| Cover | Apr. 26, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Apr. 26, 2022 |
| Entity Registrant Name | Churchill Downs Incorporated |
| Entity Incorporation, State or Country Code | KY |
| Entity File Number | 001-33998 |
| Entity Tax Identification Number | 61-0156015 |
| Entity Address, Address Line One | 600 North Hurstbourne Parkway, Suite 400 |
| Entity Address, City or Town | Louisville |
| Entity Address, State or Province | KY |
| Entity Address, Postal Zip Code | 40222 |
| City Area Code | 502 |
| Local Phone Number | 636-4400 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, No Par Value |
| Trading Symbol | CHDN |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0000020212 |
| Recast Segment Information | Apr. 26, 2022 |
| Accounting Changes and Error Corrections [Abstract] | |
| Segment Reporting Disclosure | CHURCHILL DOWNS INCORPORATED Recast Segment Operating Results (unaudited) Three Months Ended Year Ended December 31, (in millions) March 31, 2021 June 30, 2021 September 30, 2021 December 31, 2021 2021 2020 Net revenue: Live and Historical Racing $ 63.2 $ 175.9 $ 79.7 $ 90.3 $ 409.1 $ 169.6 TwinSpires 103.5 140.8 107.5 99.6 451.4 430.1 Gaming 152.0 186.0 185.3 172.1 695.4 435.3 All Other 5.6 12.4 20.5 2.8 41.3 19.0 Total net revenue 324.3 515.1 393.0 364.8 1,597.2 1,054.0 Operating expense: Live and Historical Racing 54.7 100.3 62.3 71.6 288.9 179.0 TwinSpires 77.5 102.1 83.0 83.2 345.8 293.1 Gaming 106.3 121.0 127.7 121.3 476.3 357.9 All Other 8.8 11.7 14.3 5.3 40.1 30.5 Selling, general and administrative expense 30.2 33.4 36.1 38.8 138.5 114.8 Asset impairments — 11.2 — 4.1 15.3 17.5 Transaction expense, net 0.1 — 2.0 5.8 7.9 1.0 Total operating expense 277.6 379.7 325.4 330.1 1,312.8 993.8 Operating income $ 46.7 $ 135.4 $ 67.6 $ 34.7 $ 284.4 $ 60.2 |
| Recast Segment Information - Recast Segment Operating Results (Tables) | Apr. 20, 2021 |
| Accounting Changes and Error Corrections [Abstract] | |
| Net Revenue From External Customers and Intercompany Revenue From Each Operating Segment | Three Months Ended Year Ended December 31, (in millions) March 31, 2021 June 30, 2021 September 30, 2021 December 31, 2021 2021 2020 Net revenue: Live and Historical Racing $ 63.2 $ 175.9 $ 79.7 $ 90.3 $ 409.1 $ 169.6 TwinSpires 103.5 140.8 107.5 99.6 451.4 430.1 Gaming 152.0 186.0 185.3 172.1 695.4 435.3 All Other 5.6 12.4 20.5 2.8 41.3 19.0 Total net revenue 324.3 515.1 393.0 364.8 1,597.2 1,054.0 Operating expense: Live and Historical Racing 54.7 100.3 62.3 71.6 288.9 179.0 TwinSpires 77.5 102.1 83.0 83.2 345.8 293.1 Gaming 106.3 121.0 127.7 121.3 476.3 357.9 All Other 8.8 11.7 14.3 5.3 40.1 30.5 Selling, general and administrative expense 30.2 33.4 36.1 38.8 138.5 114.8 Asset impairments — 11.2 — 4.1 15.3 17.5 Transaction expense, net 0.1 — 2.0 5.8 7.9 1.0 Total operating expense 277.6 379.7 325.4 330.1 1,312.8 993.8 Operating