Business Segments (Tables)

6 Months Ended

Jun. 28, 2014

Segment Reporting [Abstract]

Schedule of Reportable Segments

The Company has two reportable segments: Mechanical and Electrical. Segment detail was (in millions):

	Electrical		Mechanical		Eliminations			Total
As of and for Three Months Ended June 28, 2014
External sales	$	780.9	$	69.5	$	—		$	850.4
Intersegment sales	0.9		1.4		(2.3		)	—
Total sales	781.8		70.9		(2.3		)	850.4
Gross profit	193.3		17.7		—			211.0
Operating expenses	112.8		9.5		—			122.3
Goodwill impairment	1.0		—		—			1.0
Income from operations	79.5		8.2		—			87.7
Identifiable assets	3,596.4		203.0		—			3,799.4
Depreciation and amortization	32.0		3.2		—			35.2
Capital expenditures	19.3		1.3		—			20.6
As of and for Three Months Ended June 29, 2013
External sales	$	753.3	$	68.7	$	—		$	822.0
Intersegment sales	1.1		1.7		(2.8		)	—
Total sales	754.4		70.4		(2.8		)	822.0
Gross profit	191.5		17.7		—			209.2
Operating expenses	118.8		9.3		—			128.1
Income from operations	72.7		8.4		—			81.1
Identifiable assets	3,441.3		226.8		—			3,668.1
Depreciation and amortization	28.7		3.1		—			31.8
Capital expenditures	24.4		2.2		—			26.6