Divestitures and Discontinued Operations (Narrative) (Details) (USD $)	3 Months Ended							12 Months Ended	3 Months Ended		12 Months Ended	1 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012 Hussmann Divestiture [Member]		Sep. 30, 2011 Hussmann Divestiture [Member]	Mar. 31, 2011 Hussmann Divestiture [Member]		Dec. 31, 2011 Hussmann Divestiture [Member]	Mar. 31, 2012 Integration business divestiture [Member]	Mar. 31, 2011 Integration business divestiture [Member]	Dec. 31, 2011 Integration business divestiture [Member]	Apr. 30, 2012 Compact Equipment [Member]	Jun. 30, 2011 Compact Equipment [Member]	Dec. 31, 2007 Compact Equipment [Member]
Gain (loss) on sale/asset impairment	$ 300,000	$ (186,300,000)	$ 300,000	[1]		$ (186,300,000)	[1]	$ (646,900,000)
Cash proceeds, before purchase price adjustments					370,000,000
Hussmann parent initial ownership interest, hussmann business					60.00%
IR ownership interest, hussmann parent			38.60%		40.00%
Pre-tax gain (loss) on sale	0	200,000									(6,700,000)
Gain (loss) on sale, net of tax									0	0	(5,000,000)
Gross proceeds from sale of businesses														4,900,000,000
Proceeds for Purchase price adjustments												5,700,000	48,300,000
Settlement For Post Closing Matters												46,500,000
Pending Proceeds From Divestiture Of Interest In Consolidated Subsidiaries Purchase Price Adjustment												$ 40,850,000

[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.