Income Taxes	9 Months Ended
Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income Taxes	NOTE 5 — INCOME TAXES For interim income tax reporting the Company estimates its annual effective tax rate and applies it to its year-to-date ordinary income. The tax effects of unusual or infrequently occurring items, including changes in judgment about valuation allowances and effects of changes in tax laws or rates, are reported in the interim period in which they occur. The Company’s effective income tax rate was a benefit of 11.3% and 8.9% for the three and nine months ended September 30, 2020, respectively, compared to a benefit of 620.8% and a provision of 33.9% for the three and nine months ended September 30, 2019, respectively. The Company recognizes deferred income tax assets, net of applicable reserves, related to net operating losses, tax credit carryforwards and certain temporary differences. The Company recognizes future tax benefits to the extent that realization of such benefit is more likely than not. Otherwise, a valuation allowance is applied. Due to the impact of COVID-19 on its business operations, the Company increased its valuation allowance for its foreign tax credits (“FTCs”) by $1 million and $28 million in the three and nine months ended September 30, 2020, respectively, and increased its valuation allowance for Macau deferred tax assets by $25 million in the nine months ended September 30, 2020, with corresponding increases to provision for income taxes in each period. In addition, during the nine months ended September 30, 2020, the Company recorded an income tax benefit of $6 million resulting from recently issued guidance related to deductions for employee dining facilities and income tax expense of $349 million related to the MGP BREIT Venture Transaction that closed on February 14, 2020. The Company's FTCs are attributable to the Macau Special Gaming Tax, which is 35% of gross gaming revenue in Macau. Significant judgment is required in assessing the need for a valuation allowance and future changes to assumptions used in this assessment could result in material changes in the valuation allowance with a corresponding impact on the provision for income taxes in the period including such change. On March 30, 2020, MGM Grand Paradise was granted an extension of its exemption from the Macau 12% complementary tax on gaming profits through June 26, 2022, concurrent with the end of the term of its gaming subconcession. The prior exemption was set to expire on March 31, 2020. The Company previously re-measured its net deferred tax liability for MGM Grand Paradise during 2019 assuming it would receive the complementary tax exemption extension through June 26, 2022 as a result of required non-discriminatory treatment among gaming concessionaires and sub-concessionaires under Macanese law. As a result, no additional remeasurement is required for the three and nine months ended September 30, 2020. The Company continues to assume that MGM Grand Paradise will pay the Macau 12% complementary tax on gaming profits for all periods beyond June 26, 2022 and has factored that assumption into the measurement of Macau deferred tax assets and liabilities. MGM Grand Paradise’s exemption from the 12% complementary tax on gaming profits does not apply to dividend distributions of such profits to MGM China. MGM Grand Paradise has an agreement with the Macau government to settle the 12% complementary tax that would otherwise be due by its shareholder, MGM China, on distributions of its gaming profits by paying a flat annual payment (“annual fee arrangement”) regardless of the amount of distributable dividends. Such annual fee arrangement covers the distributions of gaming profits earned for the period of January 1, 2017 through March 31, 2020. MGM Grand Paradise has applied for an extension of the annual fee arrangement to cover distributions of gaming profits to be earned through June 26, 2022. Until the extension is granted, the 12% complementary tax will accrue on distributions of gaming profits earned after March 31, 2020; however, no amounts are accrued for the three and nine months ended September 30, 2020 since MGM Grand Paradise is generating losses due to the impact of COVID-19.

Income Taxes

9 Months Ended

Sep. 30, 2020

NOTE 5 — INCOME TAXES

For interim income tax reporting the Company estimates its annual effective tax rate and applies it to its year-to-date ordinary income. The tax effects of unusual or infrequently occurring items, including changes in judgment about valuation allowances and effects of changes in tax laws or rates, are reported in the interim period in which they occur. The Company’s effective income tax rate was a benefit of 11.3% and 8.9% for the three and nine months ended September 30, 2020, respectively, compared to a benefit of 620.8% and a provision of 33.9% for the three and nine months ended September 30, 2019, respectively.

The Company recognizes deferred income tax assets, net of applicable reserves, related to net operating losses, tax credit carryforwards and certain temporary differences. The Company recognizes future tax benefits to the extent that realization of such benefit is more likely than not. Otherwise, a valuation allowance is applied.

Due to the impact of COVID-19 on its business operations, the Company increased its valuation allowance for its foreign tax credits (“FTCs”) by $1 million and $28 million in the three and nine months ended September 30, 2020, respectively, and increased its valuation allowance for Macau deferred tax assets by $25 million in the nine months ended September 30, 2020, with corresponding increases to provision for income taxes in each period. In addition, during the nine months ended September 30, 2020, the Company recorded an income tax benefit of $6 million resulting from recently issued guidance related to deductions for employee dining facilities and income tax expense of $349 million related to the MGP BREIT Venture Transaction that closed on February 14, 2020.

The Company's FTCs are attributable to the Macau Special Gaming Tax, which is 35% of gross gaming revenue in Macau. Significant judgment is required in assessing the need for a valuation allowance and future changes to assumptions used in this assessment could result in material changes in the valuation allowance with a corresponding impact on the provision for income taxes in the period including such change.

On March 30, 2020, MGM Grand Paradise was granted an extension of its exemption from the Macau 12% complementary tax on gaming profits through June 26, 2022, concurrent with the end of the term of its gaming subconcession. The prior exemption was set to expire on March 31, 2020. The Company previously re-measured its net deferred tax liability for MGM Grand Paradise during 2019 assuming it would receive the complementary tax exemption extension through June 26, 2022 as a result of required non-discriminatory treatment among gaming concessionaires and sub-concessionaires under Macanese law. As a result, no additional remeasurement is required for the three and nine months ended September 30, 2020. The Company continues to assume that MGM Grand Paradise will pay the Macau 12% complementary tax on gaming profits for all periods beyond June 26, 2022 and has factored that assumption into the measurement of Macau deferred tax assets and liabilities.

MGM Grand Paradise’s exemption from the 12% complementary tax on gaming profits does not apply to dividend distributions of such profits to MGM China. MGM Grand Paradise has an agreement with the Macau government to settle the 12% complementary tax that would otherwise be due by its shareholder, MGM China, on distributions of its gaming profits by paying a flat annual payment (“annual fee arrangement”) regardless of the amount of distributable dividends. Such annual fee arrangement covers the distributions of gaming profits earned for the period of January 1, 2017 through March 31, 2020. MGM Grand Paradise has applied for an extension of the annual fee arrangement to cover distributions of gaming profits to be earned through June 26, 2022. Until the extension is granted, the 12% complementary tax will accrue on distributions of gaming profits earned after March 31, 2020; however, no amounts are accrued for the three and nine months ended September 30, 2020 since MGM Grand Paradise is generating losses due to the impact of COVID-19.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

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