| Cover | Feb. 01, 2021 | Jan. 29, 2021 |
| Cover [Abstract] | ||
| Document Type | 8-K | |
| Document Period End Date | Feb. 1, 2021 | |
| Entity Registrant Name | Churchill Downs Incorporated | |
| Entity Incorporation, State or Country Code | KY | |
| Entity File Number | 001-33998 | |
| Entity Tax Identification Number | 61-0156015 | |
| Entity Address, Address Line One | 600 North Hurstbourne Parkway, Suite 400 | |
| Entity Address, City or Town | Louisville, | |
| Entity Address, State or Province | KY | |
| Entity Address, Postal Zip Code | 40222 | |
| City Area Code | 502 | |
| Local Phone Number | 636-4400 | |
| Written Communications | false | |
| Soliciting Material | false | |
| Pre-commencement Tender Offer | false | |
| Pre-commencement Issuer Tender Offer | false | |
| Title of 12(b) Security | Common Stock, No Par Value | |
| Trading Symbol | CHDN | |
| Security Exchange Name | NASDAQ | |
| Entity Emerging Growth Company | false | |
| Amendment Flag | false | |
| Entity Central Index Key | 0000020212 |
