XML 47 R40.htm IDEA: XBRL DOCUMENT v3.20.1

Leases - Additional Information (Detail) - MGP BREIT Venture [Member] - Mandalay Bay and MGM Grand Las Vegas [Member] $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) Renewal_period
Leases [Line Items]
Number of renewal periods, exercisable at option | Renewal_period	2
Lease agreement renewal period	10 years
Initial annual rent | $	$ 292
Percentage of expected lease term of economic useful life	75.00%
Percentage Of present value of future minimum lease payments	90.00%
Lease agreement Initial lease term	30 years
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%

X

- Definition

Annual rent escalator after year fifteen.

+ References

No definition available.

+ Details

Name:	mgm_AnnualRentEscalatorAfterYearFifteen
Namespace Prefix:	mgm_
Data Type:	num: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:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Annual rent escalator from year one through year fifteen.

+ References

No definition available.

+ Details

Name:	mgm_AnnualRentEscalatorFromYearOneThroughYearFifteen
Namespace Prefix:	mgm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Initial annual rent.

+ References

No definition available.

+ Details

Name:	mgm_InitialAnnualRent
Namespace Prefix:	mgm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Leases.

+ References

No definition available.

+ Details

Name:	mgm_LeasesLineItems
Namespace Prefix:	mgm_
Data Type:	xbrli:stringItemType
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

Percentage of expected lease term of economic useful life.

+ References

No definition available.

+ Details

Name:	mgm_PercentageOfExpectedLeaseTermOfEconomicUsefulLife
Namespace Prefix:	mgm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of present value of future minimum lease payments.

+ References

No definition available.

+ Details

Name:	mgm_PercentageOfPresentValueOfFutureMinimumLeasePayments
Namespace Prefix:	mgm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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=77888426&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=77888426&loc=SL77918673-209980

+ Details

Name:	us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Details

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

X

- Details

Name:	us-gaap_SubsegmentsAxis=mgm_MandalayBayAndMGMGrandLasVegasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: