Segment Information - Schedule of Adjusted EBITDA by Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Segment Reporting Information [Line Items]
Equity in income of unconsolidated affiliates	$ 33.3	$ 37.8
Adjusted EBITDA	245.1	242.5
Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBITDA	266.8	263.2
Live and Historical Racing | Operating Segments
Segment Reporting Information [Line Items]
Revenues	276.4	248.9
Pari-mutuel taxes and purses	(71.9)	(63.6)
Gaming taxes	(1.5)	(1.4)
Marketing and advertising	(13.8)	(9.3)
Salaries and benefits	(32.7)	(26.8)
Content expense	(1.4)	(1.3)
Selling, general and administrative expense	(10.5)	(8.8)
Maintenance, insurance and utilities	(10.4)	(10.3)
Gaming equipment rental and technology costs	(11.8)	(10.1)
Food and beverage costs	(3.6)	(3.1)
Other operating expense	(16.9)	(13.4)
Equity in income of unconsolidated affiliates	0.0	0.0
Other income	0.1	0.0
Adjusted EBITDA	102.0	100.8
Wagering Services and Solutions | Operating Segments
Segment Reporting Information [Line Items]
Revenues	115.8	114.1
Pari-mutuel taxes and purses	(4.4)	(4.1)
Gaming taxes	(0.4)	(0.8)
Marketing and advertising	(1.4)	(1.2)
Salaries and benefits	(8.1)	(7.9)
Content expense	(43.7)	(44.0)
Selling, general and administrative expense	(5.2)	(4.5)
Maintenance, insurance and utilities	(0.9)	(1.0)
Gaming equipment rental and technology costs	(0.7)	(1.0)
Food and beverage costs	0.0	0.0
Other operating expense	(9.7)	(10.0)
Equity in income of unconsolidated affiliates	0.0	0.0
Other income	0.0	0.0
Adjusted EBITDA	41.3	39.6
Gaming | Operating Segments
Segment Reporting Information [Line Items]
Revenues	267.2	243.2
Pari-mutuel taxes and purses	(14.6)	(14.2)
Gaming taxes	(72.4)	(66.3)
Marketing and advertising	(8.2)	(7.8)
Salaries and benefits	(44.3)	(38.0)
Content expense	(1.8)	(1.8)
Selling, general and administrative expense	(11.1)	(10.2)
Maintenance, insurance and utilities	(9.5)	(9.6)
Gaming equipment rental and technology costs	(4.2)	(3.3)
Food and beverage costs	(4.2)	(3.8)
Other operating expense	(16.8)	(14.6)
Equity in income of unconsolidated affiliates	43.2	47.5
Other income	0.2	1.7
Adjusted EBITDA	$ 123.5	$ 122.8