XML 47 R30.htm IDEA: XBRL DOCUMENT v3.22.1

ORGANIZATION - Additional Information (Detail) - vote	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
MGP BREIT Venture
Organization Disclosure [Line Items]
Percentage ownership interest	50.10%	50.10%
Bellagio BREIT Venture
Organization Disclosure [Line Items]
Percentage of minority interest	5.00%
Bellagio BREIT Venture | Subsidiary of Blackstone Real Estate Income Trust
Organization Disclosure [Line Items]
Percentage of ownership interest	95.00%
MGP BREIT Venture
Organization Disclosure [Line Items]
Percentage of minority interest	49.90%
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%
Class A shares | Non-Guarantor MGP Subsidiaries
Organization Disclosure [Line Items]
Common stock, number of votes per share	1

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

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

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

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

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

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

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_MGPBREITVentureMember
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:	srt_OwnershipAxis=mgm_SubsidiaryOfBlackstoneRealEstateIncomeTrustMember
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:	dei_LegalEntityAxis=mgm_MGMGrowthPropertiesLimitedLiabilityCompanyMember
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_NonGuarantorMGPSubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: