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- Definition

Disposal Group, Including Discontinued Operations, Transaction Expense

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- Definition

Employee Service Share-based Compensation, Nonvested Awards, Compensation Costs Previously Recognized

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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- Definition

Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Amount before tax of income (loss) from a discontinued operation. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal.

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- Definition

Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal.

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- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

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- Definition

Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

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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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No definition available.

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- Definition

Amount awarded to other party in judgment or settlement of litigation.

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Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

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- Definition

Amount of noncash income (expense), classified as other, from discontinued operations.

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- Definition

The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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Discontinued Operations - Additional Information (Details) - USD ($)			12 Months Ended
	May 22, 2020	Jan. 09, 2018	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Nov. 29, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of Big Fish Games			$ 0	$ 0	$ 970,700,000
Big Fish Games \| Cheryl Kater V Churchill Downs Incorporated \| Pending Litigation \| Churchill Downs Incorporated
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax settlement paid in cash	$ 124,000,000.0		124,000,000.0
Big Fish Games \| Cheryl Kater V Churchill Downs Incorporated \| Pending Litigation \| Aristocrat
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax settlement paid in cash	31,000,000.0
Big Fish Games \| Cheryl Kater V Churchill Downs Incorporated \| Pending Litigation \| Pro Forma
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amount to be paid into a settlement fund	$ 155,000,000.0
Big Fish Games \| Earnout Liability
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Liabilities measured at fair value on a recurring basis						$ 34,200,000
Big Fish Games \| Deferred Payments
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Liabilities measured at fair value on a recurring basis						$ 28,400,000
Big Fish Games \| Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Aggregate consideration		$ 990,000,000.0
Proceeds from sale of Big Fish Games		970,700,000
Working capital adjustments		5,200,000
Legal settlement		14,100,000	124,000,000.0	0	0
Gain on sale of Big Fish Games		219,500,000	$ 0	$ 0	219,500,000
Carrying value		751,200,000
Income tax provision on gain from sale of business		51,200,000
After tax gain		$ 168,300,000
Previously recognized compensation expense							$ 0
Stock-based compensation expense					$ 3,400,000