Derivative Instruments Carrying Amount and Cumulative Basis Adjustment for Fair Value Hedges (Details) - USD ($) $ in Millions		Jun. 29, 2019	Sep. 29, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge		$ 7,247	$ 8,010
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	[1]	32	(304)
Current Portion of Borrowings
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge		1,246	1,585
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)		(3)	(14)
Borrowings
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge		6,001	6,425
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)		$ 35	$ (290)

[1] Includes $38 million and $41 million of gains on terminated interest rate swaps as of June 29, 2019 and September 29, 2018, respectively.