Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Service Experts [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net trade sales	$ 0.0	$ 0.0	$ 0.0	$ 0.0
Pre-tax operating income (loss)	(0.8)	1.2	(0.8)	1.1
Gain (loss) on sale of business	0.0	0.0	0.0	0.0
Hearth [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net trade sales	0.0	0.0	0.0	0.0
Pre-tax operating income (loss)	0.1	(2.3)	0.0	(2.2)
Gain (loss) on sale of business	$ 0.0	$ 0.0	$ 0.0	$ 0.0