Derivative Instruments - Additional Information (Detail) (USD $)	12 Months Ended		12 Months Ended												12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014 Interest Expense	Sep. 28, 2013 Interest Expense	Sep. 29, 2012 Interest Expense	Sep. 27, 2014 Interest Expense Interest rate	Sep. 28, 2013 Interest Expense Interest rate	Sep. 29, 2012 Interest Expense Interest rate	Sep. 27, 2014 Derivatives designated as hedges Cash Flow Hedging [Member] Foreign exchange	Sep. 28, 2013 Derivatives designated as hedges Cash Flow Hedging [Member] Foreign exchange	Sep. 27, 2014 Derivatives designated as hedges Fair Value Hedging [Member] Interest rate	Sep. 28, 2013 Derivatives designated as hedges Fair Value Hedging [Member] Interest rate	Jun. 28, 2014 Derivatives not designated as hedges Foreign exchange	Sep. 28, 2013 Derivatives not designated as hedges Foreign exchange	Sep. 27, 2014 Venezuelan bolívar fuerte	Sep. 28, 2013 Venezuelan bolívar fuerte	Sep. 29, 2012 Venezuelan bolívar fuerte
Derivative [Line Items]
Realized benefit from derivative instruments						$ 93,000,000	$ 80,000,000	$ 58,000,000
Hedging period for foreign currency transactions, maximum	4 years
Derivative, Notional Amount									5,000,000,000	4,300,000,000	6,800,000,000	5,600,000,000	4,300,000,000	4,300,000,000
Net gains (losses) on foreign currency denominated assets and liabilities			24,000,000	199,000,000	(9,000,000)										(143,000,000)	0	0
Net deferred gain recorded in AOCI for contracts that will be reclassified to earnings in the next twelve months	200,000,000
Aggregate fair value of derivative instruments with credit-risk-related contingent features in a net liability position by counterparty	$ 34,000,000	$ 124,000,000