FAIR VALUE MEASUREMENTS (Basis of Fair Value Measurements on a Recurring Basis) (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2013		Dec. 31, 2012
Quoted Prices in Active Markets for Identical Items (Level 1) [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]
Interest Rate Derivative Assets, at Fair Value	0	[3]	0	[3]
Commodities	7	[3]	9	[3]
Foreign currency	0	[3]	0	[3]
Assets, Fair Value Disclosure	675		711
Long-term Debt, Fair Value	0	[4]	0	[4]
Interest Rate Derivative Liabilities, at Fair Value	0	[3]	0	[3]
Commodities	13	[3]	16	[3]
Foreign currency	0	[3]	0	[3]
Liabilities, Fair Value Disclosure	13		16
Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	668	[5]	702	[5]
Quoted Prices in Active Markets for Identical Items (Level 1) [Member] | US Treasury and Government [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, 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, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	2,123	[1]	1,953	[1]
Carrying value of interests held	0	[2]	0	[2]
Interest Rate Derivative Assets, at Fair Value	1	[3]	1	[3]
Commodities	14	[3]	22	[3]
Foreign currency	50	[3]	55	[3]
Assets, Fair Value Disclosure	3,458		3,390
Long-term Debt, Fair Value	20,260	[4]	23,762	[4]
Interest Rate Derivative Liabilities, at Fair Value	4	[3]	6	[3]
Commodities	6	[3]	11	[3]
Foreign currency	39	[3]	41	[3]
Liabilities, Fair Value Disclosure	20,309		23,820
Significant Other Observable Inputs (Level 2) [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	34	[5]	38	[5]
Significant Other Observable Inputs (Level 2) [Member] | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	553	[5],[6]	565	[5],[6]
Significant Other Observable Inputs (Level 2) [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	683	[5]	756	[5]
Significant Unobservable Inputs (Level 3) [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	1,291	[2]	1,057	[2]
Interest Rate Derivative Assets, at Fair Value	0	[3]	0	[3]
Commodities	0	[3]	0	[3]
Foreign currency	0	[3]	0	[3]
Assets, Fair Value Disclosure	1,291		1,057
Long-term Debt, Fair Value	0	[4]	0	[4]
Interest Rate Derivative Liabilities, at Fair Value	0	[3]	0	[3]
Commodities	0	[3]	0	[3]
Foreign currency	0	[3]	0	[3]
Liabilities, Fair Value Disclosure	0		0
Significant Unobservable Inputs (Level 3) [Member] | Equity Securities [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, 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, 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, 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]
Interest Rate Derivative Assets, at Fair Value	0	[3],[7]	0	[3],[7]
Commodities	(3)	[3],[7]	(5)	[3],[7]
Foreign currency	(15)	[3],[7]	(21)	[3],[7]
Assets, Fair Value Disclosure	(18)	[7]	(26)	[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	(13)	[3],[7]	(20)	[3],[7]
Foreign currency	(15)	[3],[7]	(21)	[3],[7]
Liabilities, Fair Value Disclosure	(28)	[7]	(41)	[7]
Netting and Collateral [Member] | Equity Securities [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, 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, 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, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	2,123	[1]	1,953	[1]
Carrying value of interests held	1,291	[2]	1,057	[2]
Interest Rate Derivative Assets, at Fair Value	1	[3]	1	[3]
Commodities	18	[3]	26	[3]
Foreign currency	35	[3]	34	[3]
Assets, Fair Value Disclosure	5,406		5,132
Long-term Debt, Fair Value	20,260	[4]	23,762	[4]
Interest Rate Derivative Liabilities, at Fair Value	4	[3]	6	[3]
Commodities	6	[3]	7	[3]
Foreign currency	24	[3]	20	[3]
Liabilities, Fair Value Disclosure	20,294		23,795
Total Fair Value [Member] | Equity Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	702	[5]	740	[5]
Total Fair Value [Member] | US Treasury and Government [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	553	[5],[6]	565	[5],[6]
Total Fair Value [Member] | Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale Securities, Fair Value Disclosure	$ 683	[5]	$ 756	[5]

[1] Primarily Treasury Bills 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 adjustments to long-term debt, included at cost in the consolidated balance sheets.

[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.