Retirement Plans - Amount Recognized on Consolidated and Combined Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit cost (included in accrued liabilities)	$ (14.0)	$ (2.3)
Pension and other postretirement benefits plan liabilities	(23.3)	(34.4)
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit cost (included in accrued liabilities)	(13.9)	(2.1)
Pension and other postretirement benefits plan liabilities	(22.2)	(33.2)
Net liabilities	(36.1)	(35.3)
Other Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Accrued benefit cost (included in accrued liabilities)	(0.1)	(0.1)
Pension and other postretirement benefits plan liabilities	(1.1)	(1.2)
Net liabilities	$ (1.2)	$ (1.3)