XML 79 R61.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Investments in and Advances to Unconsolidated Affiliates - Tabular Disclosure of Differences between Share of Venture-Level Equity and Investment Balances (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Schedule Of Equity Method Investments [Line Items] |  |
Venture-level equity attributable to the Company | $ 961,787 | $ 2,981,550
Other adjustments | 5,257 | 49,698
Investment balance | 967,044 | 1,447,043
City Center |  |
Schedule Of Equity Method Investments [Line Items] |  |
Adjustment to CityCenter equity upon contribution of net assets by MGM resorts International | 0 | (504,171)
CityCenter capitalized interest | 0 | 168,966
CityCenter completion guarantee | 0 | 248,730
CityCenter deferred gain | 0 | (208,204)
CityCenter capitalized interest on sponsor notes | 0 | (33,010)
Other-than-temporary impairments of investment | 0 | (1,256,516)
Investment balance | 0 | $ 441,893
Land | City Center |  |
Schedule Of Equity Method Investments [Line Items] |  |
Other-than-temporary impairments of investment | $ 352,000 |

X
- Definition The item represents the difference between the amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and the amount of underlying equity in net assets the reporting Entity has in the investee attributable to interest capitalized during the unconsolidated affiliate's development and construction stages. + References No definition available. + Details
Name: | mgm_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityCapitalizedInterest
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The item represents the difference between the amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and the amount of underlying equity in net assets the reporting Entity has in the investee attributable to the entity's completion guarantee obligations. + References No definition available. + Details
Name: | mgm_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityCompletionGuarantee
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Equity​ method investment difference between carrying ​amount and underlying equity contribution attributable to capitalized interest from loans to the affiliate. + References No definition available. + Details
Name: | mgm_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityContribution
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Equity method investment difference between carrying amount and underlying equity deferred gain. + References No definition available. + Details
Name: | mgm_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityDeferredGain
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The item represents the difference between the amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and the amount of underlying equity in net assets the reporting Entity has in the investee attributable to net assets contributed by the entity. + References No definition available. + Details
Name: | mgm_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityNetAssetsContributed
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The item represents the difference between the amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and the amount of underlying equity in net assets the reporting Entity has in the investee attributable to other adjustments not otherwise specified. + References No definition available. + Details
Name: | mgm_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityOtherAdjustments
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The item represents the difference between the amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and the amount of underlying equity in net assets the reporting Entity has in the investee attributable to the write-down of investment. + References No definition available. + Details
Name: | mgm_EquityMethodInvestmentDifferenceBetweenCarryingAmountAndUnderlyingEquityWriteDownOfInvestment
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the entity's ownership percentage in the investee multiplied by the investee's total equity. + 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)(3) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
Name: | us-gaap_EquityMethodInvestmentUnderlyingEquityInNetAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of investment in equity method investee and investment in and advance to affiliate. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LandMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |