REVENUE - Impact of Changes in Accounting Policies (Details) - USD ($) $ in Millions	3 Months Ended
	Jul. 28, 2018	Jul. 29, 2017	Apr. 29, 2018	Apr. 28, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cost of Products Sold	$ 163.3	$ 145.6
Inventory, Net	88.5			$ 84.1
Contract with Customer, Asset, Net	1.0		$ 0.8
Net Sales	(223.4)	$ (201.2)
Contract with Customer, Liability	0.2		$ 0.2
Retained Earnings	490.0			$ 472.0
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cost of Products Sold	(7.2)
Inventory, Net	(0.7)
Contract with Customer, Asset, Net	1.0
Net Sales	7.1
Contract with Customer, Liability	0.2
Retained Earnings	0.1
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cost of Products Sold	170.5
Inventory, Net	89.2
Contract with Customer, Asset, Net	0.0
Net Sales	(230.5)
Contract with Customer, Liability	0.0
Retained Earnings	489.9
Tooling Reimbursements [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cost of Products Sold	7.3
Net Sales	$ 7.3