v3.19.3
Cover - shares
9 Months Ended
Sep. 30, 2019
Oct. 16, 2019
Cover page.    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2019  
Document Transition Report false  
Entity File Number 001-33998  
Entity Registrant Name Churchill Downs Inc  
Entity Incorporation, State or Country Code KY  
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  
Title of 12(b) Security Common Stock, No Par Value  
Trading Symbol CHDN  
Security Exchange Name NASDAQ  
Entity Current Reporting Status No  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   39,831,864
Amendment Flag false  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity Central Index Key 0000020212  
Current Fiscal Year End Date --12-31