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SHORT-TERM DEBT - Credit Facility (Details) - USD ($)
3 Months Ended
Mar. 13, 2019
Jan. 31, 2022
Jan. 31, 2021
Jun. 18, 2021
Apr. 21, 2021
Oct. 21, 2019
Short-term Debt            
Repayments of commercial paper   $ (240,000,000) $ (546,000,000)      
Proceeds from Commercial Paper   240,000,000 $ 785,000,000      
Line of Credit [Member] | 5 yr Unsecured Credit Facility            
Short-term Debt            
Initiation date of credit facility Mar. 13, 2019          
Maximum borrowing capacity of credit facility $ 1,000,000,000       $ 1,350,000,000  
Credit faciity terms (in years) five          
Expiration date of credit facility Mar. 13, 2024          
Amount outstanding on credit facility   0        
Line of Credit [Member] | Additional Incremental Term Loan Facility            
Short-term Debt            
Maximum borrowing capacity of credit facility         $ 500,000,000 $ 500,000,000
Amount outstanding on credit facility   0        
Line of Credit [Member] | Commercial Paper            
Short-term Debt            
Maximum borrowing capacity of credit facility       $ 1,350,000,000    
Amount outstanding on credit facility   $ 0