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Fair Value Measurements (Schedule Of Available For Sale Securities) (Details) - USD ($)
$ in Millions
Oct. 02, 2021
Oct. 03, 2020
U.S. Treasury and Agency [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-sale $ 61 $ 55
Debt Securities, Available-for-sale, Amortized Cost 61 55
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain (Loss), before Tax 0 0
Corporate And Asset-Backed [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Securities, Available-for-sale 48 53
Debt Securities, Available-for-sale, Amortized Cost 47 51
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain (Loss), before Tax $ 1 $ 2