Borrowings Commercial Paper Activity (Details) - USD ($) $ in Millions		12 Months Ended
		Oct. 02, 2021	Oct. 03, 2020
Commercial Paper Rollforward [Line Items]
Beginning Balance		$ 2,023	$ 5,342
Additions		2,221	11,500
Payments		(2,247)	(14,854)
Other Activity		(5)	35
Ending Balance		1,992	2,023
Commercial Paper with original maturities less that three months
Commercial Paper Rollforward [Line Items]
Beginning Balance		0	1,934
Additions	[1]	0	0
Payments	[1]	0	(1,961)
Other Activity		0	27
Ending Balance		0	0
Commercial paper with original maturities greater than three months
Commercial Paper Rollforward [Line Items]
Beginning Balance		2,023	3,408
Additions		2,221	11,500
Payments		(2,247)	(12,893)
Other Activity		(5)	8
Ending Balance		$ 1,992	$ 2,023

[1] Borrowings and reductions of borrowings are reported net.