. The Company performs this analysis on an ongoing basis. Management has determined that MGP is a VIE because the Class A equity investors as a group lack the power through voting or similar rights to direct the activities of such entity that most significantly impact such entity’s economic performance. The Company has determined that it is the primary beneficiary of MGP and consolidates MGP because (i) its ownership of MGP’s single Class B share entitles it to a majority of the total voting power of MGP’s shares, and (ii) the exchangeable nature of the Operating Partnership units owned provide the Company the right to receive benefits from MGP that could potentially be significant to MGP. The Company has recorded MGP’s ownership interest in the Operating Partnership as noncontrolling interest in the Company’s consolidated financial statements. As of September 30, 2021, on a consolidated basis MGP had total assets of $10.1 billion, primarily related to its real estate investments, and total liabilities of $5.0 billion, primarily related to its indebtedness. Management has determined that Bellagio BREIT Venture is a VIE because the equity holders as a group lack the power through voting or similar rights to direct the activities of such entity that most significantly impact such entity’s economic performance. The Company has determined that it is not the primary beneficiary of Bellagio BREIT Venture and, accordingly, does not consolidate the venture, because the Company does not have power to direct the activities that could potentially be significant to the venture; BREIT, as the managing member, has such power. The Company has recorded its 5% ownership interest in Bellagio BREIT Venture as an investment in unconsolidated affiliates in the Company’s consolidated financial statements, for which such amount was $58 million as of September 30, 2021. The Company’s maximum exposure to loss as a result of its involvement with Bellagio BREIT Venture is equal to the carrying value of its investment, assuming no future capital funding requirements, plus the exposure to loss resulting from the Company’s guarantee of the debt of Bellagio BREIT Venture, which guarantee is immaterial as of September 30, 2021, as further discussed in Note 9. For entities determined not to be a VIE, the Company consolidates such entities in which the Company owns 100% of the equity. For entities in which the Company owns less than 100% of the equity interest, the Company consolidates the entity under the voting interest model if it has a controlling financial interest based upon the terms of the respective entities’ ownership agreements, such as MGM China. For these entities, the Company records a noncontrolling interest in the consolidated balance sheets and all intercompany balances and transactions are eliminated in consolidation. If the entity does not qualify for consolidation under the voting interest model and the Company has significant influence over the operating and financial decisions of the entity, the Company accounts for the entity under the equity method, such as the Company’s investments in MGP BREIT Venture and BetMGM, which do not qualify for consolidation as the Company has joint control, given the entities are structured with substantive participating rights whereby both owners participate in the decision making process, which prevents the Company from exerting a controlling financial interest in such entities, as defined in ASC 810. For equity interests in entities in which the Company does not have significant influence, the Company records its equity investment under ASC 321 and reflects such investments within “Other long-term assets, net” on the consolidated balance sheets. During the three and nine months ended September 30, 2021, the Company recorded a loss of $48 million and a gain of $39 million, respectively, within “Other, net” on the Company’s consolidated statement of operations related primarily to the change in fair value of an equity instrument that previously qualified for the measurement alternative under
Reclassifications	Reclassifications . Certain reclassifications have been made to conform the prior period presentation.
Fair value measurements	Fair value measurements . Fair value measurements affect the Company’s accounting and impairment assessments of its long-lived assets, investments in unconsolidated affiliates or in equity interests, assets acquired, and liabilities assumed in an acquisition, and goodwill and other intangible assets. Fair value measurements also affect the Company’s accounting for certain of its financial assets and liabilities. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date and is measured according to a hierarchy that includes: Level 1 inputs, such as quoted prices in an active market; Level 2 inputs, which are observable inputs for similar assets; or Level 3 inputs, which are unobservable inputs. The Company used the following inputs in its fair value measurements: • Level 1 inputs when measuring its equity investments under ASC 321; • Level 1 and Level 2 inputs for its long-term debt fair value disclosures. See Note 6; • Level 2 inputs when measuring the Operating Partnership’s fair value of its interest rate swaps. See Note 6; and
Revenue recognition	Revenue recognition . The Company’s revenue from contracts with customers consists of casino wagers transactions, hotel room sales, food and beverage transactions, entertainment shows, and retail transactions. For casino wager transactions that include incentives earned by customers under the Company’s loyalty programs, the Company allocates a portion of net win based upon the standalone selling price of such incentive (less estimated breakage). This allocation is deferred and recognized as revenue when the customer redeems the incentive. When redeemed, revenue is recognized in the department that provides the goods or service. Redemption of loyalty incentives at third party outlets are deducted from the loyalty liability and amounts owed are paid to the third party, with any discount received recorded as other revenue. After allocating revenue to other goods and services provided as part of casino wager transactions, the Company records the residual amount to casino revenue. Contract and Contract-Related Liabilities . There may be a difference between the timing of cash receipts from the customer and the recognition of revenue, resulting in a contract or contract-related liability. The Company generally has three types of liabilities related to contracts with customers: (1) outstanding chip liability, which represents the amounts owed in exchange for gaming chips held by a customer, (2) loyalty program obligations, which represents the deferred allocation of revenue relating to loyalty program incentives earned, as discussed above, and (3) customer advances and other, which is primarily funds deposited by customers before gaming play occurs (“casino front money”) and advance payments on goods and services yet to be provided such as advance ticket sales and deposits on rooms and convention space or for unpaid wagers. These liabilities are generally expected to be recognized as revenue within one year of being purchased, earned, or deposited and are recorded within “Other accrued liabilities” on the Company’s consolidated balance sheets. The following table summarizes the activity related to contract and contract-related liabilities: Outstanding Chip Liability Loyalty Program Customer Advances and Other 2021 2020 2021 2020 2021 2020 (In thousands) Balance at January 1 $ 212,671 $ 314,570 $ 139,756 $ 126,966 $ 382,287 $ 481,095 Balance at September 30 177,066 350,848 142,969 138,785 662,096 359,877 Increase / (decrease) $ (35,605) $ 36,278 $ 3,213 $ 11,819 $ 279,809 $ (121,218) Revenue by source. The Company presents the revenue earned disaggregated by the type or nature of the good or service (casino, room, food and beverage, and entertainment, retail and other) and by relevant geographic region within Note 12.
Leases	Leases. Refer to Note 8 for discussion of leases under which the Company is a lessee. The Company is a lessor under certain other lease arrangements. Lease revenues earned by the Company from third parties are classified within the line item corresponding to the type or nature of the tenant’s good or service . During the three and nine months ended September 30, 2021, lease revenues from third-party tenants include $13 million and $29 million recorded within food and beverage revenue, respectively, and $22 million and $58 million recorded within entertainment, retail, and other revenue for the same such periods, respectively. During the three and nine months ended September 30, 2020, lease revenues from third-party tenants include $7 million and $21 million recorded within food and beverage revenue, respectively, and $14 million and $47 million recorded within entertainment, retail, and other revenue for the same such periods, respectively. Lease revenues from the rental of hotel rooms are recorded as rooms revenues within the consolidated statements of operations.

