Derivative Instruments - Carrying Amount and Cumulative Basis Adjustment for Fair Value Hedges (Details) - USD ($) $ in Millions		Sep. 28, 2019	Sep. 29, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge	[1]	$ 10,683	$ 8,010
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	[1]	31	(304)
Current Portion of Borrowings
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge		1,121	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		9,562	6,425
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)		$ 34	$ (290)

[1] Includes $37 million and $41 million of gains on terminated interest rate swaps as of September 28, 2019 and September 29, 2018, respectively.