Fair value of financial instruments - Additional Information (Details) $ in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2023 USD ($) contract	Jun. 24, 2022 USD ($) contract	Jun. 30, 2023 CAD ($) contract	Jun. 24, 2022 CAD ($) contract	Sep. 27, 2019 contract	Sep. 03, 2019	Jul. 25, 2018
Foreign Currency Fair Value Hedge Derivative [Line Items]
Derivative fixed interest rate							2.86%
Foreign currency forward contracts
Foreign Currency Fair Value Hedge Derivative [Line Items]
Derivative liabilities, notional amount	$ 140.0	$ 135.0	$ 0.2	$ 0.5
Derivative, notional amount	143.0	$ 135.0
Gains or losses from accumulated other comprehensive income expected to be reclassified	$ (4.0)
Foreign currency forward contracts | Designated as hedging instrument | United States of America, Dollars
Foreign Currency Fair Value Hedge Derivative [Line Items]
Number of foreign currency derivatives held | contract	143	135	143	135
Foreign currency forward contracts | Designated as hedging instrument | Canada, Dollars
Foreign Currency Fair Value Hedge Derivative [Line Items]
Number of foreign currency derivatives held | contract	1	1	1	1
Foreign currency forward contracts | Not designated as hedging instrument
Foreign Currency Fair Value Hedge Derivative [Line Items]
Unrealized gain (loss) on derivatives	$ 0.4	$ (0.8)
Interest rate swaps
Foreign Currency Fair Value Hedge Derivative [Line Items]
Derivative liabilities, notional amount		$ 125.1
Derivative, notional amount	60.9
Gains or losses from accumulated other comprehensive income expected to be reclassified	$ 0.4
Number of interest rate derivatives held | contract	1	2	1	2	2
Interest rate swaps | Bank of ayudhya public company | Bank of america credit facility
Foreign Currency Fair Value Hedge Derivative [Line Items]
Debt fixed interest percentage						4.36%