GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Oct. 27, 2018	Apr. 28, 2018
Finite-lived Intangible Assets [Roll Forward]
Gross	$ 321.7	$ 102.1
Accumulated Amortization	46.6	41.1
Net	275.1	61.0
Customer Relationships and Agreements
Finite-lived Intangible Assets [Roll Forward]
Gross	244.2	64.4
Accumulated Amortization	21.2	18.1
Net	$ 223.0	$ 46.3
Wtd. Avg. Remaining Amortization Periods (Years)	17 years 10 months 27 days	12 years 4 months
Trade Names, Patents and Technology Licenses
Finite-lived Intangible Assets [Roll Forward]
Gross	$ 77.5	$ 37.7
Accumulated Amortization	25.4	23.0
Net	$ 52.1	$ 14.7
Wtd. Avg. Remaining Amortization Periods (Years)	6 years 10 months 15 days	5 years 3 months 15 days