FAIR VALUE MEASUREMENTS (Basis of Fair Value Measurements on a Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral Already Posted, Aggregate Fair Value	$ 4		$ 5
Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	[1]	0	[1]
Carrying value of interests held	0	[2]	0	[2]
Commodities, Asset	3	[3]	3	[3]
Foreign currency, Asset	0	[3]	0	[3]
Assets, Fair Value Disclosure	790		763
Long-term Debt, Fair Value	0	[4]	0	[4]
Interest Rate Derivative Liabilities, at Fair Value	0	[3]	0	[3]
Commodities, Liability	4	[3]	4	[3]
Foreign currency, Liability	0	[3]	0	[3]
Liabilities, Fair Value Disclosure	4		4
Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	787	[5]	760	[5]
Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | US Treasury and Government [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	[5],[6]	0	[5],[6]
Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	[5]	0	[5]
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	1,634	[1]	2,912	[1]
Carrying value of interests held	0	[2]	0	[2]
Commodities, Asset	19	[3]	11	[3]
Foreign currency, Asset	27	[3]	65	[3]
Assets, Fair Value Disclosure	2,973		4,284
Long-term Debt, Fair Value	19,349	[4]	19,467	[4]
Interest Rate Derivative Liabilities, at Fair Value	6	[3]	5	[3]
Commodities, Liability	11	[3]	2	[3]
Foreign currency, Liability	43	[3]	33	[3]
Liabilities, Fair Value Disclosure	19,409		19,507
Significant Other Observable Inputs (Level 2) [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	36	[5]	37	[5]
Significant Other Observable Inputs (Level 2) [Member] | US Treasury and Government [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	559	[5],[6]	564	[5],[6]
Significant Other Observable Inputs (Level 2) [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	698	[5]	695	[5]
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	[1]	0	[1]
Carrying value of interests held	1,339	[2]	1,227	[2]
Commodities, Asset	0	[3]	0	[3]
Foreign currency, Asset	0	[3]	0	[3]
Assets, Fair Value Disclosure	1,339		1,227
Long-term Debt, Fair Value	0	[4]	0	[4]
Interest Rate Derivative Liabilities, at Fair Value	0	[3]	0	[3]
Commodities, Liability	0	[3]	0	[3]
Foreign currency, Liability	0	[3]	0	[3]
Liabilities, Fair Value Disclosure	0		0
Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	[5]	0	[5]
Significant Unobservable Inputs (Level 3) [Member] | US Treasury and Government [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	[5],[6]	0	[5],[6]
Significant Unobservable Inputs (Level 3) [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	[5]	0	[5]
Netting and Collateral [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0	[1],[7]	0	[1],[7]
Carrying value of interests held	0	[2],[7]	0	[2],[7]
Commodities, Asset	(9)	[3],[7]	(3)	[3],[7]
Foreign currency, Asset	(14)	[3],[7]	(20)	[3],[7]
Assets, Fair Value Disclosure	(23)	[7]	(23)	[7]
Long-term Debt, Fair Value	0	[4],[7]	0	[4],[7]
Interest Rate Derivative Liabilities, at Fair Value	0	[3],[7]	0	[3],[7]
Commodities, Liability	(10)	[3],[7]	(4)	[3],[7]
Foreign currency, Liability	(14)	[3],[7]	(20)	[3],[7]
Liabilities, Fair Value Disclosure	(24)	[7]	(24)	[7]
Netting and Collateral [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	[5],[7]	0	[5],[7]
Netting and Collateral [Member] | US Treasury and Government [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	[5],[6],[7]	0	[5],[6],[7]
Netting and Collateral [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	0	[5],[7]	0	[5],[7]
Total Fair Value [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	1,634	[1]	2,912	[1]
Carrying value of interests held	1,339	[2]	1,227	[2]
Commodities, Asset	13	[3]	11	[3]
Foreign currency, Asset	13	[3]	45	[3]
Assets, Fair Value Disclosure	5,079		6,251
Long-term Debt, Fair Value	19,349	[4]	19,467	[4]
Interest Rate Derivative Liabilities, at Fair Value	6	[3]	5	[3]
Commodities, Liability	5	[3]	2	[3]
Foreign currency, Liability	29	[3]	13	[3]
Liabilities, Fair Value Disclosure	19,389		19,487
Total Fair Value [Member] | Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	823	[5]	797	[5]
Total Fair Value [Member] | US Treasury and Government [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	559	[5],[6]	564	[5],[6]
Total Fair Value [Member] | Corporate Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$ 698	[5]	$ 695	[5]

[1] Treasury Bills and money market funds included in "Cash and cash equivalents" in the consolidated balance sheets and held at amortized cost, which approximates fair value.

[2] Included in “Accounts and notes receivable – Other” in the consolidated balance sheets. See Note 9 for additional information on transfers of financial assets.

[3] See Note 6 for the classification of derivatives in the consolidated balance sheets.

[4] See Note 6 for information on fair value measurements of long-term debt.

[5] The Company’s investments in equity and debt securities are primarily classified as available-for-sale and are included in “Other investments” in the consolidated balance sheets.

[6] U.S. Treasury obligations, U.S. agency obligations, agency mortgage-backed securities and other municipalities’ obligations.

[7] Cash collateral amounts represent the estimated net settlement amount when applying netting and set-off rights included in master netting arrangements between the Company and its counterparties and the payable or receivable for cash collateral held or placed with the same counterparty.