Basis of Presentation and Sig_3

Basis of Presentation and Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Schedule of Contract and Contract - Related Liabilities	The following table summarizes the activity related to contract and contract-related liabilities: Outstanding Chip Liability Loyalty Program Customer Advances and Other 2021 2020 2021 2020 2021 2020 (In thousands) Balance at January 1 $ 212,671 $ 314,570 $ 139,756 $ 126,966 $ 382,287 $ 481,095 Balance at September 30 177,066 350,848 142,969 138,785 662,096 359,877 Increase / (decrease) $ (35,605) $ 36,278 $ 3,213 $ 11,819 $ 279,809 $ (121,218)

Acquisition (Tables)

Acquisition (Tables)	9 Months Ended
	Sep. 30, 2021
Business Combination and Asset Acquisition [Abstract]
Allocation of Purchase Price to Fair Value of Assets Acquired and Liabilities Assumed	The following table sets forth the preliminary purchase price allocation (in thousands): Fair value of assets acquired and liabilities assumed: Cash and cash equivalents $ 335,396 Receivables and other current assets 106,417 Property and equipment - real estate assets held for sale 3,888,431 Property and equipment 320,826 Trademarks 180,000 Goodwill 1,399,484 Other assets 13,924 Accounts payable, accrued liabilities, and other current liabilities (200,974) Debt (1,729,451) Other liabilities (64,054) $ 4,250,000
Schedule of Pro Forma Financial Information	The unaudited pro forma financial information below is not necessarily indicative of either future results of operations or results that might have been achieved had the acquisition been consummated as of January 1, 2020. Nine Months Ended 2021 2020 (In thousands) Net revenues $ 7,096,711 $ 3,911,327 Net income attributable to MGM Resorts International 291,469 (600,236)

Investments in and Advances t_2

Investments in and Advances to Unconsolidated Affiliates (Tables)	9 Months Ended
	Sep. 30, 2021
Equity Method Investments and Joint Ventures [Abstract]
Schedule of Investments in and Advances to Unconsolidated Affiliates	Investments in and advances to unconsolidated affiliates consisted of the following: September 30, December 31, (In thousands) CityCenter (50% as of December 31, 2020) $ — $ 441,893 MGP BREIT Venture (50.1% owned by the Operating Partnership) 815,399 810,066 BetMGM (50%) 22,983 27,310 Other 102,763 167,774 $ 941,145 $ 1,447,043
Schedule of Share of Net Income (Loss) From Unconsolidated Affiliates	The Company recorded its share of income (loss) from unconsolidated affiliates, including adjustments for basis differences, as follows: Three Months Ended Nine Months Ended 2021 2020 2021 2020 (In thousands) Income from unconsolidated affiliates $ 35,111 $ 20,635 $ 92,870 $ 48,030 Non-operating items from unconsolidated affiliates (23,421) (23,604) (67,473) (79,986) $ 11,690 $ (2,969) $ 25,397 $ (31,956)
Schedule of Share of Income (Loss) From Unconsolidated Affiliates	The following table summarizes information related to the Company’s share of operating income (loss) from unconsolidated affiliates: Three Months Ended Nine Months Ended 2021 2020 2021 2020 (In thousands) CityCenter (through September 26, 2021) $ 40,747 $ (6,041) $ 128,127 $ (24,489) MGP BREIT Venture 38,959 38,976 116,876 97,787 BetMGM (49,060) (9,057) (154,275) (24,976) Other 4,465 (3,243) 2,142 (292) $ 35,111 $ 20,635 $ 92,870 $ 48,030

Intangible Assets, Goodwill and

Intangible Assets, Goodwill and Other (Tables)	9 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill and Other Intangible Assets	Goodwill and other intangible assets consisted of the following: September 30, December 31, (In thousands) Goodwill $ 3,484,966 $ 2,091,278 Indefinite-lived intangible assets: Detroit development rights $ 98,098 $ 98,098 MGM Northfield Park and Empire City racing and gaming licenses 280,000 280,000 Trademarks and other 479,238 299,238 Total indefinite-lived intangible assets 857,336 677,336 Finite-lived intangible assets: MGM Grand Paradise gaming subconcession 4,522,623 4,541,990 Less: Accumulated amortization (1,823,362) (1,697,481) 2,699,261 2,844,509 MGM National Harbor and MGM Springfield gaming licenses 106,600 106,600 Less: Accumulated amortization (24,432) (19,102) 82,168 87,498 Other finite-lived intangible assets 65,207 60,649 Less: Accumulated amortization (34,865) (26,244) 30,342 34,405 Total finite-lived intangible assets, net 2,811,771 2,966,412 Total other intangible assets, net $ 3,669,107 $ 3,643,748
Schedule of Goodwill by Segment	Goodwill. A summary of changes in the Company’s goodwill by reportable segment is as follows for the nine months ended September 30, 2021 and twelve months ended December 31, 2020: 2021 Balance at January 1 Acquisitions Currency exchange Balance at September 30 (In thousands) Goodwill, net by segment: Las Vegas Strip Resorts $ 30,452 $ 1,399,484 $ — $ 1,429,936 Regional Operations 701,463 — — 701,463 MGM China 1,359,363 — (5,796) 1,353,567 $ 2,091,278 $ 1,399,484 $ (5,796) $ 3,484,966 2020 Balance at January 1 Acquisitions Currency exchange Balance at December 31 (In thousands) Goodwill, net by segment: Las Vegas Strip Resorts $ 30,452 $ — $ — $ 30,452 Regional Operations 701,463 — — 701,463 MGM China 1,352,649 — 6,714 1,359,363 $ 2,084,564 $ — $ 6,714 $ 2,091,278

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2021
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	Long-term debt consisted of the following: September 30, December 31, (In thousands) Operating Partnership senior credit facility $ — $ 10,000 MGM China first revolving credit facility 264,574 770,034 7.75% senior notes, due 2022 1,000,000 1,000,000 6% senior notes, due 2023 1,250,000 1,250,000 5.625% Operating Partnership senior notes, due 2024 1,050,000 1,050,000 5.375% MGM China senior notes, due 2024 750,000 750,000 6.75% senior notes, due 2025 750,000 750,000 5.75% senior notes, due 2025 675,000 675,000 4.625% Operating Partnership senior notes, due 2025 800,000 800,000 5.25% MGM China senior notes, due 2025 500,000 500,000 5.875% MGM China senior notes, due 2026 750,000 750,000 4.5% Operating Partnership senior notes, due 2026 500,000 500,000 4.625% senior notes, due 2026 400,000 400,000 5.75% Operating Partnership senior notes, due 2027 750,000 750,000 5.5% senior notes, due 2027 675,000 675,000 4.75% MGM China senior notes, due 2027 750,000 — 4.5% Operating Partnership senior notes, due 2028 350,000 350,000 4.75% senior notes, due 2028 750,000 750,000 3.875% Operating Partnership senior notes, due 2029 750,000 750,000 7% debentures, due 2036 552 552 12,715,126 12,480,586 Less: Premiums, discounts, and unamortized debt issuance costs, net (96,213) (103,902) 12,618,913 12,376,684 Less: Current portion (1,000,000) — $ 11,618,913 $ 12,376,684

