COMMITMENTS AND CONTINGENCIES (Narrative) (Details)	1 Months Ended	3 Months Ended
	May. 31, 2007 entity mi	Mar. 31, 2016 USD ($)
Commitments And Contingencies Disclosure [Line Items]
Number of other companies to perform a Remedial Investigation/ Feasibility Study related to the Lower Passaic River Clean-Up lawsuit | entity	70
Number of miles of the River used in the Remedial Investigation/Feasibility Study | mi	17
Texas Brine and Occidental Chemical Co [Member]
Commitments And Contingencies Disclosure [Line Items]
Total amount of damages claimed		$ 500,000,000
Minimum [Member] | Cooperating Parties Group [Member]
Commitments And Contingencies Disclosure [Line Items]
Estimated implementation costs		475,000,000
Maximum [Member] | EPA [Member]
Commitments And Contingencies Disclosure [Line Items]
Estimated implementation costs		1,380,000,000
Maximum [Member] | Cooperating Parties Group [Member]
Commitments And Contingencies Disclosure [Line Items]
Estimated implementation costs		725,000,000
Standby Letters of Credit [Member]
Commitments And Contingencies Disclosure [Line Items]
Other Liabilities		$ 39,864,000