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Description of Business and Summary of Significant Accounting Policies - Government Incentives and Grants (Details) - USD ($) $ in Millions	12 Months Ended
	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)

X

- Definition

Government grants income.

+ References

No definition available.

+ Details

Name:	mei_GovernmentGrantsIncome
Namespace Prefix:	mei_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Reduction of government grants cost of goods sold and selling and administrative expense.

+ References

No definition available.

+ Details

Name:	mei_ReductionOfGovernmentGrantsCostOfGoodsSoldAndSellingAndAdministrativeExpense
Namespace Prefix:	mei_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_AccountingPoliciesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

Name:	us-gaap_GrantsReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant