Income Taxes - Provision (Benefit) For Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current:
Federal	$ 372.7	$ 331.9	$ 8.0
State and local	21.6	31.8	4.8
Foreign	76.9	73.8	43.3
Current, Provision (benefit) for income taxes	471.2	437.5	56.1
Deferred:
Federal	(107.9)	(36.9)	89.2
State and local	13.2	25.7	7.8
Foreign	(26.3)	32.1	(6.5)
Deferred, Provision (benefit) for income taxes	(121.0)	20.9	90.5
Total provision	$ 350.2	$ 458.4	$ 146.6