Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
U.S. federal income taxes (including foreign withholding taxes):
Current federal income taxes	$ 154.5	$ 97.6	$ 168.0
Deferred federal income taxes	(35.8)	(16.2)	(34.9)
Total federal income taxes	118.7	81.4	133.1
State and local income taxes:
Current state and local income taxes	42.3	40.4	40.4
Deferred state and local income taxes	5.3	4.3	(5.3)
Total state and local income taxes	47.6	44.7	35.1
Foreign income taxes:
Current foreign income taxes	165.2	148.1	137.0
Deferred foreign income taxes	2.4	17.0	13.2
Total foreign income taxes	167.6	165.1	150.2
Provision for income taxes	$ 333.9	$ 291.2	$ 318.4