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Accounts Receivable (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Accounts Receivable [Line Items]    
Less allowance for doubtful accounts and sales discounts $ (1.1) $ (1.5)
Total accounts receivable, net 148.5 143.2
Trade receivables    
Accounts Receivable [Line Items]    
Accounts receivable, gross 130.9 114.6
Business tax credits, including VAT    
Accounts Receivable [Line Items]    
Accounts receivable, gross 4.0 5.2
Hedge contracts receivable    
Accounts Receivable [Line Items]    
Accounts receivable, gross 0.3 4.9
Other receivables    
Accounts Receivable [Line Items]    
Accounts receivable, gross $ 14.4 $ 20.0