XML 63 R45.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Organization (Detail) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  |  |  | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 13, 2021 USD ($) | Sep. 28, 2021 USD ($) | Sep. 26, 2021 USD ($) agreement | Aug. 04, 2021 USD ($) renewal_period $ / shares shares | Dec. 02, 2020 USD ($) $ / shares shares | May 18, 2020 USD ($) $ / shares shares | Feb. 14, 2020 USD ($) shares | Nov. 22, 2019 shares | Nov. 15, 2019 USD ($) | Mar. 31, 2021 USD ($) shares | Feb. 29, 2020 shares | Dec. 31, 2021 USD ($) property vote agreement segment | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 27, 2021 | Sep. 01, 2016 shares
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain on sale of real estate assets |  |  |  |  |  |  |  |  |  |  |  | $ 0 | $ 1,491,945 | $ 2,677,996 |  |
Long term debt |  |  |  |  |  |  |  |  |  |  |  | 12,860,966 | 12,480,586 |  |  |
Payment for purchase of common shares |  |  |  |  |  |  |  |  |  |  |  | 1,753,509 | 353,720 | $ 1,031,534 |  |
Operating partnership units, redeemed | shares |  |  |  |  | 24,000,000 | 30,000,000 |  |  |  |  |  |  |  |  |  |
Cash proceeds for redemption |  |  |  |  | $ 700,000 | $ 700,000 |  |  |  |  |  | $ 50,828 | $ 22,292 |  |  |
Operating partnership redemption per unit | $ / shares |  |  |  |  | $ 29.78 | $ 23.10 |  |  |  |  |  |  |  |  |  |
Number of integrated casino | property |  |  |  |  |  |  |  |  |  |  |  | 2 |  |  |  |
Number of reportable segments | segment |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |
BetMGM |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage ownership interest |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |
The Mirage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Reverse contract termination fee | $ 322,500 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from divestiture of businesses | 1,075,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Entain | BetMGM |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage ownership interest |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |  |  |
CityCenter Holdings, LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating partnership equity interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |
Percentage of membership interest acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |
Cosmopolitan of Las Vegas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  | $ 1,625,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Reverse contract termination fee |  |  | $ 500,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Bellagio B R E I T 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% |  |  |  |
Total consideration received from sale of real estate assets |  |  |  |  |  |  | $ 4,600,000 |  |  |  |  |  |  |  |  |
Cash received from sale of real estate assets |  |  |  |  |  |  | $ 2,500,000 |  |  |  |  |  |  |  |  |
Guarantee obligation amount |  |  |  |  |  |  |  |  |  |  |  | $ 3,000,000 |  |  |  |
Issuance of operating partnership units | shares |  |  |  |  |  |  | 3,000,000 |  |  |  | 3,000,000 |  |  |  |  |
Percentage of issuance of operating partnership units to equity value of consolidated subsidiary |  |  |  |  |  |  | 5.00% |  |  |  |  |  |  |  |  |
Reduction in lease annual rent due to modification |  |  |  |  |  |  | $ 133,000 |  |  |  |  |  |  |  |  |
MGP BREIT Venture | Term Loan B |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long term debt |  |  |  |  |  |  | $ 1,300,000 |  |  |  |  |  |  |  |  |
MGP BREIT Venture | MGP BREIT Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating partnership equity interest |  |  |  |  |  |  | 50.10% |  |  |  |  |  |  |  |  |
Blackstone Real Estate Income Trust |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest |  |  |  |  |  |  |  |  | 5.00% |  |  |  |  |  |  |
Total consideration received from sale of real estate assets |  |  |  |  |  |  |  |  | $ 4,250,000 |  |  |  |  |  |  |
Cash received from sale of real estate assets |  |  |  |  |  |  |  |  | 4,200,000 |  |  |  |  |  |  |
Gain on sale of real estate assets |  |  |  |  |  |  |  |  | 2,700,000 |  |  |  |  |  |  |
Guarantee obligation amount |  |  |  |  |  |  |  |  | $ 3,010,000 |  |  | $ 3,010,000 |  |  |  |
Blackstone Real Estate Income Trust | Class A Shareholders |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares acquired | shares |  |  |  |  |  |  | 5,000,000 |  |  |  |  |  |  |  |  |
Payment for purchase of common shares |  |  |  |  |  |  | $ 150,000 |  |  |  |  |  |  |  |  |
MGM Grand Las Vegas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration received from sale of real estate assets |  |  |  |  |  |  | 2,500,000 |  |  |  |  |  |  |  |  |
Gain on sale of real estate assets |  |  |  |  |  |  | 1,700,000 |  |  |  |  |  |  |  |  |
Carrying value of real estate assets |  |  |  |  |  |  | 733,000 |  |  |  |  |  |  |  |  |
Selling costs |  |  |  |  |  |  | 27,000 |  |  |  |  |  |  |  |  |
Mandalay Bay |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration received from sale of real estate assets |  |  |  |  |  |  | 2,100,000 |  |  |  |  |  |  |  |  |
Gain on sale of real estate assets |  |  |  |  |  |  | (252,000) |  |  |  |  |  |  |  |  |
Carrying value of real estate assets |  |  |  |  |  |  | 2,300,000 |  |  |  |  |  |  |  |  |
Selling costs |  |  |  |  |  |  | $ 10,000 |  |  |  |  |  |  |  |  |
