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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 |  |  |

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