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INCOME TAXES (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Income Tax Contingency [Line Items]      
Effective income tax 21.30% 31.70%  
Estimated effect on income taxes payable from foreign earnings repatriated $ 14.1    
Tax Cuts and Jobs Act of 2017, provisional income tax benefit     $ 12.1
Tax Cuts and Jobs Act, transition tax, income tax expense 0.8    
Unrecognized tax benefits and related interest and penalties, all of which would affect our effective tax rate if recognized 36.5    
Decrease in unrecognized tax benefits due to lapse of statute of limitations 1.8    
Accounting Standards Update 2016-09      
Income Tax Contingency [Line Items]      
Effective income tax rate reconciliation, share-based compensation, excess tax benefit amount $ 6.2 $ 9.3