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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, 2016
Oct. 03, 2015
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance at beginning of year $ 61 $ 67
Total realized and unrealized gains (losses), Included in earnings 0 0
Total realized and unrealized gains (losses), Included in other comprehensive income (loss) 0 0
Purchases 12 20
Issuances 0 0
Settlements (16) (26)
Balance at end of year 57 61
Total gains (losses) for the periods included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities still held at end of year $ 0 $ 0