GOODWILL AND INTANGIBLE ASSETS - Schedule of Goodwill Roll-forward (Details) $ in Millions	3 Months Ended
	Jul. 28, 2018 USD ($)
Goodwill [Roll Forward]
Beginning balance	$ 59.2
Goodwill Acquired	0.0
Foreign Currency Translation	(0.4)
Ending balance	58.8
Automotive
Goodwill [Roll Forward]
Beginning balance	57.5
Goodwill Acquired	0.0
Foreign Currency Translation	(0.4)
Ending balance	57.1
Interface
Goodwill [Roll Forward]
Beginning balance	0.7
Goodwill Acquired	0.0
Foreign Currency Translation	0.0
Ending balance	0.7
Power Products
Goodwill [Roll Forward]
Beginning balance	1.0
Goodwill Acquired	0.0
Foreign Currency Translation	0.0
Ending balance	$ 1.0