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Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended			9 Months Ended	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 26, 2022	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2021
Income Tax Disclosure [Line Items]
Effective income tax rate	27.80%	(22.40%)		(19.60%)	(2.90%)
Cash tax payments				$ 0
Marina District Development Company, LLC [Member]
Income Tax Disclosure [Line Items]
Unrecognized tax benefits reversed	$ 20,000,000			$ 30,000,000
MGM Grand Paradise SA [Member]
Income Tax Disclosure [Line Items]
Complementary tax rate on distributions of gaming profits (as a percent)				12.00%
Annual fee payments						$ 1,400,000
Accrued amount	0			$ 0
MGM Grand Paradise SA [Member] \| Scenario Forecast [Member]
Income Tax Disclosure [Line Items]
Annual fee payments			$ 900,000				$ 1,900,000
Macau [Member]
Income Tax Disclosure [Line Items]
Decrease in foreign tax credit carry forward valuation allowance	$ 2,000,000			$ 5,000,000
Special gaming tax rate				35.00%