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Pension and Other Postretirement Benefit Plans (Tables)
3 Months Ended
Jan. 02, 2021
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
The components of the net periodic cost for the pension and postretirement benefit plans for the three months ended January 2, 2021 and December 28, 2019 are as follows (in millions):
Pension Plans
Three Months Ended
January 2, 2021December 28, 2019
Service cost$— $— 
Interest cost10 
Expected return on plan assets— (9)
Amortization of net actuarial loss
Net periodic cost (credit)$$
Postretirement Benefit Plans
Three Months Ended
January 2, 2021December 28, 2019
Interest cost$— $— 
Amortization of prior service cost (credit)— — 
Net periodic cost (credit)$— $—