Segment Information - Schedule of Adjusted EBITDA by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting Information [Line Items]
Equity in income of unconsolidated affiliates	$ 37.1	$ 37.7	$ 70.4	$ 75.5
Adjusted EBITDA	450.9	444.8	696.0	687.3
Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBITDA	471.8	466.1	738.6	729.3
Live and Historical Racing | Operating Segments
Segment Reporting Information [Line Items]
Revenues	540.9	490.2	817.3	739.1
Pari-mutuel taxes and purses	(115.8)	(98.4)	(187.7)	(162.0)
Gaming taxes	(1.4)	(1.6)	(2.9)	(3.0)
Marketing and advertising	(15.7)	(12.5)	(29.5)	(21.8)
Salaries and benefits	(37.0)	(36.5)	(69.7)	(63.3)
Content expense	(1.9)	(2.1)	(3.3)	(3.4)
Selling, general and administrative expense	(10.8)	(8.5)	(21.3)	(17.3)
Maintenance, insurance and utilities	(11.2)	(11.5)	(21.6)	(21.8)
Gaming equipment rental and technology costs	(12.6)	(10.5)	(24.4)	(20.6)
Food and beverage costs	(3.9)	(3.3)	(7.5)	(6.4)
Other operating expense	(34.1)	(26.3)	(51.0)	(39.7)
Equity in income of unconsolidated affiliates	0.0	0.0	0.0	0.0
Other income	0.0	0.2	0.1	0.2
Adjusted EBITDA	296.5	279.2	398.5	380.0
Wagering Services and Solutions | Operating Segments
Segment Reporting Information [Line Items]
Revenues	168.4	159.9	284.2	274.0
Pari-mutuel taxes and purses	(7.7)	(6.8)	(12.1)	(10.9)
Gaming taxes	(0.5)	(0.5)	(0.9)	(1.3)
Marketing and advertising	(5.2)	(4.9)	(6.6)	(6.1)
Salaries and benefits	(9.0)	(8.0)	(17.1)	(15.9)
Content expense	(76.9)	(73.3)	(120.6)	(117.3)
Selling, general and administrative expense	(4.7)	(4.3)	(9.9)	(8.8)
Maintenance, insurance and utilities	(1.1)	(1.0)	(2.0)	(2.0)
Gaming equipment rental and technology costs	(0.8)	(0.7)	(1.5)	(1.7)
Food and beverage costs	0.0	0.0	0.0	0.0
Other operating expense	(14.5)	(14.2)	(24.2)	(24.2)
Equity in income of unconsolidated affiliates	0.0	0.0	0.0	0.0
Other income	0.0	0.0	0.0	0.0
Adjusted EBITDA	48.0	46.2	89.3	85.8
Gaming | Operating Segments
Segment Reporting Information [Line Items]
Revenues	266.3	274.4	533.5	517.6
Pari-mutuel taxes and purses	(7.5)	(9.5)	(22.1)	(23.7)
Gaming taxes	(80.0)	(74.0)	(152.4)	(140.3)
Marketing and advertising	(8.8)	(9.2)	(17.0)	(17.0)
Salaries and benefits	(42.7)	(40.3)	(87.0)	(78.3)
Content expense	(2.6)	(2.6)	(4.4)	(4.4)
Selling, general and administrative expense	(10.6)	(11.8)	(21.7)	(22.0)
Maintenance, insurance and utilities	(9.7)	(11.1)	(19.2)	(20.7)
Gaming equipment rental and technology costs	(4.4)	(4.2)	(8.6)	(7.5)
Food and beverage costs	(4.1)	(4.3)	(8.3)	(8.1)
Other operating expense	(15.7)	(15.0)	(32.5)	(29.6)
Equity in income of unconsolidated affiliates	46.7	48.2	89.9	95.7
Other income	0.4	0.1	0.6	1.8
Adjusted EBITDA	$ 127.3	$ 140.7	$ 250.8	$ 263.5