income $ 46.7 $ 135.4 $ 67.6 $ 34.7 $ 284.4 $ 60.2 Three Months Ended Year Ended December 31, (in millions) March 31, 2021 June 30, 2021 September 30, 2021 December 31, 2021 2021 2020 Net revenue from external customers: Live and Historical Racing: Churchill Downs Racetrack $ 2.0 $ 105.2 $ 7.4 $ 13.5 $ 128.1 $ 63.3 Derby City Gaming 32.9 39.9 40.2 41.3 154.3 79.5 Oak Grove 19.4 25.6 27.1 28.6 100.7 16.6 Turfway Park 4.5 0.7 0.7 2.3 8.1 7.1 Newport 4.4 4.5 4.3 4.6 17.9 3.1 Total Live and Historical Racing 63.2 175.9 79.7 90.3 409.1 169.6 TwinSpires: Horse Racing 96.5 132.4 98.8 88.9 416.6 418.8 Sports and Casino 7.0 8.4 8.7 10.7 34.8 11.3 Total TwinSpires 103.5 140.8 107.5 99.6 451.4 430.1 Gaming: Fair Grounds and VSI 38.3 35.1 24.8 35.4 133.6 97.6 Presque Isle 23.8 30.5 35.9 29.4 119.6 73.1 Calder 20.9 27.4 25.9 25.8 100.0 51.8 Oxford 15.7 24.6 31.8 27.7 99.8 44.9 Ocean Downs 20.0 27.0 31.7 21.9 100.6 60.2 Riverwalk 14.4 18.4 14.5 13.9 61.2 46.3 Harlow’s 14.0 16.6 13.3 12.2 56.1 40.7 Lady Luck Nemacolin 4.9 6.4 7.4 5.8 24.5 20.7 Total Gaming 152.0 186.0 185.3 172.1 695.4 435.3 All Other 5.6 12.4 20.5 2.8 41.3 19.0 Net revenue from external customers $ 324.3 $ 515.1 $ 393.0 $ 364.8 $ 1,597.2 $ 1,054.0 (in millions) Three Months Ended Year Ended December 31, Intercompany net revenue: March 31, 2021 June 30, 2021 September 30, 2021 December 31, 2021 2021 2020 Live and Historical Racing $ 1.5 $ 14.6 $ 1.8 $ 3.6 $ 21.5 $ 19.2 TwinSpires 1.5 1.8 1.5 1.6 6.4 5.5 Gaming 2.0 — 0.3 0.7 3.0 2.5 All Other 1.6 2.4 2.5 1.4 7.9 7.8 Eliminations (6.6) (18.8) (6.1) (7.3) (38.8) (35.0) Intercompany net revenue $ — $ — $ — $ — $ — $ — Year Ended December 31, 2021 (in millions) Live and Historical Racing TwinSpires Gaming All Other Eliminations Total Net revenue $ 430.6 $ 457.8 $ 698.4 $ 49.2 $ (38.8) $ 1,597.2 Taxes and purses (126.3) (30.7) (264.4) (13.1) — (434.5) Marketing and advertising (12.9) (49.4) (11.8) (0.5) 0.1 (74.5) Salaries and benefits (48.4) (27.0) (87.1) (7.8) — (170.3) Content expense (2.5) (206.6) (4.7) (5.7) 36.9 (182.6) Selling, general and administrative expense (12.8) (11.0) (27.9) (55.2) 1.5 (105.4) Other operating expense (53.0) (50.4) (72.3) (10.0) 0.4 (185.3) Other income 0.3 — 181.7 0.5 (0.1) 182.4 Adjusted EBITDA $ 175.0 $ 82.7 $ 411.9 $ (42.6) $ — $ 627.0 Year Ended December 31, 2020 (in millions) Live and Historical Racing TwinSpires Gaming All Other Eliminations Total Net revenue $ 188.8 $ 435.6 $ 437.8 $ 26.8 $ (35.0) $ 1,054.0 Taxes and purses (64.1) (25.1) (171.6) (7.5) — (268.3) Marketing and advertising (6.2) (16.5) (7.5) (0.2) 0.2 (30.2) Salaries and benefits (32.5) (24.6) (75.9) (5.8) — (138.8) Content expense (1.5) (202.7) (3.5) (3.7) 33.0 (178.4) Selling, general and administrative expense (8.7) (10.4) (25.4) (42.3) 1.5 (85.3) Other operating expense (36.8) (40.5) (59.7) (8.9) 0.3 (145.6) Other income 0.1 0.1 78.9 — — 79.1 Adjusted EBITDA $ 39.1 $ 115.9 $ 173.1 $ (41.6) $ — $ 286.5 Three Months Ended March 31, 2021 (in millions) Live and Historical Racing TwinSpires Gaming All Other Eliminations Total Net revenue $ 64.7 $ 105.0 $ 154.0 $ 7.2 $ (6.6) $ 324.3 Taxes and purses (20.0) (6.4) (59.3) (3.1) — (88.8) Marketing and advertising (2.1) (8.5) (1.4) (0.1) — (12.1) Salaries and benefits (10.0) (6.2) (19.9) (1.2) — (37.3) Content expense (0.6) (46.5) (1.0) (1.3) 6.2 (43.2) Selling, general and administrative expense (3.0) (2.6) (6.0) (12.6) 0.3 (23.9) Other operating expense (10.7) (11.7) (15.5) (2.2) 0.1 (40.0) Other income — — 31.5 0.1 — 31.6 Adjusted EBITDA $ 18.3 $ 23.1 $ 82.4 $ (13.2) $ — $ 110.6 Three Months Ended June 30, 2021 (in millions) Live and Historical Racing TwinSpires Gaming All Other Eliminations Total Net revenue $ 190.5 $ 142.6 $ 186.0 $ 14.8 $ (18.8) $ 515.1 Taxes and purses (50.8) (8.3) (70.0) (3.9) — (133.0) Marketing and advertising (4.9) (16.7) (2.5) — — (24.1) Salaries and benefits (15.3) (6.8) (20.6) (2.3) — (45.0) Content expense (0.8) (68.5) (1.3) (1.8) 18.4 (54.0) Selling, general and administrative expense (3.1) (2.9) (5.9) (13.4) 0.4 (24.9) Other operating expense (17.3) (14.8) (17.7) (2.9) — (52.7) Other income 0.1 — 51.8 — — 51.9 Adjusted EBITDA $ 98.4 $ 24.6 $ 119.8 $ (9.5) $ — $ 233.3 |
| Schedule of Segment Reporting Information | Three Months Ended September 30, 2021 (in millions) Live and Historical Racing TwinSpires Gaming All Other Eliminations Total Net revenue $ 81.5 $ 109.0 $ 185.6 $ 23.0 $ (6.1) $ 393.0 Taxes and purses (24.6) (8.0) (71.8) (4.9) — (109.3) Marketing and advertising (2.9) (10.6) (3.6) (0.3) — (17.4) Salaries and benefits (10.9) (7.0) (22.5) (3.1) — (43.5) Content expense (0.5) (47.1) (1.2) (1.4) 5.6 (44.6) Selling, general and administrative expense (3.1) (2.6) (7.1) (14.3) 0.4 (26.7) Other operating expense (11.8) (11.6) (19.7) (3.5) 0.1 (46.5) Other income — — 51.0 0.1 — 51.1 Adjusted EBITDA $ 27.7 $ 22.1 $ 110.7 $ (4.4) $ — $ 156.1 Three Months Ended December 31, 2021 (in millions) Live and Historical Racing TwinSpires Gaming All Other Eliminations Total Net revenue $ 93.9 $ 101.2 $ 172.8 $ 4.2 $ (7.3) $ 364.8 Taxes and purses (30.9) (8.0) (63.3) (1.2) — (103.4) Marketing and advertising (3.0) (13.6) (4.3) (0.1) 0.1 (20.9) Salaries and benefits (12.2) (7.0) (24.1) (1.2) — (44.5) Content expense (0.6) (44.5) (1.2) (1.2) 6.7 (40.8) Selling, general and administrative expense (3.6) (2.9) (8.9) (14.9) 0.4 (29.9) Other operating expense (13.2) (12.3) (19.4) (1.4) 0.2 (46.1) Other income 0.2 — 47.4 0.3 (0.1) 47.8 Adjusted EBITDA $ 30.6 $ 12.9 $ 99.0 $ (15.5) $ — $ 127.0 Three Months Ended Year Ended December 31, March 31, 2021 June 30, 2021 September 30, 2021 December 31, 2021 2021 2020 (in millions) Comprehensive income (loss) $ 36.1 $ 108.3 $ 61.4 $ 43.3 $ 249.1 $ (81.9) Net income (loss) and comprehensive income (loss) attributable