V I C I Properties Inc |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock issued during period, issued for services (in shares) | shares |  |  |  | 1.366 |  |  |  |  |  |  |  |  |  |  |  |
Operating partnership units received | shares |  |  |  | 1.366 |  |  |  |  |  |  |  |  |  |  |  |
Total purchase price |  |  |  | $ 4,400,000 |  |  |  |  |  |  |  |  |  |  |  |
Business combination retaining ownership interest |  |  |  | $ 370,000 |  |  |  |  |  |  |  |  |  |  |  |
Lease agreement Initial lease term |  |  |  | 25 years |  |  |  |  |  |  |  |  |  |  |  |
Number of renewal periods, exercisable at option | renewal_period |  |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |
Annual rent escalating from year one through year ten |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |
Lease agreement renewal period |  |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease, annual rent expense |  |  |  | $ 860,000 |  |  |  |  |  |  |  |  |  |  |  |
Annual rent escalator after year ten |  |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |
Annual rent escalator cap after year ten |  |  |  | 3.00% |  |  |  |  |  |  |  |  |  |  |  |
Decrease in annual rent payment | $ 90,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
V I C I Properties Inc | MGP |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business acquisition, share price | $ / shares |  |  |  | $ 43 |  |  |  |  |  |  |  |  |  |  |  |
Affiliated Entity | Aria and Vdara |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease agreement Initial lease term |  |  |  |  |  |  |  |  |  |  |  | 30 years |  |  |  |
Number of renewal periods, exercisable at option | agreement |  |  |  |  |  |  |  |  |  |  |  | 3 |  |  |  |
Lease agreement renewal period |  |  |  |  |  |  |  |  |  |  |  | 10 years |  |  |  |
Lessee, operating lease, annual rent expense |  |  |  |  |  |  |  |  |  |  |  | $ 215,000 |  |  |  |
Annual rent escalator cap after year fifteen |  |  |  |  |  |  |  |  |  |  |  | 3.00% |  |  |  |
Affiliated Entity | CityCenter Holdings, LLC | Aria and Vdara |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sale of other property, plant, and equipment |  | $ 3,890,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cosmopolitan of Las Vegas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lease agreement Initial lease term |  |  | 30 years |  |  |  |  |  |  |  |  |  |  |  |  |
Number of renewal periods, exercisable at option | agreement |  |  | 3 |  |  |  |  |  |  |  |  |  |  |  |  |
Lease agreement renewal period |  |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |
Lessee, operating lease, annual rent expense |  |  | $ 200,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Annual rent escalator cap after year ten |  |  | 3.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Annual rent escalator cap after year fifteen |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Annual rent escalating from year one through year fifteen |  |  | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiary Of Blackstone Real Estate Income Trust | Bellagio B R E I T Venture |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership interest |  |  |  |  |  |  |  |  |  |  |  | 95.00% |  |  |  |
MGM Growth Properties LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minimum ownership percentage required for majority voting interest |  |  |  |  |  |  |  |  |  |  |  | 30.00% |  |  |  |
Partnership interest |  |  |  |  |  |  |  |  |  |  |  | 41.50% |  |  |  |
Percentage of minority interest |  |  |  |  |  |  |  |  |  |  |  | 58.50% |  |  |  |
Redemptions discount percentage |  |  |  |  |  |  | 3.00% |  |  |  |  |  |  |  |  |
Cash proceeds for redemption |  |  |  |  |  |  | $ 1,400,000 |  |  |  |  |  |  |  |  |
MGM Growth Properties LLC | Operating Partnership |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating partnership units, redeemed | shares |  |  |  |  | 24,000,000 | 30,000,000 |  |  |  | 37,000,000 |  |  |  |  |  |
Cash proceeds for redemption |  |  |  |  | $ 700,000 | $ 700,000 |  |  |  | $ 1,200,000 |  |  |  |  |  |
MGM Growth Properties LLC | Class A shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of operating partnership units | shares |  |  |  |  |  |  |  | 18,000,000 |  |  |  |  |  |  |  |
MGM China |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares acquired | shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 188,100,000
Percentage ownership interest |  |  |  |  |  |  |  |  |  |  |  | 56.00% |  |  |  |
Non-Guarantor MGP Subsidiaries | Class A shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Organization Disclosure [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of votes per share | vote |  |  |  |  |  |  |  |  |  |  |  | 1 |  |  |  |

X
- Definition Annual Rent Escalating From Year One Through Year Fifteen + References No definition available. + Details
Name: | mgm_AnnualRentEscalatingFromYearOneThroughYearFifteen
Namespace Prefix: | mgm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Annual rent escalating from year one through year ten. + References No definition available. + Details
Name: | mgm_AnnualRentEscalatingFromYearOneThroughYearTen
Namespace Prefix: | mgm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Annual rent escalator after year ten. + References No definition available. + Details
Name: | mgm_AnnualRentEscalatorAfterYearTen
Namespace Prefix: | mgm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Annual rent escalator cap after year fifteen. + References No definition available. + Details
Name: | mgm_AnnualRentEscalatorCapAfterYearFifteen
