Pension and retirement plans (Tables)

3 Months Ended

Sep. 29, 2018

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Components of net periodic pension costs

	First Quarters Ended
	September 29,		September 30,
	2018		2017
	(Thousands)
Service cost	$	3,734	$	3,868
Total net periodic pension cost within selling, general and administrative expenses		3,734		3,868
Interest cost		6,614		5,783
Expected return on plan assets		(13,301)		(13,757)
Amortization of prior service credits		(393)		(393)
Recognized net actuarial loss		2,535		3,746
Total net periodic pension benefit within other income (expense), net		(4,545)		(4,621)
Net periodic pension benefit	$	(811)	$	(753)