Pension and Other Benefit Programs (Tables)

6 Months Ended

Mar. 28, 2020

Retirement Benefits [Abstract]

Net Periodic Benefit Cost

The components of net periodic benefit cost are as follows: 

	Pension Plans								Postretirement Medical Plans
	Quarter Ended				Six Months Ended				Quarter Ended				Six Months Ended
	Mar. 28, 2020		Mar. 30, 2019		Mar. 28, 2020		Mar. 30, 2019		Mar. 28, 2020		Mar. 30, 2019		Mar. 28, 2020		Mar. 30, 2019
Service costs	$	102	$	83	$	205	$	166	$	2	$	2	$	5	$	4
Other costs (benefits):
Interest costs	133		144		266		289		14		17		28		33
Expected return on plan assets	(273)		(240)		(546)		(479)		(15)		(14)		(29)		(28)
Amortization of previously deferred service costs	4		4		7		7		—		—		—		—
Recognized net actuarial loss	131		67		262		131		4		—		7		—
Total other costs (benefits)	(5)		(25)		(11)		(52)		3		3		6		5
Net periodic benefit cost	$	97	$	58	$	194	$	114	$	5	$	5	$	11	$	9