Supplementary Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jan. 30, 2021	Jan. 25, 2020	Jan. 30, 2021	Jan. 25, 2020
Other Nonrecurring Expense	$ 27,630	$ 0	$ 27,630	$ 433
us-gaap_OtherNonrecurringExpensenetoftax	20,506
Restructuring and other charges	1,669	205	10,727	3,240
Property, Plant and Equipment
Other Nonrecurring Expense	5,085			300
Property Subject to Operating Lease
Other Nonrecurring Expense	13,328			0
Other Intangible Assets
Other Nonrecurring Expense	6,278			0
Other Noncurrent Assets
Other Nonrecurring Expense	2,939			0
Employee Severance [Member]
Restructuring and other charges	1,285	0	5,756	791
Other Restructuring [Member]
Restructuring and other charges	172	$ 205	4,644	$ 2,249
Facility Closing [Member]
Restructuring and other charges	212		327
Employee Severance [Member]
Accrued Salaries	$ 4,660		$ 4,660