to CDI Net loss attributable to noncontrolling interest — — — — — 0.2 Net income (loss) before noncontrolling interest 36.1 108.3 61.4 43.3 249.1 (82.1) Income (loss) from discontinued operations, net of tax — — — — — 95.4 Income (loss) from continuing operations, net of tax 36.1 108.3 61.4 43.3 249.1 13.3 Additions: Depreciation and amortization 26.0 26.0 25.9 25.3 103.2 92.9 Interest expense 19.4 22.0 21.7 21.6 84.7 80.0 Income tax provision (benefit) 16.2 41.6 26.3 10.4 94.5 (5.3) EBITDA $ 97.7 $ 197.9 $ 135.3 $ 100.6 $ 531.5 $ 180.9 Adjustments to EBITDA: Selling, general and administrative: Stock-based compensation expense $ 5.5 $ 7.1 $ 7.8 $ 7.4 $ 27.8 23.7 Other charges — 0.2 — — 0.2 0.8 Pre-opening expense and other expense 0.6 1.5 1.7 2.0 5.8 11.2 Other income, expense: Interest, depreciation and amortization expense related to equity investments 9.6 10.5 10.7 10.7 41.5 38.5 Changes in fair value of Rivers Des Plaines' interest rate swaps (4.2) (1.8) (2.0) (4.9) (12.9) 12.9 Rivers Des Plaines' legal reserves and transaction costs 1.3 6.7 0.6 1.3 9.9 — Transaction expense, net 0.1 — 2.0 5.8 7.9 1.0 Impairment of tangible and other intangible assets — 11.2 — 4.1 15.3 17.5 Total adjustments to EBITDA 12.9 35.4 20.8 26.4 95.5 105.6 Adjusted EBITDA $ 110.6 $ 233.3 $ 156.1 $ 127.0 $ 627.0 $ 286.5 Adjusted EBITDA by segment: Live and Historical Racing $ 18.3 $ 98.4 $ 27.7 $ 30.6 $ 175.0 $ 39.1 TwinSpires 23.1 24.6 22.1 12.9 82.7 115.9 Gaming 82.4 119.8 110.7 99.0 411.9 173.1 Total segment Adjusted EBITDA 123.8 242.8 160.5 142.5 669.6 328.1 All Other (13.2) (9.5) (4.4) (15.5) (42.6) (41.6) Total Adjusted EBITDA $ 110.6 $ 233.3 $ 156.1 $ 127.0 $ 627.0 $ 286.5 |
| Recast Segment Information - Recast Segment Operating Results (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended | ||||
| Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | |
| Segment Reporting Information [Line Items] | ||||||
| Net revenue | $ 364.8 | $ 393 | $ 515.1 | $ 324.3 | $ 1,597.2 | $ 1,054 |
| Selling, general and administrative expense | 38.8 | 36.1 | 33.4 | 30.2 | 138.5 | 114.8 |
| Asset impairments | 4.1 | 0 | 11.2 | 0 | 15.3 | 17.5 |
| Transaction expense, net | 5.8 | 2 | 0 | 0.1 | 7.9 | 1 |
| Total operating expense | 330.1 | 325.4 | 379.7 | 277.6 | 1,312.8 | 993.8 |
| Operating income | 34.7 | 67.6 | 135.4 | 46.7 | 284.4 | 60.2 |
| Live and Historical Racing | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue | 90.3 | 79.7 | 175.9 | 63.2 | 409.1 | 169.6 |
| Operating expenses | 71.6 | 62.3 | 100.3 | 54.7 | 288.9 | 179 |
| TwinSpires | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue | 99.6 | 107.5 | 140.8 | 103.5 | 451.4 | 430.1 |
| Operating expenses | 83.2 | 83 | 102.1 | 77.5 | 345.8 | 293.1 |
| Gaming | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue | 172.1 | 185.3 | 186 | 152 | 695.4 | 435.3 |
| Operating expenses | 121.3 | 127.7 | 121 | 106.3 | 476.3 | 357.9 |
