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Income Per Share of Common Stock (Tables) | 9 Months Ended
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Sep. 30, 2020
Earnings Per Share [Abstract] |
Schedule of Diluted Weighted-Average Number of Common and Common Equivalent Shares Adjustments for Potential Dilution of Share-Based Awards Outstanding | Diluted weighted-average common and common equivalent shares include adjustments for potential dilution of share-based awards outstanding under the Company’s stock compensation plan.
| Three Months Ended |  |  | Nine Months Ended |
| September 30, |  |  | September 30, |
| 2020 |  |  | 2019 |  |  | 2020 |  |  | 2019 |
| (In thousands) |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) attributable to MGM Resorts International | $ | (534,731 | ) |  | $ | (37,133 | ) |  | $ | (585,119 | ) |  | $ | 37,569 |
Adjustment related to redeemable noncontrolling interests |  | 1,777 |  |  |  | (3,074 | ) |  |  | 42,028 |  |  |  | (5,906 | )
Net income (loss) available to common stockholders - basic |  | (532,954 | ) |  |  | (40,207 | ) |  |  | (543,091 | ) |  |  | 31,663 |
Potentially dilutive effect due to MGP and MGM China stock compensation plans |  | (25 | ) |  |  | (30 | ) |  |  | (21 | ) |  |  | (111 | )
Net income (loss) attributable to common stockholders - diluted | $ | (532,979 | ) |  | $ | (40,237 | ) |  | $ | (543,112 | ) |  | $ | 31,552 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted-average common shares outstanding - basic |  | 493,517 |  |  |  | 518,983 |  |  |  | 494,126 |  |  |  | 528,429 |
Potential dilution from share-based awards |  | — |  |  |  | — |  |  |  | — |  |  |  | 3,444 |
Weighted-average common and common equivalent shares - diluted |  | 493,517 |  |  |  | 518,983 |  |  |  | 494,126 |  |  |  | 531,873 |
Antidilutive share-based awards excluded from the calculation of diluted earnings per share |  | 6,183 |  |  |  | 1,108 |  |  |  | 5,143 |  |  |  | 1,816 |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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