| Cover | 12 Months Ended |
| Dec. 31, 2022 | |
| Document Information [Line Items] | |
| Document Type | DEF 14A |
| Amendment Flag | false |
| Entity Information [Line Items] | |
| Entity Registrant Name | MGM Resorts International |
| Entity Central Index Key | 0000789570 |
| Pay vs Performance Disclosure | 12 Months Ended | ||
| Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | |
| Pay vs Performance Disclosure [Table] | |||
| Pay vs Performance [Table Text Block] | PAY VS. PERFORMANCE TABLE YEAR SUMMARY COMPENSATION TABLE TOTAL FOR PEO ( A SUMMARY TOTAL FOR PEO ( A COMPENSATION PAID TO PEO ( B COMPENSATION PAID TO PEO B AVERAGE TOTAL FOR NON-PEO ( C AVERAGE PAID TO NON-PEO ( B C VALUE OF INITIAL FIXED $100 INVESTMENT BASED ON: NET INCOME ($ ( F RELATIVE ( G TOTAL ( D PEER GROUP TOTAL E 2022 $ 16,238,075 $ — $ 6,386,343 $ — $ 5,467,867 $ 2,842,563 $ 101.61 $ 57.48 $ 206,731 36th 2021 13,274,524 — 29,119,443 — 5,668,010 9,147,716 135.97 77.17 1,208,389 84th 2020 13,988,135 36,180,335 22,190,584 24,162,737 5,440,857 5,270,119 95.44 88.55 (1,319,907 ) 23rd (A) Amounts represent total compensation as reported for Messrs. Hornbuckle and Murren for each corresponding year in the “Total” column of the Summary Compensation Table. Refer to “Executive Compensation—Compensation Tables—Summary Compensation Table.” ( B Amounts represent CAP, as computed in accordance with Item 402(v) of Regulation S-K. Reconciliation of co m MINUS PLUS PLUS/ (MINUS) PLUS PLUS/ MINUS EQUALS YEAR SUMMARY TOTAL REPORTED (1) YEAR END VALUE OF FISCAL YEAR ($) YEAR OVER OF ($) FAIR VESTED THE ($) YEAR OVER FAIR VALUE COMPENSATION PEO (Hornbuckle) 2022 16,238,075 (10,000,000 ) 10,933,421 (7,210,431 ) — (3,574,722 ) — 6,386,343 2021 13,274,524 (8,000,000 ) 8,065,872 12,016,295 — 3,762,752 — 29,119,443 2020 13,988,135 (11,942,950 ) 23,378,267 (367,494 ) — (240,016 ) (2,625,358 ) 22,190,584 PEO (Murren) 2020 36,180,335 (10,870,634 ) — (1,037,152 ) 7,000,000 (612,836 ) (6,496,976 ) 24,162,737 Other Named Executive Officers (Average) 2022 5,467,867 (3,125,000 ) 3,416,725 (2,007,681 ) — (909,348 ) — 2,842,563 2021 5,668,010 (3,209,438 ) 3,489,191 1,883,198 — 1,316,755 — 9,147,716 2020 5,440,857 (2,866,283 ) 4,570,363 (202,976 ) — (115,718 ) (1,556,124 ) 5,270,119 The following information is relevant to the above table. The Reported Value of Equity Awards column includes the values originally reported in the Stock Awards column in the Summary Compensation Table (SCT). Fair value computations with respect to Absolute TSR PSUs and Relative TSR PSUs were computed in accordance with FASB ASC 718 using a Monte Carlo simulation. Fair value computations with respect to RSUs were computed based on the value of MGM stock on the date of computation, i.e., the end of the calendar year, the date of vesting, or the date of forfeiture, as the case may be. Footnote (c) below contains the names of the Named Executive Officers included in the averages. No information is presented in this table with regard to equity awards issued with respect to the annual incentive plan that were reported in the Non-Equity ( C Amounts represent the average of the amounts reported for the Company’s NEOs as a group (excluding Mr. Hornbuckle and Mr. Murren) in the “Total” column of the Summary Compensation Table in each applicable year. The names of each of the NEOs included for purposes of calculating the average