Income Taxes (Details)	3 Months Ended		6 Months Ended
	Oct. 27, 2017	Oct. 28, 2016	Oct. 27, 2017	Oct. 28, 2016
Income Tax Disclosure [Abstract]
Effective income tax provision (benefit) rate, continuing operations	(38.20%)	(32.30%)	24.10%	34.50%