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INCOME PER SHARE OF COMMON STOCK - 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, 2022
Mar. 31, 2021
Numerator:    
Net loss attributable to MGM Resorts International $ (18,016) $ (331,829)
Adjustment related to redeemable noncontrolling interests (8,986) (9,428)
Net income (loss) attributable to common stockholders, basic (27,002) (341,257)
Net income (loss) attributable to common stockholders, diluted $ (27,002) $ (341,257)
Denominator:    
Weighted-average common shares outstanding – basic (in shares) 442,916 494,864
Potential dilution from share-based awards (in shares) 0 0
Weighted-average common and common equivalent shares – diluted (in shares) 442,916 494,864
Antidilutive share-based awards excluded from the calculation of diluted earnings per share (in shares) 6,687 8,484