BUSINESS SEGMENTS - Segment Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Segment Reporting Information [Line Items]
Net sales	$ 2,262.6	$ 2,137.9	$ 4,371.1	$ 4,102.1
Operating income (losses)	(105.7)	(71.3)	(180.3)	(132.9)
Network and Security Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	1,199.9	1,096.3	2,312.4	2,091.1
Operating income (losses)	(86.3)	(66.1)	(157.2)	(119.6)
Electrical and Electronic Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	607.0	605.6	1,173.0	1,174.0
Operating income (losses)	(38.2)	(35.6)	(67.3)	(67.0)
Utility Power Solutions [Member]
Segment Reporting Information [Line Items]
Net sales	455.7	436.0	885.7	837.0
Operating income (losses)	(23.1)	(17.9)	(41.6)	(34.3)
Corporate [Member]
Segment Reporting Information [Line Items]
Net sales	0.0	0.0	0.0	0.0
Operating income (losses)	41.9	48.3	85.8	88.0
Continuing Operations [Member]
Segment Reporting Information [Line Items]
Net sales	2,262.6	2,137.9	4,371.1	4,102.1
Operating income (losses)	$ (105.7)	$ (71.3)	$ (180.3)	$ (132.9)