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INCOME TAXES (Taxes Paid) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Income taxes    
Income taxes paid (in dollars) $ 8.9 $ 2.5
Income tax refunds received (in dollars)   $ 1.1
Maximum    
Income taxes    
Income tax refunds received (in dollars) $ 0.1