XML 88 R77.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Income Taxes - Schedule of Benefit (Provision) for Income Taxes Attributable to Income (Loss) Before Income Taxes (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Federal: |  |  |  |  |
Current |  |  | $ (4,928) | $ 11,991 | $ (120,980)
Deferred (excluding separate components) |  |  | (537,993) | (143,468) | 204,713
Deferred – change in enacted rates |  |  | 0 | 0 | 987,942
Deferred – valuation allowance |  |  | (20,175) | (19,753) | 101,443
Other noncurrent |  |  | (5,745) | 576 | 1,356
Benefit (provision) for federal income taxes |  |  | (568,841) | (150,654) | 1,174,474
State: |  |  |  |  |
Current |  |  | (22,685) | (12,564) | (6,798)
Deferred (excluding separate components) |  |  | (32,793) | (12,731) | (25,233)
Deferred – operating loss carryforward |  |  | (5,241) | (29,490) | 44,242
Deferred – valuation allowance |  |  | (191) | 41,068 | (40,078)
Other noncurrent |  |  | (1,401) | (1,334) | (3,876)
Provision for state income taxes |  |  | (62,311) | (15,051) | (31,743)
Foreign: |  |  |  |  |
Current |  |  | (2,454) | (2,037) | (470)
Deferred (excluding separate components) |  |  | 44,374 | 63,827 | (40,653)
Deferred – operating loss carryforward |  |  | 32,915 | 30,574 | 4,688
Deferred – valuation allowance |  |  | (76,028) | 23,229 | 21,098
Benefit (provision) for foreign income taxes |  |  | (1,193) | 115,593 | (15,337)
Benefit (provision) for income taxes | $ (92,000) | $ 72,000 | $ (632,345) | $ (50,112) | $ 1,127,394

X
- Definition Deferred federal income tax expense benefit change in enacted rates. + References No definition available. + Details
Name: | mgm_DeferredFederalIncomeTaxExpenseBenefitChangeInEnactedRates
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The component of total income tax expense for the period comprised of increase (decrease) in the entity's federal deferred tax assets and liabilities attributable to continuing operations, excluding operating loss and valuation allowance, as determined by applying the provisions of the applicable enacted tax laws. + References No definition available. + Details
Name: | mgm_DeferredFederalIncomeTaxExpenseBenefitExcludingOperatingLossCarryforwardAndValuationAllowance
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The component of total income tax expense for the period comprised of increase (decrease) in the entity's federal deferred tax assets attributable to changes in the valuation allowance. + References No definition available. + Details
Name: | mgm_DeferredFederalIncomeTaxExpenseBenefitValuationAllowance
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The component of total income tax expense for the period comprised of increase (decrease) in the entity's foreign deferred tax assets and liabilities attributable to continuing operations, excluding operating loss and valuation allowance, as determined by applying the provisions of the applicable enacted tax laws. + References No definition available. + Details
Name: | mgm_DeferredForeignIncomeTaxExpenseBenefitExcludingOperatingLossCarryforwardAndValuationAllowance
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The component of total income tax expense for the period comprised of increase (decrease) during the period in the entity's foreign deferred tax assets and liabilities attributable to operating loss carryforward as determined by applying the provisions of the federally enacted tax laws. + References No definition available. + Details
Name: | mgm_DeferredForeignIncomeTaxExpenseBenefitOperatingLossCarryforward
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The component of total income tax expense for the period comprised of increase (decrease) in the entity's federal deferred tax assets attributable to changes in the valuation allowance. + References No definition available. + Details
Name: | mgm_DeferredForeignIncomeTaxExpenseBenefitValuationAllowance
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The component of total income tax expense for the period comprised of the increase (decrease) in the entity's state and local deferred tax assets and liabilities attributable to continuing operations, excluding operating loss and valuation allowance, as determined by applying the provisions of the applicable enacted tax laws. + References No definition available. + Details
Name: | mgm_DeferredStateAndLocalTaxExpenseBenefitExcludingOperatingLossCarryforwardAndValuationAllowance
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The component of total income tax expense for the period comprised of the increase (decrease) in the entity's state and local deferred tax assets and liabilities attributable to operating loss carryforward as determined by applying the provisions of the applicable enacted tax laws. + References No definition available. + Details
Name: | mgm_DeferredStateAndLocalTaxExpenseBenefitOperatingLossCarryforward
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The component of total income tax expense for the period comprised of the increase (decrease) in the entity's state and local deferred tax assets attributable to changes in the valuation allowance. + References No definition available. + Details
Name: | mgm_DeferredStateAndLocalTaxExpenseBenefitValuationAllowance
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The component of income tax expense for the period representing other noncurrent amounts paid or payable (or refundable) as determined by applying the provisions of enacted federal tax law to the domestic taxable Income or Loss from continuing operations. + References No definition available. + Details
Name: | mgm_OtherNoncurrentFederalTaxExpenseBenefit
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The component of income tax expense for the period representing other noncurrent amounts paid or payable (or refundable) as determined by applying the provisions of enacted state and local tax law to relevant amounts of taxable Income or Loss from continuing operations. + References No definition available. + Details
Name: | mgm_OtherNoncurrentStateAndLocalTaxExpenseBenefit
Namespace Prefix: | mgm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.7) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
Name: | us-gaap_CurrentFederalTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_CurrentForeignTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.7) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 + Details
Name: | us-gaap_CurrentStateAndLocalTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of current and deferred federal income tax expense (benefit) attributable to income (loss) from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319 + Details
Name: | us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of current and deferred foreign income tax expense (benefit) attributable to income (loss) from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
Name: | us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
Name: | us-gaap_IncomeTaxExpenseBenefit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of state and local current and deferred income tax expense (benefit) attributable to continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a)-(b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I.7) -URI http://asc.fasb.org/extlink&oid=116825942&loc=d3e330036-122817 + Details
Name: | us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration