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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
12 Months Ended
Oct. 02, 2021
Oct. 03, 2020
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of year $ 53 $ 52
Total realized and unrealized gains (losses), Included in earnings 0 0
Total realized and unrealized gains (losses), Included in other comprehensive income (loss) (1) 1
Purchases 20 17
Issuances 0 0
Settlements (24) (17)
Balance at end of year $ 48 $ 53