amounts in each applicable year are as follows: for 2022 Mr. Halkyard, Mr. Sanders, Mr. McManus and Mr. Fritz; for 2021 Mr. Halkyard, Mr. Sanders, Mr. Mandadi, and Mr. McManus; and for 2020 Mr. Sanders, Mr. McManus, and Mr. Rafiq. ( D Cumulative TSR is calculated by dividing the sum of the cumulative amount of dividends for the measurement period, assuming dividend reinvestment, and the difference between the Company’s share price at the end and the beginning of the measurement period by the Company’s share price at the beginning of the measurement period. ( E Represents the weighted peer group TSR of the companies included in the Dow Jones US Gambling Index. ( F Represents the amount of net income reflected in the Company’s audited financial statements for the applicable year. ( G Based on the S&P500 Constituents as of January 1 of relevant year. | ||
| Company Selected Measure Name | RELATIVETSR | ||
| Named Executive Officers, Footnote [Text Block] | The names of each of the NEOs included for purposes of calculating the average amounts in each applicable year are as follows: for 2022 Mr. Halkyard, Mr. Sanders, Mr. McManus and Mr. Fritz; for 2021 Mr. Halkyard, Mr. Sanders, Mr. Mandadi, and Mr. McManus; and for 2020 Mr. Sanders, Mr. McManus, and Mr. Rafiq. | ||
| Peer Group Issuers, Footnote [Text Block] | Represents the weighted peer group TSR of the companies included in the Dow Jones US Gambling Index. | ||
| Adjustment To PEO Compensation, Footnote [Text Block] | Reconciliation of co m MINUS PLUS PLUS/ (MINUS) PLUS PLUS/ MINUS EQUALS YEAR SUMMARY TOTAL REPORTED (1) YEAR END VALUE OF FISCAL YEAR ($) YEAR OVER OF ($) FAIR VESTED THE ($) YEAR OVER FAIR VALUE COMPENSATION PEO (Hornbuckle) 2022 16,238,075 (10,000,000 ) 10,933,421 (7,210,431 ) — (3,574,722 ) — 6,386,343 2021 13,274,524 (8,000,000 ) 8,065,872 12,016,295 — 3,762,752 — 29,119,443 2020 13,988,135 (11,942,950 ) 23,378,267 (367,494 ) — (240,016 ) (2,625,358 ) 22,190,584 PEO (Murren) 2020 36,180,335 (10,870,634 ) — (1,037,152 ) 7,000,000 (612,836 ) (6,496,976 ) 24,162,737 Other Named Executive Officers (Average) 2022 5,467,867 (3,125,000 ) 3,416,725 (2,007,681 ) — (909,348 ) — 2,842,563 2021 5,668,010 (3,209,438 ) 3,489,191 1,883,198 — 1,316,755 — 9,147,716 2020 5,440,857 (2,866,283 ) 4,570,363 (202,976 ) — (115,718 ) (1,556,124 ) 5,270,119 | ||
| Non-PEO NEO Average Total Compensation Amount | $ 5,467,867 | $ 5,668,010 | $ 5,440,857 |
| Non-PEO NEO Average Compensation Actually Paid Amount | $ 2,842,563 | 9,147,716 | 5,270,119 |
| Adjustment to Non-PEO NEO Compensation Footnote [Text Block] | Reconciliation of co m MINUS PLUS PLUS/ (MINUS) PLUS PLUS/ MINUS EQUALS YEAR SUMMARY TOTAL REPORTED (1) YEAR END VALUE OF FISCAL YEAR ($) YEAR OVER OF ($) FAIR VESTED THE ($) YEAR OVER FAIR VALUE COMPENSATION PEO (Hornbuckle) 2022 16,238,075 (10,000,000 ) 10,933,421 (7,210,431 ) — (3,574,722 ) — 6,386,343 2021 13,274,524 (8,000,000 ) 8,065,872 12,016,295 — 3,762,752 — 29,119,443 2020 13,988,135 (11,942,950 ) 23,378,267 (367,494 ) — (240,016 ) (2,625,358 ) 22,190,584 PEO (Murren) 2020 36,180,335 (10,870,634 ) — (1,037,152 ) 7,000,000 (612,836 ) (6,496,976 ) 24,162,737 Other Named Executive Officers (Average) 2022 5,467,867 (3,125,000 ) 3,416,725 (2,007,681 ) — (909,348 ) — 2,842,563 2021 5,668,010 (3,209,438 ) 3,489,191 1,883,198 — 1,316,755 — 9,147,716 2020 5,440,857 (2,866,283 ) 4,570,363 (202,976 ) — (115,718 ) (1,556,124 ) 5,270,119 | ||
