Accrued Warranty Costs (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Changes in product warranty liability [Roll Forward]
Balance at beginning of period	$ 6.9	$ 5.4
Claims paid	(2.6)	(2.0)
Warranty expense, net	1.8	1.9
Balance at end of period	$ 6.1	$ 5.3