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2021
Leases [Abstract]
Schedule of Components of Lease Costs and Other Information	Other information. Components of lease costs and other information related to the Company’s leases was as follows: Three Months Ended Nine Months Ended 2021 2020 2021 2020 (In thousands) Operating lease cost, primarily classified within "General and administrative" (1) $ 201,265 $ 199,166 $ 599,219 $ 551,807 Finance lease costs Interest expense (2) $ 1,186 $ (5,990) $ 134 $ (19,796) Amortization expense 17,785 17,851 53,271 52,495 Total finance lease costs $ 18,971 $ 11,861 $ 53,405 $ 32,699 (1) The Bellagio lease and the Mandalay Bay and MGM Grand Las Vegas lease are held with related parties, as further discussed in Note 13. Operating lease cost includes $83 million for each of the three months ended September 30, 2021 and 2020 and, $248 million for each of the nine months ended September 30, 2021 and 2020 related to the Bellagio lease. Operating lease cost includes $99 million for each of the three months ended September 30, 2021 and 2020 and $296 million and $248 million for the nine months ended September 30, 2021 and 2020, respectively, related to the Mandalay Bay and MGM Grand Las Vegas lease. (2) For the three and nine months ended September 30, 2021 and 2020, interest expense includes the effect of COVID-19 related rent concessions received on certain finance leases, for which such effect was recognized as negative variable rent expense.
Schedule of Supplemental Balance Sheet Information Related to Leases	September 30, December 31, Supplemental balance sheet information (In thousands) Operating leases Operating lease right-of-use assets, net (1) $ 11,551,415 $ 8,286,694 Operating lease liabilities - current, classified within "Other accrued liabilities" $ 31,632 $ 31,843 Operating lease liabilities - long-term (2) 11,775,109 8,390,117 Total operating lease liabilities $ 11,806,741 $ 8,421,960 Finance leases Finance lease right-of-use assets, net classified within "Property and equipment, net" $ 168,886 $ 200,980 Finance lease liabilities - current, classified within "Other accrued liabilities" $ 84,298 $ 80,193 Finance lease liabilities - long-term, classified within "Other long-term obligations" 91,879 134,287 Total finance lease liabilities $ 176,177 $ 214,480 Weighted-average remaining lease term (years) Operating leases 29 30 Finance leases 2 3 Weighted-average discount rate (%) Operating leases 7 8 Finance leases 3 3 (1) As of September 30, 2021 and December 31, 2020, operating lease right-of-use assets, net included $3.6 billion and $3.7 billion related to the Bellagio lease, respectively, and $4.0 billion related to the Mandalay Bay and MGM Grand Las Vegas lease for each of the respective periods. (2) As of September 30, 2021 and December 31, 2020, operating lease liabilities – long-term included $3.8 billion related to the Bellagio lease for each of the respective periods, and $4.1 billion related to the Mandalay Bay and MGM Grand Las Vegas lease for each of the respective periods.
Schedule of Cash Paid for Amounts Included in Measurement of Lease Liabilities and ROU Assets Obtained in Exchange for New Lease Liabilities	Nine Months Ended 2021 2020 Cash paid for amounts included in the measurement of lease liabilities (In thousands) Operating cash outflows from operating leases $ 483,031 $ 421,932 Operating cash outflows from finance leases 3,685 1,741 Financing cash outflows from finance leases (1) 55,815 19,514 ROU assets obtained in exchange for new lease liabilities Operating leases $ 3,388,103 $ 4,120,312 Finance leases 21,081 175,446 (1) Included within “Other” within the “Cash flows from financing activities” on the accompanying consolidated statements of cash flows.
Schedule of Operating Lease, Liability Maturity	Maturities of lease liabilities were as follows: Operating Leases Finance Leases Year ending December 31, (In thousands) 2021 (excluding the nine months ended September 30, 2021) $ 187,052 $ 24,688 2022 836,616 81,942 2023 849,198 72,871 2024 863,096 1,029 2025 876,445 514 Thereafter 27,580,105 — Total future minimum lease payments 31,192,512 181,044 Less: Amount of lease payments representing interest (19,385,771) (4,867) Present value of future minimum lease payments 11,806,741 176,177 Less: Current portion (31,632) (84,298) Long-term portion of lease liabilities $ 11,775,109 $ 91,879
Schedule of Finance Lease , Liability Maturity	Maturities of lease liabilities were as follows: Operating Leases Finance Leases Year ending December 31, (In thousands) 2021 (excluding the nine months ended September 30, 2021) $ 187,052 $ 24,688 2022 836,616 81,942 2023 849,198 72,871 2024 863,096 1,029 2025 876,445 514 Thereafter 27,580,105 — Total future minimum lease payments 31,192,512 181,044 Less: Amount of lease payments representing interest (19,385,771) (4,867) Present value of future minimum lease payments 11,806,741 176,177 Less: Current portion (31,632) (84,298) Long-term portion of lease liabilities $ 11,775,109 $ 91,879

Income Per Share of Common St_2

Income Per Share of Common Stock (Tables)	9 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Schedule of Diluted Weighted-Average Number of Common and Common Equivalent Shares Adjustments for Potential Dilution of Share-Based Awards Outstanding	The table below reconciles basic and diluted income per share of common stock. Diluted weighted-average common and common equivalent shares include adjustments for potential dilution of share-based awards outstanding under the Company’s stock compensation plan. Three Months Ended Nine Months Ended 2021 2020 2021 2020 (In thousands) Numerator: Net income (loss) attributable to MGM Resorts International $ 1,350,433 $ (534,731) $ 1,123,357 $ (585,119) Adjustment related to redeemable noncontrolling interests (7,580) 1,777 (54,019) 42,028 Net income (loss) available to common stockholders – basic 1,342,853 (532,954) 1,069,338 (543,091) Other — (25) — (21) Net income (loss) attributable to common stockholders - diluted $ 1,342,853 $ (532,979) $ 1,069,338 $ (543,112) Denominator: Weighted-average common shares outstanding – basic 478,405 493,517 487,509 494,126 Potential dilution from share-based awards 5,810 — 5,675 — Weighted-average common and common equivalent shares – diluted 484,215 493,517 493,184 494,126 Antidilutive share-based awards excluded from the calculation of diluted earnings per share 77 6,183 32 5,143

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2021
Equity [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Loss Attributable to MGM Resorts International by Component	Changes in accumulated other comprehensive loss attributable to MGM Resorts International are as follows: Currency Translation Adjustments Cash Flow Hedges Other Total (In thousands) Balances, June 30, 2021 $ 8,844 $ (47,826) $ 17,809 $ (21,173) Other comprehensive income (loss) before reclassifications (11,956) 1,818 — (10,138) Amounts reclassified from accumulated other comprehensive loss to interest expense — 5,423 — 5,423 Other comprehensive income (loss), net of tax (11,956) 7,241 — (4,715) Other changes in accumulated other comprehensive loss: MGP Class A share issuances — — 1 1 Changes in accumulated other comprehensive loss: (11,956) 7,241 1 (4,714) Other comprehensive loss (income) attributable to noncontrolling interest 5,270 (4,656) — 614 Balances, September 30, 2021 $ 2,158 $ (45,241) $ 17,810 $ (25,273) Balances, December 31, 2020 $ 12,964 $ (55,357) $ 11,716 $ (30,677) Other comprehensive income (loss) before reclassifications (19,167) 7,824 — (11,343) Amounts reclassified from accumulated other comprehensive loss to interest expense — 16,805 — 16,805 Other comprehensive income (loss), net of tax (19,167) 24,629 — 5,462 Other changes in accumulated other comprehensive loss: MGP Class A share issuances — — 3,240 3,240 Redemption of Operating Partnership units — — 5,327 5,327 Other — — (2,473) (2,473) Changes in accumulated other comprehensive loss: (19,167) 24,629 6,094 11,556 Other comprehensive loss (income) attributable to noncontrolling interest 8,361 (14,513) — (6,152) Balances, September 30, 2021 $ 2,158 $ (45,241) $ 17,810 $ (25,273)

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2021
Segment Reporting [Abstract]
Schedule of Segment Information	The following tables present the Company’s segment information: Three Months Ended Nine Months Ended 2021 2020 2021 2020 (In thousands) Net revenue Las Vegas Strip Resorts Casino $ 422,541 $ 189,358 $ 1,008,108 $ 527,059 Rooms 403,010 137,869 846,053 526,838 Food and beverage 308,522 81,429 614,572 391,218 Entertainment, retail and other 246,894 72,762 461,766 320,920 1,380,967 481,418 2,930,499 1,766,035 Regional Operations Casino 719,630 464,789 2,024,149 1,078,596 Rooms 70,766 34,782 160,269 94,842 Food and beverage 92,148 38,646 211,661 138,052 Entertainment, retail and other 42,579 18,609 96,677 60,260 925,123 556,826 2,492,756 1,371,750 MGM China Casino 252,445 35,297 784,984 298,995 Rooms 16,683 2,800 47,585 19,344 Food and beverage 15,808 6,240 50,323 23,451 Entertainment, retail and other 4,123 2,530 13,152 10,162 289,059 46,867 896,044 351,952 Reportable segment net revenues 2,595,149 1,085,111 6,319,299 3,489,737 Corporate and other 112,390 40,809 303,949 178,809 $ 2,707,539 $ 1,125,920 $ 6,623,248 $ 3,668,546 Adjusted Property EBITDAR Las Vegas Strip Resorts $ 534,548 $ 15,125 $ 1,039,472 $ 178,277 Regional Operations 348,234 145,734 908,564 185,369 MGM China 6,996 (96,446) 20,352 (234,724) Reportable segment Adjusted Property EBITDAR 889,778 64,413 1,968,388 128,922 Other operating income (expense) Corporate and other, net (124,745) (113,190) (368,713) (374,769) Preopening and start-up expenses (1,547) (11) (1,642) (51) Property transactions, net (3,677) (4,116) (842) (85,440) Depreciation and amortization (279,403) (294,363) (853,579) (911,859) Gain on REIT transactions, net — — — 1,491,945 Gain on consolidation of CityCenter, net 1,562,329 — 1,562,329 — CEO transition expense — — — (44,401) October 1 litigation settlement — — — (49,000) Restructuring — — — (19,882) Triple-net operating lease and ground lease rent expense (191,622) (189,602) (570,851) (521,087) Gain related to sale of Harmon land - unconsolidated affiliate — — 49,755 — Income from unconsolidated affiliates related to real estate ventures 41,669 41,687 125,007 106,756 Operating income (loss) 1,892,782 (495,182) 1,909,852 (278,866) Non-operating income (expense) Interest expense, net of amounts capitalized (200,049) (173,808) (598,116) (487,701) Non-operating items from unconsolidated affiliates (23,421) (23,604) (67,473) (79,986) Other, net (49,241) 13,889 70,302 (102,054) (272,711) (183,523) (595,287) (669,741) Income (loss) before income taxes 1,620,071 (678,705) 1,314,565 (948,607) Benefit (provision) for income taxes (282,135) 76,734 (222,263) 84,668 Net income (loss) 1,337,936 (601,971) 1,092,302 (863,939) Less: Net loss attributable to noncontrolling interests 12,497 67,240 31,055 278,820 Net income (loss) attributable to MGM Resorts International $ 1,350,433 $ (534,731) $ 1,123,357 $ (585,119)

