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Discontinued Operations - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Net pretax actuarial gain and prior service credit $ 2.2 $ 2.9  
After-tax actuarial gain and prior service credit 1.0 1.7  
Payments of other discontinued reserves 31.6 30.6 $ 21.0
Workers’ compensation, product liability, and indemnification reserves      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Payments of other discontinued reserves 3.1 2.4 1.6
Postretirement medical and life insurance benefits reserve, net      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Payments of other discontinued reserves 0.2 0.3 0.4
Reserves for legal proceedings      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Payments of other discontinued reserves $ 28.3 $ 27.9 $ 19.0