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Income Per Share of Common Stock (Tables) | 3 Months Ended
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Mar. 31, 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 |
| March 31, |
| 2020 |  |  | 2019 |
| (In thousands) |
Numerator: |  |  |  |  |  |  |
Net income attributable to MGM Resorts International | $ | 806,869 |  |  | $ | 31,297 |
Adjustment related to redeemable noncontrolling interests |  | 8,070 |  |  |  | (3,825 | )
Net income available to common stockholders - basic |  | 814,939 |  |  |  | 27,472 |
Potentially dilutive effect due to MGP and MGM China stock compensation plans |  | — |  |  |  | (52 | )
Net income attributable to common stockholders - diluted | $ | 814,939 |  |  | $ | 27,420 |
Denominator: |  |  |  |  |  |  |
Weighted-average common shares outstanding - basic |  | 495,415 |  |  |  | 534,219 |
Potential dilution from share-based awards |  | 1,569 |  |  |  | 3,287 |
Weighted-average common and common equivalent shares - diluted |  | 496,984 |  |  |  | 537,506 |
Antidilutive share-based awards excluded from the calculation of diluted earnings per share |  | 3,876 |  |  |  | 1,929 |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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