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FAIR VALUE MEASUREMENTS (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
FAIR VALUE MEASUREMENTS    
Derivative Assets $ 0.0 $ 0.0
Derivative Liabilities 0.0 0.0
Aggregate carrying value of total debt 1,931.5 1,931.8
Estimated fair value of total debt $ 2,022.7 $ 2,037.6