Pension and retirement plans (Periodic Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2023	Oct. 01, 2022
Components of net periodic pension costs
Service cost within selling, general and administrative expenses	$ 2,563	$ 3,004
Interest cost	6,145	6,682
Expected return on plan assets	(9,985)	(12,215)
Amortization of prior service cost	1	1
Recognized net actuarial loss	56	617
Net periodic pension cost (benefit)	(1,220)	(1,911)
Other Income, net
Components of net periodic pension costs
Net periodic pension cost (benefit)	(3,783)	$ (4,915)
Plan
Components of net periodic pension costs
Contributions	4,000
Estimated future employer pension plan contributions	$ 4,000