Discontinued Operations (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended			0 Months Ended	6 Months Ended			1 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Mar. 22, 2013 Service Experts [Member]	Jun. 30, 2013 Service Experts [Member]	Jun. 30, 2013 Service Experts [Member] Goodwill in assets of discontinued operations [Member]	Dec. 31, 2012 Service Experts [Member] Goodwill in assets of discontinued operations [Member]	Apr. 30, 2012 Hearth [Member]
Discontinued Operations (Textual) [Abstract]
Goodwill	$ 217.6				$ 217.6		$ 223.8				$ 66.0
Goodwill impairment										0
Net proceeds from sale of discontinued operations								10.4				10.1
Working capital adjustment included in net proceeds from sale of discontinued operations								3.8
Sale of equipment					0	0.1
Severance expense									2.3
Stock-based compensation expense	$ 7.5	[1]	$ 4.0	[1]	$ 15.2	$ 7.8			$ 0.2

[1] Stock-Based Compensation expense is recorded in our Corporate and other business segment.