NOTES PAYABLE, LONG-TERM DEBT AND AVAILABLE CREDIT FACILITIES (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Notes Payable Long Term Debt and Available Credit Facilities [Line Items]
Proceeds from issuance of long-term debt	$ 102	$ 138
InterNotes issued [Member]
Notes Payable Long Term Debt and Available Credit Facilities [Line Items]
Proceeds from issuance of long-term debt	93	99
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 long-term debt		26
Proceeds from Issuance of Debt	3
Long Term Debt Repayment - Variable Interest Entity [Member]
Notes Payable Long Term Debt and Available Credit Facilities [Line Items]
Repayments of Debt	$ 5	$ 5