| In millions, except per share items | Dec-31-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 | Dec-31-20 |
| | 8-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q | 10-K |
| Net revenue: | | | | | | | | |
| Total net revenue | 480.1 | 582.5 | 364.1 | 364.8 | 393.0 | 515.1 | 324.3 | 278.2 |
| Total net revenue growth | 31.6% | 13.1% | 12.3% | 31.1% | 16.3% | 178.3% | 28.2% | -0.9% |
| Operating expense: | | | | | | | | |
| Operating expense | | | | | | | | |
| Selling, general and administrative expense | 51.5 | 38.4 | 35.9 | 38.8 | 36.1 | 33.4 | 30.2 | 29.5 |
| Asset impairments | 33.4 | | 4.9 | 4.1 | | 11.2 | | |
| Total operating expense | 84.9 | 382.8 | 316.7 | 330.1 | 325.4 | 379.7 | 277.6 | 255.5 |
| Operating income | 11.7 | 199.7 | 47.4 | 34.7 | 67.6 | 135.4 | 46.7 | 22.7 |
| Operating margin | 2.4% | 34.3% | 13.0% | 9.5% | 17.2% | 26.3% | 14.4% | 8.2% |
| |
| Other income (expense): | | | | | | | | |
| Interest expense, net | -54.7 | -35.1 | -21.3 | -21.6 | -21.7 | -22.0 | -19.4 | -20.7 |
| Equity in income of unconsolidated affiliates | 37.3 | 40.5 | 32.5 | 40.2 | 41.7 | 36.4 | 24.9 | 14.5 |
| Gain on Calder land sale | | | | | | | | |
| Miscellaneous, net | | | | | | | | |
| Total other income (expense) | -14.8 | 280.2 | 11.2 | 19.0 | 20.1 | 14.5 | 5.6 | -6.0 |
| Income from continuing operations before provision for income taxes | | 479.9 | 58.6 | 53.7 | 87.7 | 149.9 | 52.3 | 16.7 |
| Income tax (provision) benefit | 4.1 | -140.6 | -16.5 | -10.4 | -26.3 | -41.6 | -16.2 | -10.9 |
| Income from continued operations, net of tax | 1.0 | 339.3 | 42.1 | 43.3 | 61.4 | 108.3 | 36.1 | 16.2 |
| Net income (loss) | | | | 43.3 | 61.4 | | | 17.1 |
| Net loss attributable to noncontrolling interest | | | | | | | | |
| Net income (loss) and comprehensive income (loss) attributable to Churchill Downs Incorporated | 1.0 | 339.3 | 42.1 | 43.3 | 61.4 | 108.3 | 36.1 | 17.1 |
| |
| Net income (loss) per common share data - basic: | | | | | | | | |
| Continuing operations (in dollars per share) | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 |
| Discontinued operations (in dollars per share) | | 38.1 | 38.3 | | | 38.7 | 39.0 | 0.0 |
| |
| Net income (loss) per common share - basic (in dollars per share) | $0.03 | $8.91 | $1.10 | $1.14 | $1.59 | $2.80 | $0.93 | $0.43 |
| |
| Net income (loss) per common share data - diluted: | | | | | | | | |
| Continuing operations (in dollars per share) | | 38.6 | 38.8 | 0.0 | 0.0 | 39.3 | 39.6 | 0.0 |
| Discontinued operations (in dollars per share) | | | | | | | | 0.0 |
| Net income (loss) per common share - diluted (in dollars per share) | $0.03 | $8.79 | $1.08 | $1.12 | $1.57 | $2.76 | $0.91 | $0.42 |
| |
| Weighted average shares outstanding: | | | | | | | | |
| Basic (in shares) | 37.6 | 38.1 | 38.3 | 38.6 | 38.6 | 38.7 | 39.0 | 39.6 |
| Diluted (in shares) | 38.1 | 38.6 | 38.8 | 39.2 | 39.2 | 39.3 | 39.6 | 40.1 |
| Gain on Calder land sale | | | | | | | | |