Organization - Additional Infor

Organization - Additional Information (Detail) $ / shares in Units, $ in Millions	Sep. 28, 2021USD ($)	Sep. 27, 2021USD ($)renewal_period	Aug. 04, 2021USD ($)renewal_period$ / sharesshares	Sep. 30, 2021USD ($)segmentpropertyvoterenewal_period	Dec. 31, 2020
Organization Disclosure [Line Items]
Number of reportable segments | segment				3
City Center Holdings L L C
Organization Disclosure [Line Items]
Ownership interest acquired		50.00%
Cosmopolitan of Las Vegas
Organization Disclosure [Line Items]
Cash consideration		$ 1,625
BetMGM
Organization Disclosure [Line Items]
Percentage ownership interest				50.00%	50.00%
Entain plc | BetMGM
Organization Disclosure [Line Items]
Percentage ownership interest				50.00%
Bellagio BREIT Venture
Organization Disclosure [Line Items]
Percentage of minority interest				5.00%
MGP BREIT Venture
Organization Disclosure [Line Items]
Partnership interest				50.10%
Percentage of minority interest				49.90%
VICI Properties, Inc
Organization Disclosure [Line Items]
Shares newly issued ( in shares) | shares			1.366
Operating partnership units received (in shares) | shares			1.366
Cash consideration			$ 4,400
Ownership interest			$ 370
Lease agreement initial lease term			25 years
Number of renewal periods, exercisable at option | renewal_period			3
Lease agreement renewal period			10 years
Annual rent			$ 860
Annual rent escalating from year one through year ten			2.00%
Annual rent escalator after year ten			2.00%
Annual rent escalator cap after year ten			3.00%
VICI Properties, Inc | MGP
Organization Disclosure [Line Items]
Fixed exchange ratio (in dollars per share) | $ / shares			$ 43
Cosmopolitan of Las Vegas
Organization Disclosure [Line Items]
Lease agreement initial lease term		30 years
Number of renewal periods, exercisable at option | renewal_period		3
Lease agreement renewal period		10 years
Annual rent		$ 200
Annual rent escalating from year one through year ten		2.00%
Annual rent escalator cap after year ten		3.00%
Affiliated Entity | Aria and Vdara
Organization Disclosure [Line Items]
Lease agreement initial lease term				30 years
Number of renewal periods, exercisable at option | renewal_period				3
Lease agreement renewal period				10 years
Annual rent				$ 215
Affiliated Entity | Aria and Vdara | City Center Holdings L L C
Organization Disclosure [Line Items]
Cash consideration for sale of assets	$ 3,890
Subsidiary of Blackstone Real Estate Income Trust | Bellagio BREIT Venture
Organization Disclosure [Line Items]
Percentage of ownership interest				95.00%
MGM China
Organization Disclosure [Line Items]
Percentage ownership interest				56.00%
Number of integrated casino | property				2
Non-Guarantor MGP Subsidiaries | Class A shares
Organization Disclosure [Line Items]
Common stock, number of votes per share | vote				1
MGM Growth Properties LLC
Organization Disclosure [Line Items]
Minimum ownership percentage required for majority voting interest				30.00%
Partnership interest				41.60%
Percentage of minority interest				58.40%

Basis of Presentation and Sig_4

Basis of Presentation and Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Total assets	$ 41,338,323		$ 41,338,323		$ 36,494,934
Investments in and advances to unconsolidated affiliates	941,145		$ 941,145		$ 1,447,043
Percentage of ownership interest			100.00%
Fair value of equity investment	76,000		$ 76,000
MGM Growth Properties LLC
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Total assets	10,100,000		10,100,000
Total liabilities	5,000,000		5,000,000
Other, Net
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Gain on change in measurement of equity instrument	48,000		39,000
Food and Beverage Revenue
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Lease revenue	13,000	$ 7,000	29,000	$ 21,000
Entertainment Retail and Other Revenue
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Lease revenue	22,000	$ 14,000	$ 58,000	$ 47,000
Bellagio Blackstone Real Estate Income Trust
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of ownership interest			5.00%
Investments in and advances to unconsolidated affiliates	$ 58,000		$ 58,000

Basis of Presentation and Sig_5

Basis of Presentation and Significant Accounting Policies - Schedule of Contract and Contract - Related Liabilities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Outstanding Chip Liability
Contract And Contract Related Liabilities [Roll Forward]
Balance at January 1	$ 212,671	$ 314,570
Balance at September 30	177,066	350,848
Increase / (decrease)	(35,605)	36,278
Loyalty Program
Contract And Contract Related Liabilities [Roll Forward]
Balance at January 1	139,756	126,966
Balance at September 30	142,969	138,785
Increase / (decrease)	3,213	11,819
Customer Advances and Other
Contract And Contract Related Liabilities [Roll Forward]
Balance at January 1	382,287	481,095
Balance at September 30	662,096	359,877
Increase / (decrease)	$ 279,809	$ (121,218)

Acquisition - Additional Inform

Acquisition - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Sep. 28, 2021	Sep. 27, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Business Acquisition [Line Items]
Cash consideration for acquisition						$ 1,789,604	$ 0
Gain on consolidation				$ 1,562,329	$ 0	1,562,329	0
Proceeds from sale of Aria and Vdara real estate assets						$ 3,888,431	$ 0
Acquiree operating income	$ 3,000
Acquiree net income	$ 3,000
City Center Holdings L L C
Business Acquisition [Line Items]
Ownership interest acquired			50.00%
Cash consideration for acquisition			$ 2,125,000
Ownership interest after transaction			100.00%
Ownership interest prior to transaction			50.00%
Fair value of equity interests acquired			$ 4,250,000
Gain on consolidation			$ 1,600,000
Goodwill percent expected to be deductible for income tax purposes	50.00%			50.00%		50.00%
Acquiree net revenue	$ 14,000
City Center Holdings L L C | Affiliated Entity | Aria and Vdara
Business Acquisition [Line Items]
Proceeds from sale of Aria and Vdara real estate assets		$ 3,890,000

Acquisition - Purchase Price Al

Acquisition - Purchase Price Allocation (Details) - City Center Holdings L L C $ in Thousands	Sep. 27, 2021USD ($)
Business Acquisition [Line Items]
Cash and cash equivalents	$ 335,396
Receivables and other current assets	106,417
Property and equipment - real estate assets held for sale	3,888,431
Property and equipment	320,826
Trademarks	180,000
Goodwill	1,399,484
Other assets	13,924
Accounts payable, accrued liabilities, and other current liabilities	(200,974)
Debt	(1,729,451)
Other liabilities	(64,054)
Total assets acquired and liabilities assumed	$ 4,250,000

Acquisition - Pro Forma Financi

Acquisition - Pro Forma Financial Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Business Combination and Asset Acquisition [Abstract]
Net revenues	$ 7,096,711	$ 3,911,327
Net income attributable to MGM Resorts International	$ 291,469	$ (600,236)

Investments in and Advances t_3

Investments in and Advances to Unconsolidated Affiliates - Schedule of Investments in and Advances to Unconsolidated Affiliates (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	$ 941,145	$ 1,447,043
City Center
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest		50.00%
Investments in and advances to unconsolidated affiliates	$ 0	$ 441,893
MGP BREIT Venture
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest	50.10%	50.10%
Investments in and advances to unconsolidated affiliates	$ 815,399	$ 810,066
BetMGM
Schedule Of Equity Method Investments [Line Items]
Percentage ownership interest	50.00%	50.00%
Investments in and advances to unconsolidated affiliates	$ 22,983	$ 27,310
Other
Schedule Of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated affiliates	$ 102,763	$ 167,774

