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ACQUISITIONS (Details) - USD ($) $ in Millions				3 Months Ended		6 Months Ended
	Sep. 12, 2018	Oct. 03, 2017	Jul. 27, 2017	Oct. 27, 2018	Oct. 28, 2017	Oct. 27, 2018	Oct. 28, 2017
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired						$ 421.6	$ 129.9
Net loss				$ 14.6	$ 24.2	38.3	$ 44.7
Grakon
Business Acquisition [Line Items]
Percentage acquired	100.00%
Payments to acquire businesses, net of cash acquired	$ 421.6
Revenues				24.2
Net loss				(0.2)
Acquisition-related costs incurred				10.9		11.5
Procoplast
Business Acquisition [Line Items]
Percentage acquired			100.00%
Payments to acquire businesses, net of cash acquired			$ 22.2
Acquisition-related costs incurred				0.2		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				4.0		5.5
Selling and administrative expenses | Grakon
Business Acquisition [Line Items]
Acquisition-related costs incurred				8.3		8.9
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				3.4		4.9
Cost of products sold | Grakon
Business Acquisition [Line Items]
Acquisition-related costs incurred				2.6		2.6
Cost of products sold | Procoplast
Business Acquisition [Line Items]
Acquisition-related costs incurred				0.2		0.2
Cost of products sold | Pacific Insight
Business Acquisition [Line Items]
Acquisition-related costs incurred				$ 0.6		$ 0.6

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