Debt instrument issued price percentage.

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Fair value of interest rate swaps designated as cash flow hedges recorded as current liability.

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Fair value of interest rate swaps designated as cash flow hedges recorded as liability.

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Fair value of interest rate swaps designated as cash flow hedges recorded as long term liability.

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Fair value of interest rate swaps not designated as cash flow hedges recorded as current liability.

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Fair value of interest rate swaps not designated as cash flow hedges recorded as liability.

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Fair value of interest rate swaps not designated as cash flow hedges recorded as long term liability.

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Line of credit facility increased amount of borrowing capacity.

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Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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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.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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

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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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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Face (par) amount of the original debt instrument that was repurchased.

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Weighted average interest rate of debt outstanding.

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Average fixed interest rate related to the group of interest rate derivatives.

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Nominal or face amount used to calculate payment on derivative.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Amount of investment in equity method investee and investment in and advance to affiliate.

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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.

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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.

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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.

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

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The cash outflow to repay long-term debt that is wholly or partially secured by collateral. Excludes repayments of tax exempt secured debt.

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The cash outflow for a long-term debt where the holder has highest claim on the entity's asset in case of bankruptcy or liquidation during the period.

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Long-Term Debt - Additional Information (Detail) - USD ($)		1 Months Ended							12 Months Ended
	Feb. 14, 2020	Mar. 31, 2021	Mar. 31, 2020	Feb. 29, 2020	Dec. 31, 2019	May 31, 2019	Apr. 30, 2019	Feb. 28, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Nov. 30, 2021	Nov. 30, 2020	Oct. 31, 2020	Jun. 30, 2020	May 31, 2020	Jan. 31, 2019
Debt Instrument [Line Items]
Repayment and termination of existing revolving facility									$ 0	$ 846,815,000	$ 3,764,167,000
Loss on debt retirement					$ (171,000,000)	$ (16,000,000)			(37,000)	(126,462,000)	$ (198,151,000)
Credit facility amount									12,860,966,000	12,480,586,000
Notional amount									700,000,000
Fair value of interest rate swaps designated as cash flow hedges recorded as liability									25,000,000	41,000,000
Fair value of interest rate swaps designated as cash flow hedges recorded as current liability									5,000,000	1,000,000
Fair value of interest rate swaps designated as cash flow hedges recorded as long-term liability									20,000,000	40,000,000
Fair value of interest rate swaps not designated as cash flow hedges recorded as liability									27,000,000	78,000,000
Fair value of interest rate swaps not designated as cash flow hedges recorded as current liability									8,000,000	31,000,000
Fair value of interest rate swaps not designated as cash flow hedges recorded as long-term liability									19,000,000	47,000,000
Line of credit facility, increased amount of borrowing capacity									500,000,000
Long-term debt, fair value									13,400,000,000	13,200,000,000
Investments in and advances to unconsolidated affiliates									967,044,000	1,447,043,000
BetMGM
Debt Instrument [Line Items]
Investments in and advances to unconsolidated affiliates									41,060,000	27,310,000		$ 1,675,000,000
Interest Rate Swap
Debt Instrument [Line Items]
Notional amount									$ 900,000,000
Weighted Average fixed interest rate									1.783%
5.75% Operating Partnership senior notes, due 2027
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)									5.75%
4.75% senior notes, due 2028
Debt Instrument [Line Items]
Long-term debt, principal amount														$ 750,000,000
Long-term debt, interest rate (as a percent)									4.75%					4.75%
6.75% Senior Notes, Due 2025
Debt Instrument [Line Items]
Long-term debt, principal amount																$ 750,000,000
Long-term debt, interest rate (as a percent)									6.75%							6.75%
5.75% Senior Notes, Due 2025
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)			5.75%
4.625% senior notes, due 2026
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)			4.625%						4.625%
5.5% Senior Notes, Due 2027
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)			5.50%
5.5% Senior Notes, Due 2027
Debt Instrument [Line Items]
Long-term debt, principal amount							$ 1,000,000,000
Long-term debt, interest rate (as a percent)					5.50%				5.50%		5.50%
3.875% Operating Partnership senior notes, due 2029
Debt Instrument [Line Items]
