v2.4.0.8
FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details 2) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Reconciliation of Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)        
Balance at beginning of period $ 1,156 $ 739 $ 502 $ 281
Purchases 261 512 1,213 1,279
Sales (239) (350) (504) (875)
Issuances 1 1 1 3
Settlements (109) (101) (181) (83)
Transfers into Level 3 261 857 408 1,022
Transfers out of Level 3 (146) (11) (145) (90)
Balance at end of period 1,309 2,007 1,309 2,007
Cost of goods sold
        
Reconciliation of Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)        
Total gains and losses (realized/unrealized) included in cost of goods sold 126 362 17 476
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold 311 745 1,074 1,666
Derivatives, net
        
Reconciliation of Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)        
Balance at beginning of period (31) 62 66 (2)
Purchases   1   3
Sales   1 1 1
Issuances 1 1 1 3
Settlements (109) (101) (182) (83)
Transfers into Level 3 101 55 99 41
Transfers out of Level 3 6 (2) 7 (16)
Balance at end of period 89 187 89 187
Derivatives, net | Cost of goods sold
        
Reconciliation of Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)        
Total gains and losses (realized/unrealized) included in cost of goods sold 123 172 99 246
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold 120 145 147 193
Readily marketable inventories
        
Reconciliation of Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)        
Balance at beginning of period 1,187 677 436 283
Purchases 261 511 1,213 1,276
Sales (239) (351) (505) (876)
Settlements     1  
Transfers into Level 3 160 802 309 981
Transfers out of Level 3 (152) (9) (152) (74)
Balance at end of period 1,220 1,820 1,220 1,820
Readily marketable inventories | Cost of goods sold
        
Reconciliation of Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)        
Total gains and losses (realized/unrealized) included in cost of goods sold 3 190 (82) 230
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold $ 191 $ 600 $ 927 $ 1,473