Segment Information - Net Revenue From External Customers and Intercompany Revenue From Each Operating Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Segment Reporting Information [Line Items]
Net revenue	$ 683.0	$ 628.5	$ 2,260.0	$ 2,110.1
External Customer
Segment Reporting Information [Line Items]
Net revenue	683.0	628.5	2,260.0	2,110.1
Operating Segments | Live and Historical Racing
Segment Reporting Information [Line Items]
Net revenue	300.0	247.5	1,082.4	957.3
Operating Segments | Wagering Services and Solutions
Segment Reporting Information [Line Items]
Net revenue	118.0	111.3	383.3	369.6
Operating Segments | Gaming
Segment Reporting Information [Line Items]
Net revenue	265.0	269.7	794.2	783.1
Operating Segments | External Customer
Segment Reporting Information [Line Items]
Net revenue	683.0	628.5	2,259.9	2,110.0
Operating Segments | External Customer | Live and Historical Racing
Segment Reporting Information [Line Items]
Net revenue	300.0	247.5	1,082.4	957.3
Operating Segments | External Customer | Wagering Services and Solutions
Segment Reporting Information [Line Items]
Net revenue	118.0	111.3	383.3	369.6
Operating Segments | External Customer | Gaming
Segment Reporting Information [Line Items]
Net revenue	265.0	269.7	794.2	783.1
All Other
Segment Reporting Information [Line Items]
Net revenue	0.0	0.0	0.1	0.1
All Other | External Customer
Segment Reporting Information [Line Items]
Net revenue	$ 0.0	$ 0.0	$ 0.1	$ 0.1