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Discontinued Operations - Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Disposal Group, Including Discontinued Operation, Assets [Abstract]    
Held-for-sale assets $ 8.5 $ 36.0
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]    
Current liabilities 1.4 11.4
Discontinued Operations, Held-for-sale | Superform U.S Business    
Disposal Group, Including Discontinued Operation, Assets [Abstract]    
Accounts and other receivables 2.1 8.7
Inventories 2.7 12.6
Held-for-sale assets 4.8 21.3
Property, plant and equipment 0.0 7.9
Right-of-use assets 0.0 3.1
Total assets 4.8 32.3
Disposal Group, Including Discontinued Operation, Liabilities [Abstract]    
Accounts payable 0.5 4.3
Accrued liabilities 0.1 1.5
Other current liabilities 0.8 1.5
Current liabilities 1.4 7.3
Other non-current liabilities 0.0 4.1
Total liabilities $ 1.4 $ 11.4