Investments in and Advances t_4

Investments in and Advances to Unconsolidated Affiliates - Schedule of Share of Net Income (Loss) From Unconsolidated Affiliates (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Equity Method Investments and Joint Ventures [Abstract]
Income (loss) from unconsolidated affiliates	$ 35,111	$ 20,635	$ 92,870	$ 48,030
Non-operating items from unconsolidated affiliates	(23,421)	(23,604)	(67,473)	(79,986)
Net income from unconsolidated affiliates	$ 11,690	$ (2,969)	$ 25,397	$ (31,956)

Investments in and Advances t_5

Investments in and Advances to Unconsolidated Affiliates - Schedule of Share of Income (Loss) From Unconsolidated Affiliates (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule Of Equity Method Investments [Line Items]
Income from unconsolidated affiliates	$ 35,111	$ 20,635	$ 92,870	$ 48,030
City Center
Schedule Of Equity Method Investments [Line Items]
Income from unconsolidated affiliates	40,747	(6,041)	128,127	(24,489)
MGP BREIT Venture
Schedule Of Equity Method Investments [Line Items]
Income from unconsolidated affiliates	38,959	38,976	116,876	97,787
BetMGM
Schedule Of Equity Method Investments [Line Items]
Income from unconsolidated affiliates	(49,060)	(9,057)	(154,275)	(24,976)
Other
Schedule Of Equity Method Investments [Line Items]
Income from unconsolidated affiliates	$ 4,465	$ (3,243)	$ 2,142	$ (292)

Investments in and Advances t_6

Investments in and Advances to Unconsolidated Affiliates - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended		9 Months Ended
	Jun. 30, 2021	Apr. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Schedule Of Equity Method Investments [Line Items]
Distributions from unconsolidated affiliates					$ 9,245	$ 63,578
City Center Holdings L L C
Schedule Of Equity Method Investments [Line Items]
Distribution paid		$ 101,000
MGP BREIT Venture
Schedule Of Equity Method Investments [Line Items]
Distributions from unconsolidated affiliates			$ 24,000	$ 23,000	70,000	58,000
BetMGM
Schedule Of Equity Method Investments [Line Items]
Contributions to unconsolidated affiliates			$ 50,000	$ 25,000	$ 150,000	55,000
City Center
Schedule Of Equity Method Investments [Line Items]
Distributions from unconsolidated affiliates		$ 51,000
Distributions from unconsolidated affiliates, percentage		50.00%
Harmon Land | City Center Holdings L L C
Schedule Of Equity Method Investments [Line Items]
Consideration received from sale of discontinued operations	$ 80,000
Recognized gain on sale, unconsolidated affiliates and reversal of basis differences	30,000
Harmon Land | City Center
Schedule Of Equity Method Investments [Line Items]
Distributions from unconsolidated affiliates	$ 15,000
Distributions from unconsolidated affiliates, percentage	50.00%
Consideration received from sale of discontinued operations	$ 50,000
Recognized gain on sale, unconsolidated affiliates and reversal of basis differences	$ 35,000
Other
Schedule Of Equity Method Investments [Line Items]
Other-than-temporary impairment charges						$ 64,000

Intangible Assets, Goodwill a_2

Intangible Assets, Goodwill and Other - Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill And Intangible Assets [Line Items]
Goodwill	$ 3,484,966	$ 2,091,278	$ 2,084,564
Indefinite-lived intangible assets:
Indefinite-lived intangible assets	857,336	677,336
Finite-Lived Intangible Assets, Net [Abstract]
Total finite-lived intangible assets, net	2,811,771	2,966,412
Total other intangible assets, net	3,669,107	3,643,748
MGM Grand Paradise gaming subconcession
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	4,522,623	4,541,990
Less: Accumulated amortization	(1,823,362)	(1,697,481)
Total finite-lived intangible assets, net	2,699,261	2,844,509
MGM National Harbor and MGM Springfield gaming licenses
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	106,600	106,600
Less: Accumulated amortization	(24,432)	(19,102)
Total finite-lived intangible assets, net	82,168	87,498
Other finite-lived intangible assets
Finite-Lived Intangible Assets, Net [Abstract]
Finite-lived intangible assets, gross	65,207	60,649
Less: Accumulated amortization	(34,865)	(26,244)
Total finite-lived intangible assets, net	30,342	34,405
Detroit development rights
Indefinite-lived intangible assets:
Indefinite-lived intangible assets	98,098	98,098
MGM Northfield Park and Empire City racing and gaming licenses
Indefinite-lived intangible assets:
Indefinite-lived intangible assets	280,000	280,000
Trademarks and other
Indefinite-lived intangible assets:
Indefinite-lived intangible assets	$ 479,238	$ 299,238

Intangible Assets, Goodwill a_3

Intangible Assets, Goodwill and Other - Goodwill by Segment (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020	Sep. 27, 2021
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 2,091,278	$ 2,084,564
Acquisitions	1,399,484	0
Currency exchange	(5,796)	6,714
Goodwill, ending balance	3,484,966	2,091,278
City Center Holdings L L C
Goodwill [Roll Forward]
Ownership interest acquired			50.00%
Las Vegas Strip Resorts
Goodwill [Roll Forward]
Goodwill, beginning balance	30,452	30,452
Acquisitions	1,399,484	0
Currency exchange	0	0
Goodwill, ending balance	1,429,936	30,452
Regional Operations
Goodwill [Roll Forward]
Goodwill, beginning balance	701,463	701,463
Acquisitions	0	0
Currency exchange	0	0
Goodwill, ending balance	701,463	701,463
MGM China
Goodwill [Roll Forward]
Goodwill, beginning balance	1,359,363	1,352,649
Acquisitions	0	0
Currency exchange	(5,796)	6,714
Goodwill, ending balance	$ 1,353,567	$ 1,359,363

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended
	Mar. 31, 2019	Sep. 27, 2021
MGM Grand Paradise gaming subconcession | Government of Macau
Goodwill [Line Items]
Payment for intangible assets	$ 25
MGM Grand Paradise gaming subconcession | SJMSA
Goodwill [Line Items]
Payment for intangible assets	$ 2
City Center Holdings L L C
Goodwill [Line Items]
Ownership interest acquired		50.00%

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Long-term debt, gross	$ 12,715,126		$ 12,480,586
Less: Premiums, discounts, and unamortized debt issuance costs, net	(96,213)		(103,902)
Long-term debt	12,618,913		12,376,684
Less: Current portion	(1,000,000)		0
Long-term debt, net	11,618,913		12,376,684
Operating Partnership Senior Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross	0		10,000
MGM China First Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross	$ 264,574		770,034
7.75% senior notes, due 2022
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	7.75%
Senior notes	$ 1,000,000		1,000,000
6% senior notes, due 2023
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	6.00%
Senior notes	$ 1,250,000		1,250,000
5.625% Operating Partnership senior notes, due 2024
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	5.625%
Senior notes	$ 1,050,000		1,050,000
5.375% MGM China senior notes, due 2024
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	5.375%
Senior notes	$ 750,000		750,000
6.75% senior notes, due 2025
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	6.75%
Senior notes	$ 750,000		750,000
5.75% senior notes, due 2025
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	5.75%
Senior notes	$ 675,000		675,000
4.625% Operating Partnership senior notes, due 2025
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	4.625%
Senior notes	$ 800,000		800,000
5.25% MGM China senior notes, due 2025
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	5.25%
Senior notes	$ 500,000		500,000
5.875% MGM China senior notes, due 2026
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	5.875%
Senior notes	$ 750,000		750,000
4.5% Operating Partnership senior notes, due 2026
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	4.50%
Senior notes	$ 500,000		500,000
4.625% senior notes, due 2026
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	4.625%
Senior notes	$ 400,000		400,000
5.75% Operating Partnership senior notes, due 2027
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	5.75%
Senior notes	$ 750,000		750,000
5.5% senior notes, due 2027
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	5.50%
Senior notes	$ 675,000		675,000
4.75% MGM China senior notes, due 2027
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	4.75%	4.75%
Senior notes	$ 750,000		0
4.5% Operating Partnership senior notes, due 2028
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	4.50%
Senior notes	$ 350,000		350,000
4.75% senior notes, due 2028
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	4.75%
Senior notes	$ 750,000		750,000
3.875% Operating Partnership senior notes, due 2029
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	3.875%
Senior notes	$ 750,000		750,000
7% debentures, due 2036
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	7.00%
Senior notes	$ 552		$ 552

