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Debt (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 02, 2021
Dec. 28, 2019
Oct. 03, 2020
Mar. 28, 2020
Debt Instrument [Line Items]        
Document Period End Date Jan. 02, 2021      
Repayments of Commercial Paper $ 0 $ 4,855    
Repayments of Long-term Lines of Credit 0 $ 250    
Debt Instrument, Unamortized Discount 44   $ 45  
Term Loan Facility Due March 2022 [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Unused Borrowing Capacity, Amount       $ 1,500
Long-term Debt, Gross $ 1,500   1,500  
Debt Instrument, Interest Rate, Stated Percentage 1.69%      
Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Maximum borrowing capacity $ 1,750      
Amount available for borrowing under credit facility 1,750      
Revolving credit facility 0   0  
Standby Letters of Credit [Member]        
Debt Instrument [Line Items]        
Letters of Credit Outstanding, Amount 0      
Bilateral Letters Of Credit [Member]        
Debt Instrument [Line Items]        
Letters of Credit Outstanding, Amount 101      
Commercial paper        
Debt Instrument [Line Items]        
Maximum borrowing capacity 1,000      
Commercial paper $ 0   $ 0