| **Description of Business - Additional Information (Details) $ in Millions**            |        |        |           |        | 3 Months Ended | 12 Months Ended |        |
|-----------------------------------------------------------------------------------------|--------|--------|-----------|--------|----------------|-----------------|--------|
||
| **Business Acquisition [Line Items]**                                                   |   |   |      |   |           |            |   |   |   |   |
| Number of live and historical racing entertainment venues owned and operated | venue    |   |   |      |   |           |            | 14     |   |   |   |
| Number of states in which entity operates | state                                       |   |   |      |   |           |            | 8      |   |   |   |
| Number of casino gaming properties | property                                           |   |   |      |   |           |            | 9      |   |   |   |
| Number of retail sportbooks | sportsbook                                                |   |   |      |   |           |            | 13     |   |   |   |
| Stock split, conversion ratio                                                           | 2      | 2      |      |   |           |            |   |   |   |   |
| Non-cash impairment charge                                                              |   |   |      |   |           |            | $ 24.6 | $ 38.3 | $ 15.3 |   |
| Number of additional HRM entertainment venues | venue                                   |   |   | 5         |   |           |            |   |   |   |   |
| Presque Isle Downs & Casino                                                         |   |   |      |   |           |            |   |   |   |   |
| **Business Acquisition [Line Items]**                                                   |   |   |      |   |           |            |   |   |   |   |
| Non-cash impairment charge                                                              |   |   |      |   | $ 24.5         |            |   |   |   |   |
| Disposal Group, Held-for-sale, Not Discontinued Operations | Arlington Heights Property |   |   |      |   |           |            |   |   |   |   |
| **Business Acquisition [Line Items]**                                                   |   |   |      |   |           |            |   |   |   |   |
| Area of land sold | a                                                                   |   |   |      |   |           |            |   |   |   | 326 |
| Aggregate consideration                                                                 |   |   |      |   |           |            |   |   |   | $ 197.2 |
| Live and Historical Racing                                                              |   |   |      |   |           |            |   |   |   |   |
| **Business Acquisition [Line Items]**                                                   |   |   |      |   |           |            |   |   |   |   |
| Number of states in which entity operates | state                                       |   |   |      |   |           |            | 3      |   |   |   |
| Non-cash impairment charge                                                              |   |   |      |   |           | $ 11.2          |   |   |   |   |
| Ellis Park                                                                              |   |   |      |   |           |            |   |   |   |   |
| **Business Acquisition [Line Items]**                                                   |   |   |      |   |           |            |   |   |   |   |
| Payments to acquire business                                                            |   |   |      | $ 79.0 |           |            |   |   |   |   |
| P2E Transaction                                                                         |   |   |      |   |           |            |   |   |   |   |
| **Business Acquisition [Line Items]**                                                   |   |   |      |   |           |            |   |   |   |   |
| Purchase price                                                                          |   |   | $ 2,750.0 |   |           |            |   |   |   |   |
| Number of HRM entertainment venues | venue                                              |   |   | 6         |   |           |            |   |   |   |   |
| Payments to acquire business                                                            |   |   | $ 2,835.9 |   |           |            |   |   |   |   |

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Number Of Live And Historical Racing Entertainment Venues
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| - Definition
Area of land held.
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| - Definition
Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.
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| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
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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.
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| - Definition
Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.
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| - Definition
The number of states the entity operates in as of the balance sheet date.
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| - Definition
The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.
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| - Definition
Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.
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