XML 37 R26.htm IDEA: XBRL DOCUMENT v3.10.0.1
REVENUE (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Oct. 27, 2018
Oct. 28, 2017
Oct. 27, 2018
Oct. 28, 2017
Apr. 29, 2018
Apr. 28, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]            
Pre-production Costs $ 28.7   $ 28.7     $ 20.5
Cost of Products Sold 193.2 $ 168.1 $ 356.5 $ 313.7    
Payment terms, min     30 days      
Payment terms, max     45 days      
Contract asset 0.9   $ 0.9   $ 0.8  
Contract asset, reclassified to receivable     (0.8)      
Contract asset, impairment     0.0      
Contract liabilities 0.2   0.2   0.2  
Contract liabilities, revenue recognized     0.0      
Difference between revenue guidance in effect before and after topic 606 | Accounting Standards Update 2016-09            
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]            
Cost of Products Sold (8.8)   (16.0)      
Contract asset 0.9   0.9      
Contract liabilities 0.2   0.2      
Tooling reimbursements | Difference between revenue guidance in effect before and after topic 606 | Accounting Standards Update 2016-09            
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]            
Cost of Products Sold $ 8.8   $ 16.1      
Retained Earnings | Accounting Standards Update 2016-09            
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]            
Increase to retained earnings         $ 0.1