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Goodwill - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Aug. 22, 2023 | Nov. 01, 2022 | Sep. 26, 2022 | Dec. 31, 2021
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill | $ 899.9 | $ 723.8 |  |  |  | $ 366.8
Additions | 177.1 | 357.0 |  |  |  |
Gaming | Operating Segments |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill | 290.3 | 290.3 |  |  |  | 161.2
Additions | 0.0 | 129.1 |  |  |  |
Live and Historical Racing | Operating Segments |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill | 376.2 | 280.3 |  |  |  | 52.4
Additions | 95.9 | 227.9 |  |  |  |
TwinSpires | Operating Segments |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill | 233.4 | 152.2 |  |  |  | $ 152.2
Additions | 81.2 | $ 0.0 |  |  |  |
Ellis Park |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill |  |  |  |  | $ 9.2 |
P2E Transaction |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill |  |  |  | $ 347.8 |  |
P2E Transaction | Gaming |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill |  |  |  | 129.1 |  |
P2E Transaction | Live and Historical Racing |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill |  |  |  | $ 218.7 |  |
Exacta Systems |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Goodwill | 177.1 |  | $ 177.1 |  |  |
Exacta Systems | Live and Historical Racing | Operating Segments |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Additions | 95.9 |  |  |  |  |
Exacta Systems | TwinSpires | Operating Segments |  |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |  |
Additions | $ 81.2 |  |  |  |  |

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