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FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details 2) (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation        
Balance at beginning of period $ 1,033,000,000 $ 403,000,000 $ 571,000,000 $ 140,000,000
Total gains and (losses) (realized/unrealized) included in cost of goods sold 54,000,000 94,000,000 (27,000,000) 139,000,000
Total gains and (losses) (realized/unrealized) included in foreign exchange gains (losses) (1,000,000) (1,000,000)    
Purchases 648,000,000   1,557,000,000  
Sales (962,000,000)   (1,362,000,000)  
Issuances (33,000,000)   (58,000,000)  
Settlements (6,000,000)   (57,000,000)  
Purchases, issuances and settlements   (106,000,000)   107,000,000
Transfers into Level 3 167,000,000 19,000,000 288,000,000 30,000,000
Transfers out of Level 3 (44,000,000) (8,000,000) (56,000,000) (15,000,000)
Balance at end of period 856,000,000 401,000,000 856,000,000 401,000,000
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold 480,000,000 90,000,000 602,000,000 171,000,000
Changes in unrealized gains and (losses) relating to assets and liabilities included in Foreign exchange gains (losses) (1,000,000) (1,000,000)    
Derivatives, Net
        
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation        
Balance at beginning of period 237,000,000 49,000,000 307,000,000 31,000,000
Total gains and (losses) (realized/unrealized) included in cost of goods sold (76,000,000) (10,000,000) (119,000,000) (15,000,000)
Total gains and (losses) (realized/unrealized) included in foreign exchange gains (losses) (1,000,000) (1,000,000)    
Purchases 34,000,000   71,000,000  
Issuances (33,000,000)   (58,000,000)  
Settlements (6,000,000)   (57,000,000)  
Purchases, issuances and settlements   (2,000,000)   16,000,000
Transfers into Level 3 10,000,000 19,000,000 14,000,000 30,000,000
Transfers out of Level 3 (31,000,000) (8,000,000) (24,000,000) (15,000,000)
Balance at end of period 134,000,000 47,000,000 134,000,000 47,000,000
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold 21,000,000 8,000,000 24,000,000 80,000,000
Changes in unrealized gains and (losses) relating to assets and liabilities included in Foreign exchange gains (losses) (1,000,000) (1,000,000)    
Readily Marketable Inventories.
        
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation        
Balance at beginning of period 796,000,000 354,000,000 264,000,000 109,000,000
Total gains and (losses) (realized/unrealized) included in cost of goods sold 130,000,000 104,000,000 92,000,000 154,000,000
Purchases 614,000,000   1,486,000,000  
Sales (962,000,000)   (1,362,000,000)  
Purchases, issuances and settlements   (104,000,000)   91,000,000
Transfers into Level 3 157,000,000   274,000,000  
Transfers out of Level 3 (13,000,000)   (32,000,000)  
Balance at end of period 722,000,000 354,000,000 722,000,000 354,000,000
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold $ 459,000,000 $ 82,000,000 $ 578,000,000 $ 91,000,000