INCOME TAXES (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax Contingency [Line Items]
Effective income tax	25.60%	35.60%	23.60%	33.60%
Estimated effect on income taxes payable from foreign earnings repatriated			$ 15.0
Tax Cuts and Jobs Act of 2017, provisional income tax benefit			11.1		$ 12.1
Tax Cuts and Jobs Act, transition tax, income tax expense			1.0
Unrecognized tax benefits and related interest and penalties, all of which would affect our effective tax rate if recognized	$ 36.0		36.0
Decrease in unrecognized tax benefits due to lapse of statute of limitations	$ 1.8		1.8
Accounting Standards Update 2016-09
Income Tax Contingency [Line Items]
Effective income tax rate reconciliation, share-based compensation, excess tax benefit amount			$ (7.5)	$ (10.6)