Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Summary of net trade sales and pre-tax operating losses
Pre-tax operating income (loss)	$ (3.7)		$ (13.3)		$ (64.9)
Service Experts [Member]
Summary of net trade sales and pre-tax operating losses
Net trade sales	0	[1]	73.5	[1]	385.1	[1]
Pre-tax operating income (loss)	2.6	[2]	(15.1)	[2]	(50.8)	[2]
Gain (loss) on sale of disposal group	0		1.4		0
Hearth [Member]
Summary of net trade sales and pre-tax operating losses
Net trade sales	0		0		23.5
Pre-tax operating income (loss)	(6.3)	[2]	0.5	[2]	(13.7)	[2]
Gain (loss) on sale of disposal group	$ 0		$ 0		$ (0.9)

[1] Excludes eliminations of intercompany sales and any associated profit.

[2] Pre-tax operating loss in 2012 included a $6.3 million pre-tax impairment charge for the write-down of net assets to their estimated fair value, a $6.3 million settlement charge related to actuarial losses recognized upon transition of a pension obligation to the acquirer of the Hearth business and a $3.5 million gain related to realized foreign currency translation adjustments.