Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]
Net Sales	$ 740.1	$ 723.8
Operating Income	97.7	101.7
Operating Income as a % of Net Sales	13.20%	14.10%
Electrical [Member]
Segment Reporting Information [Line Items]
Net Sales	515.3	505.1
Operating Income	61.6	63.8
Operating Income as a % of Net Sales	12.00%	12.60%
Power [Member]
Segment Reporting Information [Line Items]
Net Sales	224.8	218.7
Operating Income	$ 36.1	$ 37.9
Operating Income as a % of Net Sales	16.10%	17.30%