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Discontinued Operations - Results of Operations (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Operating expenses:        
Income from discontinued operations, including gain on sale, net of tax $ 0.0 $ 0.7 $ 11.4 $ 13.9
Discontinued operations | Engineered Materials Segment        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations        
Net sales   51.8 2.0 166.6
Cost of sales   34.9 1.3 109.1
Gross profit   16.9 0.7 57.5
Operating expenses:        
Selling, general and administrative   13.0 0.4 39.3
Other   0.0 0.0 0.2
Total operating expenses   13.0 0.4 39.5
Income from discontinued operation before income tax   3.9 0.3 18.0
Income tax expense   (3.2) (0.1) (4.1)
Income from discontinued operations, net of tax   0.7 0.2 13.9
Gain from sale of discontinued operation, net of tax   0.0 11.2 0.0
Income from discontinued operations, including gain on sale, net of tax   $ 0.7 $ 11.4 $ 13.9