Income Taxes (Reconciliation Between Federal Statutory Tax Rate and Effective Tax Rates) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Tax at U.S. statutory rate	$ 14.3	$ 24.5	$ 25.1
Effect of state income taxes, net	0.2	0.6	1.4
Effect of foreign operations	(2.1)	(1.6)	(0.9)
Valuation allowance	0.5	(0.7)	(1.1)
Uncertain tax positions	(4.0)	0.1	0.3
Non-deductible items	0.6	0.5	1.0
Non-deductible compensation	0.8	1.2	0.8
Manufacturer's deduction	(0.5)	(1.1)	(1.4)
Other, net	(1.0)	(2.2)	(0.3)
Income tax expense	$ 8.8	$ 21.3	$ 24.9