Accrued Warranty Costs (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Changes in product warranty liability [Roll Forward]
Balance at beginning of period	$ 6.1	$ 6.9
Claims paid	(1.7)	(2.6)
Warranty expense, net	1.1	1.8
Balance at end of period	$ 5.5	$ 6.1