Income Taxes - Income Tax Expense by Component (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Current:
Federal	$ 267.4	$ 267.3	$ 281.8
State	72.8	69.7	75.8
Foreign	31.5	41.6	33.9
Total current	371.7	378.6	391.5
Deferred:
Domestic	(14.0)	(29.3)	(15.0)
Foreign	(0.1)	(3.4)	(3.2)
Total deferred	(14.1)	(32.7)	(18.2)
Income tax expense	$ 357.6	$ 345.9	$ 373.3