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Discontinued Operations - Results of Discontinued Operations (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Impairment charges $ (1.5) $ 0.0 $ (5.2)
Superform U.S Business | Discontinued Operations, Held-for-sale      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Net sales 20.9 53.2 70.1
Cost of goods sold (21.8) (51.5) (65.8)
Gross (loss) / profit (0.9) 1.7 4.3
Selling, general and administrative expenses (2.9) (5.8) (5.3)
Restructuring charges (1.0) (0.1) (0.1)
Impairment charges (1.5) 0.0 (5.2)
Other income 0.0 3.4 0.0
Operating loss (6.3) (0.8) (6.3)
Net interest expense 0.0 0.0 (0.2)
Net loss before income taxes (6.3) (0.8) (6.5)
Provision for income taxes (0.4) 0.0 0.9
Net loss $ (6.7) $ (0.8) $ (5.6)