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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. 25, 2022 USD ($) contract	Mar. 25, 2022 CAD ($) contract	Jun. 25, 2021 USD ($) contract	Jun. 25, 2021 CAD ($) contract
Foreign currency forward contracts
Liabilities
Derivative assets, notional amount	$ 32,000	$ 0.8	$ 2,000
Derivative liabilities, notional amount	103,000		128,000	$ 0.4
Fair value, measurements, recurring
Assets
Derivative assets – current portion	182		1
Total	282,378		314,769
Liabilities
Derivative liabilities – current portion	(2,834)		(5,654)
Derivative liabilities – non-current portion	(524)		(1,977)
Total	(3,358)		(7,631)
Fair value, measurements, recurring \| Interest rate swaps
Liabilities
Derivative liabilities, notional amount	$ 125,100		$ 125,100
Number of interest rate swap agreement \| contract	2	2	2	2
Fair value, measurements, recurring \| Cash equivalents
Assets
Marketable securities	$ 36,344		$ 80,305
Fair value, measurements, recurring \| Liquidity funds
Assets
Marketable securities	31,382		31,226
Fair value, measurements, recurring \| Corporate debt securities
Assets
Marketable securities	189,722		171,790
Fair value, measurements, recurring \| U.S. agency and U.S. treasury securities
Assets
Marketable securities	24,748		31,447
Level 1 \| Fair value, measurements, recurring
Assets
Derivative assets – current portion	0		0
Total	0		0
Liabilities
Derivative liabilities – current portion	0		0
Derivative liabilities – non-current portion	0		0
Total	0		0
Level 1 \| Fair value, measurements, recurring \| Cash equivalents
Assets
Marketable securities	0		0
Level 1 \| Fair value, measurements, recurring \| Liquidity funds
Assets
Marketable securities	0		0
Level 1 \| Fair value, measurements, recurring \| Corporate debt securities
Assets
Marketable securities	0		0
Level 1 \| Fair value, measurements, recurring \| U.S. agency and U.S. treasury securities
Assets
Marketable securities	0		0
Level 2 \| Fair value, measurements, recurring
Assets
Derivative assets – current portion	182		1
Total	282,378		314,769
Liabilities
Derivative liabilities – current portion	(2,834)		(5,654)
Derivative liabilities – non-current portion	(524)		(1,977)
Total	(3,358)		(7,631)
Level 2 \| Fair value, measurements, recurring \| Cash equivalents
Assets
Marketable securities	36,344		80,305
Level 2 \| Fair value, measurements, recurring \| Liquidity funds
Assets
Marketable securities	31,382		31,226
Level 2 \| Fair value, measurements, recurring \| Corporate debt securities
Assets
Marketable securities	189,722		171,790
Level 2 \| Fair value, measurements, recurring \| U.S. agency and U.S. treasury securities
Assets
Marketable securities	24,748		31,447
Level 3 \| Fair value, measurements, recurring
Assets
Derivative assets – current portion	0		0
Total	0		0
Liabilities
Derivative liabilities – current portion	0		0
Derivative liabilities – non-current portion	0		0
Total	0		0
Level 3 \| Fair value, measurements, recurring \| Cash equivalents
Assets
Marketable securities	0		0
Level 3 \| Fair value, measurements, recurring \| Liquidity funds
Assets
Marketable securities	0		0
Level 3 \| Fair value, measurements, recurring \| Corporate debt securities
Assets
Marketable securities	0		0
Level 3 \| Fair value, measurements, recurring \| U.S. agency and U.S. treasury securities
Assets
Marketable securities	$ 0		$ 0