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Fair Value Measurements (Schedule Of Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($)
$ in Millions
Mar. 30, 2019
Sep. 29, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Liability, Collateral, Right to Reclaim Cash, Offset $ 74 $ 18
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, Netting [1] 5 (20)
Total assets 470 440
Derivative Liability, Netting [1] (69) (38)
Total liabilities 14 5
Fair Value, Measurements, Recurring [Member] | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets 7 21
Total liabilities 0 0
Fair Value, Measurements, Recurring [Member] | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets 408 388
Total liabilities 83 43
Fair Value, Measurements, Recurring [Member] | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Total assets 50 51
Total liabilities 0 0
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-Sale Securities, Current 2 1
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Designated as hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 11 1
Derivative Asset, Netting 1 (1)
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Undesignated    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 48 25
Derivative Asset, Netting 4 (19)
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-Sale Securities, Current 0 0
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 | Designated as hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 0 0
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 | Undesignated    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 0 0
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-Sale Securities, Current 1 1
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 | Designated as hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 10 2
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 | Undesignated    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 44 44
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available-for-Sale Securities, Current 1 0
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 | Designated as hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 0 0
Other Current Assets [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 | Undesignated    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Assets 0 0
Other Assets [Member] | Fair Value, Measurements, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for Sale Securities, Noncurrent 99 97
Deferred compensation assets 310 316
Other Assets [Member] | Fair Value, Measurements, Recurring [Member] | Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for Sale Securities, Noncurrent 0 0
Deferred compensation assets 7 21
Other Assets [Member] | Fair Value, Measurements, Recurring [Member] | Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for Sale Securities, Noncurrent 50 46
Deferred compensation assets 303 295
Other Assets [Member] | Fair Value, Measurements, Recurring [Member] | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available for Sale Securities, Noncurrent 49 51
Deferred compensation assets 0 0
Other Current Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Designated as hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Liabilities 2 0
Derivative Liability, Netting (24) (8)
Other Current Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Undesignated    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Liabilities 12 5
Derivative Liability, Netting (45) (30)
Other Current Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 | Designated as hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Liabilities 0 0
Other Current Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Level 1 | Undesignated    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Liabilities 0 0
Other Current Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 | Designated as hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Liabilities 26 8
Other Current Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Level 2 | Undesignated    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Liabilities 57 35
Other Current Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 | Designated as hedges    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Derivative Financial Instruments, Liabilities 0 0
Other Current Liabilities [Member] | Fair Value, Measurements, Recurring [Member] | Level 3 | Undesignated    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
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 March 30, 2019, and September 29, 2018, we had $74 million and $18 million, respectively, of cash collateral posted with various counterparties where master netting arrangements exist and held no cash collateral