| All Other | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue | 2.8 | 20.5 | 12.4 | 5.6 | 41.3 | 19 |
| Operating expenses | $ 5.3 | $ 14.3 | $ 11.7 | $ 8.8 | $ 40.1 | $ 30.5 |
| Recast Segment Information - Recast Segment Revenue (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended | ||||
| Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | |
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | $ 364.8 | $ 393 | $ 515.1 | $ 324.3 | $ 1,597.2 | $ 1,054 |
| Intercompany net revenue | 0 | 0 | 0 | 0 | 0 | 0 |
| Operating Segments | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 364.8 | 393 | 515.1 | 324.3 | 1,597.2 | 1,054 |
| Operating Segments | Live and Historical Racing | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 93.9 | 81.5 | 190.5 | 64.7 | 430.6 | 188.8 |
| Intercompany net revenue | 3.6 | 1.8 | 14.6 | 1.5 | 21.5 | 19.2 |
| Operating Segments | Live and Historical Racing | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 90.3 | 79.7 | 175.9 | 63.2 | 409.1 | 169.6 |
| Operating Segments | TwinSpires | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 101.2 | 109 | 142.6 | 105 | 457.8 | 435.6 |
| Intercompany net revenue | 1.6 | 1.5 | 1.8 | 1.5 | 6.4 | 5.5 |
| Operating Segments | TwinSpires | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 99.6 | 107.5 | 140.8 | 103.5 | 451.4 | 430.1 |
| Operating Segments | Gaming | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 172.8 | 185.6 | 186 | 154 | 698.4 | 437.8 |
| Intercompany net revenue | 0.7 | 0.3 | 0 | 2 | 3 | 2.5 |
| Operating Segments | Gaming | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 172.1 | 185.3 | 186 | 152 | 695.4 | 435.3 |
| All Other | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 4.2 | 23 | 14.8 | 7.2 | 49.2 | 26.8 |
| Intercompany net revenue | 1.4 | 2.5 | 2.4 | 1.6 | 7.9 | 7.8 |
| All Other | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 2.8 | 20.5 | 12.4 | 5.6 | 41.3 | 19 |
| Eliminations | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | (7.3) | (6.1) | (18.8) | (6.6) | (38.8) | (35) |
| Intercompany net revenue | (7.3) | (6.1) | (18.8) | (6.6) | (38.8) | (35) |
| Churchill Downs Racetrack | Operating Segments | Live and Historical Racing | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 13.5 | 7.4 | 105.2 | 2 | 128.1 | 63.3 |
| Derby City Gaming | Operating Segments | Live and Historical Racing | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 41.3 | 40.2 | 39.9 | 32.9 | 154.3 | 79.5 |
| Oak Grove | Operating Segments | Live and Historical Racing | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 28.6 | 27.1 | 25.6 | 19.4 | 100.7 | 16.6 |
| Turfway Park | Operating Segments | Live and Historical Racing | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 4.6 | 4.3 | 4.5 | 4.5 | 17.9 | 3.1 |
| Newport | Operating Segments | Live and Historical Racing | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 2.3 | 0.7 | 0.7 | 4.4 | 8.1 | 7.1 |
