Business Segment Information (Summary of Operations by Reportable Segments) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Net revenues	$ 3,932.7		$ 3,821.3		$ 7,045.1		$ 6,972.0
Segment operating income	559.5		507.0		808.5		751.7
Gain (loss) on sale/asset impairment	0		4.2		0		4.5
Operating income	483.0		477.9		676.5		689.9
Climate Solutions [Member]
Net revenues	2,058.2		1,967.1		3,674.6		3,628.9
Segment operating income	271.1	[1]	238.5	[1]	352.2	[1]	332.6
Residential Solutions [Member]
Net revenues	713.0		652.5		1,177.0		1,074.1
Segment operating income	79.8		51.7		86.7		41.0
Industrial Technologies [Member]
Net revenues	762.9		790.3		1,443.2		1,479.0
Segment operating income	122.4		134.4		224.6		225.9
Security Technologies [Member]
Net revenues	398.6		411.4		750.3		790.0
Segment operating income	86.2		82.4		145.0		152.2
Unallocated Amount to Segment [Member]
Unallocated corporate expense	76.5		33.3		132.0		66.3
Hussmann Divestiture(Included in Climate Solutions) [Member]
Gain (loss) on sale/asset impairment	$ 0	[1]	$ 4.2	[1]	$ 0	[1]	$ 4.5	[1]

[1] During the three and six months ended June 30, 2012, the Company recorded $4.2 million and $4.5 million of purchase price adjustments, respectively, 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.