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Income Taxes Income Tax (Details) - USD ($)
$ in Millions
9 Months Ended
Jul. 03, 2021
Oct. 03, 2020
Income Tax [Line Items]    
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 23.00%  
Unrecognized Tax Benefits, Period Increase (Decrease) $ (200)  
Unrecognized Tax Benefits 2,500 $ 2,700
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit $ 400