NOTES PAYABLE, LONG-TERM DEBT AND AVAILABLE CREDIT FACILITIES (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Notes Payable Long Term Debt and Available Credit Facilities [Line Items]
Proceeds from issuance of long-term debt	$ 211	$ 274
InterNotes issued [Member]
Notes Payable Long Term Debt and Available Credit Facilities [Line Items]
Proceeds from issuance of long-term debt	200	217
Long Term Debt Repayment-Purchase of Ethylene Facility [Member]
Notes Payable Long Term Debt and Available Credit Facilities [Line Items]
Repayments of Debt		346
Long Term Debt entered into by Variable Interest Entities [Member]
Notes Payable Long Term Debt and Available Credit Facilities [Line Items]
Proceeds from Issuance of Debt	8	41
Long Term Debt Repayment - Variable Interest Entity [Member]
Notes Payable Long Term Debt and Available Credit Facilities [Line Items]
Repayments of Debt	$ 56	38
Redemption of Notes [Member] | Six point two five percent due June 1, 2014 [Member]
Notes Payable Long Term Debt and Available Credit Facilities [Line Items]
Repayments of Debt		124
Redemption of Notes [Member] | Six point seven five percent Due 2028 [Member]
Notes Payable Long Term Debt and Available Credit Facilities [Line Items]
Repayments of Debt		$ 51