Goodwill (Details) (USD $)	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Goodwill, gross, beginning balance	$ 8,990,300,000		$ 9,036,100,000
Acquisitions and adjustments	(11,700,000)	[1]	4,500,000
Currency translation	(33,500,000)		(50,300,000)
Goodwill, gross, ending balance	8,945,100,000		8,990,300,000	9,036,100,000
Goodwill, Accumulated Impairment Loss	(2,840,000,000)	[2]
Goodwill, net	6,105,100,000		6,150,300,000
Goodwill, Impairment Loss	0		0	0	2,840,000,000
Climate Solutions [Member]
Goodwill, gross, beginning balance	5,381,800,000		5,410,700,000
Acquisitions and adjustments	(6,900,000)	[1]	1,200,000
Currency translation	(31,000,000)		(30,100,000)
Goodwill, gross, ending balance	5,343,900,000		5,381,800,000
Goodwill, Accumulated Impairment Loss	(839,800,000)	[2]
Goodwill, net	4,504,100,000
Goodwill, Purchase Accounting Adjustments	7,900,000
Residential Solutions [Member]
Goodwill, gross, beginning balance	2,335,400,000		2,338,500,000
Acquisitions and adjustments	(7,400,000)	[1]	(3,100,000)
Currency translation	0		0
Goodwill, gross, ending balance	2,328,000,000		2,335,400,000
Goodwill, Accumulated Impairment Loss	(1,656,200,000)	[2]
Goodwill, net	671,800,000
Goodwill, Purchase Accounting Adjustments	7,400,000
Industrial Technologies [Member]
Goodwill, gross, beginning balance	368,100,000		372,900,000
Acquisitions and adjustments	(300,000)	[1]	5,200,000
Currency translation	(1,000,000)		(10,000,000)
Goodwill, gross, ending balance	366,800,000		368,100,000
Goodwill, Accumulated Impairment Loss	0	[2]
Goodwill, net	366,800,000
Security Technologies [Member]
Goodwill, gross, beginning balance	905,000,000		914,000,000
Acquisitions and adjustments	2,900,000	[1]	1,200,000
Currency translation	(1,500,000)		(10,200,000)
Goodwill, gross, ending balance	906,400,000		905,000,000
Goodwill, Accumulated Impairment Loss	(344,000,000)	[2]
Goodwill, net	$ 562,400,000

[1] During 2011 the Company corrected certain purchase accounting errors within the Climate Solutions ($7.9 million) and Residential Solutions ($7.4 million) 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.