Derivative Instruments Carrying Amount and Cumulative Basis Adjustment for Fair Value Hedges (Details) - USD ($) $ in Millions		Jun. 27, 2020	Sep. 28, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge		$ 17,320	$ 10,683
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)	[1]	525	31
Current Portion of Borrowings
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge		1,132	1,121
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)		7	(3)
Borrowings
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Hedged Liability, Fair Value Hedge		16,188	9,562
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease)		$ 518	$ 34

[1] Includes $35 million and $37 million of gains on terminated interest rate swaps as of June 27, 2020 and September 28, 2019, respectively.