| Horse Racing | Operating Segments | TwinSpires | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 88.9 | 98.8 | 132.4 | 96.5 | 416.6 | 418.8 |
| Sports and Casino | Operating Segments | TwinSpires | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 10.7 | 8.7 | 8.4 | 7 | 34.8 | 11.3 |
| Fair Grounds and VSI | Operating Segments | Gaming | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 35.4 | 24.8 | 35.1 | 38.3 | 133.6 | 97.6 |
| Presque Isle | Operating Segments | Gaming | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 29.4 | 35.9 | 30.5 | 23.8 | 119.6 | 73.1 |
| Calder | Operating Segments | Gaming | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 25.8 | 25.9 | 27.4 | 20.9 | 100 | 51.8 |
| Oxford | Operating Segments | Gaming | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 27.7 | 31.8 | 24.6 | 15.7 | 99.8 | 44.9 |
| Ocean Downs | Operating Segments | Gaming | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 21.9 | 31.7 | 27 | 20 | 100.6 | 60.2 |
| Riverwalk | Operating Segments | Gaming | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 13.9 | 14.5 | 18.4 | 14.4 | 61.2 | 46.3 |
| Harlow’s | Operating Segments | Gaming | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | 12.2 | 13.3 | 16.6 | 14 | 56.1 | 40.7 |
| Lady Luck Nemacolin | Operating Segments | Gaming | External Customer | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue from external customers | $ 5.8 | $ 7.4 | $ 6.4 | $ 4.9 | $ 24.5 | $ 20.7 |
| Recast Segment Information - Schedule of Recast Adjusted EBITDA by Segment (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended | ||||
| Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | |
| Segment Reporting Information [Line Items] | ||||||
| Net revenue | $ 364.8 | $ 393 | $ 515.1 | $ 324.3 | $ 1,597.2 | $ 1,054 |
| Taxes and purses | (103.4) | (109.3) | (133) | (88.8) | (434.5) | (268.3) |
| Marketing and advertising | (20.9) | (17.4) | (24.1) | (12.1) | (74.5) | (30.2) |
| Salaries and benefits | (44.5) | (43.5) | (45) | (37.3) | (170.3) | (138.8) |
| Content expense | (40.8) | (44.6) | (54) | (43.2) | (182.6) | (178.4) |
| Selling, general and administrative expense | (29.9) | (26.7) | (24.9) | (23.9) | (105.4) | (85.3) |
| Other operating expense | (46.1) | (46.5) | (52.7) | (40) | (185.3) | (145.6) |
| Other income | 47.8 | 51.1 | 51.9 | 31.6 | 182.4 | 79.1 |
| Adjusted EBITDA | 127 | 156.1 | 233.3 | 110.6 | 627 | 286.5 |
| Operating Segments | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Adjusted EBITDA | 142.5 | 160.5 | 242.8 | 123.8 | 669.6 | 328.1 |
| All Other | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue | 4.2 | 23 | 14.8 | 7.2 | 49.2 | 26.8 |
| Taxes and purses | (1.2) | (4.9) | (3.9) | (3.1) | (13.1) | (7.5) |
| Marketing and advertising | (0.1) | (0.3) | 0 | (0.1) | (0.5) | (0.2) |
