Acquisitions and Dispositions - Actual and Pro Forma Financial Results (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Actual financial results of acquiree since acquisition date
Net income	$ 123.2	$ 86.1	$ 200.9	$ 375.7
Hitpoint, Perryville, Sam Houston And theScore
Actual financial results of acquiree since acquisition date
Revenues		1,517.5		4,404.3
Net income		$ 60.9		$ 288.6