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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Schedule of Changes in Accumulated Other Comprehensive Loss Attributable to MGM Resorts International by Component | Changes in accumulated other comprehensive loss attributable to MGM Resorts International are as follows:
|  | Currency Translation Adjustments |  |  | Cash Flow Hedges |  |  | Other |  |  | Total |
|  | (In thousands) |
Balances, January 1, 2018 |  | $ | (11,450 | ) |  | $ | 6,668 |  |  | $ | 1,172 |  |  | $ | (3,610 | )
Other comprehensive income (loss) before reclassifications |  |  | (13,022 | ) |  |  | 4,706 |  |  |  | — |  |  |  | (8,316 | )
Amounts reclassified from accumulated other comprehensive loss to interest expense |  |  | — |  |  |  | (1,130 | ) |  |  | — |  |  |  | (1,130 | )
Other comprehensive income (loss), net of tax |  |  | (13,022 | ) |  |  | 3,576 |  |  |  | — |  |  |  | (9,446 | )
Other comprehensive (income) loss attributable to noncontrolling interest |  |  | 5,600 |  |  |  | (1,100 | ) |  |  | — |  |  |  | 4,500 |
Balances, December 31, 2018 |  |  | (18,872 | ) |  |  | 9,144 |  |  |  | 1,172 |  |  |  | (8,556 | )
Other comprehensive income (loss) before reclassifications |  |  | 28,870 |  |  |  | (28,783 | ) |  |  | — |  |  |  | 87 |
Amounts reclassified from accumulated other comprehensive loss to interest expense |  |  | — |  |  |  | (5,599 | ) |  |  | — |  |  |  | (5,599 | )
Amounts reclassified from accumulated other comprehensive loss related to de-designation of interest rate swaps to "Other, net" |  |  | — |  |  |  | 4,877 |  |  |  | — |  |  |  | 4,877 |
Other comprehensive income (loss), net of tax |  |  | 28,870 |  |  |  | (29,505 | ) |  |  | — |  |  |  | (635 | )
Other changes in accumulated other comprehensive loss: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Empire City MGP transaction |  |  | — |  |  |  | — |  |  |  | 195 |  |  |  | 195 |
MGP Class A share issuances |  |  | — |  |  |  | — |  |  |  | 1,512 |  |  |  | 1,512 |
Park MGM Transaction |  |  | — |  |  |  | — |  |  |  | 16 |  |  |  | 16 |
Northfield OpCo transaction |  |  | — |  |  |  | — |  |  |  | (2 | ) |  |  | (2 | )
Other |  |  | — |  |  |  | — |  |  |  | 481 |  |  |  | 481 |
Changes in accumulated other comprehensive loss |  |  | 28,870 |  |  |  | (29,505 | ) |  |  | 2,202 |  |  |  | 1,567 |
Other comprehensive (income) loss attributable to noncontrolling interest |  |  | (12,745 | ) |  |  | 9,532 |  |  |  | — |  |  |  | (3,213 | )
Balances, December 31, 2019 |  |  | (2,747 | ) |  |  | (10,829 | ) |  |  | 3,374 |  |  |  | (10,202 | )
Other comprehensive income (loss) before reclassifications |  |  | 27,762 |  |  |  | (94,740 | ) |  |  | — |  |  |  | (66,978 | )
Amounts reclassified from accumulated other comprehensive loss to interest expense |  |  | — |  |  |  | 17,922 |  |  |  | — |  |  |  | 17,922 |
Amounts reclassified from accumulated other comprehensive loss to "Other, net" |  |  | — |  |  |  | (2,547 | ) |  |  | — |  |  |  | (2,547 | )
Other comprehensive income (loss), net of tax |  |  | 27,762 |  |  |  | (79,365 | ) |  |  | — |  |  |  | (51,603 | )
Other changes in accumulated other comprehensive loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
MGP Class A share issuances |  |  | — |  |  |  | — |  |  |  | 646 |  |  |  | 646 |
MGP BREIT Venture Transaction |  |  | — |  |  |  | — |  |  |  | (59 | ) |  |  | (59 | )
Redemption of Operating Partnership units |  |  | — |  |  |  | — |  |  |  | 8,773 |  |  |  | 8,773 |
Other |  |  | — |  |  |  | — |  |  |  | (1,018 | ) |  |  | (1,018 | )
Changes in accumulated other comprehensive loss |  |  | 27,762 |  |  |  | (79,365 | ) |  |  | 8,342 |  |  |  | (43,261 | )
Other comprehensive (income) loss attributable to noncontrolling interest |  |  | (12,051 | ) |  |  | 34,837 |  |  |  | — |  |  |  | 22,786 |
Balances, December 31, 2020 |  | $ | 12,964 |  |  | $ | (55,357 | ) |  | $ | 11,716 |  |  | $ | (30,677 | )
Summary of Net Income Attributable to and Transfers from Noncontrolling Interest, Which Shows Effects of Changes in Company's Ownership Interest in a Subsidiary | The following is a summary of net income attributable to MGM Resorts International and transfers to noncontrolling interest, which shows the effects of changes in the Company’s ownership interest in a subsidiary on the equity attributable to the Company:
|  | For the Years Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | (In thousands) |
Net income (loss) attributable to MGM Resorts International |  | $ | (1,032,724 | ) |  | $ | 2,049,146 |  |  | $ | 466,772 |
Transfers from/(to) noncontrolling interest: |  |  |  |  |  |  |  |  |  |  |  |
MGP Class A share issuances |  |  | 64,834 |  |  |  | 151,976 |  |  |  | — |
MGP BREIT Venture Transaction |  |  | (6,562 | ) |  |  | — |  |  |  | — |
Redemption of Operating Partnership units |  |  | 92,632 |  |  |  | — |  |  |  | — |
Empire City MGP transaction |  |  | — |  |  |  | (18,718 | ) |  |  | — |
Park MGM Transaction |  |  | — |  |  |  | (1,968 | ) |  |  | — |
Northfield OpCo transaction |  |  | — |  |  |  | 21,679 |  |  |  | — |
Other |  |  | (1,759 | ) |  |  | (935 | ) |  |  | (5,667 | )
Net transfers from/(to) noncontrolling interest |  |  | 149,145 |  |  |  | 152,034 |  |  |  | (5,667 | )
Change from net income attributable to MGM Resorts International and transfers to noncontrolling interest |  | $ | (883,579 | ) |  | $ | 2,201,180 |  |  | $ | 461,105 |

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