| Salaries and benefits | (1.2) | (3.1) | (2.3) | (1.2) | (7.8) | (5.8) |
| Content expense | (1.2) | (1.4) | (1.8) | (1.3) | (5.7) | (3.7) |
| Selling, general and administrative expense | (14.9) | (14.3) | (13.4) | (12.6) | (55.2) | (42.3) |
| Other operating expense | (1.4) | (3.5) | (2.9) | (2.2) | (10) | (8.9) |
| Other income | 0.3 | 0.1 | 0 | 0.1 | 0.5 | 0 |
| Adjusted EBITDA | (15.5) | (4.4) | (9.5) | (13.2) | (42.6) | (41.6) |
| Eliminations | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue | (7.3) | (6.1) | (18.8) | (6.6) | (38.8) | (35) |
| Taxes and purses | 0 | 0 | 0 | 0 | 0 | 0 |
| Marketing and advertising | 0.1 | 0 | 0 | 0 | 0.1 | 0.2 |
| Salaries and benefits | 0 | 0 | 0 | 0 | 0 | 0 |
| Content expense | 6.7 | 5.6 | 18.4 | 6.2 | 36.9 | 33 |
| Selling, general and administrative expense | 0.4 | 0.4 | 0.4 | 0.3 | 1.5 | 1.5 |
| Other operating expense | 0.2 | 0.1 | 0 | 0.1 | 0.4 | 0.3 |
| Other income | (0.1) | 0 | 0 | 0 | (0.1) | 0 |
| Adjusted EBITDA | 0 | 0 | 0 | 0 | 0 | 0 |
| Live and Historical Racing | Operating Segments | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue | 93.9 | 81.5 | 190.5 | 64.7 | 430.6 | 188.8 |
| Taxes and purses | (30.9) | (24.6) | (50.8) | (20) | (126.3) | (64.1) |
| Marketing and advertising | (3) | (2.9) | (4.9) | (2.1) | (12.9) | (6.2) |
| Salaries and benefits | (12.2) | (10.9) | (15.3) | (10) | (48.4) | (32.5) |
| Content expense | (0.6) | (0.5) | (0.8) | (0.6) | (2.5) | (1.5) |
| Selling, general and administrative expense | (3.6) | (3.1) | (3.1) | (3) | (12.8) | (8.7) |
| Other operating expense | (13.2) | (11.8) | (17.3) | (10.7) | (53) | (36.8) |
| Other income | 0.2 | 0 | 0.1 | 0 | 0.3 | 0.1 |
| Adjusted EBITDA | 30.6 | 27.7 | 98.4 | 18.3 | 175 | 39.1 |
| TwinSpires | Operating Segments | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue | 101.2 | 109 | 142.6 | 105 | 457.8 | 435.6 |
| Taxes and purses | (8) | (8) | (8.3) | (6.4) | (30.7) | (25.1) |
| Marketing and advertising | (13.6) | (10.6) | (16.7) | (8.5) | (49.4) | (16.5) |
| Salaries and benefits | (7) | (7) | (6.8) | (6.2) | (27) | (24.6) |
| Content expense | (44.5) | (47.1) | (68.5) | (46.5) | (206.6) | (202.7) |
| Selling, general and administrative expense | (2.9) | (2.6) | (2.9) | (2.6) | (11) | (10.4) |
| Other operating expense | (12.3) | (11.6) | (14.8) | (11.7) | (50.4) | (40.5) |
| Other income | 0 | 0 | 0 | 0 | 0 | 0.1 |
| Adjusted EBITDA | 12.9 | 22.1 | 24.6 | 23.1 | 82.7 | 115.9 |
| Gaming | Operating Segments | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Net revenue | 172.8 | 185.6 | 186 | 154 | 698.4 | 437.8 |
| Taxes and purses | (63.3) | (71.8) | (70) | (59.3) | (264.4) | (171.6) |
| Marketing and advertising | (4.3) | (3.6) | (2.5) | (1.4) | (11.8) | (7.5) |
| Salaries and benefits | (24.1) | (22.5) | (20.6) | (19.9) | (87.1) | (75.9) |
| Content expense | (1.2) | (1.2) | (1.3) | (1) | (4.7) | (3.5) |
