Derivative Instruments - Net Gains or Losses Recognized in Costs and Expenses on Economic Exposures Associated with Foreign Currency Exchange Rates (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 02, 2021	Oct. 03, 2020	Sep. 28, 2019
Costs and Expenses
Derivative [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities	$ (30)	$ 10	$ (188)
Net gains (losses) on foreign exchange risk management contracts not designated as hedges	(83)	(56)	123
Net gains (losses)	(113)	(46)	(65)
Interest expense, net
Derivative [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities	(47)	1	16
Net gains (losses) on foreign exchange risk management contracts not designated as hedges	47	0	(19)
Net gains (losses)	0	1	(3)
Income Taxes
Derivative [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities	(7)	(35)	50
Net gains (losses) on foreign exchange risk management contracts not designated as hedges	2	33	(51)
Net gains (losses)	$ (5)	$ (2)	$ (1)