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Pension and Other Postretirement Benefit Plans (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 03, 2021
Mar. 28, 2020
Apr. 03, 2021
Mar. 28, 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 1 7 3 17
Expected return on plan assets 0 (6) 0 (15)
Amortization of Net actuarial loss 1 1 2 2
Settlement (gain) loss 0 (106) 0 (106)
Net periodic cost (credit) 2 (104) 5 (102)
Other Postretirement Benefits Plan [Member]        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Interest cost 0 0 0 0
Amortization of prior service credit (1) (1) (1) (1)
Net periodic cost (credit) $ (1) $ (1) $ (1) $ (1)