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BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - 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
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Numerator:      
Net income (loss) attributable to MGM Resorts International $ 1,473,093 $ 1,254,370 $ (1,032,724)
Adjustment related to redeemable noncontrolling interests (31,888) (78,298) 35,520
Net income (loss) available to common stockholders - basic 1,441,205 1,176,072 (997,204)
Net income (loss) available to common stockholders - diluted $ 1,441,205 $ 1,176,072 $ (997,204)
Denominator:      
Weighted average common shares outstanding basic 409,201 481,930 494,152
Potential dilution from stock-based awards 3,792 5,426 0
Weighted average common and common equivalent shares - diluted 412,993 487,356 494,152
Antidilutive stock-based awards excluded from the calculation of diluted earnings per share 603 198 9,493