Long-term debt, principal amount													$ 750,000,000
Long-term debt, interest rate (as a percent)													3.875%
4.625% Operating Partnership senior notes, due 2025
Debt Instrument [Line Items]
Long-term debt, principal amount															$ 800,000,000
Long-term debt, interest rate (as a percent)									4.625%						4.625%
5.25% MGM China senior notes, due 2025
Debt Instrument [Line Items]
Long-term debt, principal amount															$ 500,000,000
Long-term debt, interest rate (as a percent)									5.25%						5.25%
5.375% MGM China Senior Notes, Due 2024
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)									5.375%
5.875% MGM China Senior Notes, Due 2026
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)									5.875%
4.75% MGM China senior notes, due 2027
Debt Instrument [Line Items]
Long-term debt, principal amount		$ 750,000,000
Long-term debt, interest rate (as a percent)		4.75%							4.75%
Debt instrument issued price percentage		99.97%
Senior Notes Due 2020 5.250%
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)					5.25%						5.25%
Redemption of debt					$ 267,000,000		233,000,000
Senior Notes Due 2020 6.750%
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)					6.75%						6.75%
Redemption of debt					$ 361,000,000		$ 639,000,000
Senior Notes Due 2021 6.625%
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)					6.625%						6.625%
Redemption of debt					$ 1,250,000,000
Senior Notes Due 2019 8.625%
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)								8.625%
Redemption of debt								$ 850,000,000
Senior Notes Due 2027 5.75%
Debt Instrument [Line Items]
Long-term debt, principal amount																	$ 750,000,000
Long-term debt, interest rate (as a percent)																	5.75%
MGM China Senior Notes Due 2024 5.375 Percent
Debt Instrument [Line Items]
Long-term debt, principal amount						$ 750,000,000
Long-term debt, interest rate (as a percent)						5.375%
MGM China Senior Notes Due 2026 5.875 Percent
Debt Instrument [Line Items]
Long-term debt, principal amount						$ 750,000,000
Long-term debt, interest rate (as a percent)						5.875%
Operating Partnership Senior Credit Facility
Debt Instrument [Line Items]
Loss on debt retirement				$ (18,000,000)
Operating Partnership Senior Credit Facility \| Term Loan B
Debt Instrument [Line Items]
Repayment of outstanding term loan facility				1,300,000,000
Operating Partnership Senior Credit Facility \| Term Loan A
Debt Instrument [Line Items]
Repayment of outstanding term loan facility				$ 399,000,000
Senior Notes
Debt Instrument [Line Items]
Loss on debt retirement			$ (105,000,000)
Redemption price percentage									100.00%
CityCenter Holdings, LLC
Debt Instrument [Line Items]
Debt									$ 1,729,451,000
Maximum
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount of debt purchased			750,000,000
Maximum \| 5.75% Senior Notes, Due 2025
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount of debt purchased			325,000,000
Maximum \| 4.625% senior notes, due 2026
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount of debt purchased			100,000,000
Maximum \| 5.5% Senior Notes, Due 2027
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount of debt purchased			$ 325,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility amount									1,350,000,000
Revolving Credit Facility \| Operating Partnership Senior Credit Facility
Debt Instrument [Line Items]
Line of credit facility drawn									$ 50,000,000
Debt instrument, interest rate									1.85%
Revolving Credit Facility \| Minimum \| LIBOR \| Operating Partnership Senior Credit Facility
Debt Instrument [Line Items]
Interest rate margin (as a percent)									1.75%
Revolving Credit Facility \| Minimum \| HIBOR \| MGM China First Credit Facility
Debt Instrument [Line Items]
Interest rate margin (as a percent)									1.625%
Revolving Credit Facility \| Maximum \| LIBOR \| Operating Partnership Senior Credit Facility
Debt Instrument [Line Items]
Interest rate margin (as a percent)									2.25%
Revolving Credit Facility \| Maximum \| HIBOR \| MGM China First Credit Facility
Debt Instrument [Line Items]
Interest rate margin (as a percent)									2.75%
Unsecured Revolving Credit Facility \| MGM China First Credit Facility
Debt Instrument [Line Items]
Line of credit facility									$ 1,250,000,000
Unsecured Revolving Credit Facility \| MGM China Second Credit Facility
Debt Instrument [Line Items]
Line of credit facility									400,000,000
Line of credit facility drawn									$ 0
Unsecured Revolving Credit Facility \| Minimum \| HIBOR \| MGM China Second Credit Facility
Debt Instrument [Line Items]
Interest rate margin (as a percent)									1.625%
Unsecured Revolving Credit Facility \| Maximum \| HIBOR \| MGM China Second Credit Facility
Debt Instrument [Line Items]
Interest rate margin (as a percent)									2.75%
MGM China First Credit Facility
Debt Instrument [Line Items]
Credit facility amount									$ 360,414,000	$ 770,034,000
Term Loan \| MGM China First Credit Facility
Debt Instrument [Line Items]
Line of credit facility drawn									$ 360,000,000
Debt instrument, weighted average interest rate									2.95%
Senior Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility									$ 1,675,000,000
Line of credit facility drawn									$ 0
Senior Credit Facility \| Revolving Credit Facility \| MGP BREIT Venture
Debt Instrument [Line Items]
Line of credit facility	$ 1,500,000,000
Senior Credit Facility \| Revolving Credit Facility \| Minimum \| LIBOR
Debt Instrument [Line Items]
Interest rate margin (as a percent)									1.50%
Senior Credit Facility \| Revolving Credit Facility \| Maximum \| LIBOR
Debt Instrument [Line Items]
Interest rate margin (as a percent)									2.25%
Senior Credit Facility \| Unsecured Revolving Credit Facility \| MGP BREIT Venture
Debt Instrument [Line Items]
Repayment and termination of existing revolving facility	1,500,000,000
Loss on debt retirement	$ (4,000,000)