BUSINESS SEGMENTS - Segment Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jul. 01, 2016	Jun. 30, 2017	Jul. 01, 2016
Segment Reporting Information [Line Items]
Net sales	$ 2,001.4	$ 1,955.7	$ 3,897.2	$ 3,771.9
Operating income	82.7	56.7	151.7	117.0
Network and Security Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	1,029.4	1,044.7	2,014.3	1,993.8
Operating income	64.9	64.9	126.7	123.7
Electrical and Electronic Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	561.5	555.1	1,088.9	1,061.1
Operating income	29.6	23.9	57.5	46.4
Utility Power Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	410.5	355.9	794.0	717.0
Operating income	21.3	12.0	37.5	26.3
Corporate [Member]
Segment Reporting Information [Line Items]
Net sales	0.0	0.0	0.0	0.0
Operating income	(33.1)	(44.1)	(70.0)	(79.4)
Continuing Operations [Member]
Segment Reporting Information [Line Items]
Net sales	2,001.4	1,955.7	3,897.2	3,771.9
Operating income	$ 82.7	$ 56.7	$ 151.7	$ 117.0