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INCOME TAXES (Details 5) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits [Roll Forward]    
Beginning balance $ 36.3 $ 38.4
Increase for current year tax positions 2.1 2.9
Increase for prior year tax positions 0.3 5.4
Reductions due to statute of limitations 0.0 (0.1)
Decrease for prior year tax positions (4.9) (9.2)
Decrease due to tax settlements 0.0 (1.1)
Ending balance $ 33.8 $ 36.3