Segment Information (Tables)

9 Months Ended

Sep. 30, 2017

Segment Reporting [Abstract]

Summary of segment information

The following table sets forth financial information by business segment (in millions):

	Net Sales				Operating Income				Operating Income as a % of Net Sales
	2017		2016		2017		2016		2017		2016
Three Months Ended September 30,
Electrical	$	654.0	$	634.6	$	85.6	$	80.9	13.1	%	12.7	%
Power	296.5		272.8		60.8		55.1		20.5	%	20.2	%
TOTAL	$	950.5	$	907.4	$	146.4	$	136.0	15.4	%	15.0	%
Nine Months Ended September 30,
Electrical	$	1,897.9	$	1,858.7	$	206.6	$	213.5	10.9	%	11.5	%
Power	853.2		792.3		174.5		156.5		20.5	%	19.8	%
TOTAL	$	2,751.1	$	2,651.0	$	381.1	$	370.0	13.9	%	14.0	%