Pension and Other Benefit Programs (Tables)

9 Months Ended

Jun. 27, 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				Nine Months Ended				Quarter Ended				Nine Months Ended
	Jun. 27, 2020		Jun. 29, 2019		Jun. 27, 2020		Jun. 29, 2019		Jun. 27, 2020		Jun. 29, 2019		Jun. 27, 2020		Jun. 29, 2019
Service costs	$	102	$	89	$	307	$	255	$	3	$	2	$	8	$	6
Other costs (benefits):
Interest costs	133		152		399		441		14		17		42		50
Expected return on plan assets	(273)		(250)		(819)		(729)		(14)		(14)		(43)		(42)
Amortization of previously deferred service costs	3		3		10		10		—		—		—		—
Recognized net actuarial loss	131		65		393		196		3		—		10		—
Total other costs (benefits)	(6)		(30)		(17)		(82)		3		3		9		8
Net periodic benefit cost	$	96	$	59	$	290	$	173	$	6	$	5	$	17	$	14