Long-Term Debt - Additional Inf

Long-Term Debt - Additional Information (Detail) - USD ($)	1 Months Ended
	Mar. 31, 2021	Sep. 30, 2021	Sep. 27, 2021	Feb. 28, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Credit facility amount		$ 12,715,126,000			$ 12,480,586,000
Fair value of interest rate swaps designated as cash flow hedges recorded as liability		31,000,000			41,000,000
Fair value of interest rate swaps designated as cash flow hedges recorded as current liability		4,000,000			1,000,000
Fair value of interest rate swaps designated as cash flow hedges recorded as long-term liability		27,000,000			40,000,000
Fair value of interest rate swaps not designated as cash flow hedges recorded as liability		33,000,000			78,000,000
Fair value of interest rate swaps not designated as cash flow hedges recorded as current liability		11,000,000			31,000,000
Fair value of interest rate swaps not designated as cash flow hedges recorded as long-term liability		22,000,000			47,000,000
Long-term debt, fair value		$ 13,400,000,000			$ 13,200,000,000
City Center Holdings L L C
Debt Instrument [Line Items]
Long term debt assumed in acquisition			$ 1,729,451,000
4.75% MGM China senior notes, due 2027
Debt Instrument [Line Items]
Long-term debt, principal amount	$ 750,000,000
Long-term debt, interest rate (as a percent)	4.75%	4.75%
Long term debt, issued price percentage	99.97%
Operating Partnership Senior Credit Facility | Interest Rate Swap
Debt Instrument [Line Items]
Notional amount		$ 900,000,000
Operating Partnership Senior Credit Facility | Interest Rate Swap | Cash Flow Hedges
Debt Instrument [Line Items]
Weighted average fixed interest rate		1.783%
Notional amount		$ 700,000,000
Revolving Credit Facility | Operating Partnership Senior Credit Facility
Debt Instrument [Line Items]
Line of credit facility drawn		0
Credit facility amount		1,350,000,000
Unsecured Revolving Credit Facility | MGM China First Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility capacity		1,250,000,000
Unsecured Revolving Credit Facility | MGM China Second Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility capacity		500,000,000
Line of credit facility drawn		0
Line of credit facility, current borrowing capacity		400,000,000
Term Loan | MGM China First Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility drawn		$ 265,000,000
Debt instrument, weighted average interest rate		2.81%
Senior Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility capacity		$ 1,500,000,000
Line of credit facility drawn		$ 0
Minimum liquidity level (not less than)				$ 1,000,000,000

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended	9 Months Ended			12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 26, 2022	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2021
Income Tax Disclosure [Line Items]
Effective income tax rate provision (benefit)	17.40%	(11.30%)		16.90%		(8.90%)
Income tax expense	$ 282,135,000	$ (76,734,000)		$ 222,263,000		$ (84,668,000)
Cash tax payments				0
Macau Taxing Authority
Income Tax Disclosure [Line Items]
Decrease in foreign tax credit carry forward valuation allowance	10,000,000			$ 5,000,000
Special gaming tax rate				35.00%
Income tax expense	$ 3,000,000			$ 3,000,000	$ 1,000,000
Marina District Development Company, LLC
Income Tax Disclosure [Line Items]
Unrecognized tax benefits reversed				$ 30,000,000
MGM Grand Paradise SA | Macau Taxing Authority
Income Tax Disclosure [Line Items]
Complementary tax rate on distributions of gaming profits				12.00%
Annual fee payments					$ 1,000,000
MGM Grand Paradise SA | Scenario Forecast | Macau Taxing Authority
Income Tax Disclosure [Line Items]
Annual fee payments			$ 1,000,000				$ 2,000,000

Leases - Additional Information

Leases - Additional Information (Detail) $ in Millions	Mar. 01, 2021USD ($)	Dec. 01, 2020USD ($)	Feb. 14, 2020renewal_period	Nov. 15, 2019renewal_period	Sep. 30, 2021USD ($)renewal_period
Blackstone real estate income trust | Aria and Vdara
Leases [Line Items]
Lease rolling period					5 years
Lease succeeding period					1 year
Blackstone real estate income trust | Las Vegas Strip Resorts | Bellagio BREIT Venture
Leases [Line Items]
Lease agreement initial lease term				30 years
Number of renewal periods, exercisable at option | renewal_period				2
Lease agreement renewal period				10 years
Annual rent escalator from year one through year ten				2.00%
Annual rent escalator from year eleven through year twenty				2.00%
Annual rent escalator cap from year eleven through year twenty				3.00%
Annual rent escalator after year twenty				4.00%
Annual rent | $		$ 250
MGP BREIT Venture | Mandalay Bay and MGM Grand Las Vegas
Leases [Line Items]
Lease agreement initial lease term			30 years
Number of renewal periods, exercisable at option | renewal_period			2
Lease agreement renewal period			10 years
Annual rent | $	$ 298
Annual rent escalator from year one through year fifteen			2.00%
Annual rent escalator after year fifteen			2.00%
Annual rent escalator cap after year fifteen			3.00%
Affiliated Entity | Aria and Vdara
Leases [Line Items]
Lease agreement initial lease term					30 years
Number of renewal periods, exercisable at option | renewal_period					3
Lease agreement renewal period					10 years
Annual rent | $					$ 215
Annual rent escalator from year one through year fifteen					2.00%
Annual rent escalator after year fifteen					2.00%
Annual rent escalator cap after year fifteen					3.00%

Leases - Schedule of Components

Leases - Schedule of Components of Lease Costs (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Leases [Line Items]
Operating lease cost, primarily classified within "General and administrative"	$ 201,265	$ 199,166	$ 599,219	$ 551,807
Interest expense	1,186	(5,990)	134	(19,796)
Amortization expense	17,785	17,851	53,271	52,495
Total finance lease costs	18,971	11,861	53,405	32,699
Bellagio BREIT Venture
Leases [Line Items]
Operating lease cost, primarily classified within "General and administrative"	83,000	83,000	248,000	248,000
Mandalay Bay and MGM Grand Las Vegas
Leases [Line Items]
Operating lease cost, primarily classified within "General and administrative"	$ 99,000	$ 99,000	$ 296,000	$ 248,000

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Balance Sheet Information Related to Leases (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Operating leases
Operating lease right-of-use assets, net	$ 11,551,415	$ 8,286,694
Operating lease liabilities - current, classified within "Other accrued liabilities"	31,632	31,843
Operating lease liabilities - long-term	11,775,109	8,390,117
Total operating lease liabilities	$ 11,806,741	$ 8,421,960
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other accrued liabilities	Other accrued liabilities
Finance leases
Finance lease right-of-use assets, net classified within "Property and equipment, net"	$ 168,886	$ 200,980
Finance lease liabilities - current, classified within "Other accrued liabilities"	84,298	80,193
Finance lease liabilities - long-term, classified within "Other long-term obligations"	91,879	134,287
Total finance lease liabilities	$ 176,177	$ 214,480
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property and equipment, net	Property and equipment, net
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other accrued liabilities	Other accrued liabilities
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other long-term obligations	Other long-term obligations
Weighted-average remaining lease term
Operating leases	29 years	30 years
Finance leases	2 years	3 years
Weighted-average discount rate (%)
Operating leases	7.00%	8.00%
Finance leases	3.00%	3.00%
Bellagio BREIT Venture
Operating leases
Operating lease right-of-use assets, net	$ 3,600,000	$ 3,700,000
Operating lease liabilities - long-term	3,800,000	3,800,000
Mandalay Bay and MGM Grand Las Vegas
Operating leases
Operating lease right-of-use assets, net	4,000,000	4,000,000
Operating lease liabilities - long-term	$ 4,100,000	$ 4,100,000

