Line Of Credit Facility, Maximum Borrowing Capacity, Increase

No definition available.

Name:	mgm_LineOfCreditFacilityMaximumBorrowingCapacityIncrease
Namespace Prefix:	mgm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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Balance Type:	na
Period Type:	instant

- 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.

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+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

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+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

+ References

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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LONG-TERM DEBT - Additional Information (Details)	1 Months Ended			9 Months Ended
LONG-TERM DEBT - Additional Information (Details)	Aug. 31, 2023 USD ($)	Mar. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Oct. 31, 2023 USD ($)	Oct. 31, 2023 HKD ($)	Sep. 30, 2023 HKD ($)	Aug. 31, 2023 HKD ($)	Dec. 31, 2022 USD ($)
Debt Instrument [Line Items]
Redemption of debt				$ 1,285,600,000	$ 1,000,000,000
Long-term debt, fair value				$ 6,200,000,000						$ 8,400,000,000
6% senior notes, due 2023
Debt Instrument [Line Items]
Redemption of debt		$ 1,250,000,000
Long-term debt, interest rate (in percent)		6.00%		6.00%				6.00%
7.75% senior notes, due 2022
Debt Instrument [Line Items]
Redemption of debt			$ 1,000,000,000
Long-term debt, interest rate (in percent)			7.75%
Senior Notes \| LeoVegas senior notes, due 2023
Debt Instrument [Line Items]
Redemption of debt	$ 36,000,000
Revolving Credit Facility \| Senior Credit Facility
Debt Instrument [Line Items]
Line of credit facility				$ 1,675,000,000
Line of credit facility drawn				0
Term Loan \| MGM China first revolving credit facility
Debt Instrument [Line Items]
Line of credit facility				$ 1,200,000,000				$ 9,750,000,000
Debt instrument, weighted average interest rate (in percent)				8.66%				8.66%
Unsecured Revolving Credit Facility \| MGM China second revolving credit facility
Debt Instrument [Line Items]
Line of credit facility				$ 425,000,000				$ 3,325,000,000
Line of credit facility drawn				0
Line of credit facility, current borrowing capacity				$ 747,000,000				$ 5,850,000,000
Line of credit facility, maximum borrowing capacity, increase	$ 26,000,000								$ 205,000,000
Unsecured Revolving Credit Facility \| MGM China second revolving credit facility \| Subsequent Event
Debt Instrument [Line Items]
Line of credit facility						$ 574,000,000	$ 4,495,000,000
Line of credit facility, maximum borrowing capacity, increase						$ 149,000,000	$ 1,170,000,000