| **Discontinued Operations - Additional Information (Details) $ in Millions**                                                      | Mar. 25, 2021 USD ($) | Jun. 30, 2022 USD ($) | Jun. 17, 2022 USD ($) a | Dec. 31, 2021 USD ($) | Sep. 29, 2021 USD ($) a |
|-----------------------------------------------------------------------------------------------------------------------------------|-----------------------|-----------------------|-------------------------|-----------------------|-------------------------|
| Kater And Thimmegowda Litigation                                                                                                  |                  |                  |                    |                  |                    |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |                  |                  |                    |                  |                    |
| Litigation settlement                                                                                                             | $ 124.0               |                  |                    |                  |                    |
| Arlington Property | Disposal Group, Held-for-sale, Not Discontinued Operations                                                   |                  |                  |                    |                  |                    |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |                  |                  |                    |                  |                    |
| Area of land | a                                                                                                                  |                  |                  |                    |                  | 326                     |
| Purchase price                                                                                                                    |                  |                  |                    |                  | $ 197.2                 |
| Arlington International Racecourse | Disposal Group, Held-for-sale, Not Discontinued Operations                                   |                  |                  |                    |                  |                    |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |                  |                  |                    |                  |                    |
| Asset held for sale                                                                                                               |                  | $ 82.9                |                    | $ 81.5                |                    |
| Calder Property | Disposal Group, Held-for-sale, Not Discontinued Operations                                                      |                  |                  |                    |                  |                    |
| **Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]** |                  |                  |                    |                  |                    |
| Area of land | a                                                                                                                  |                  |                  | 115.7                   |                  |                    |
| Purchase price                                                                                                                    |                  |                  | $ 291.0                 |                  |                    |
| Asset held for sale                                                                                                               |                  |                  | $ 4.4                   |                  |                    |

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