INCOME TAXES (Details 1)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Tax Contingency [Line Items]
Statutory federal tax rate	35.00%	35.00%	35.00%	35.00%
Salt depletion	(11.60%)	(17.30%)	(11.60%)	19.60%
Stock-based compensation	(0.90%)	0.00%	(5.10%)	0.00%
Foreign rate differential	(8.90%)	(4.10%)	(8.90%)	3.60%
U.S. tax on foreign earnings	8.80%	4.00%	8.80%	(3.40%)
Dividends paid to CEOP	(0.50%)	(0.80%)	(0.50%)	1.10%
State income taxes, net	0.00%	2.80%	0.00%	6.10%
Change in tax contingencies	0.00%	1.00%	0.00%	(0.80%)
Change in tax contingencies	0.40%	0.60%	(16.90%)	(7.20%)
Return to provision	(3.20%)	(3.50%)	(0.50%)	9.00%
Impact of tax rate changes	(7.10%)	(2.00%)	(7.50%)	0.70%
Other, net	0.70%	2.10%	0.70%	(0.80%)
Effective tax rate	12.70%	17.80%	(6.50%)	62.90%