Borrowings Commercial Paper Activity (Details) - USD ($) $ in Millions		12 Months Ended
		Oct. 01, 2016	Oct. 03, 2015
Commercial Paper Rollforward [Line Items]
Beginning Balance		$ 2,430	$ 50
Additions		4,794	5,296
Payments		(5,714)	(2,920)
Other Activity		11	4
Ending Balance		1,521	2,430
Commercial Paper with original maturities less that three months [Member]
Commercial Paper Rollforward [Line Items]
Beginning Balance		2,330	50
Additions	[1]	0	2,277
Payments	[1]	(1,559)	0
Other Activity		6	3
Ending Balance		777	2,330
commercial paper with original maturities greater than three months [Member]
Commercial Paper Rollforward [Line Items]
Beginning Balance		100	0
Additions		4,794	3,019
Payments		(4,155)	(2,920)
Other Activity		5	1
Ending Balance		$ 744	$ 100

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