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Segment Information - Information About Reported Segments (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | $ 185,100,000 |  | $ 477,400,000 |  | $ 438,000,000.0 | $ 742,800,000
Intercompany net revenues | 0 |  | 0 |  | 0 | 0
Net (loss) income and comprehensive (loss) income attributable to CDI | (118,800,000) |  | 107,100,000 |  | (142,200,000) | 118,700,000
Net loss attributable to noncontrolling interest | 0 |  | 0 |  | (100,000) | 0
Net (loss) income | (118,800,000) | $ (23,500,000) | 107,100,000 | $ 11,600,000 | (142,300,000) | 118,700,000
Loss from discontinued operations, net of tax | (95,200,000) |  | (1,200,000) |  | (96,100,000) | (1,500,000)
(Loss) income from continuing operations, net of tax | (23,600,000) |  | 108,300,000 |  | (46,200,000) | 120,200,000
Depreciation and amortization | 22,100,000 |  | 21,500,000 |  | 44,100,000 | 42,300,000
Interest expense | 20,300,000 |  | 19,400,000 |  | 39,600,000 | 33,100,000
Income tax (benefit) provision | (7,900,000) |  | 38,600,000 |  | (19,500,000) | 45,100,000
EBITDA | 10,900,000 |  | 187,800,000 |  | 18,000,000.0 | 240,700,000
Stock-based compensation expense | 6,100,000 |  | 7,400,000 |  | 10,400,000 | 12,100,000
Other charges | (100,000) |  | 0 |  | (100,000) | 500,000
Pre-opening expense and other expense | 1,900,000 |  | 900,000 |  | 3,600,000 | 2,200,000
Impairment of intangible assets | 0 |  | 0 |  | 17,500,000 | 0
Transaction expense, net | 200,000 |  | 600,000 |  | 500,000 | 4,100,000
Interest, depreciation and amortization expense related to equity investments | 9,800,000 |  | 9,700,000 |  | 19,300,000 | 13,200,000
Fair Value of Interest Rate Swaps | 1,300,000 |  | 7,900,000 |  | 16,200,000 | 12,200,000
Midwest Gaming's recapitalization and transactions costs | 0 |  | 800,000 |  | 0 | 4,700,000
Other charges & recoveries, net | 0 |  | (100,000) |  | 0 | (100,000)
Total adjustments to EBITDA | 19,200,000 |  | 27,200,000 |  | 67,400,000 | 48,900,000
Adjusted EBITDA | 30,100,000 |  | 215,000,000.0 |  | 85,400,000 | 289,600,000
Churchill Downs |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 30,200,000 |  | 193,100,000 |  | 54,000,000.0 | 214,500,000
Adjusted Segment EBITDA | 4,500,000 |  | 121,900,000 |  | 6,400,000 | 123,300,000
Online Wagering |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 121,600,000 |  | 96,000,000.0 |  | 189,300,000 | 159,400,000
Impairment of intangible assets |  |  |  |  | 2,500,000 |
Adjusted Segment EBITDA | 38,800,000 |  | 22,200,000 |  | 53,800,000 | 39,100,000
Gaming |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 37,300,000 |  | 177,800,000 |  | 186,400,000 | 347,900,000
Adjusted Segment EBITDA | (2,000,000.0) |  | 76,100,000 |  | 47,000,000.0 | 140,900,000
Gaming | Presque Isle Downs & Casino |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Impairment of intangible assets |  |  |  |  | 12,500,000 |
Operating Segments |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 185,100,000 |  | 477,400,000 |  | 438,000,000.0 | 742,800,000
Adjusted Segment EBITDA | 41,300,000 |  | 220,200,000 |  | 107,200,000 | 303,300,000
Operating Segments | Churchill Downs |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 23,300,000 |  | 182,200,000 |  | 46,800,000 | 203,200,000
Intercompany net revenues | 6,900,000 |  | 10,900,000 |  | 7,200,000 | 11,300,000
Adjusted Segment EBITDA | 4,500,000 |  | 121,900,000 |  | 6,400,000 | 123,300,000
Operating Segments | Churchill Downs | Churchill Downs Racetrack |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 15,600,000 |  | 161,000,000.0 |  | 17,500,000 | 163,300,000
Operating Segments | Churchill Downs | Derby City Gaming |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 7,700,000 |  | 21,200,000 |  | 29,300,000 | 39,900,000
Operating Segments | Online Wagering |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 121,200,000 |  | 95,600,000 |  | 188,500,000 | 158,700,000
Intercompany net revenues | 400,000 |  | 400,000 |  | 800,000 | 700,000
Adjusted Segment EBITDA | 38,800,000 |  | 22,200,000 |  | 53,800,000 | 39,100,000
Operating Segments | Online Wagering | TwinSpires |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 119,900,000 |  | 95,600,000 |  | 186,500,000 | 158,600,000
Operating Segments | Online Wagering | Online Sports Betting and iGaming |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 1,300,000 |  | 0 |  | 2,000,000.0 | 100,000
Operating Segments | Gaming |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 37,300,000 |  | 177,600,000 |  | 184,900,000 | 346,400,000
Intercompany net revenues | 0 |  | 200,000 |  | 1,500,000 | 1,500,000
Adjusted Segment EBITDA | (2,000,000.0) |  | 76,100,000 |  | 47,000,000.0 | 140,900,000
Operating Segments | Gaming | Fair Grounds and VSI |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 11,100,000 |  | 30,900,000 |  | 42,700,000 | 68,400,000
Operating Segments | Gaming | Presque Isle Downs & Casino |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 2,000,000.0 |  | 37,100,000 |  | 29,600,000 | 66,800,000
Operating Segments | Gaming | Calder |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 5,700,000 |  | 25,600,000 |  | 27,500,000 | 51,000,000.0
Operating Segments | Gaming | Oxford |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 100,000 |  | 26,300,000 |  | 20,200,000 | 50,200,000
Operating Segments | Gaming | Ocean Downs |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 3,100,000 |  | 21,900,000 |  | 17,900,000 | 40,300,000
Operating Segments | Gaming | Riverwalk |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 7,400,000 |  | 14,200,000 |  | 20,100,000 | 30,500,000
Operating Segments | Gaming | Harlow’s |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 5,600,000 |  | 13,300,000 |  | 17,300,000 | 28,600,000
Operating Segments | Gaming | Lady Luck Nemacolin |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 2,300,000 |  | 8,300,000 |  | 9,600,000 | 10,600,000
Segment Reconciling Items | All Other |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net revenue | 3,300,000 |  | 22,000,000.0 |  | 17,800,000 | 34,500,000
Intercompany net revenues | 2,900,000 |  | 3,400,000 |  | 5,900,000 | 5,600,000
Adjusted Segment EBITDA | (11,200,000) |  | (5,200,000) |  | (21,800,000) | (13,700,000)
Eliminations |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Intercompany net revenues | $ (10,200,000) |  | $ (14,900,000) |  | $ (15,400,000) | $ (19,100,000)

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