Employee 401(k) Savings and Deferred Compensation Plans - Narrative (Details) - USD ($)	12 Months Ended
	May 02, 2020	Apr. 27, 2019	Apr. 28, 2018
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Employer matching contribution, percent	3.00%
Employer 401(k) contribution	$ 1,700,000	$ 1,500,000	$ 1,400,000
Deferred Compensation Plan, maximum deferral percentage, annual base salary	75.00%
Deferred Compensation Plan, maximum deferral percentage, annual cash incentive	100.00%
Deferred Compensation Plan, aggregate minimum deferral	$ 3,000
Deferred Compensation Plan, minimum deferral period	3 years
Deferred Compensation Plan, vesting percentage	100.00%
Deferred Compensation Plan, employer discretionary contribution amount	$ 0
Deferred compensation		5,400,000	6,100,000
Key Individual Life Insurance
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Cash surrender value of life insurance		9,000,000.0	8,600,000
Asset Held in Trust
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits [Line Items]
Cash surrender value of life insurance		$ 6,600,000	$ 6,900,000