Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting Information [Line Items]
Net sales	$ 895.3	$ 835.9	$ 2,510.6	$ 2,377.3
Operating Income	142.8	151.6	391.3	381.4
Operating Income as a % of Net Sales	15.90%	18.10%	15.60%	16.00%
Electrical [Member]
Segment Reporting Information [Line Items]
Net sales	641.6	597.6	1,792.8	1,677.4
Operating Income	92.6	104.5	256.2	255.0
Operating Income as a % of Net Sales	14.40%	17.50%	14.30%	15.20%
Power [Member]
Segment Reporting Information [Line Items]
Net sales	253.7	238.3	717.8	699.9
Operating Income	$ 50.2	$ 47.1	$ 135.1	$ 126.4
Operating Income as a % of Net Sales	19.80%	19.80%	18.80%	18.10%