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Fair value of financial instruments - Narrative (Details) $ in Millions, $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 27, 2026 USD ($) contract	Mar. 28, 2025 USD ($)	Mar. 27, 2026 USD ($) contract	Mar. 28, 2025 USD ($)	Jun. 27, 2025 USD ($) contract	Mar. 27, 2026 CAD ($) contract	Jun. 27, 2025 CAD ($) contract
Foreign Currency Fair Value Hedge Derivative [Line Items]
Unrealized gain (loss) on derivatives	$ (4.2)	$ 1.6	$ (4.3)	$ 0.6
Foreign currency forward contracts
Foreign Currency Fair Value Hedge Derivative [Line Items]
Derivative liabilities, notional amount	$ 253.0		253.0		$ 35.0	$ 0.4
Gain/(loss) from accumulated other comprehensive income expected to be reclassified			$ (8.9)		$ 1.5
Foreign currency forward contracts \| Designated as hedging instrument \| Thailand, baht
Foreign Currency Fair Value Hedge Derivative [Line Items]
Number of forward contracts outstanding \| contract	253		253		165	253	165
Derivative, notional amount	$ 253.0		$ 253.0		$ 165.0
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						$ 0.4	$ 0.5