Pension and Postretirement Plans - Schedule of Pension and Postretirement Costs Benefit (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	$ 0.0	$ 0.0	$ 0.0
Other components of pension and postretirement benefit plans expense:
Interest cost on projected benefit obligation	18.8	22.0	16.3
Expected return on plan assets	(21.0)	(20.8)	(27.5)
Amortization of:
Prior service benefit	0.0	0.0	0.0
Actuarial gain	(0.2)	(0.3)	0.0
Pension settlement gain	(3.5)	0.0	0.0
Pension/postretirement (benefit) cost	(5.9)	0.9	(11.2)
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Service cost	0.4	0.5	0.8
Other components of pension and postretirement benefit plans expense:
Interest cost on projected benefit obligation	5.0	5.2	4.2
Expected return on plan assets	0.0	0.0	0.0
Amortization of:
Prior service benefit	(0.8)	(0.7)	(0.2)
Actuarial gain	(3.8)	(4.7)	(0.6)
Pension settlement gain	0.0	0.0	0.0
Pension/postretirement (benefit) cost	$ 0.8	$ 0.3	$ 4.2