BUSINESS COMBINATION - Additional information (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Apr. 01, 2016	Apr. 03, 2015	Jan. 01, 2016
Business Acquisition [Line Items]
Total purchase price, net of cash acquired and working capital adjustment	$ 0.0	$ (2.3)
Net sales	1,816.2	1,385.1
Operating income	60.3	59.3
Electrical and Electronic Solutions [Member]
Business Acquisition [Line Items]
Net sales	506.0	440.8
Operating income	22.5	35.8
Utility Power Solutions [Member]
Business Acquisition [Line Items]
Net sales	361.1	16.3
Operating income	14.3	$ 2.0
Power Solutions [Member]
Business Acquisition [Line Items]
Total purchase price, net of cash acquired and working capital adjustment			$ 824.7
Cash and outstanding checks acquired			11.7
Net working capital adjustment			(3.8)
Goodwill			187.6
Goodwill expected to be tax deductible			79.2
Net sales	494.3
Operating income	$ 14.9
Power Solutions [Member] | Electrical and Electronic Solutions [Member]
Business Acquisition [Line Items]
Goodwill			31.6
Power Solutions [Member] | Utility Power Solutions [Member]
Business Acquisition [Line Items]
Goodwill			$ 156.0