Pension and retirement plans (Periodic Pension Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jun. 27, 2020	Jul. 01, 2023
Components of net periodic pension costs
Service cost	$ 15,007	$ 15,751	$ 15,145
Interest cost	15,787	15,904	22,552
Expected return on plan assets	(49,135)	(49,681)	(50,671)
Amortization of prior service cost	4	301	2,137
Recognized net actuarial loss	16,343	20,604	14,629
Net periodic pension (benefit) cost	(1,994)	2,879	3,792
Contributions	14,000	16,000
Selling, General and Administrative Expenses
Components of net periodic pension costs
Net periodic pension (benefit) cost	15,007	15,751	15,145
Other Income, net
Components of net periodic pension costs
Net periodic pension (benefit) cost	$ (17,001)	$ (12,872)	$ (11,353)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)	Other Nonoperating Income (Expense)
Forecast
Components of net periodic pension costs
Estimated future employer pension plan contributions				$ 8,000