Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Segment Reporting Information [Line Items]
Net sales	$ 855.8	$ 801.3	$ 1,615.3	$ 1,541.4
Operating Income	143.7	132.1	248.5	229.8
Operating Income as a % of Net Sales	16.80%	16.50%	15.40%	14.90%
Electrical [Member]
Segment Reporting Information [Line Items]
Net sales	612.4	564.5	1,151.2	1,079.8
Operating Income	95.5	88.9	163.6	150.5
Operating Income as a % of Net Sales	15.60%	15.70%	14.20%	13.90%
Power [Member]
Segment Reporting Information [Line Items]
Net sales	243.4	236.8	464.1	461.6
Operating Income	$ 48.2	$ 43.2	$ 84.9	$ 79.3
Operating Income as a % of Net Sales	19.80%	18.20%	18.30%	17.20%