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Discontinued Operations - Reserves for Discontinued Operations (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Workers' compensation, product liability, and indemnification reserves $ 3.4 $ 6.1
Reserve for discontinued operations 127.2 108.3
Discontinued Operations    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Workers' compensation, product liability, and indemnification reserves 8.0 10.2
Postretirement medical and life insurance benefits reserve, net 4.7 4.7
Reserves for legal proceedings 114.5 93.4
Reserve for discontinued operations $ 127.2 $ 108.3