Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Service Experts [Member]
Summary of net trade sales and pre-tax operating losses
Net trade sales	$ 0	$ 0	$ 0	$ 73.5
Pre-tax operating income (loss)	1.2	(0.4)	1.1	(15.5)
Gain on sale of business	0	0	0	1.7
Hearth [Member]
Summary of net trade sales and pre-tax operating losses
Net trade sales	0	0	0	0
Pre-tax operating income (loss)	(2.3)	0.4	(2.2)	0.5
Gain on sale of business	$ 0	$ 0	$ 0	$ 0