Segment Information (Tables)

9 Months Ended

Sep. 30, 2018

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
	2018		2017		2018		2017		2018		2017
Three Months Ended September 30,
Electrical	$	687.4	$	654.0	$	94.0	$	88.4	13.7	%	13.5	%
Power	492.3		296.5		69.8		61.7		14.2	%	20.8	%
TOTAL	$	1,179.7	$	950.5	$	163.8	$	150.1	13.9	%	15.8	%
Nine Months Ended September 30,
Electrical	$	1,994.1	$	1,897.9	$	246.5	$	215.2	12.4	%	11.3	%
Power	1,343.5		853.2		173.8		177.1		12.9	%	20.8	%
TOTAL	$	3,337.6	$	2,751.1	$	420.3	$	392.3	12.6	%	14.3	%