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Employee 401(k) Savings and Deferred Compensation Plans - Narrative (Details) - USD ($) | 12 Months Ended
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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

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- Definition Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 4 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=118951113&loc=d3e6812-107765 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.17) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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