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Stock-Based Compensation Plans - Additional Information (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Feb. 24, 2016 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  | $ 36.1 | $ 32.9 | $ 31.8
Income tax benefit related to stock-based employee compensation |  | 2.8 | 2.3 | 1.6
Stock-based compensation expense |  | 36.1 | 32.9 | 31.8
Fair value of shares and units vested |  | $ 69.7 | 55.0 | 56.9
Award period |  | 1 year |  |
Performance Share Units (PSU) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  | $ 4.1 |  |
Liability classified awards |  | $ 25.0 |  |
Performance Share Units (PSU) | Minimum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting period (in years) |  | 2 years |  |
Performance Share Units (PSU) | Maximum |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting period (in years) |  | 3 years |  |
Churchill Downs Incorporated 2016 Omnibus Stock Incentive Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting period (in years) | 1 year |  |  |
Churchill Downs Incorporated 2007 Omnibus Stock Incentive Plan | Restricted Stock Units (RSU) |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting period (in years) |  | 3 years |  |
Churchill Downs Incorporated 2007 Omnibus Stock Incentive Plan | Restricted Stock Units (RSU) | Director |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting period (in years) |  | 1 year |  |
Continuing Operations |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  | $ 36.1 | $ 32.9 | $ 31.8

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479830/718-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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