Pension and retirement plans (Periodic Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 01, 2023	Apr. 02, 2022	Apr. 01, 2023	Apr. 02, 2022
Components of net periodic pension costs
Service cost	$ 3,003	$ 3,752	$ 9,011	$ 11,255
Interest cost	6,682	3,947	20,047	11,841
Expected return on plan assets	(12,215)	(12,284)	(36,645)	(36,852)
Amortization of prior service cost	1	1	3	3
Recognized net actuarial loss	617	4,085	1,852	12,257
Net periodic pension benefit	(1,912)	(499)	(5,732)	(1,496)
Selling, General and Administrative Expenses
Components of net periodic pension costs
Net periodic pension benefit	3,003	3,752	9,011	11,255
Other Income (Expense), net
Components of net periodic pension costs
Net periodic pension benefit	(4,915)	$ (4,251)	(14,743)	$ (12,751)
Plan
Components of net periodic pension costs
Contributions			6,000
Estimated future employer pension plan contributions	$ 2,000		$ 2,000