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Fair Value Measurements (Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $)
In Millions, unless otherwise specified
Sep. 28, 2013
Sep. 29, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative assets and liabilities posted cash collateral $ 79 $ 59
Fair Value, Measurements, Recurring [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreign Exchange Forward Contracts, Assets 2 0
Available-for-sale Securities, Current 1 3
Available-for-sale Securities, Noncurrent 93 117
Deferred Compensation Assets 214 180
Total Assets 318 313
Foreign Exchange Forward Contracts, Liabilities 1 3
Total Liabilities 1 5
Fair Value, Measurements, Recurring [Member] | Level 1 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreign Exchange Forward Contracts, Assets 0 0
Available-for-sale Securities, Current 0 0
Available-for-sale Securities, Noncurrent 4 6
Deferred Compensation Assets 23 31
Total Assets 27 37
Foreign Exchange Forward Contracts, Liabilities 0 0
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]    
Foreign Exchange Forward Contracts, Assets 3 1
Available-for-sale Securities, Current 1 3
Available-for-sale Securities, Noncurrent 24 25
Deferred Compensation Assets 191 149
Total Assets 248 231
Foreign Exchange Forward Contracts, Liabilities 1 3
Total Liabilities 102 105
Fair Value, Measurements, Recurring [Member] | Level 3 [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreign Exchange Forward Contracts, Assets 0 0
Available-for-sale Securities, Current 0 0
Available-for-sale Securities, Noncurrent 65 86
Deferred Compensation Assets 0 0
Total Assets 65 86
Foreign Exchange Forward Contracts, Liabilities 0 0
Total Liabilities 0 0
Fair Value, Measurements, Recurring [Member] | Netting [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Foreign Exchange Forward Contracts, Assets (1) (1)
Available-for-sale Securities, Current 0 0
Available-for-sale Securities, Noncurrent 0 0
Deferred Compensation Assets 0 0
Total Assets (22) (41)
Foreign Exchange Forward Contracts, Liabilities 0 0
Total Liabilities (101) (100)
Commodity [Member] | Fair Value, Measurements, Recurring [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Commodity Derivatives, Assets 8 13
Commodity Derivatives, Liabilities 0 2
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 29 53
Commodity Derivatives, Liabilities 101 102
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
Commodity [Member] | Fair Value, Measurements, Recurring [Member] | Netting [Member]
    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Commodity Derivatives, Assets (21) (40)
Commodity Derivatives, Liabilities $ (101) $ (100)