Segment Information (Tables)

3 Months Ended

Mar. 31, 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 March 31,
Electrical	$	618.1	$	587.5	$	61.2	$	52.8	9.9	%	9.0	%
Power	373.1		264.8		38.4		55.0		10.3	%	20.8	%
TOTAL	$	991.2	$	852.3	$	99.6	$	107.8	10.0	%	12.6	%