Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 03, 2020	Sep. 28, 2019	Sep. 29, 2018	Sep. 29, 2019
Leases [Abstract]
Operating Leases, Rent Expense		$ 220	$ 200
Operating Lease, Payments	$ 211
Operating Lease, Cost	199
Operating Lease, Right-of-Use Asset	532			$ 549
Operating Lease, Liability, Current	161
Operating Lease, Liability, Noncurrent	368
Variable Lease, Cost	451
Short-term Lease, Cost	38
Lease, Cost	688
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 167
Operating Lease, Weighted Average Remaining Lease Term	5 years
Operating Lease, Weighted Average Discount Rate, Percent	3.00%
Lessee, Operating Lease, Liability, to be Paid, Year One	$ 173
Lessee, Operating Lease, Liability, to be Paid, Year Two	129
Lessee, Operating Lease, Liability, to be Paid, Year Three	88
Lessee, Operating Lease, Liability, to be Paid, Year Four	64
Lessee, Operating Lease, Liability, to be Paid, Year Five	45
Lessee, Operating Lease, Liability, to be Paid, after Year Five	63
Operating Lease, Liability	562
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	33
Operating Lease, Liability	$ 529
Operating Leases, Future Minimum Payments Due, Next Twelve Months		159
Operating Leases, Future Minimum Payments, Due in Two Years		113
Operating Leases, Future Minimum Payments, Due in Three Years		74
Operating Leases, Future Minimum Payments, Due in Four Years		49
Operating Leases, Future Minimum Payments, Due in Five Years		40
Operating Leases, Future Minimum Payments, Due Thereafter		54
Operating Leases, Future Minimum Payments Due		489
Other Commitment, to be Paid, Year One		253
Other Commitment, to be Paid, Year Two		131
Other Commitment, to be Paid, Year Three		86
Other Commitment, to be Paid, Year Four		58
Other Commitment, to be Paid, Year Five		49
Other Commitment, to be Paid, after Year Five		122
Other Commitment		$ 699