Fair Value Measurements (Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Sep. 27, 2014	Sep. 28, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative assets and liabilities posted cash collateral	$ 98	$ 79
Derivative, Collateral, Obligation to Return Cash	0
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(50)	(22)
Available-for-sale Securities, Current	1	1
Available-for-sale Securities, Noncurrent	92	93
Deferred Compensation Assets	233	214
Total Assets	335	318
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	(148)	(101)
Total Liabilities	12	1
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Current	0	0
Available-for-sale Securities, Noncurrent	1	4
Deferred Compensation Assets	15	23
Total Assets	16	27
Total Liabilities	0	0
Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Current	1	1
Available-for-sale Securities, Noncurrent	24	24
Deferred Compensation Assets	218	191
Total Assets	302	248
Total Liabilities	160	102
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Current	0	0
Available-for-sale Securities, Noncurrent	67	65
Deferred Compensation Assets	0	0
Total Assets	67	65
Total Liabilities	0	0
Commodity [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity Derivatives, Assets	9	8
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(50)	(21)
Commodity Derivatives, Liabilities	10	0
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	(148)	(101)
Commodity [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity Derivatives, Assets	0	0
Commodity Derivatives, Liabilities	0	0
Commodity [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity Derivatives, Assets	59	29
Commodity Derivatives, Liabilities	158	101
Commodity [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Commodity Derivatives, Assets	0	0
Commodity Derivatives, Liabilities	0	0
Foreign Exchange Contract [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	2
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	0	(1)
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	0	0
Foreign Exchange Forward Contracts, Liabilities	2	1
Foreign Exchange Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Foreign Exchange Forward Contracts, Liabilities	0	0
Foreign Exchange Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	3
Foreign Exchange Forward Contracts, Liabilities	2	1
Foreign Exchange Contract [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign Currency Contract, Asset, Fair Value Disclosure	0	0
Foreign Exchange Forward Contracts, Liabilities	$ 0	$ 0