BUSINESS SEGMENTS - Segment Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018
Segment Reporting Information [Line Items]
Net sales	$ 2,222.2	$ 2,179.0	$ 6,593.3	$ 6,281.1
Operating income (losses)	101.8	89.5	282.1	222.4
Network and Security Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	1,179.3	1,138.0	3,491.7	3,229.1
Operating income (losses)	84.8	75.0	242.0	194.6
Electrical and Electronic Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	580.1	597.4	1,753.1	1,771.4
Operating income (losses)	35.3	34.1	102.6	101.1
Utility Power Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	462.8	443.6	1,348.5	1,280.6
Operating income (losses)	23.7	19.9	65.3	54.2
Corporate [Member]
Segment Reporting Information [Line Items]
Net sales	0.0	0.0	0.0	0.0
Operating income (losses)	(42.0)	(39.5)	(127.8)	(127.5)
Continuing Operations [Member]
Segment Reporting Information [Line Items]
Net sales	2,222.2	2,179.0	6,593.3	6,281.1
Operating income (losses)	$ 101.8	$ 89.5	$ 282.1	$ 222.4