Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Trade receivable allowances
Valuation and Qualifying Accounts and Reserves
Balance at Beginning of Period	$ 4.5	$ 4.0	$ 3.3
Charged to Costs and Expenses	2.0	1.5	1.5
Deductions and Other	(0.3)	(1.0)	(0.8)
Balance at End of Period	6.2	4.5	4.0
Inventory obsolescence reserve
Valuation and Qualifying Accounts and Reserves
Balance at Beginning of Period	29.8	30.2	29.0
Charged to Costs and Expenses	7.5	5.6	6.0
Deductions and Other	(2.4)	(6.0)	(4.8)
Balance at End of Period	34.9	29.8	30.2
Tax valuation allowances
Valuation and Qualifying Accounts and Reserves
Balance at Beginning of Period	11.6	5.3	4.8
Charged to Costs and Expenses	(6.3)	5.6	0.5
Deductions and Other	0.0	0.7	0.0
Balance at End of Period	$ 5.3	$ 11.6	$ 5.3