Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Service Experts [Member]
Summary of net trade sales and pre-tax operating losses
Net trade sales	$ 0	$ 112.4	$ 73.5	$ 194.3
Pre-tax operating income (loss)	(0.4)	(1.6)	(15.5)	(15.9)
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	4.9	0	23.5
Pre-tax operating income (loss)	0.4	(3.4)	0.5	(11.9)
Gain on sale of business		$ (3.8)		$ (3.8)