Business Segment Information Hussmann Divestiture Operating Results (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues	$ 3,150.7	$ 3,273.8
Segment operating income (loss)	244.7	258.4
Hussmann Divestiture(Included in Climate Solutions) [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenues		213.1
Segment operating income (loss)		$ (4.0)