Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Service Experts [Member]
Summary of net trade sales and pre-tax operating losses
Net trade sales	$ 0	$ 73.5
Pre-tax operating income (loss)	0	(15.1)
Gain on sale of business	(0.1)	1.7
Hearth [Member]
Summary of net trade sales and pre-tax operating losses
Net trade sales	0	0
Pre-tax operating income (loss)	0	0.1
Gain on sale of business	$ 0.1	$ 0