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SHORT-TERM DEBT Credit Facility (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 13, 2019
Jan. 31, 2020
Jan. 31, 2019
Oct. 21, 2019
Line of Credit Facility        
Proceeds from Lines of Credit   $ 432 $ 0  
Repayments of revolving credit facility   372 $ 0  
Other Short-term loan facilities        
Short-term loan facility   500    
Other short term loan borrowing capacity       $ 500
Other Short-term Borrowings   0    
Revolving Credit Facility [Member]        
Line of Credit Facility        
Initiation date of credit facility Mar. 13, 2019      
Expiration date of credit facility Mar. 13, 2024      
Proceeds from Lines of Credit   432    
Repayments of revolving credit facility   372    
Credit faciity terms (in years) five      
Maximum borrowing capacity of credit facility $ 1,000      
Amount outstanding on credit facility   $ 175