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ACQUISITIONS AND DIVESTITURES - Pro Forma Financial Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2022
Business Combination and Asset Acquisition [Abstract] |  |
Net revenues | $ 3,422,277 | $ 6,542,015
Net income attributable to MGM Resorts International | $ 1,781,930 | $ 1,780,076

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