Severance liabilities - Schedule of Principal Weighted Average Actuarial Assumptions Used to Determine Severance Liabilities (Details)	Jun. 26, 2026	Jun. 27, 2025	Jun. 28, 2024
Minimum
Discount rate	3.10%	2.90%	3.90%
Future salary increases	3.50%	3.50%	3.50%
Maximum
Discount rate	4.00%	4.10%	5.50%
Future salary increases	10.00%	10.00%	10.00%

Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (j)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-5

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (k)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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Balance Type:	na
Period Type:	instant