Net Gains or Losses Recognized on Economic Exposures Associated With Foreign Currency Exchange Contracts (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities				$ (143)
Costs and Expenses
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities	$ 52	$ (1)	$ (496)	3
Net gains (losses) on foreign exchange risk management contracts not designated as hedges	(41)	(13)	474	(57)
Net gains (losses)	11	(14)	(22)	(54)
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities	(4)	(10)	27	8
Net gains (losses) on foreign exchange risk management contracts not designated as hedges	4	10	(25)	(11)
Net gains (losses)	$ 0	$ 0	$ 2	$ (3)