Accounts Receivable (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable [Line Items]
Less allowance for doubtful accounts and sales discounts	$ (1.5)	$ (1.7)
Total accounts receivable, net	143.2	154.6
Trade receivables
Accounts Receivable [Line Items]
Accounts receivable, gross	114.6	130.9
Business tax credits, including VAT
Accounts Receivable [Line Items]
Accounts receivable, gross	5.2	4.0
Hedge contracts receivable
Accounts Receivable [Line Items]
Accounts receivable, gross	4.9	2.1
Other receivables
Accounts Receivable [Line Items]
Accounts receivable, gross	$ 20.0	$ 19.3