Business Segment Information Business Segments Narrative (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				12 Months Ended
	Mar. 31, 2012		Mar. 31, 2011		Dec. 31, 2011
Gain (loss) on sale/asset impairment	$ 0.3		$ (186.3)
Hussmann Divestiture [Member]
Gain (loss) on sale/asset impairment	$ 0.3	[1]	$ (186.3)	[1]	$ (646.9)

[1] * During the three months ended March 31, 2011, the Company recorded a pre-tax asset impairment charge related to the Hussmann divestiture totaling $186.3 million. During the three months ended March 31, 2012, the Company recorded $0.3 million of purchase price adjustments related to the Hussmann sale. These amounts have been excluded from Segment operating income within the Climate Solutions segment as management excludes these charges from Operating income when making operating decisions about the business.