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Fair Value Measurements (Schedule Of Debt Securities Measured At Fair Value On A Recurring Basis, Unobservable Input Reconciliation) (Details) - USD ($)
$ in Millions
3 Months Ended
Dec. 30, 2023
Dec. 31, 2022
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of year $ 30 $ 35
Total unrealized gains (losses) included in other comprehensive income (loss) 0 0
Purchases 1 2
Issuances 0 0
Settlements (1) (4)
Balance at end of period 30 33
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss) $ 0 $ 0