Pension and retirement plans (Periodic Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 28, 2024	Sep. 30, 2023
Components of net periodic pension costs
Service cost within selling, general and administrative expenses	$ 2,870	$ 2,563
Interest cost	6,183	6,145
Expected return on plan assets	(10,438)	(9,985)
Amortization of prior service cost	1	1
Recognized net actuarial loss	1,285	56
Net periodic pension benefit	(99)	(1,220)
Other Income, net
Components of net periodic pension costs
Net periodic pension benefit	(2,969)	$ (3,783)
Plan
Components of net periodic pension costs
Contributions	4,000
Estimated future employer pension plan contributions	$ 4,000