Pension and Other Postretirement Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	2	2	5	19
Expected return on plan assets	0	0	0	(15)
Amortization of Net actuarial loss	1	1	3	3
Amortization of prior service credit	1	1	1	1
Settlement (gain) loss	0	(6)	0	(112)
Net periodic cost (credit)	4	(2)	9	(104)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	0	1	0	1
Amortization of prior service credit	0	0	(1)	(1)
Net periodic cost (credit)	$ 0	$ 1	$ (1)	$ 0