Leases - Schedule of Cash Paid

Leases - Schedule of Cash Paid for Amounts Included in Measurement of Lease Liabilities and ROU Assets Obtained in Exchange for New Lease Liabilities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash paid for amounts included in the measurement of lease liabilities
Operating cash outflows from operating leases	$ 483,031	$ 421,932
Operating cash outflows from finance leases	3,685	1,741
Financing cash outflows from finance leases	55,815	19,514
ROU assets obtained in exchange for new lease liabilities
Operating leases	3,388,103	4,120,312
Finance leases	$ 21,081	$ 175,446

Leases - Schedule of Maturities

Leases - Schedule of Maturities of Lease Liabilities (Detail) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Operating Leases
2021 (excluding the nine months ended September 30, 2021)	$ 187,052
2022	836,616
2023	849,198
2024	863,096
2025	876,445
Thereafter	27,580,105
Total future minimum lease payments	31,192,512
Less: Amount of lease payments representing interest	(19,385,771)
Total operating lease liabilities	11,806,741	$ 8,421,960
Less: Current portion	(31,632)	(31,843)
Long-term portion of lease liabilities	11,775,109	8,390,117
Finance Leases
2021 (excluding the nine months ended September 30, 2021)	24,688
2022	81,942
2023	72,871
2024	1,029
2025	514
Thereafter	0
Total future minimum lease payments	181,044
Less: Amount of lease payments representing interest	(4,867)
Total finance lease liabilities	176,177	214,480
Less: Current portion	(84,298)	(80,193)
Long-term portion of lease liabilities	$ 91,879	$ 134,287

Commitments and Contingencies (

Commitments and Contingencies (Detail)	9 Months Ended
	Sep. 30, 2021USD ($)
Blackstone real estate income trust
Loss Contingencies [Line Items]
Guarantee obligation amount	$ 3,010,000,000
MGP BREIT Venture
Loss Contingencies [Line Items]
Guarantee obligation amount	$ 3,000,000,000
Guarantee term	twelve years
Percentage of principal amount outstanding guaranteed	10.00%
MGP Senior Credit Facility
Loss Contingencies [Line Items]
Credit facility outstanding	$ 0
Senior Credit Facility
Loss Contingencies [Line Items]
Credit facility outstanding	33,000,000
Letters of credit | MGP Senior Credit Facility
Loss Contingencies [Line Items]
Line of credit facility capacity	75,000,000
Letters of credit | Senior Credit Facility
Loss Contingencies [Line Items]
Line of credit facility capacity	850,000,000
MGM Grand Paradise SA | Extension Agreement
Loss Contingencies [Line Items]
Guarantee obligation amount	$ 102,000,000

Income Per Share of Common St_3

Income Per Share of Common Stock - Schedule of Diluted Weighted-Average Number of Common and Common Equivalent Shares Adjustments for Potential Dilution of Share-Based Awards Outstanding (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Numerator:
Net income (loss) attributable to MGM Resorts International	$ 1,350,433	$ (534,731)	$ 1,123,357	$ (585,119)
Adjustment related to redeemable noncontrolling interests	(7,580)	1,777	(54,019)	42,028
Net income (loss) available to common stockholders – basic	1,342,853	(532,954)	1,069,338	(543,091)
Other	0	(25)	0	(21)
Net income (loss) attributable to common stockholders - diluted	$ 1,342,853	$ (532,979)	$ 1,069,338	$ (543,112)
Denominator:
Weighted-average common shares outstanding – basic (in shares)	478,405	493,517	487,509	494,126
Potential dilution from share-based awards (in shares)	5,810	0	5,675	0
Weighted-average common and common equivalent shares – diluted (in shares)	484,215	493,517	493,184	494,126
Antidilutive share-based awards excluded from the calculation of diluted earnings per share (in shares)	77	6,183	32	5,143

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	Mar. 15, 2021	Nov. 03, 2021	Mar. 31, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Feb. 29, 2020	May 31, 2018
Stockholders Equity Note [Line Items]
Cash proceeds for redemption						$ 50,828,000	$ 3,205,000
Repurchases of common stock				$ 686,533,000		$ 1,026,194,000	$ 353,720,000
Common Stock
Stockholders Equity Note [Line Items]
Repurchases of common stock (in shares)				17,210,000		25,942,000	10,861,000
Repurchases of common stock				$ 172,000		$ 259,000	$ 109,000
Share Repurchase Program One | Common Stock
Stockholders Equity Note [Line Items]
Authorized amount of stock repurchase									$ 2,000,000,000
Share Repurchase Program Two | Common Stock
Stockholders Equity Note [Line Items]
Authorized amount of stock repurchase								$ 3,000,000,000
Repurchase of common stock, remaining amount				$ 2,000,000,000		$ 2,000,000,000
Share Repurchase Program | Common Stock
Stockholders Equity Note [Line Items]
Repurchases of common stock (in shares)				17,000,000	0	26,000,000	11,000,000
Average stock repurchased price (in dollars per share)				$ 39.89		$ 39.56	$ 32.57
Repurchases of common stock				$ 687,000,000		$ 1,000,000,000	$ 354,000,000
Subsequent Event
Stockholders Equity Note [Line Items]
Quarterly dividends (in dollars per share)		$ 0.0025
Subsequent Event | Share Repurchase Program | Common Stock
Stockholders Equity Note [Line Items]
Repurchases of common stock (in shares)		2,000,000
Average stock repurchased price (in dollars per share)		$ 44.51
Repurchases of common stock		$ 80,000,000
MGM Growth Properties LLC | Operating Partnership
Stockholders Equity Note [Line Items]
Partnership interest	42.10%		42.10%
Operating partnership units redeemed (in shares)			37,000,000
Operating partnership units redeemed for cash (in shares)			15,000,000
Operating partnership units redeemed for Class A offering (in shares)			22,000,000
Cash proceeds for redemption			$ 1,200,000,000
MGM Growth Properties LLC | Class A shares
Stockholders Equity Note [Line Items]
New issuance of common stock (in shares)	22,000,000			100,000		3,000,000
MGM Growth Properties LLC | Class A shares | Operating Partnership
Stockholders Equity Note [Line Items]
Partnership interest				41.60%		41.60%

Stockholders' Equity - Schedule

Stockholders' Equity - Schedule of Changes in Accumulated Other Comprehensive Loss Attributable to MGM Resorts International by Component (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	$ 11,104,122	$ 12,348,782	$ 11,179,908	$ 12,662,919
Other comprehensive income (loss)	(4,715)	90	5,462	(61,485)
Other changes in accumulated other comprehensive income (loss):
Ending Balance	11,660,977	$ 11,702,662	11,660,977	11,702,662
MGM Growth Properties LLC | Class A Shareholders
Other changes in accumulated other comprehensive income (loss):
MGP Class A share issuances	271		759,535	$ 507,551
Currency Translation Adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	8,844		12,964
Other comprehensive income (loss) before reclassifications	(11,956)		(19,167)
Amounts reclassified from accumulated other comprehensive loss to interest expense	0		0
Other comprehensive income (loss)	(11,956)		(19,167)
Other changes in accumulated other comprehensive income (loss):
Redemption of Operating Partnership units			0
Other			0
Changes in accumulated other comprehensive loss:	(11,956)		(19,167)
Other comprehensive loss (income) attributable to noncontrolling interest	5,270		8,361
Ending Balance	2,158		2,158
Currency Translation Adjustments | MGM Growth Properties LLC | Class A Shareholders
Other changes in accumulated other comprehensive income (loss):
MGP Class A share issuances	0		0
Cash Flow Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(47,826)		(55,357)
Other comprehensive income (loss) before reclassifications	1,818		7,824
Amounts reclassified from accumulated other comprehensive loss to interest expense	5,423		16,805
Other comprehensive income (loss)	7,241		24,629
Other changes in accumulated other comprehensive income (loss):
Redemption of Operating Partnership units			0
Other			0
Changes in accumulated other comprehensive loss:	7,241		24,629
Other comprehensive loss (income) attributable to noncontrolling interest	(4,656)		(14,513)
Ending Balance	(45,241)		(45,241)
Cash Flow Hedges | MGM Growth Properties LLC | Class A Shareholders
Other changes in accumulated other comprehensive income (loss):
MGP Class A share issuances	0		0
Other
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	17,809		11,716
Other comprehensive income (loss) before reclassifications	0		0
Amounts reclassified from accumulated other comprehensive loss to interest expense	0		0
Other comprehensive income (loss)	0		0
Other changes in accumulated other comprehensive income (loss):
Redemption of Operating Partnership units			5,327
Other			(2,473)
Changes in accumulated other comprehensive loss:	1		6,094
Other comprehensive loss (income) attributable to noncontrolling interest	0		0
Ending Balance	17,810		17,810
Other | MGM Growth Properties LLC | Class A Shareholders
Other changes in accumulated other comprehensive income (loss):
MGP Class A share issuances	1		3,240
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning Balance	(21,173)		(30,677)
Other comprehensive income (loss) before reclassifications	(10,138)		(11,343)
Amounts reclassified from accumulated other comprehensive loss to interest expense	5,423		16,805
Other comprehensive income (loss)	(4,715)		5,462
Other changes in accumulated other comprehensive income (loss):
Redemption of Operating Partnership units			5,327
Other			(2,473)
Changes in accumulated other comprehensive loss:	(4,714)		11,556
Other comprehensive loss (income) attributable to noncontrolling interest	614		(6,152)
Ending Balance	(25,273)		(25,273)
Total | MGM Growth Properties LLC | Class A Shareholders
Other changes in accumulated other comprehensive income (loss):
MGP Class A share issuances	$ 1		$ 3,240

