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Leases (Details) - USD ($)
$ in Millions
 12 Months Ended
Oct. 02, 2021
Oct. 03, 2020
Sep. 28, 2019
Leases [Abstract]      
Operating Lease, Payments $ 204 $ 211  
Operating Lease, Cost 183 199  
Operating Lease, Right-of-Use Asset 531 532  
Variable Lease, Cost 473 451  
Short-term Lease, Cost 33 38  
Lease, Cost 689 688  
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability $ 197 $ 167  
Operating Lease, Weighted Average Remaining Lease Term 5 years 5 years  
Operating Lease, Weighted Average Discount Rate, Percent 2.00% 3.00%  
Lessee, Operating Lease, Liability, to be Paid, Year One $ 162    
Lessee, Operating Lease, Liability, to be Paid, Year Two 121    
Lessee, Operating Lease, Liability, to be Paid, Year Three 93    
Lessee, Operating Lease, Liability, to be Paid, Year Four 69    
Lessee, Operating Lease, Liability, to be Paid, Year Five 47    
Lessee, Operating Lease, Liability, to be Paid, after Year Five 61    
Operating Lease, Liability 553    
Lessee, Operating Lease, Liability, Undiscounted Excess Amount 30    
Operating Lease, Liability 523    
Operating Lease, Liability, Current $ 155 $ 161  
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] Other Liabilities Other Liabilities  
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] Other current liabilities Other current liabilities  
Operating Lease, Liability, Noncurrent $ 368 $ 368  
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other Assets Other Assets  
Operating Lease, Expense     $ 220