Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies Operating Leases (Details)

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Commitments and Contingencies Operating Leases (Details) - USD ($)
$ in Millions
3 Months Ended
Dec. 29, 2019
Dec. 30, 2018
Sep. 30, 2019
Sep. 29, 2019
Leases, Operating [Abstract]        
Description of lessee leasing arrangements, operating leases We lease certain of our land, facilities and equipment under operating leases, with terms ranging from less than one year to 20 years, some of which include options to extend for up to 20 years.      
Operating Lease, Right-of-Use Asset $ 479   $ 449  
Operating Lease, Liability, Current 136   127  
Operating Lease, Liability, Noncurrent 393   373  
Operating Lease, Expense 44      
Operating Leases, Rent Expense   $ 37    
Operating Lease, Payments $ 38      
Operating Lease, Weighted Average Remaining Lease Term 5 years 8 months 12 days      
Operating Lease, Weighted Average Discount Rate, Percent 4.00%      
Operating Leases, Future Payments Due, Fiscal Year Maturity [Abstract]        
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year $ 115      
Lessee, Operating Lease, Liability, Payments, Due Year Two 140      
Lessee, Operating Lease, Liability, Payments, Due Year Three 107      
Lessee, Operating Lease, Liability, Payments, Due Year Four 62      
Lessee, Operating Lease, Liability, Payments, Due Year Five 43      
Lessee, Operating Lease, Liability, Payments, Due after Year Five 140      
Total future lease payments 607      
Imputed interest (78)      
Operating Lease, Liability $ 529   $ 500  
Remainder due in fiscal year - operating leases       $ 138
Due in two years - operating leases       97
Due in three years - operating leases       66
Due in four years - operating leases       31
Due in five years - operating leases       18
Thereafter - operating leases       35
Operating Leases, Future Minimum Payments Due       $ 385