Basis Of Presentation	9 Months Ended
Sep. 30, 2017
Basis of Presentation [Abstract]
Basis of Presentation and Significant Accounting Policies [Text Block]	Basis of Presentation The Churchill Downs Incorporated (the "Company", "we", "us", "our") financial statements are presented in conformity with the requirements of this Quarterly Report on Form 10-Q and consequently do not include all of the disclosures normally required by U.S. generally accepted accounting principles ("U.S. GAAP") or those normally made in our Annual Report on Form 10-K. The year-end Condensed Consolidated Balance Sheet data was derived from audited financial statements but does not include all disclosures required by U.S. GAAP. The following information is unaudited. All per share amounts assume dilution unless otherwise noted. This report should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2016. In the opinion of management, all adjustments necessary for a fair statement of this information have been made, and all such adjustments are of a normal, recurring nature. Our critical accounting policies are revenue recognition, goodwill and indefinite intangible assets, property and equipment, and income taxes. Our significant accounting policies are more fully described in Note 2 to the Consolidated Financial Statements included in Item 8. "Financial Statements and Supplementary Data" of our Annual Report on Form 10-K for the year ended December 31, 2016. Seasonality Racing Due to the seasonal nature of our live racing business, revenue and operating results for any interim quarter are generally not indicative of the revenues and operating results for the year and may not be comparable with results for the corresponding period of the previous year. Historically, we have had fewer live racing days during the first quarter of each year, and the majority of our live racing revenue occurs during the second quarter, with the running of the Kentucky Derby and the Kentucky Oaks. We conducted 57 live thoroughbred race days in the third quarter of 2017 and 60 live thoroughbred race days in the third quarter of 2016. For the nine months ended September 30, 2017, we conducted 176 live thoroughbred racing days, which compares to 175 live thoroughbred racing days during the nine months ended September 30, 2016. Casinos Revenue from our casino properties has a seasonal component and is typically higher during the first and second quarters. TwinSpires Due to the seasonal nature of the racing business, revenue and operating results for any interim quarter are generally not indicative of the revenues and operating results for the year and may not be comparable with results for the corresponding period of the previous year. Historically, our revenue is higher in the second quarter with the running of the Kentucky Derby and the Kentucky Oaks. Big Fish Games Revenue from our Big Fish Games, Inc. ("Big Fish Games") segment also has a seasonal component and is typically lower during the summer months.

Basis of Presentation

The Churchill Downs Incorporated (the "Company", "we", "us", "our") financial statements are presented in conformity with the requirements of this Quarterly Report on Form 10-Q and consequently do not include all of the disclosures normally required by U.S. generally accepted accounting principles ("U.S. GAAP") or those normally made in our Annual Report on Form 10-K. The year-end Condensed Consolidated Balance Sheet data was derived from audited financial statements but does not include all disclosures required by U.S. GAAP.

The following information is unaudited. All per share amounts assume dilution unless otherwise noted. This report should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2016.

In the opinion of management, all adjustments necessary for a fair statement of this information have been made, and all such adjustments are of a normal, recurring nature.

Our critical accounting policies are revenue recognition, goodwill and indefinite intangible assets, property and equipment, and income taxes. Our significant accounting policies are more fully described in Note 2 to the Consolidated Financial Statements included in Item 8. "Financial Statements and Supplementary Data" of our Annual Report on Form 10-K for the year ended December 31, 2016.

Seasonality

Racing

Due to the seasonal nature of our live racing business, revenue and operating results for any interim quarter are generally not indicative of the revenues and operating results for the year and may not be comparable with results for the corresponding period of the previous year. Historically, we have had fewer live racing days during the first quarter of each year, and the majority of our live racing revenue occurs during the second quarter, with the running of the Kentucky Derby and the Kentucky Oaks. We conducted 57 live thoroughbred race days in the third quarter of 2017 and 60 live thoroughbred race days in the third quarter of 2016. For the nine months ended September 30, 2017, we conducted 176 live thoroughbred racing days, which compares to 175 live thoroughbred racing days during the nine months ended September 30, 2016.

Casinos

Revenue from our casino properties has a seasonal component and is typically higher during the first and second quarters.

TwinSpires

Due to the seasonal nature of the racing business, revenue and operating results for any interim quarter are generally not indicative of the revenues and operating results for the year and may not be comparable with results for the corresponding period of the previous year. Historically, our revenue is higher in the second quarter with the running of the Kentucky Derby and the Kentucky Oaks.

Big Fish Games

Revenue from our Big Fish Games, Inc. ("Big Fish Games") segment also has a seasonal component and is typically lower during the summer months.