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Fair Value Measurements (Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($)
$ in Millions
Jul. 01, 2017
Oct. 01, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Liability, Collateral, Right to Reclaim Cash, Offset $ 81 $ 8
Derivative, Collateral, Obligation to Return Cash 0 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 [1] 8  
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset [1]   (61)
Available-for-Sale Securities, Current 4 4
Available for Sale Securities, Noncurrent 93 93
Deferred Compensation Assets 272 254
Total Assets 423 400
Derivative Liability, Netting [1] (73) (69)
Total Liabilities 11 0
Fair Value, Measurements, Recurring [Member] | Designated as Hedging Instrument [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 3 45
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset 0 (27)
Derivative Financial Instruments, Liabilities 0 0
Derivative Liability, Netting (32) (1)
Fair Value, Measurements, Recurring [Member] | Not Designated as Hedging Instrument [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 51 4
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash 8  
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset   (34)
Derivative Financial Instruments, Liabilities 11 0
Derivative Liability, Netting (41) (68)
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 0 0
Deferred Compensation Assets 8 18
Total Assets 8 18
Total Liabilities 0 0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Designated as Hedging Instrument [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 0 0
Derivative Financial Instruments, Liabilities 0 0
Fair Value, Measurements, Recurring [Member] | Level 1 [Member] | Not Designated as Hedging Instrument [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 0 0
Derivative Financial Instruments, 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 3 2
Available for Sale Securities, Noncurrent 42 38
Deferred Compensation Assets 264 236
Total Assets 355 386
Total Liabilities 84 69
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Designated as Hedging Instrument [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 3 72
Derivative Financial Instruments, Liabilities 32 1
Fair Value, Measurements, Recurring [Member] | Level 2 [Member] | Not Designated as Hedging Instrument [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 43 38
Derivative Financial Instruments, Liabilities 52 68
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 1 2
Available for Sale Securities, Noncurrent 51 55
Deferred Compensation Assets 0 0
Total Assets 52 57
Total Liabilities 0 0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Designated as Hedging Instrument [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 0 0
Derivative Financial Instruments, Liabilities 0 0
Fair Value, Measurements, Recurring [Member] | Level 3 [Member] | Not Designated as Hedging Instrument [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 0 0
Derivative Financial Instruments, Liabilities $ 0 $ 0
[1] Our derivative assets and liabilities are presented in our Consolidated Condensed Balance Sheets on a net basis when a legally enforceable master netting arrangement exists between the counterparty to a derivative contract and us. Additionally, at July 1, 2017, and October 1, 2016, we had $81 million and $8 million, respectively, of cash collateral posted with various counterparties where master netting arrangements exist and held no cash collateral.