Schedule II - Valuation and Qualifying Accounts and Reserves (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Trade receivable allowances
Valuation and Qualifying Accounts and Reserves
Balance at Beginning of Period	$ 4.0	$ 3.3	$ 4.1
Charged to Costs and Expenses	1.5	1.5	0.4
Deductions and Other	(1.0)	(0.8)	(1.2)
Balance at End of Period	4.5	4.0	3.3
Inventory obsolescence reserve
Valuation and Qualifying Accounts and Reserves
Balance at Beginning of Period	30.2	29.0	29.9
Charged to Costs and Expenses	5.6	6.0	4.2
Deductions and Other	(6.0)	(4.8)	(5.1)
Balance at End of Period	29.8	30.2	29.0
Tax valuation allowances
Valuation and Qualifying Accounts and Reserves
Balance at Beginning of Period	5.3	4.8	7.1
Charged to Costs and Expenses	5.6	0.5	(0.7)
Deductions and Other	0.7	0.0	(1.6)
Balance at End of Period	$ 11.6	$ 5.3	$ 4.8