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Net Gains or Losses Recognized on Economic Exposures Associated With Foreign Currency Exchange Contracts (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 03, 2021
Jun. 27, 2020
Jul. 03, 2021
Jun. 27, 2020
Costs and Expenses        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gain (loss) on foreign currency denominated assets and liabilities $ 16 $ 80 $ 77 $ (92)
Net gain (loss) on foreign exchange risk management contracts not designated as hedges (42) (103) (138) 56
Net gain (loss) (26) (23) (61) (36)
Interest Expense        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gain (loss) on foreign currency denominated assets and liabilities (19) (26) (74) 26
Net gain (loss) on foreign exchange risk management contracts not designated as hedges 20 25 75 (27)
Net gain (loss) 1 (1) 1 (1)
Income Taxes        
Derivative Instruments, Gain (Loss) [Line Items]        
Net gain (loss) on foreign currency denominated assets and liabilities 5 (4) (29) (11)
Net gain (loss) on foreign exchange risk management contracts not designated as hedges 0 8 30 5
Net gain (loss) $ 5 $ 4 $ 1 $ (6)