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ACQUISITIONS (Details) - USD ($) $ in Millions				3 Months Ended						4 Months Ended	9 Months Ended
	Sep. 12, 2018	Oct. 03, 2017	Jul. 27, 2017	Jan. 26, 2019	Oct. 27, 2018	Jul. 28, 2018	Jan. 27, 2018	Oct. 28, 2017	Jul. 29, 2017	Jan. 26, 2019	Jan. 26, 2019	Jan. 27, 2018
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired											$ 421.6	$ 129.9
Goodwill, increase (decrease)										$ 2.9
Net Income (Loss)				$ 30.7	$ 14.6	$ 23.7	$ (24.3)	$ 24.2	$ 20.5		69.0	$ 20.4
Grakon
Business Acquisition [Line Items]
Percentage acquired	100.00%
Payments to acquire businesses, net of cash acquired	$ 421.6
Revenues				46.9							71.1
Net Income (Loss)				4.4							4.2
Acquisition-related costs incurred				3.8							15.3
Procoplast
Business Acquisition [Line Items]
Percentage acquired			100.00%
Payments to acquire businesses, net of cash acquired			$ 22.2
Acquisition-related costs incurred				0.0							1.3
Pacific Insight
Business Acquisition [Line Items]
Percentage acquired		100.00%
Payments to acquire businesses, net of cash acquired		$ 108.7
Acquisition-related costs incurred				0.0							5.5
Selling and administrative expenses | Grakon
Business Acquisition [Line Items]
Acquisition-related costs incurred				0.8							9.7
Selling and administrative expenses | Procoplast
Business Acquisition [Line Items]
Acquisition-related costs incurred											1.1
Selling and administrative expenses | Pacific Insight
Business Acquisition [Line Items]
Acquisition-related costs incurred											4.9
Cost of products sold | Grakon
Business Acquisition [Line Items]
Acquisition-related costs incurred				$ 3.0							5.6
Cost of products sold | Procoplast
Business Acquisition [Line Items]
Acquisition-related costs incurred											0.2
Cost of products sold | Pacific Insight
Business Acquisition [Line Items]
Acquisition-related costs incurred											$ 0.6

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