v2.4.0.6
FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details 2) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS    
Significant transfers into Level 1 $ 0 $ 0
Significant transfers out of Level 1 0 0
Reconciliation of Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)    
Balance at beginning of period 502 281
Purchases 952 767
Sales (266) (526)
Issuances   (1)
Settlements (73) 17
Transfers into Level 3 148 166
Transfers out of Level 3 1 (80)
Balance at end of period 1,156 739
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold 597 651
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 (108) 115
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 66 (2)
Purchases   2
Issuances   (1)
Settlements (73) 17
Transfers into Level 3 (1) (14)
Transfers out of Level 3 1 (15)
Balance at end of period (31) 62
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold (106) 83
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 (24) 75
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 436 283
Purchases 952 765
Sales (266) (526)
Transfers into Level 3 149 180
Transfers out of Level 3   (65)
Balance at end of period 1,187 677
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold 703 568
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 $ (84) $ 40