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INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jan. 26, 2019	Apr. 28, 2018	Jan. 27, 2018	Jan. 26, 2019	Jan. 27, 2018
Income tax expense	$ (3.0)		$ 63.4	$ 4.5	$ 72.6
Document Period End Date				Jan. 26, 2019
Discrete Income Tax Benefits	$ 7.5			$ 7.5
Effective income tax rate	(10.40%)		162.10%	6.10%	78.10%
Total Impact of U.S. Tax Reform [Member]
Income tax expense	$ (4.8)	$ (3.1)	$ 56.8

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