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Discontinued Operations - Reserves for Discontinued Operations (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Workers’ compensation, product liability, and indemnification reserves $ 2.3 $ 3.4
Reserve for discontinued operations 135.6 127.2
Non-operating pension and postretirement charges (income); Discontinued operations, net of income taxes    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Workers’ compensation, product liability, and indemnification reserves 7.3 8.0
Postretirement medical and life insurance benefits reserve, net 4.4 4.7
Reserves for legal proceedings 123.9 114.5
Reserve for discontinued operations $ 135.6 $ 127.2