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Description of Business and Summary of Significant Accounting Policies - Government Incentives and Grants (Details) - USD ($) $ in Millions | 12 Months Ended
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May 03, 2025 | Apr. 27, 2024 | Apr. 29, 2023
Accounting Policies [Abstract] |  |  |
Grants receivable | $ 13.6 | $ 12.3 |
Government Grants Income | 2.2 | 0.5 | $ 9.7
Reduction of government grants cost of goods sold and selling and administrative expense | $ (0.1) | $ (0.3) | $ (0.6)

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- Definition Government grants income. + References No definition available. + Details
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Namespace Prefix: | mei_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Reduction of government grants cost of goods sold and selling and administrative expense. + References No definition available. + Details
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Namespace Prefix: | mei_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of amounts due under the terms of governmental, corporate, or foundation grants. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)(a)(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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Balance Type: | debit
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