Net Gains or Losses Recognized on Economic Exposures Associated With Foreign Currency Exchange Contracts (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 03, 2021	Mar. 28, 2020	Apr. 03, 2021	Mar. 28, 2020
Costs and Expenses
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on foreign currency denominated assets and liabilities	$ (97)	$ (241)	$ 61	$ (172)
Net gain (loss) on foreign exchange risk management contracts not designated as hedges	91	239	(96)	159
Net gain (loss)	(6)	(2)	(35)	(13)
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on foreign currency denominated assets and liabilities	(14)	64	(55)	52
Net gain (loss) on foreign exchange risk management contracts not designated as hedges	12	(62)	55	(52)
Net gain (loss)	(2)	2	0	0
Income Taxes
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) on foreign currency denominated assets and liabilities	25	8	(34)	(7)
Net gain (loss) on foreign exchange risk management contracts not designated as hedges	(20)	(20)	30	(3)
Net gain (loss)	$ 5	$ (12)	$ (4)	$ (10)