Goodwill (Details) (USD $) In Millions	3 Months Ended	9 Months Ended
	Dec. 31, 2008	Sep. 30, 2011		Dec. 31, 2010
Goodwill [Roll Forward]
Beginning balance (gross)		$ 8,992.8
Acquisitions and adjustments		(14.4)	[1]
Currency translation		21.4
Ending balance (gross)		8,999.8
Accumulated Impairment		(2,840.0)	[2]
Goodwill (net)		6,159.8		6,152.8
Pre-tax, non-cash charge related to goodwill impairment	2,840.0
Climate Solutions [Member]
Goodwill [Roll Forward]
Beginning balance (gross)		5,381.8
Acquisitions and adjustments		(8.7)	[1]
Currency translation		13.6
Ending balance (gross)		5,386.7
Accumulated Impairment		(839.8)	[2]
Goodwill (net)		4,546.9
Residential Solutions [Member]
Goodwill [Roll Forward]
Beginning balance (gross)		2,326.4
Acquisitions and adjustments		(5.7)	[1]
Currency translation		0
Ending balance (gross)		2,320.7
Accumulated Impairment		(1,656.2)	[2]
Goodwill (net)		664.5
Industrial Technologies [Member]
Goodwill [Roll Forward]
Beginning balance (gross)		368.1
Acquisitions and adjustments		(0.3)
Currency translation		1.7
Ending balance (gross)		369.5
Accumulated Impairment		0	[2]
Goodwill (net)		369.5
Security Technologies [Member]
Goodwill [Roll Forward]
Beginning balance (gross)		916.5
Acquisitions and adjustments		0.3
Currency translation		6.1
Ending balance (gross)		922.9
Accumulated Impairment		(344.0)	[2]
Goodwill (net)		$ 578.9

[1] During 2011 the Company corrected certain purchase accounting errors within the Climate Solutions and Residential Solutions sectors.

[2] Accumulated impairment relates to a charge of $2,840.0 million recorded in the fourth quarter of 2008 as a result of the Company’s annual impairment testing.