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INCOME TAXES (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
INCOME TAXES        
Effective tax rate (as a percent) (37.00%) (15.60%) (12.00%) 25.40%
Benefit from the reversal of unrecognized tax positions due to statute expiration $ 2.9 $ 1.1 $ 2.9 $ 0.6
Interest on unrecognized tax position $ 0.5   1.0  
Income tax benefit from reversal of deferred tax liability due to intercompany debt restructure   $ 0.5   $ 0.5
Change in valuation allowance     0.4  
Benefit (net) related to remeasurement of existing losses     $ 0.3