Pension and retirement plans (Periodic Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 02, 2022	Apr. 03, 2021	Apr. 02, 2022	Apr. 03, 2021
Components of net periodic pension costs
Service cost	$ 3,752	$ 3,938	$ 11,255	$ 11,813
Interest cost	3,947	3,976	11,841	11,928
Expected return on plan assets	(12,284)	(12,421)	(36,852)	(37,261)
Amortization of prior service cost	1	75	3	226
Recognized net actuarial loss	4,085	5,151	12,257	15,453
Net periodic pension (benefit) cost	(499)	719	(1,496)	2,159
Selling, General and Administrative Expenses
Components of net periodic pension costs
Net periodic pension (benefit) cost	3,752	3,938	11,255	11,813
Other Income, net
Components of net periodic pension costs
Net periodic pension (benefit) cost	(4,251)	$ (3,219)	(12,751)	$ (9,654)
Plan
Components of net periodic pension costs
Contributions			12,000
Estimated future employer pension plan contributions	$ 2,000		$ 2,000