Segment Information - Schedule

Segment Information - Schedule of Segment Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net revenue
Revenues	$ 2,707,539	$ 1,125,920	$ 6,623,248	$ 3,668,546
Other operating income (expense)
Preopening and start-up expenses	(1,547)	(11)	(1,642)	(51)
Property transactions, net	(3,677)	(4,116)	(842)	(85,440)
Depreciation and amortization	(279,403)	(294,363)	(853,579)	(911,859)
Gain on REIT transactions, net	0	0	0	1,491,945
Gain on consolidation of CityCenter, net	1,562,329	0	1,562,329	0
October 1 litigation settlement	0	0	0	(49,000)
Restructuring	0	0	0	(19,882)
Triple-net operating lease and ground lease rent expense	(191,622)	(189,602)	(570,851)	(521,087)
Gain related to sale of Harmon land - unconsolidated affiliate	0	0	49,755	0
Income from unconsolidated affiliates related to real estate ventures	41,669	41,687	125,007	106,756
Operating income (loss)	1,892,782	(495,182)	1,909,852	(278,866)
Non-operating income (expense)
Interest expense, net of amounts capitalized	(200,049)	(173,808)	(598,116)	(487,701)
Non-operating items from unconsolidated affiliates	(23,421)	(23,604)	(67,473)	(79,986)
Other, net	(49,241)	13,889	70,302	(102,054)
Non-operating income (expense)	(272,711)	(183,523)	(595,287)	(669,741)
Income (loss) before income taxes	1,620,071	(678,705)	1,314,565	(948,607)
Benefit (provision) for income taxes	(282,135)	76,734	(222,263)	84,668
Net income (loss)	1,337,936	(601,971)	1,092,302	(863,939)
Less: Net loss attributable to noncontrolling interests	12,497	67,240	31,055	278,820
Net income (loss) attributable to MGM Resorts International	1,350,433	(534,731)	1,123,357	(585,119)
Chief Executive Officer
Other operating income (expense)
CEO transition expense	0	0	0	(44,401)
Reportable segments
Net revenue
Revenues	2,595,149	1,085,111	6,319,299	3,489,737
Adjusted Property EBITDAR
Reportable segment Adjusted Property EBITDAR	889,778	64,413	1,968,388	128,922
Reportable segments | Las Vegas Strip Resorts
Net revenue
Revenues	1,380,967	481,418	2,930,499	1,766,035
Adjusted Property EBITDAR
Reportable segment Adjusted Property EBITDAR	534,548	15,125	1,039,472	178,277
Reportable segments | Regional Operations
Net revenue
Revenues	925,123	556,826	2,492,756	1,371,750
Adjusted Property EBITDAR
Reportable segment Adjusted Property EBITDAR	348,234	145,734	908,564	185,369
Reportable segments | MGM China
Net revenue
Revenues	289,059	46,867	896,044	351,952
Adjusted Property EBITDAR
Reportable segment Adjusted Property EBITDAR	6,996	(96,446)	20,352	(234,724)
Corporate and other
Net revenue
Revenues	112,390	40,809	303,949	178,809
Other operating income (expense)
Corporate and other, net	(124,745)	(113,190)	(368,713)	(374,769)
Casino
Net revenue
Revenues	1,400,337	690,218	3,835,094	1,907,893
Casino | Reportable segments | Las Vegas Strip Resorts
Net revenue
Revenues	422,541	189,358	1,008,108	527,059
Casino | Reportable segments | Regional Operations
Net revenue
Revenues	719,630	464,789	2,024,149	1,078,596
Casino | Reportable segments | MGM China
Net revenue
Revenues	252,445	35,297	784,984	298,995
Rooms
Net revenue
Revenues	490,460	175,450	1,053,907	641,024
Rooms | Reportable segments | Las Vegas Strip Resorts
Net revenue
Revenues	403,010	137,869	846,053	526,838
Rooms | Reportable segments | Regional Operations
Net revenue
Revenues	70,766	34,782	160,269	94,842
Rooms | Reportable segments | MGM China
Net revenue
Revenues	16,683	2,800	47,585	19,344
Food and beverage
Net revenue
Revenues	416,478	126,317	876,556	552,797
Food and beverage | Reportable segments | Las Vegas Strip Resorts
Net revenue
Revenues	308,522	81,429	614,572	391,218
Food and beverage | Reportable segments | Regional Operations
Net revenue
Revenues	92,148	38,646	211,661	138,052
Food and beverage | Reportable segments | MGM China
Net revenue
Revenues	15,808	6,240	50,323	23,451
Entertainment, retail and other
Net revenue
Revenues	315,693	101,618	639,926	420,132
Entertainment, retail and other | Reportable segments | Las Vegas Strip Resorts
Net revenue
Revenues	246,894	72,762	461,766	320,920
Entertainment, retail and other | Reportable segments | Regional Operations
Net revenue
Revenues	42,579	18,609	96,677	60,260
Entertainment, retail and other | Reportable segments | MGM China
Net revenue
Revenues	$ 4,123	$ 2,530	$ 13,152	$ 10,162

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	Aug. 04, 2021	Apr. 01, 2021	Mar. 31, 2021	Oct. 31, 2021	Mar. 31, 2021	Sep. 30, 2021	Sep. 30, 2020	Mar. 15, 2021
Related Party Transaction [Line Items]
Cash proceeds for redemption						$ 50,828	$ 3,205
VICI Properties, Inc
Related Party Transaction [Line Items]
Annual rent payments under master lease of properties	$ 860,000
Shares newly issued ( in shares)	1.366
Cash consideration	$ 4,400,000
Ownership interest	$ 370,000
VICI Properties, Inc | MGP
Related Party Transaction [Line Items]
Fixed exchange ratio (in dollars per share)	$ 43
Real Estate Assets and Leases | Blackstone real estate income trust | Bellagio BREIT Venture
Related Party Transaction [Line Items]
Partnership interest						5.00%
MGP | Blackstone real estate income trust | Lease Agreements
Related Party Transaction [Line Items]
Partnership interest						50.10%
MGM Growth Properties LLC | Operating Partnership
Related Party Transaction [Line Items]
Operating partnership units redeemed (in shares)					37,000,000
Cash proceeds for redemption					$ 1,200,000
Partnership interest			42.10%		42.10%			42.10%
Master Lease
Related Party Transaction [Line Items]
Annual rent payments under master lease of properties		$ 843,000	$ 828,000
Fixed annual rent escalator percentage		2.00%
Master Lease | Subsequent Event
Related Party Transaction [Line Items]
Annual rent payments under master lease of properties				$ 30,000
Cash consideration for acquisition				400,000
Fixed annual rent				$ 27,000
Increase in annual rent per year (in percentage)				2.00%