Accounts Receivable - Allowance for Doubtful Accounts (Details) - Allowance for doubtful accounts - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary of activity in the Company's allowance for doubtful accounts
Balance at Beginning of Period	$ 3.8	$ 4.7	$ 7.9
Additions Charged to Expense	1.3	0.7	0.5
Deductions Amounts Written Off	(1.9)	(1.7)	(4.4)
Foreign Currency Impact	0.2	0.1	0.7
Balance at End of Period	$ 3.4	$ 3.8	$ 4.7