| Compensation Actually Paid vs. Total Shareholder Return [Text Block] | Compensation Actually Paid Versus TSR 2020-2022 | ||
| Compensation Actually Paid vs. Net Income [Text Block] | Compensation Actually Paid Versus Net Income 2020-2022 | ||
| Compensation Actually Paid vs. Company Selected Measure [Text Block] | Compensation Actually Paid Versus One-Year P 50 | ||
| Tabular List [Table Text Block] | Financial Performance Measures The three most important financial performance measures used by the Company to link executive compensation actually paid to the Company’s NEOs, for the most recently completed fiscal year, to the Company’s performance are as follows: • Total Shareholder Return (“TSR”). • Relative TSR, measured with respect to the S&P 500 Index. • Stock Price. | ||
| Total Shareholder Return Amount | $ 101.61 | 135.97 | 95.44 |
| Peer Group Total Shareholder Return Amount | 57.48 | 77.17 | 88.55 |
| Net Income (Loss) | $ 206,731,000 | $ 1,208,389,000 | $ (1,319,907,000) |
| Company Selected Measure Amount | 0.36 | 0.84 | 0.23 |
| Cumulative TSR Footnote [Text Block] | Cumulative TSR is calculated by dividing the sum of the cumulative amount of dividends for the measurement period, assuming dividend reinvestment, and the difference between the Company’s share price at the end and the beginning of the measurement period by the Company’s share price at the beginning of the measurement period. | ||
| Co Selected Measure Name Footnote [Text Block] | Based on the S&P500 Constituents as of January 1 of relevant year. | ||
| Net Income Loss Footnote [Text Block] | Represents the amount of net income reflected in the Company’s audited financial statements for the applicable year. | ||
| Measure [Axis]: 1 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | Total Shareholder Return (“TSR”). | ||
| Measure [Axis]: 2 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | Relative TSR, measured with respect to the S&P 500 Index. | ||
| Measure [Axis]: 3 | |||
| Pay vs Performance Disclosure [Table] | |||
| Measure Name | Stock Price. | ||
| Mr. Hornbuckle [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| PEO Total Compensation Amount | $ 16,238,075 | $ 13,274,524 | $ 13,988,135 |
| PEO Actually Paid Compensation Amount | $ 6,386,343 | $ 29,119,443 | $ 22,190,584 |
| PEO Name | Hornbuckle | Hornbuckle | Hornbuckle |
| Mr. Murren [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| PEO Total Compensation Amount | $ 0 | $ 0 | $ 36,180,335 |
| PEO Actually Paid Compensation Amount | 0 | 0 | $ 24,162,737 |
| PEO Name | Murren | ||
| Mr. Murren [Member] | Stock Awards [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | $ 7,000,000 | ||
| PEO [Member] | Mr. Hornbuckle [Member] | REPORTED VALUE OF EQUITY AWARDS [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (10,000,000) | (8,000,000) | (11,942,950) |
| PEO [Member] | Mr. Hornbuckle [Member] | YEAR END FAIR VALUE OF OUTSTANDING AND UNVESTED EQUITY AWARDS GRANTED DURING FISCAL YEAR [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 10,933,421 | 8,065,872 | 23,378,267 |
| PEO [Member] | Mr. Hornbuckle [Member] | YEAR OVER YEAR CHANGE IN FAIR VALUE OF OUTSTANDING UNVESTED EQUITY AWARDS GRANTED IN PRIOR FISCAL YEARS [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (7,210,431) | 12,016,295 | (367,494) |
