Acquisitions (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	6 Months Ended				1 Months Ended
	Jul. 02, 2011	Jul. 02, 2011	Jun. 30, 2012 Mexico Electrical Products Company [Member]	Jun. 30, 2012 Elco Group B.V. [Member]	Feb. 03, 2012 Milwaukee Gear Company [Member]	Aug. 22, 2011 Electrical Products Company Of A.O.Smith Corporation [Member]	Jun. 01, 2011 Australian Fan And Motor Company [Member]	Jun. 30, 2012 Ramu, Inc. [Member]	Apr. 05, 2011 Ramu, Inc. [Member]
Business Acquisition [Line Items]
Acquisition-related expenses	$ 3.5	$ 10.1
Cash included in purchase price			1.3		80.3	756.1
Business Acquisition, Purchase Price Allocation, Assets Acquired				1.4
Purchase price cash and non-cash consideration						140.9
Business acquisition consideration in shares						2,834,026
Acquisitions, purchase price							5.7		5.3
Business acquisition recorded liability								$ 13.7