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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. 01, 2022
Oct. 02, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of year $ 48 $ 53
Total unrealized gains (losses) included in other comprehensive income (loss) (3) (1)
Purchases 8 20
Settlements (18) (24)
Balance at end of period $ 35 $ 48