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SHORT-TERM DEBT AND LINES OF CREDIT - SHORT-TERM BORROWINGS (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Commercial paper    
Short-term borrowings    
Commercial paper outstanding $ 1,626.8 $ 1,896.1
Weighted average interest rate on amounts outstanding 1.90% 0.26%
Average amount of commercial paper outstanding during the period $ 1,421.5  
Weighted-average interest rate on amounts outstanding during the period 0.68%  
Operating expense loans    
Short-term borrowings    
Operating expense loan outstanding $ 2.3 $ 0.9