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ACCOUNTS, NOTES AND OTHER RECEIVABLES
9 Months Ended
Sep. 30, 2013
Accounts, Notes And Other Receivables [Abstract]  
Accounts, Notes and Other Receivables

Note 7. Accounts, Notes and Other Receivables

       
   September 30,  December 31,
   2013  2012
       
 Trade$7,647 $6,940
 Other 547  737
   8,194  7,677
 Less: Allowance for doubtful accounts (244)  (248)
  $7,950 $7,429

Trade Receivables includes $ 1,639 and $1,495 million of unbilled balances under long-term contracts as of September 30, 2013 and December 31, 2012, respectively. These amounts are billed in accordance with the terms of customer contracts to which they relate.