| **Acquisitions - Additional Information (Details) - USD ($) $ in Millions** |        |        | 12 Months Ended |         |         |
|-----------------------------------------------------------------------------|--------|--------|-----------------|---------|---------|
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| **Business Acquisition [Line Items]**                                       |   |   |            |    |    |
| Goodwill                                                                    |   |   | $ 723.8         | $ 899.9 | $ 366.8 |
| Ellis Park                                                                  |   |   |            |    |    |
| **Business Acquisition [Line Items]**                                       |   |   |            |    |    |
| Consideration to be paid                                                    | $ 79.0 |   |            |    |    |
| Working capital and other purchase price adjustments                        | 3.5    |   |            |    |    |
| Cash acquired in the acquisition                                            | 1.4    |   |            |    |    |
| Property and equipment                                                      | 19.3   |   |            |    |    |
| Goodwill                                                                    | 9.2    |   |            |    |    |
| Working capital                                                             | 1.6    |   |            |    |    |
| Gaming rights intangible asset                                              |   |   | 47.4            |    |    |
| Ellis Park | Gaming Rights                                                  |   |   |            |    |    |
| **Business Acquisition [Line Items]**                                       |   |   |            |    |    |
| Other intangible assets                                                     | 47.4   |   |            |    |    |
| Ellis Park | Trademarks                                                     |   |   |            |    |    |
| **Business Acquisition [Line Items]**                                       |   |   |            |    |    |
| Other intangible assets                                                     | $ 3.6  |   |            |    |    |
| Gaming rights intangible asset                                              |   |   | $ 3.6           |    |    |
| Chasers Poker Room                                                          |   |   |            |    |    |
| **Business Acquisition [Line Items]**                                       |   |   |            |    |    |
| Gaming rights intangible asset                                              |   | $ 82.2 |            |    |    |

| X                                                                                                                                                                                                                                                                                                                                                                                             |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net Working Capital
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| - Definition
Business Combination, Working Capital And Other Purchase Price Adjustments
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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 currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.
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| - Definition
Amount of intangible assets, excluding goodwill, acquired at the acquisition date.
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| - Definition
The amount of property, plant, and equipment recognized as of the acquisition date.
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|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.
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| - Definition
Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, from an acquisition.
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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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