Benefit Plans and Other Postretirement Benefits, Pension plans with an accumulated benefit obligation in excess of plan assets (Details) - Pension Benefits - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
United States
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Accumulated benefit obligation	$ 22.1	$ 23.1
Fair value of plan assets	8.6	9.1
Foreign Plans
Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Accumulated benefit obligation	88.3	142.3
Fair value of plan assets	$ 17.7	$ 57.0