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Debt (Narrative) (Details) - USD ($)
$ in Millions
6 Months Ended
Mar. 15, 2022
Apr. 02, 2022
Oct. 02, 2021
Sep. 30, 2021
Debt Instrument [Line Items]        
Document Period End Date   Apr. 02, 2022    
Debt Instrument, Unamortized Discount   $ 40 $ 42  
2.25% Notes due August 2021        
Debt Instrument [Line Items]        
Debt Instrument, Interest Rate, Stated Percentage   2.25%    
4.50% Senior notes due June 2022        
Debt Instrument [Line Items]        
Long-term Debt, Gross   $ 0 1,000  
Debt Instrument, Interest Rate, Stated Percentage   4.50%    
Extinguishment of Debt, Amount $ 1,000      
Revolving Credit Facility [Member]        
Debt Instrument [Line Items]        
Maximum borrowing capacity     2,250 $ 1,750
Amount available for borrowing under credit facility   $ 2,250    
Revolving credit facility   0 0  
Line of Credit Facility, Contingent Additional Borrowing Capacity     500  
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   93    
Commercial paper        
Debt Instrument [Line Items]        
Maximum borrowing capacity   1,500    
Commercial paper   $ 0 $ 0