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Acquisitions - Additional Information (Details) - USD ($) $ in Millions |  |  | 1 Months Ended | 3 Months Ended | 5 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Mar. 07, 2019 | Jan. 29, 2019 | Dec. 31, 2024 | Jun. 30, 2019 | Jun. 30, 2019 | Jul. 06, 2018
Business Acquisition [Line Items] |  |  |  |  |  |
Total purchase price | $ 638 |  |  |  |  |
Empire City [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Date of acquisition agreement |  | Jan. 29, 2019 |  |  |  |
Total purchase price |  | $ 865 |  |  |  |
Consideration in form of common stock |  | $ 266 |  |  |  |
Percentage of membership interest acquired |  | 100.00% |  |  |  |
Business acquisition, decrease to the racing and gaming license |  |  |  | $ 76 |  |
Business acquisition, decrease to other intangible assets |  |  |  | 17 |  |
Business acquisition, decrease to deferred income taxes |  |  |  | $ 20 |  |
Revenue |  |  |  |  | $ 91 |
Operating income |  |  |  |  | 9 |
Net income |  |  |  |  | $ 20 |
Empire City [Member] | MGM Growth Properties LLC [Member] | Gaming License And Trade Name |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Estimated useful life of intangible assets |  | 4 years |  |  |  |
Empire City [Member] | MGM Growth Properties LLC [Member] | Customer List [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Estimated useful life of intangible assets |  | 5 years |  |  |  |
Empire City [Member] | Forecast [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Additional contingent consideration payable |  |  | $ 50 |  |  |
Northfield Park associates LLC [Member] | MGM Growth Properties LLC [Member] |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Percentage of membership interest acquired |  |  |  |  |  | 100.00%

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- Definition Business combination recognized adjustment to racing and gaming license. + References No definition available. + Details
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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Date when the business acquisition agreement was executed, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477 + Details
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- Definition Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6613-128477 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109124213&loc=d3e6578-128477 + Details
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- Definition This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition This element represents the amount of any measurement period adjustment (as defined) realized during the reporting period to intangibles acquired in connection with a business combination for which the initial accounting was incomplete. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 4A -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=SL65897772-128472 + Details
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