Benefit Plans - Net Periodic Benefit Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension Benefits [Member]
Benefit Plans [Abstract]
Service cost	$ 3.8	$ 4.2	$ 4.5
Interest cost	16.5	16.0	16.0
Expected return on plan assets	(21.9)	(19.8)	(17.8)
Recognized net actuarial (gain) loss	1.1	1.5	2.9
Settlement/curtailment (gain) loss	(0.1)	0.0	0.1
Net periodic (benefit) cost	(0.6)	1.9	5.7
Postretirement Benefits [Member]
Benefit Plans [Abstract]
Service cost	0.0	0.0	0.0
Interest cost	0.1	0.1	0.1
Expected return on plan assets	0.0	0.0	0.0
Recognized net actuarial (gain) loss	(0.4)	(0.4)	(0.5)
Settlement/curtailment (gain) loss	0.0	0.0	0.0
Net periodic (benefit) cost	$ (0.3)	$ (0.3)	$ (0.4)