Business Segment Information (Summary of Operations by Reportable Segments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012
Net revenues	$ 3,749.5		$ 3,592.8		$ 10,794.5		$ 10,564.7
Segment operating income	565.8		482.9		1,374.2		1,234.6
Gain (loss) on sale/asset impairment	(111.4)		0		(111.4)		4.5
Operating income	376.6		447.8		1,053.0		1,137.7
Climate Solutions [Member]
Net revenues	2,025.8		1,941.7		5,700.4		5,570.6
Segment operating income	279.8	[1]	247.0	[1]	632.0	[1]	579.6
Residential Solutions [Member]
Net revenues	609.5		558.6		1,786.5		1,632.7
Segment operating income	66.0		45.4		152.6		86.3
Industrial Technologies [Member]
Net revenues	721.9		701.6		2,165.1		2,180.6
Segment operating income	116.2		106.6		340.8		332.5
Security Technologies [Member]
Net revenues	392.3		390.9		1,142.5		1,180.8
Segment operating income	103.8		83.9		248.8		236.2
Unallocated Amount to Segment [Member]
Unallocated corporate expense	77.8		35.1		209.8		101.4
Hussmann Divestiture(Included in Climate Solutions) [Member]
Gain (loss) on sale/asset impairment	$ (111.4)	[1]	$ 0	[1]	$ (111.4)	[1]	$ 4.5	[1]

[1] During the nine months ended September 30, 2012, the Company recorded $4.5 million of purchase price adjustments related to the 2011 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.