INCOME TAXES (Narrative) (Details) - USD ($) $ in Millions			3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 22, 2017	Dec. 21, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Operating Loss Carryforwards [Line Items]
Effective tax rates	21.00%	35.00%					21.00%	28.00%	35.00%
Provision to return adjustment for entities in France			$ (6.4)	$ (1.0)	$ (5.3)	$ (1.5)
Liability for uncertain tax positions related to state taxing jurisdictions			0.2		0.2
Accrued interest and penalties			0.1		0.1
Deferred tax liablity changes to indefinite reinvestment assertion			$ 7.9		7.9
Canada
Operating Loss Carryforwards [Line Items]
Reverse of valuation allowance on deferred tax assets of certain Canadian subsidiaries					28.5
France
Operating Loss Carryforwards [Line Items]
Provision to return adjustment for entities in France					$ 6.9