Pension and Other Post-Retirement Benefits - Fair Value Pension Plan Assets (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Fair value of pension plan assets
Assets	$ 325.0	$ 328.8
Short-term investment funds [Member]
Fair value of pension plan assets
Assets	18.5	0.7
Common stock collective funds [Member]
Fair value of pension plan assets
Assets	107.5	127.4
Fixed income collective trust funds [Member]
Fair value of pension plan assets
Assets	192.6	193.7
Real estate investment funds [Member]
Fair value of pension plan assets
Assets	$ 6.4	$ 7.0