Pensions and Postretirement Benefits - Summary of Pension Plan Asset Allocation By Level (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	$ 147.9	$ 131.5
Common stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	22.3	24.3
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	58.3	47.1
Foreign stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	4.7	4.9
U.S. Government obligations
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	9.2	6.9
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	3.0	4.0
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	11.7	10.5
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	6.5	7.7
Common collective trusts
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	11.4	7.1
Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	24.2	22.6
Postretirement benefit assets
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	(3.4)	(3.6)
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	115.7	105.4
Level 1 | Common stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	22.3	24.3
Level 1 | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	58.3	47.1
Level 1 | Foreign stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	4.7	4.9
Level 1 | U.S. Government obligations
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	9.2	6.9
Level 1 | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	3.0	4.0
Level 1 | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	11.7	10.5
Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	$ 6.5	$ 7.7