Namespace Prefix: | mgm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Annual rent escalator cap after year ten. + References No definition available. + Details
Name: | mgm_AnnualRentEscalatorCapAfterYearTen
Namespace Prefix: | mgm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Business combination retaining ownership interest. + References No definition available. + Details
Name: | mgm_BusinessCombinationRetainingOwnershipInterest
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Common stock shares acquired. + References No definition available. + Details
Name: | mgm_CommonStockSharesAcquired
Namespace Prefix: | mgm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Common Stock, Voting Rights, Number Of Votes For Each Share + References No definition available. + Details
Name: | mgm_CommonStockVotingRightsNumberOfVotesForEachShare
Namespace Prefix: | mgm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Decrease in annual rent payment. + References No definition available. + Details
Name: | mgm_DecreaseInAnnualRentPayment
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Issuance of operating partnership units. + References No definition available. + Details
Name: | mgm_IssuanceOfOperatingPartnershipUnits
Namespace Prefix: | mgm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lessee, Operating Lease, Annual Rent Expense + References No definition available. + Details
Name: | mgm_LesseeOperatingLeaseAnnualRentExpense
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Minority interest ownership percentage in consolidated subsidiary. + References No definition available. + Details
Name: | mgm_MinorityInterestOwnershipPercentageInConsolidatedSubsidiary
Namespace Prefix: | mgm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Minority interest ownership percentage in unconsolidated affiliate. + References No definition available. + Details
Name: | mgm_MinorityInterestOwnershipPercentageInUnconsolidatedAffiliate
Namespace Prefix: | mgm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of integrated casino. + References No definition available. + Details
Name: | mgm_NumberOfIntegratedCasino
Namespace Prefix: | mgm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of renewal periods, exercisable at option. + References No definition available. + Details
Name: | mgm_NumberOfRenewalPeriodsExercisableAtOption
Namespace Prefix: | mgm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Operating partnership units received. + References No definition available. + Details
Name: | mgm_OperatingPartnershipUnitsReceived
Namespace Prefix: | mgm_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Organization disclosure. + References No definition available. + Details
Name: | mgm_OrganizationDisclosureLineItems
Namespace Prefix: | mgm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Partners capital account available as per agreement for redemptions. + References No definition available. + Details
Name: | mgm_PartnersCapitalAccountAvailableAsPerAgreementForRedemptions
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Partners capital account redemptions discount percentage. + References No definition available. + Details
Name: | mgm_PartnersCapitalAccountRedemptionsDiscountPercentage
Namespace Prefix: | mgm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Partners capital account redemptions per unit. + References No definition available. + Details
Name: | mgm_PartnersCapitalAccountRedemptionsPerUnit
Namespace Prefix: | mgm_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percent interest in a less than hundred percent owned consolidated affiliate. + References No definition available. + Details
Name: | mgm_PercentInterestInALessThanHundredPercentOwnedConsolidatedAffiliate
Namespace Prefix: | mgm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of issuance of operating partnership units to equity value of consolidated subsidiary. + References No definition available. + Details
Name: | mgm_PercentageOfIssuanceOfOperatingPartnershipUnitsToEquityValueOfConsolidatedSubsidiary
Namespace Prefix: | mgm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Reduction in lease rent. + References No definition available. + Details
Name: | mgm_ReductionInLeaseRent
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Required minimum ownership percentage in beneficial ownership to entitle majority of voting power. + References No definition available. + Details
Name: | mgm_RequiredMinimumOwnershipPercentageInBeneficialOwnershipToEntitleMajorityOfVotingPower
Namespace Prefix: | mgm_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Reverse Contract Termination Fee + References No definition available. + Details
Name: | mgm_ReverseContractTerminationFee
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Selling cost of real estate. + References No definition available. + Details
Name: | mgm_SellingCostOfRealEstate
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
Name: | us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionSharePrice
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=116859721&loc=d3e6578-128477 + Details
Name: | us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination. + References No definition available. + Details
Name: | us-gaap_BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=123466204&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
Name: | us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation. + References No definition available. + Details
