v3.3.1.900
FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Details 2) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Reconciliation of Assets and Liabilities Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3)        
Balance at beginning of period $ 745 $ 740 $ 220 $ 243
Purchases 165 242 1,193 1,804
Sales (647) (939) (1,442) (2,168)
Issuances   13 (328) (381)
Settlements 170 37 327 303
Transfers into Level 3 166 195 480 544
Transfers out of Level 3 (145) (12) (298) (194)
Balance at end of period 762 226 762 226
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 308 (50) 610 75
Changes in unrealized gains and (losses) relating to assets and liabilities (31) (25) 31 9
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 192 (13) (2) 20
Purchases   (8) 1 5
Sales   4    
Issuances   20   19
Settlements (91) (47) (139) (189)
Transfers into Level 3 (1) 27   21
Transfers out of Level 3   5 (3) 35
Balance at end of period 317 (24) 317 (24)
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 217 (12) 460 65
Changes in unrealized gains and (losses) relating to assets and liabilities (35) (7) 18 48
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 910 873 255 298
Purchases 170 254 1,197 1,804
Sales (647) (943) (1,442) (2,176)
Transfers into Level 3 167 171 683 534
Transfers out of Level 3 (98) (6) (249) (158)
Balance at end of period 611 310 611 310
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 109 (39) 167 8
Changes in unrealized gains and (losses) relating to assets and liabilities 24 (19) 15 (43)
Trade Accounts Receivable/Payable, 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 (357) (120) (33) (75)
Purchases (5) (4) (5) (5)
Sales       8
Issuances   (7) (328) (400)
Settlements 261 84 466 492
Transfers into Level 3   (3) (203) (11)
Transfers out of Level 3 (47) (11) (46) (71)
Balance at end of period (166) (60) (166) (60)
Trade Accounts Receivable/Payable, 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 (18) 1 (17) 2
Changes in unrealized gains and (losses) relating to assets and liabilities $ (20) $ 1 $ (2) $ 4