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Fair value of financial instruments - Narrative (Details) $ in Millions, $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 29, 2023 USD ($) contract	Dec. 30, 2022 USD ($)	Dec. 29, 2023 USD ($) contract	Dec. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) contract	Dec. 29, 2023 CAD ($) contract	Jun. 30, 2023 CAD ($) contract	Sep. 27, 2019 contract	Sep. 03, 2019	Jul. 25, 2018
Foreign Currency Fair Value Hedge Derivative [Line Items]
Fixed interest rate										2.86%
Foreign currency forward contracts
Foreign Currency Fair Value Hedge Derivative [Line Items]
Derivative liabilities, notional amount	$ 1.0		$ 1.0		$ 140.0
Derivative assets, notional amount	125.0		125.0		3.0
Gain/(loss) from accumulated other comprehensive income expected to be reclassified			3.9		$ (4.0)
Unrealized gain (loss) on derivatives	$ 2.6	$ 4.2	$ 2.9	$ 4.0
Foreign currency forward contracts \| Designated as hedging instrument \| Thailand, baht
Foreign Currency Fair Value Hedge Derivative [Line Items]
Number of forward contracts outstanding \| contract	126		126		143,000	126	143,000
Derivative, notional amount	$ 126.0		$ 126.0		$ 143.0
Foreign currency forward contracts \| Designated as hedging instrument \| Canada, dollars
Foreign Currency Fair Value Hedge Derivative [Line Items]
Number of forward contracts outstanding \| contract	1		1		1	1	1
Derivative liabilities, notional amount						$ 0.3
Derivative assets, notional amount						$ 0.3	$ 0.2
Interest rate swaps
Foreign Currency Fair Value Hedge Derivative [Line Items]
Number of forward contracts outstanding \| contract	1		1		1	1	1	2
Derivative, notional amount	$ 60.9		$ 60.9		$ 60.9
Gain/(loss) from accumulated other comprehensive income expected to be reclassified			$ 0.1		$ 0.4
Interest rate swaps \| Bank of Ayudhya Public Company \| Bank of America Credit Facility
Foreign Currency Fair Value Hedge Derivative [Line Items]
Debt instrument stated interest percentage									4.36%