FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details 2) (USD $) In Millions	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Balance at beginning of period	$ 856	$ 401	$ 571	$ 140
Total gains and (losses) (realized/unrealized) included in cost of goods sold	23	286	(3)	425
Total gains and (losses) (realized/unrealized) included in foreign exchange gains (losses)	2	(2)	2	(2)
Purchases	288		1,845
Sales	(750)		(2,112)
Issuances	(30)		(89)
Settlements	17		(40)
Purchases, issuances and settlements		(262)		(155)
Transfers into Level 3	125	7	413	37
Transfers out of Level 3	(100)	1	(156)	(14)
Balance at end of period	431	431	431	431
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold	15	300	214	427
Changes in unrealized gains and (losses) relating to assets and liabilities included in Foreign exchange gains (losses)	2	(2)	3	(3)
Derivatives, Net
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Balance at beginning of period	134	47	307	31
Total gains and (losses) (realized/unrealized) included in cost of goods sold	(42)	156	(160)	141
Total gains and (losses) (realized/unrealized) included in foreign exchange gains (losses)	2	(2)	2	(2)
Purchases	24		95
Sales	(1)		(1)
Issuances	(30)		(89)
Settlements	17		(40)
Purchases, issuances and settlements		(37)		(21)
Transfers into Level 3	1	5	15	35
Transfers out of Level 3	(27)	1	(51)	(14)
Balance at end of period	78	170	78	170
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold	(15)	194	(30)	268
Changes in unrealized gains and (losses) relating to assets and liabilities included in Foreign exchange gains (losses)	2	(2)	3	(3)
Readily Marketable Inventories
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation
Balance at beginning of period	722	354	264	109
Total gains and (losses) (realized/unrealized) included in cost of goods sold	65	130	157	284
Purchases	264		1,750
Sales	(749)		(2,111)
Purchases, issuances and settlements		(225)		(134)
Transfers into Level 3	124	2	398	2
Transfers out of Level 3	(73)		(105)
Balance at end of period	353	261	353	261
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold	$ 30	$ 106	$ 244	$ 159

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This element represents total gains or losses for the period (realized and unrealized), arising from assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in cost of sales.

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- Definition

Issues that have taken place during the period in relation to assets and liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.

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- Definition

Purchases that have taken place during the period in relation to assets and liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.

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- Definition

This element represents purchases, sales, issuances, and settlements (net) which have taken place during the period in relation to assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3).

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- Definition

Sales that have taken place during the period in relation to assets and liabilities measured at fair value and categorized within Level 3 of the fair value hierarchy.

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- Definition

Settlements that have taken place during the period in relation to assets measured at fair value and categorized within Level 3 of the fair value hierarchy.

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- Definition

This element represents transfers into assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3) which have taken place during the period.

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- Definition

This element represents transfers out of assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3) which have taken place during the period.

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- Definition

This element represents total unrealized gains or losses for the period, arising from assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in cost of sales and which are still held at the reporting date.

+ Details

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- Definition

This element represents total unrealized gains or losses for the period, arising from assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3), which are included in foreign exchange gains (losses) and which are still held at the reporting date.

+ Details

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- Definition

This element represents assets and liabilities measured at fair value using significant unobservable inputs (Level 3) which is required for reconciliation purposes of beginning and ending balances.

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