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BORROWINGS Part 2 (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Credit Facilities [Abstract]              
Borrowings due within one year $ 349     $ 171 $ 349 $ 171  
Early debt extinguishment costs         1 0 $ 7
Revolving Credit Facility [Member]              
Credit Facilities [Abstract]              
Line of Credit Facility, Current Borrowing Capacity $ 1,500       1,500    
Line of Credit Facility, Maximum Month-end Outstanding Amount     $ 400   $ 0 $ 0  
Line of Credit Facility, Expiration Date         Oct. 31, 2023    
Repayments of Lines of Credit   $ 400          
Commercial Paper [Member]              
Credit Facilities [Abstract]              
Debt, Weighted Average Interest Rate 0.25%     2.03% 0.25% 2.03%  
Commercial Paper Borrowings $ 50     $ 170 $ 50 $ 170  
Accounts Receivable Facility              
Credit Facilities [Abstract]              
Line of Credit Facility, Expiration Date         Apr. 30, 2020    
Repayments of Lines of Credit     350        
Line of Credit Facility, Increase (Decrease), Net         $ 250    
Proceeds from Lines of Credit     $ 350        
364-Day Term Loan [Member]              
Credit Facilities [Abstract]              
Borrowings due within one year 250       250    
Early debt extinguishment costs   $ 1          
2.7% notes due January 2020 [Member]              
Credit Facilities [Abstract]              
Extinguishment of Debt, Amount       250      
4.5% debentures due January 2021 [Member]              
Credit Facilities [Abstract]              
Long-term Debt 0     $ 185 $ 0 $ 185  
Extinguishment of Debt, Amount $ 185