Segment Information - Schedule of Equity in Income (Losses) of Unconsolidated Investments Included in Reported Segments (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting, Other Significant Reconciling Item [Line Items]
Assets	$ 6,206.8	$ 2,981.6
Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Assets	5,457.5	1,975.6
All Other
Segment Reporting, Other Significant Reconciling Item [Line Items]
Assets	749.3	1,006.0
Live and Historical Racing | Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Assets	3,345.4	682.7
TwinSpires | Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Assets	287.9	289.6
Gaming | Operating Segments
Segment Reporting, Other Significant Reconciling Item [Line Items]
Assets	$ 1,824.2	$ 1,003.3