Pensions and Postretirement Benefits - Summary of Pension Plan Asset Allocation By Level (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	$ 131.5	$ 169.9
Common stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	24.3	32.4
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	47.1	65.3
Foreign stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	4.9	7.8
U.S. Government obligations
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	6.9	8.9
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	4.0	6.4
Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	10.5	14.9
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	7.7	6.8
Common collective trusts
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	7.1	5.8
Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	22.6	26.1
Postretirement benefit assets
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	(3.6)	(4.5)
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	105.4	142.5
Level 1 | Common stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	24.3	32.4
Level 1 | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	47.1	65.3
Level 1 | Foreign stock
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	4.9	7.8
Level 1 | U.S. Government obligations
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	6.9	8.9
Level 1 | Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	4.0	6.4
Level 1 | Corporate bonds
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	10.5	14.9
Level 1 | Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of pension plan assets	$ 7.7	$ 6.8