Pension and retirement plans (Periodic Pension Cost) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 29, 2025	Mar. 30, 2024	Mar. 29, 2025	Mar. 30, 2024
Components of net periodic pension costs
Service cost within selling, general and administrative expenses	$ 2,870	$ 2,563	$ 8,610	$ 7,689
Interest cost	6,183	6,145	18,549	18,434
Expected return on plan assets	(10,438)	(9,986)	(31,315)	(29,956)
Recognized net actuarial loss and other	1,286	57	3,859	170
Net periodic pension benefit	(99)	(1,221)	(297)	(3,663)
Other Income, net
Components of net periodic pension costs
Net periodic pension benefit	(2,969)	$ (3,784)	(8,907)	$ (11,352)
Plan
Components of net periodic pension costs
Contributions			6,000
Estimated future employer pension plan contributions	$ 2,000		$ 2,000