Derivative Instruments - Adjustments Related to Fair Value Hedges included in Net Interest Expense in Consolidated Statements of Income (Detail) - Interest rate - Interest Income/(Expense) - USD ($) $ in Millions	12 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Sep. 27, 2014
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) on interest rate swaps	$ 18	$ 60	$ (38)
Gain (loss) on hedged borrowings	$ (18)	$ (60)	$ 38