v2.4.0.8
FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details 2) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 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 $ 1,309 $ 2,007 $ 502 $ 281
Total gains and losses (realized/unrealized) included in cost of goods sold (153) (83) (136) 393
Purchases 385 361 1,598 1,641
Sales (905) (902) (1,409) (1,777)
Issuances (2) (1) (4) (4)
Settlements (40) (93) (222) (177)
Transfers into Level 3 267 201 677 1,223
Transfers out of Level 3 (32) (86) (177) (176)
Balance at end of period 829 1,404 829 1,404
Cost of goods sold
        
Reconciliation of Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)        
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold 90 (469) 604 1,014
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 89 187 66 (2)
Total gains and losses (realized/unrealized) included in cost of goods sold (50) 93 49 339
Purchases       3
Sales   2 1 3
Issuances (2) (1) (4) (4)
Settlements (40) (93) (222) (177)
Transfers into Level 3 2 4 102 46
Transfers out of Level 3 (24) 85 (17) 69
Balance at end of period (25) 277 (25) 277
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)        
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold (55) 159 56 280
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 1,220 1,820 436 283
Total gains and losses (realized/unrealized) included in cost of goods sold (103) (176) (185) 54
Purchases 385 361 1,598 1,638
Sales (905) (904) (1,410) (1,780)
Transfers into Level 3 265 197 575 1,177
Transfers out of Level 3 (8) (171) (160) (245)
Balance at end of period 854 1,127 854 1,127
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)        
Changes in unrealized gains and (losses) relating to assets and liabilities included in Cost of goods sold $ 145 $ (628) $ 548 $ 734