Income taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 29, 2024	Mar. 31, 2023	Mar. 29, 2024	Mar. 31, 2023	Jun. 30, 2023
Income Tax Disclosure [Abstract]
Liability for uncertain tax positions including accrued interest and penalties	$ 1.2		$ 1.2		$ 1.5
Corporate effective income tax rate	2.90%	6.50%	5.00%	3.10%
Deferred tax assets, valuation allowance	$ 2.1		$ 2.1
Deferred tax assets, valuation allowance reversal				$ 1.6