Derivative Instruments - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 27, 2015	Jun. 28, 2014	Mar. 29, 2014	Jun. 27, 2015	Jun. 28, 2014	Sep. 27, 2014
Derivative [Line Items]
Hedging Period for Foreign Currency Transactions, Maximum				4 years
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months				$ 340
Net gains (losses) on foreign currency denominated assets and liabilities					$ (143)
Aggregate fair value of derivative instruments with credit-risk-related contingent features in a net liability position by counterparty	$ 32			32		$ 34
Foreign exchange | Not Designated as Hedging Instrument
Derivative [Line Items]
Derivative, Notional Amount	3,200			3,200		4,300
Interest Expense
Derivative [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities	(4)	$ (10)		27	8
Interest Expense | Interest rate
Derivative [Line Items]
Derivative, Gain (Loss) on Derivative, Net	23	$ 23		72	67
Fair Value Hedging | Interest rate | Derivatives Designated as Hedges
Derivative [Line Items]
Derivative, Notional Amount	5,800			5,800		6,800
Cash Flow Hedging | Foreign exchange | Derivatives Designated as Hedges
Derivative [Line Items]
Derivative, Notional Amount	$ 6,300			$ 6,300		$ 5,000
Venezuelan Bolívar Fuerte | SICAD 2 [Member]
Derivative [Line Items]
Net gains (losses) on foreign currency denominated assets and liabilities			$ (143)		$ 143