Income taxes (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Dec. 30, 2022 |
Dec. 24, 2021 |
Dec. 30, 2022 |
Dec. 24, 2021 |
Jun. 24, 2022 |
|
| Income Tax Disclosure [Abstract] | |||||
| Liability for uncertain tax positions including accrued interest and penalties | $ 0.8 | $ 0.8 | $ 1.6 | ||
| Corporate effective income tax rate | 1.70% | 2.40% | 1.40% | 1.90% | |