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- Definition

Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months through Year Five, Fees Not Yet Incurred or Paid

+ References

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

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Other Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	$ 369.8	$ 350.6	$ 369.8
Definite lived intangible assets	16.3	14.6	16.3
Amortization of definite-lived intangible assets		4.9	15.0	$ 6.0
Finite-lived intangible assets acquired		0.0	32.1	0.0
Additional payments not included in future estimated amortization expense		2.3
Other
Finite-Lived Intangible Assets [Line Items]
Definite lived intangible assets	7.2	6.9	7.2
Total Churchill Downs
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired		2.3	2.3
Gaming rights
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	303.2	288.2	303.2
Gaming rights \| Online Wagering
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	8.0		8.0
Gaming rights \| Gaming
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	3.0		3.0
Trademarks
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	50.2	$ 47.7	50.2
Presque Isle \| Gaming rights
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	56.0		56.0
Presque Isle \| Gaming rights \| Online Wagering
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	10.0		10.0
Presque Isle \| Trademarks
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	15.2		15.2
Turfway Park
Finite-Lived Intangible Assets [Line Items]
Amortization of definite-lived intangible assets	10.0
Turfway Park \| Gaming rights
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	9.8		9.8
Turfway Park \| Trademarks
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)	$ 5.5		$ 5.5
Ocean Downs \| Other
Finite-Lived Intangible Assets [Line Items]
Definite lived intangible assets				2.3
Ocean Downs \| Gaming rights
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)				87.0
Ocean Downs \| Trademarks
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets (excluding goodwill)				8.3
Derby City Gaming \| Other
Finite-Lived Intangible Assets [Line Items]
Definite lived intangible assets				$ 0.1