DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Summary of Derivative Financial Instruments Used to Manage Currency Exchange Rate Risk and Interest Rate Risk (Details) - Derivatives designated as hedging instruments - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Foreign currency forward exchange contracts
Derivative Financial Instruments
Derivative notional amount	$ 1,484.8	$ 1,336.5
Cross currency swap contracts
Derivative Financial Instruments
Derivative notional amount	$ 300.0	$ 300.0