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Acquisitions - Exacta Systems (Details) - USD ($) $ in Millions |  | 9 Months Ended |
--- | --- | --- | ---
Aug. 22, 2023 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022
Business Acquisition [Line Items] |  |  |  |
Deferred payments for acquisition of business included in other liabilities |  | $ 6.9 | $ 0.0 |
Goodwill |  | 899.9 |  | $ 723.8
Additions |  | 177.1 |  |
Operating Segments | Live and Historical Racing |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill |  | 376.2 |  | 280.3
Additions |  | 95.9 |  |
Operating Segments | TwinSpires |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Goodwill |  | 233.4 |  | $ 152.2
Additions |  | 81.2 |  |
Exacta Systems |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Total consideration | $ 248.2 |  |  |
Cash payment | 241.3 |  |  |
Deferred payments for acquisition of business included in other liabilities | $ 6.9 |  |  |
Payment term | 2 years |  |  |
Cash acquired in the acquisition | $ 1.8 |  |  |
Property and equipment | 9.0 |  |  |
Goodwill | $ 177.1 | $ 177.1 |  |

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