Derivative Instruments - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 01, 2016	Oct. 03, 2015	Sep. 27, 2014
Derivative [Line Items]
Hedging period for foreign currency transactions, maximum	4 years
Net deferred gain recorded in AOCI for contracts that will be reclassified to earnings in the next twelve months	$ 67
Net gains (losses) on foreign currency denominated assets and liabilities	0	$ 0	$ (143)
Aggregate fair value of derivative instruments with credit-risk-related contingent features in a net liability position by counterparty	86	7
Venezuelan bolívar fuerte
Derivative [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities			(143)
Interest Income/(Expense)
Derivative [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities	(2)	42	24
Other expense, net | Venezuelan bolívar fuerte
Derivative [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities			(143)
Interest rate | Interest Income/(Expense)
Derivative [Line Items]
Realized benefit from derivative instruments	94	97	$ 93
Derivatives designated as hedges | Interest rate | Fair Value Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount	8,300	6,400
Derivatives designated as hedges | Foreign exchange | Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative, Notional Amount	5,600	6,500
Derivatives not designated as hedges | Foreign exchange
Derivative [Line Items]
Derivative, Notional Amount	$ 3,300	$ 3,300