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Basis of Presentation (Tables)
6 Months Ended
Jun. 30, 2013
Basis of Presentation  
Schedule of correcting error

Correcting this error only affected our consolidated statement of cash flows, with the impact for the six months ended June 30, 2012 presented herein, being as follows (in millions):

 
  As Reported   Error Correction   Restated

Net cash provided by operating activities

    $ 1,788       (482)       1,306  

Net cash used in investing activities

    (1,960)       336       (1,624)  

Net cash provided by financing activities

    173       146       319