FAIR VALUE MEASUREMENTS (Basis of Fair Value Measurements on a Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Collateral Already Posted, Aggregate Fair Value	$ 3		$ 5
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],[2]	0	[1],[2]
Carrying value of interests held	0	[1],[3]	0	[1],[3]
Assets, Fair Value Disclosure	(12)	[1]	(23)	[1]
Long-term Debt, Fair Value	0	[1],[4]	0	[1],[4]
Liabilities, Fair Value Disclosure	(13)	[1]	(24)	[1]
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	[1],[5]	0	[1],[5]
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	[1],[5],[6]	0	[1],[5],[6]
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	[1],[5]	0	[1],[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	[2]	0	[2]
Carrying value of interests held	0	[3]	0	[3]
Commodities, Asset	0	[7]	3	[7]
Foreign currency, Asset	0	[7]	0	[7]
Assets, Fair Value Disclosure	778		763
Long-term Debt, Fair Value	0	[4]	0	[4]
Interest Rate Derivative Liabilities, at Fair Value	0	[7]	0	[7]
Commodities, Liability	1	[7]	4	[7]
Foreign currency, Liability	0	[7]	0	[7]
Liabilities, Fair Value Disclosure	1		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	778	[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	1,308	[2]	2,912	[2]
Carrying value of interests held	0	[3]	0	[3]
Commodities, Asset	7	[7]	11	[7]
Foreign currency, Asset	42	[7]	65	[7]
Assets, Fair Value Disclosure	2,685		4,284
Long-term Debt, Fair Value	19,692	[4]	19,467	[4]
Interest Rate Derivative Liabilities, at Fair Value	8	[7]	5	[7]
Commodities, Liability	4	[7]	2	[7]
Foreign currency, Liability	24	[7]	33	[7]
Liabilities, Fair Value Disclosure	19,728		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	38	[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	574	[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	716	[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	[2]	0	[2]
Carrying value of interests held	1,297	[3]	1,227	[3]
Commodities, Asset	0	[7]	0	[7]
Foreign currency, Asset	0	[7]	0	[7]
Assets, Fair Value Disclosure	1,297		1,227
Long-term Debt, Fair Value	0	[4]	0	[4]
Interest Rate Derivative Liabilities, at Fair Value	0	[7]	0	[7]
Commodities, Liability	0	[7]	0	[7]
Foreign currency, Liability	0	[7]	0	[7]
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]
Interest Rate Contract [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	0	[1],[7]	0	[1],[7]
Foreign Currency Contract [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(10)	[1],[7]	(20)	[1],[7]
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	(10)	[1],[7]	(20)	[1],[7]
Commodity Contract [Member] | Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset	(2)	[1],[7]	(3)	[1],[7]
Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset	(3)	[1],[7]	(4)	[1],[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	1,308	[2]	2,912	[2]
Carrying value of interests held	1,297	[3]	1,227	[3]
Commodities, Asset	5	[7]	11	[7]
Foreign currency, Asset	32	[7]	45	[7]
Assets, Fair Value Disclosure	4,748		6,251
Long-term Debt, Fair Value	19,692	[4]	19,467	[4]
Interest Rate Derivative Liabilities, at Fair Value	8	[7]	5	[7]
Commodities, Liability	2	[7]	2	[7]
Foreign currency, Liability	14	[7]	13	[7]
Liabilities, Fair Value Disclosure	19,716		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	816	[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	574	[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	$ 716	[5]	$ 695	[5]

[1] 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.

[2] 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.

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

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