| Selling, general and administrative expense | (8.9) | (7.1) | (5.9) | (6) | (27.9) | (25.4) |
| Other operating expense | (19.4) | (19.7) | (17.7) | (15.5) | (72.3) | (59.7) |
| Other income | 47.4 | 51 | 51.8 | 31.5 | 181.7 | 78.9 |
| Adjusted EBITDA | $ 99 | $ 110.7 | $ 119.8 | $ 82.4 | $ 411.9 | $ 173.1 |
| Recast Segment Information - Reconciliation of Comprehensive Income to Adjusted EBITDA (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended | ||||
| Dec. 31, 2021 | Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2021 | Dec. 31, 2020 | |
| Segment Reporting Information [Line Items] | ||||||
| Comprehensive income (loss) | $ 43.3 | $ 61.4 | $ 108.3 | $ 36.1 | $ 249.1 | $ (81.9) |
| Net loss attributable to noncontrolling interest | 0 | 0 | 0 | 0 | 0 | 0.2 |
| Net income (loss) before noncontrolling interest | 43.3 | 61.4 | 108.3 | 36.1 | 249.1 | (82.1) |
| Income (loss) from discontinued operations, net of tax | 0 | 0 | 0 | 0 | 0 | 95.4 |
| Income (loss) from continuing operations, net of tax | 43.3 | 61.4 | 108.3 | 36.1 | 249.1 | 13.3 |
| Depreciation and amortization | 25.3 | 25.9 | 26 | 26 | 103.2 | 92.9 |
| Interest expense | 21.6 | 21.7 | 22 | 19.4 | 84.7 | 80 |
| Income tax provision (benefit) | 10.4 | 26.3 | 41.6 | 16.2 | 94.5 | (5.3) |
| EBITDA | 100.6 | 135.3 | 197.9 | 97.7 | 531.5 | 180.9 |
| Stock-based compensation expense | 7.4 | 7.8 | 7.1 | 5.5 | 27.8 | 23.7 |
| Other charges | 0 | 0 | 0.2 | 0 | 0.2 | 0.8 |
| Pre-opening expense and other expense | 2 | 1.7 | 1.5 | 0.6 | 5.8 | 11.2 |
| Interest, depreciation and amortization expense related to equity investments | 10.7 | 10.7 | 10.5 | 9.6 | 41.5 | 38.5 |
| Changes in fair value of Rivers Des Plaines' interest rate swaps | (4.9) | (2) | (1.8) | (4.2) | (12.9) | 12.9 |
| Rivers Des Plaines' legal reserves and transaction costs | 1.3 | 0.6 | 6.7 | 1.3 | 9.9 | 0 |
| Transaction expense, net | 5.8 | 2 | 0 | 0.1 | 7.9 | 1 |
| Impairment of tangible and other intangible assets | 4.1 | 0 | 11.2 | 0 | 15.3 | 17.5 |
| Total adjustments to EBITDA | 26.4 | 20.8 | 35.4 | 12.9 | 95.5 | 105.6 |
| Adjusted EBITDA | 127 | 156.1 | 233.3 | 110.6 | 627 | 286.5 |
| Operating Segments | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Adjusted EBITDA | 142.5 | 160.5 | 242.8 | 123.8 | 669.6 | 328.1 |
| Operating Segments | Live and Historical Racing | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Adjusted EBITDA | 30.6 | 27.7 | 98.4 | 18.3 | 175 | 39.1 |
| Operating Segments | TwinSpires | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Adjusted EBITDA | 12.9 | 22.1 | 24.6 | 23.1 | 82.7 | 115.9 |
| Operating Segments | Gaming | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Adjusted EBITDA | 99 | 110.7 | 119.8 | 82.4 | 411.9 | 173.1 |
| All Other | ||||||
| Segment Reporting Information [Line Items] | ||||||
| Adjusted EBITDA | $ (15.5) | $ (4.4) | $ (9.5) | $ (13.2) | $ (42.6) | $ (41.6) |
