Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2012		Sep. 30, 2011
Service Experts [Member]
Summary of net trade sales and pre-tax operating losses
Net trade sales	$ 98.3	[1]	$ 120.4	[1]	$ 292.6	[1]	$ 346.6	[1]
Pre-tax operating (loss) income	(26.8)	[1],[2]	0.1	[1],[2]	(42.7)	[1],[2]	(8.3)	[1],[2]
Hearth [Member]
Summary of net trade sales and pre-tax operating losses
Net trade sales	0		19.8		23.5		61.1
Pre-tax operating (loss) income	(1.2)	[2]	(2.3)	[2]	(13.1)	[2]	(9.7)	[2]
Gain (loss) on sale	$ 2.9		$ 0		$ (0.9)		$ 0

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

[2] Pre-tax operating loss includes a $6.3 million first quarter 2012 pre-tax charge for the write-down of net assets to their estimated fair value and a $6.3 million settlement charge in the second quarter of 2012 related to actuarial losses recognized upon transition of a pension obligation to the acquirer of the Hearth business (See Note 8). Offsetting these charges was a $3.5 million gain in the second quarter of 2012 related to realized foreign currency translation adjustments.