Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Service Experts [Member]
Summary of net trade sales and pre-tax operating losses
Net trade sales	$ 0	$ 98.3	$ 73.5	$ 292.6
Pre-tax operating income (loss)	(2.3)	(26.8)	(17.8)	(42.7)
Gain on sale of business	0	0	1.7	0
Hearth [Member]
Summary of net trade sales and pre-tax operating losses
Net trade sales	0	0	0	23.5
Pre-tax operating income (loss)	0	(1.2)	0.5	(13.1)
Gain on sale of business	$ 0	$ 2.9	$ 0	$ (0.9)