Net Gains or Losses Recognized on Economic Exposures Associated With Foreign Currency Exchange Contracts (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 29, 2014	Mar. 30, 2013	Mar. 29, 2014	Mar. 30, 2013
Costs and Expenses
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities	$ (5)	$ (145)	$ 4	$ (107)
Net gains (losses) on foreign exchange risk management contracts not designated as hedges	(22)	142	(44)	94
Net gains (losses)	(27)	(3)	(40)	(13)
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities	6	71	18	153
Net gains (losses) on foreign exchange risk management contracts not designated as hedges	(11)	(67)	(21)	(151)
Net gains (losses)	$ (5)	$ 4	$ (3)	$ 2