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. 01, 2017	Apr. 02, 2016	Apr. 01, 2017	Apr. 02, 2016
Costs and Expenses
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities	$ 110	$ 135	$ (123)	$ 46
Net gains (losses) on foreign exchange risk management contracts not designated as hedges	(103)	(163)	118	(84)
Net gains (losses)	7	(28)	(5)	(38)
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities	(3)	(15)	4	(5)
Net gains (losses) on foreign exchange risk management contracts not designated as hedges	3	16	(4)	4
Net gains (losses)	0	1	0	(1)
Income Taxes
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities	(11)	4	12	27
Net gains (losses) on foreign exchange risk management contracts not designated as hedges	14	0	(17)	0
Net gains (losses)	$ 3	$ 4	$ (5)	$ 27