Adjustments Related to Fair Value Hedges Included in Net Interest Expense in Consolidated Statements of Income (Details) (Interest rate, Interest Expense, USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Mar. 28, 2015	Mar. 29, 2014
Interest rate | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on interest rate swaps	$ 34	$ 15	$ 44	$ (16)
Gain (loss) on hedged borrowings	$ (34)	$ (15)	$ (44)	$ 16