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EARNINGS PER SHARE - Schedule of Diluted Weighted-Average Number of Common and Common Equivalent Shares Adjustments for Potential Dilution of Share-Based Awards Outstanding (Detail) - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Numerator:    
Net income (loss) attributable to MGM Resorts International $ 466,807 $ (18,016)
Adjustment related to redeemable noncontrolling interests 1,297 (8,986)
Net income (loss) attributable to common stockholders, basic 468,104 (27,002)
Net income (loss) attributable to common stockholders, diluted $ 468,104 $ (27,002)
Denominator:    
Weighted-average common shares outstanding – basic (in shares) 374,085 442,916
Potential dilution from share-based awards (in shares) 4,010 0
Weighted-average common and common equivalent shares – diluted (in shares) 378,095 442,916
Antidilutive share-based awards excluded from the calculation of diluted earnings per share (in shares) 276 6,687