Business Segment Information Hussman Segment Operating Results (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2009
Segment Reporting Information [Line Items]
Net revenues	$ 14,782.0		$ 14,001.1	$ 13,009.1
Hussmann Divestiture [Member]
Segment Reporting Information [Line Items]
Net revenues	818.5	[1]	1,106.1	1,008.9
Segment Operating Income	$ 58.6	[1]	$ 84.4	$ 19.4

[1] Results represent the operating results of Hussmann Business and Branches through their respective divestiture transaction dates.