| PEO [Member] | Mr. Hornbuckle [Member] | FAIR VALUE AT VESTING DATE OF EQUITY AWARDS GRANTED AND VESTED DURING THE FISCAL YEAR [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 0 | 0 | 0 |
| PEO [Member] | Mr. Hornbuckle [Member] | YEAR OVER YEAR CHANGE IN FAIR VALUE AS OF THE VESTING DATE (FROM THE END OF THE PRIOR FISCAL YEAR) OF EQUITY AWARDS GRANTED IN PRIOR YEARS VESTING DURING THE FISCAL YEAR [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (3,574,722) | 3,762,752 | (240,016) |
| PEO [Member] | Mr. Hornbuckle [Member] | FAIR VALUE AS OF END OF PRIOR FISCAL YEAR OF EQUITY AWARDS GRANTED IN PRIOR FISCAL YEAR THAT FAIL TO MEET THE APPLICABLE VESTING CONDITIONS DURING THE FISCAL YEAR [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 0 | 0 | (2,625,358) |
| PEO [Member] | Mr. Murren [Member] | REPORTED VALUE OF EQUITY AWARDS [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (10,870,634) | ||
| PEO [Member] | Mr. Murren [Member] | YEAR END FAIR VALUE OF OUTSTANDING AND UNVESTED EQUITY AWARDS GRANTED DURING FISCAL YEAR [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 0 | ||
| PEO [Member] | Mr. Murren [Member] | YEAR OVER YEAR CHANGE IN FAIR VALUE OF OUTSTANDING UNVESTED EQUITY AWARDS GRANTED IN PRIOR FISCAL YEARS [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (1,037,152) | ||
| PEO [Member] | Mr. Murren [Member] | FAIR VALUE AT VESTING DATE OF EQUITY AWARDS GRANTED AND VESTED DURING THE FISCAL YEAR [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 7,000,000 | ||
| PEO [Member] | Mr. Murren [Member] | YEAR OVER YEAR CHANGE IN FAIR VALUE AS OF THE VESTING DATE (FROM THE END OF THE PRIOR FISCAL YEAR) OF EQUITY AWARDS GRANTED IN PRIOR YEARS VESTING DURING THE FISCAL YEAR [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (612,836) | ||
| PEO [Member] | Mr. Murren [Member] | FAIR VALUE AS OF END OF PRIOR FISCAL YEAR OF EQUITY AWARDS GRANTED IN PRIOR FISCAL YEAR THAT FAIL TO MEET THE APPLICABLE VESTING CONDITIONS DURING THE FISCAL YEAR [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (6,496,976) | ||
| Non-PEO NEO [Member] | REPORTED VALUE OF EQUITY AWARDS [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (3,125,000) | (3,209,438) | (2,866,283) |
| Non-PEO NEO [Member] | YEAR END FAIR VALUE OF OUTSTANDING AND UNVESTED EQUITY AWARDS GRANTED DURING FISCAL YEAR [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 3,416,725 | 3,489,191 | 4,570,363 |
| Non-PEO NEO [Member] | YEAR OVER YEAR CHANGE IN FAIR VALUE OF OUTSTANDING UNVESTED EQUITY AWARDS GRANTED IN PRIOR FISCAL YEARS [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (2,007,681) | 1,883,198 | (202,976) |
| Non-PEO NEO [Member] | FAIR VALUE AT VESTING DATE OF EQUITY AWARDS GRANTED AND VESTED DURING THE FISCAL YEAR [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | 0 | 0 | 0 |
| Non-PEO NEO [Member] | YEAR OVER YEAR CHANGE IN FAIR VALUE AS OF THE VESTING DATE (FROM THE END OF THE PRIOR FISCAL YEAR) OF EQUITY AWARDS GRANTED IN PRIOR YEARS VESTING DURING THE FISCAL YEAR [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | (909,348) | 1,316,755 | (115,718) |
| Non-PEO NEO [Member] | FAIR VALUE AS OF END OF PRIOR FISCAL YEAR OF EQUITY AWARDS GRANTED IN PRIOR FISCAL YEAR THAT FAIL TO MEET THE APPLICABLE VESTING CONDITIONS DURING THE FISCAL YEAR [Member] | |||
| Pay vs Performance Disclosure [Table] | |||
| Adjustment to Compensation Amount | $ 0 | $ 0 | $ (1,556,124) |
