SHORT-TERM DEBT AND LINES OF CREDIT - SHORT-TERM BORROWINGS (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2019	Dec. 31, 2018
Short-term borrowings
Commercial paper outstanding	$ 686.4	$ 1,440.1
Commercial paper
Short-term borrowings
Commercial paper outstanding	$ 686.4	$ 1,440.1
Weighted-average interest rate on amounts outstanding	2.23%	2.92%
Average amount outstanding during the period	$ 1,190.7
Weighted-average interest rate during the period	2.67%

Carrying value as of the balance sheet date of short-term borrowings using unsecured obligations issued by banks, corporations and other borrowers to investors. The maturities of these money market securities generally do not exceed 270 days.

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