Restructuring Activities (Schedule of Restructuring Charges Recorded) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			12 Months Ended
	Mar. 31, 2012	Mar. 31, 2011		Dec. 31, 2011
Restructuring charges	$ 18.7	$ 0.3
Cost of goods sold	8.4	(1.1)
Selling and administrative expenses	10.3	1.4
Climate Solutions [Member]
Restructuring charges	7.5	0.3
Residential Solutions [Member]
Restructuring charges	0.5	0.2
Industrial Technologies [Member]
Restructuring charges	5.8	(1.1)	[1]
Restructuring Reserve, Accrual Adjustment				6.7
Security Technologies [Member]
Restructuring charges	3.8	0.8
Corporate and Other [Member]
Restructuring charges	$ 1.1	$ 0.1

[1] Amount includes the reversal of $6.7 million of previously accrued restructuring charges.