Income taxes (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Dec. 29, 2023 |
Dec. 30, 2022 |
Jun. 30, 2023 |
|
| Income Tax Disclosure [Abstract] | |||
| Liability for uncertain tax positions including accrued interest and penalties | $ 2.5 | $ 1.5 | |
| Corporate effective income tax rate | 5.20% | 1.70% | |
| Deferred tax assets, valuation allowance | $ 1.6 | ||