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Fair Value Measurements (Schedule Of Available For Sale Securities) (Details) - USD ($)
$ in Millions
 9 Months Ended
Jul. 01, 2023
Oct. 01, 2022
Maximum [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Available For Sale Securities Debt Maturity Period 46 years  
Short Term Investment Maturity Period 12 months  
Other Current Assets [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-Sale, Current $ 7 $ 1
Other Current Assets [Member] | Level 1 | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-Sale, Current 0 0
Other Current Assets [Member] | Level 2 | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-Sale, Current 7 1
Other Current Assets [Member] | Level 3 | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-Sale, Current 0 0
Other Assets [Member] | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-Sale, Noncurrent 97 100
Other Assets [Member] | Level 1 | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-Sale, Noncurrent 0 0
Other Assets [Member] | Level 2 | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-Sale, Noncurrent 66 65
Other Assets [Member] | Level 3 | Fair Value, Recurring [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-Sale, Noncurrent 31 35
U.S. treasury and agency    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain (Loss), before Tax (4) (5)
Debt Securities, Available-for-sale 73 66
Debt Securities, Available-for-sale, Amortized Cost 77 71
Corporate and asset-backed    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain (Loss), before Tax (1) (2)
Debt Securities, Available-for-sale 31 35
Debt Securities, Available-for-sale, Amortized Cost $ 32 $ 37