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STOCKHOLDERS’ EQUITY - Summary of Net Income Attributable to and Transfers from Noncontrolling Interest, Which Shows Effects of Changes in Company's Ownership Interest in a Subsidiary (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Stockholders Equity Note [Line Items]      
Net income attributable to MGM Resorts International $ 1,142,180 $ 1,473,093 $ 1,254,370
Transfers from/(to) noncontrolling interest:      
Redemption of MGP OP units 0 0 176,659
Deconsolidation of MGP   (3,173,626)  
Other 0 (120) (5,062)
Net transfers from noncontrolling interest 0 10,964 274,771
Change from net income attributable to MGM Resorts International and transfers to noncontrolling interest 1,142,180 1,484,057 1,529,141
AOCI Including Portion Attributable to Noncontrolling Interest      
Transfers from/(to) noncontrolling interest:      
Deconsolidation of MGP 0 11,084 0
MGM Growth Properties LLC | Class A shares      
Transfers from/(to) noncontrolling interest:      
MGP Class A share issuances $ 0 $ 0 $ 103,174