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Fair value of financial instruments - Schedule of Financial Instruments Measured at Fair Value on Recurring Basis (Details) $ in Thousands, $ in Millions	Mar. 27, 2026 USD ($)	Mar. 27, 2026 CAD ($)	Jun. 27, 2025 USD ($)	Jun. 27, 2025 CAD ($)
Assets
Cash equivalents	$ 129,730		$ 11,183
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]			Other current assets	Other current assets
Derivative assets – current portion			$ 2,961
Total	$ 718,404		$ 641,963
Liabilities
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued expenses	Accrued expenses	Accrued expenses	Accrued expenses
Derivative liabilities – current portion	$ (10,835)		$ (105)
Total	(10,835)		(105)
Certificates of deposit and time deposits
Assets
Debt securities, available-for-sale	76,250		145,752
Corporate debt securities
Assets
Debt securities, available-for-sale	212,238		189,973
U.S. agency and U.S. treasury securities
Assets
Debt securities, available-for-sale	300,186		292,094
Foreign currency forward contracts
Liabilities
Derivative liabilities, notional amount	253,000	$ 0.4	35,000
Derivative assets, notional amount			130,000	$ 0.5
Level 1
Assets
Cash equivalents	0		0
Derivative assets – current portion			0
Total	0		0
Liabilities
Derivative liabilities – current portion	0		0
Total	0		0
Level 1 \| Certificates of deposit and time deposits
Assets
Debt securities, available-for-sale	0		0
Level 1 \| Corporate debt securities
Assets
Debt securities, available-for-sale	0		0
Level 1 \| U.S. agency and U.S. treasury securities
Assets
Debt securities, available-for-sale	0		0
Level 2
Assets
Cash equivalents	129,730		11,183
Derivative assets – current portion			2,961
Total	718,404		641,963
Liabilities
Derivative liabilities – current portion	(10,835)		(105)
Total	(10,835)		(105)
Level 2 \| Certificates of deposit and time deposits
Assets
Debt securities, available-for-sale	76,250		145,752
Level 2 \| Corporate debt securities
Assets
Debt securities, available-for-sale	212,238		189,973
Level 2 \| U.S. agency and U.S. treasury securities
Assets
Debt securities, available-for-sale	300,186		292,094
Level 3
Assets
Cash equivalents	0		0
Derivative assets – current portion			0
Total	0		0
Liabilities
Derivative liabilities – current portion	0		0
Total	0		0
Level 3 \| Certificates of deposit and time deposits
Assets
Debt securities, available-for-sale	0		0
Level 3 \| Corporate debt securities
Assets
Debt securities, available-for-sale	0		0
Level 3 \| U.S. agency and U.S. treasury securities
Assets
Debt securities, available-for-sale	$ 0		$ 0