Net Gains or Losses Recognized on Economic Exposures Associated With Foreign Currency Exchange Contracts (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 01, 2022	Jan. 02, 2021
Costs and Expenses
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on foreign currency denominated assets and liabilities	$ (63)	$ 158
Net gain (loss) on foreign exchange risk management contracts not designated as hedges	33	(187)
Net gain (loss)	(30)	(29)
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on foreign currency denominated assets and liabilities	1	(41)
Net gain (loss) on foreign exchange risk management contracts not designated as hedges	0	43
Net gain (loss)	1	2
Income Taxes
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on foreign currency denominated assets and liabilities	8	(59)
Net gain (loss) on foreign exchange risk management contracts not designated as hedges	(8)	50
Net gain (loss)	$ 0	$ (9)