Name: | us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(9)(a)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 360 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=123605587&loc=d3e23528-158515 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(7)(c)) -URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(14)(d)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 360 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123605564&loc=d3e23439-158514 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(a)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 360 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=123605564&loc=d3e23415-158514 + Details
Name: | us-gaap_GainsLossesOnSalesOfInvestmentRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=124440162&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseRenewalTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599 + Details
Name: | us-gaap_NumberOfReportableSegments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Total change in each class of partners' capital accounts during the year due to redemptions and adjustments to redemption value. All partners include general, limited and preferred partners. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770 + Details
Name: | us-gaap_PartnersCapitalAccountRedemptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The number of units redeemed during the year of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB Topic 4.F) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770 + Details
Name: | us-gaap_PartnersCapitalAccountUnitsRedeemed
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585 + Details
Name: | us-gaap_PaymentsForRepurchaseOfCommonStock
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromDivestitureOfBusinesses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash inflow from the sale of real estate held-for-investment and real estate joint ventures. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromRealEstateAndRealEstateJointVentures
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of cash inflow for the sale of long-lived, physical assets used to produce goods and services and not intended for resale, classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfOtherPropertyPlantAndEquipment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount, before accumulated depreciation, of real estate investment by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. Excludes real estate not held as investment or interest. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 970 -SubTopic 360 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-28(Column E)) -URI http://asc.fasb.org/extlink&oid=120402810&loc=d3e638233-123024 + Details
Name: | us-gaap_RealEstateGrossAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of subsidiary's or equity investee's stock owned by parent company after stock transaction. + References No definition available. + Details
Name: | us-gaap_SaleOfStockPercentageOfOwnershipAfterTransaction
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares issued in lieu of cash for services contributed to the entity. Number of shares includes, but is not limited to, shares issued for services contributed by vendors and founders. + References No definition available. + Details
Name: | us-gaap_StockIssuedDuringPeriodSharesIssuedForServices
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 5A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123419778&loc=SL6759159-111685 + Details
Name: | us-gaap_VariableInterestEntityOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mgm_BetMGMLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=mgm_TheMirageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherOwnershipInterestsByNameAxis=mgm_EntainPLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=mgm_CityCenterHoldingsLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=mgm_CosmopolitanOfLasVegasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mgm_BellagioBREITVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mgm_MGPBREITVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DebtInstrumentAxis=mgm_TermLoanBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=mgm_MGPBREITVentureMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mgm_BlackstoneRealEstateIncomeTrustMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mgm_MGMGrandLasVegasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mgm_MandalayBayMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mgm_VICIPropertiesIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=mgm_MGPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=srt_AffiliatedEntityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=mgm_AriaAndVdaraMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=mgm_CosmopolitanOfLasVegasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=mgm_SubsidiaryOfBlackstoneRealEstateIncomeTrustMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=mgm_MGMGrowthPropertiesLimitedLiabilityCompanyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=mgm_OperatingPartnershipMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_CapitalUnitsByClassAxis=us-gaap_CapitalUnitClassAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=mgm_MGMChinaHoldingsLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=mgm_NonGuarantorMGPSubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |