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SHORT-TERM DEBT AND LINES OF CREDIT - SHORT-TERM BORROWINGS (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Commercial paper    
Short-term borrowings    
Commercial paper outstanding $ 1,545.3 $ 1,643.5
Weighted average interest rate on amounts outstanding 5.46% 4.64%
Average amount of commercial paper outstanding during the period $ 1,053.3  
Weighted-average interest rate on amounts outstanding during the period 5.17%  
Operating expense loans    
Short-term borrowings    
Operating expense loan outstanding $ 4.0 $ 3.6