Derivative Financial Instruments (Fair Value Of All Derivative Instruments) (Details) - USD ($) $ in Millions	Jun. 27, 2015	Sep. 27, 2014
Derivative [Line Items]
Derivative Assets	$ 43	$ 59
Derivative Liabilities	19	160
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Assets	16	17
Derivative Liabilities	4	78
Designated as Hedging Instrument [Member] | Commodity Contracts [Member]
Derivative [Line Items]
Derivative Assets	16	17
Derivative Liabilities	4	78
Designated as Hedging Instrument [Member] | Foreign Currency [Member]
Derivative [Line Items]
Derivative Assets	0	0
Derivative Liabilities	0	0
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative Assets	27	42
Derivative Liabilities	15	82
Not Designated as Hedging Instrument [Member] | Commodity Contracts [Member]
Derivative [Line Items]
Derivative Assets	27	42
Derivative Liabilities	15	80
Not Designated as Hedging Instrument [Member] | Foreign Currency [Member]
Derivative [Line Items]
Derivative Assets	0	0
Derivative Liabilities	$ 0	$ 2