v2.4.0.6
Noncontrolling Interests (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Activity for equity attributable to noncontrolling interests        
Beginning Balance     $ 65,749 [1] $ 69,124
Net Income 1,813 2,631 7,057 9,092
Dividends paid     (2,469) (2,761)
Repurchase of company common stock     (5,098) (7,984)
Distributions to noncontrolling interests and other     (63) (70)
Separation of Downstream business     (18,654) 0
Other     1,355 (1,060)
Ending Balance 47,877 66,341 47,877 66,341
Common Stockholders' Equity [Member]
        
Activity for equity attributable to noncontrolling interests        
Beginning Balance     65,239 68,577
Net Income     7,002 9,046
Dividends paid     (2,469) (2,761)
Repurchase of company common stock     (5,098) (7,984)
Distributions to noncontrolling interests and other     0 0
Separation of Downstream business     (18,623) 0
Other     1,355 (1,057)
Ending Balance 47,406 65,821 47,406 65,821
Noncontrolling Interest [Member]
        
Activity for equity attributable to noncontrolling interests        
Beginning Balance     510 547
Net Income     55 46
Dividends paid       0
Repurchase of company common stock       0
Distributions to noncontrolling interests and other     (63) (70)
Separation of Downstream business     (31) 0
Other     0 (3)
Ending Balance $ 471 $ 520 $ 471 $ 520
[1] **Certain amounts have been restated to reflect a prior period adjustment. See Note 16—Accumulated Other Comprehensive Income, in the Notes to Consolidated Financial Statements.