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ACCOUNTS, NOTES AND OTHER RECEIVABLES (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Accounts Receivable, Net Current [Abstract]    
Trade $ 6,940 $ 6,926
Other 715 555
Accounts receivable, Gross 7,655 7,481
Less - Allowance for doubtful accounts (226) (253)
Accounts receivable, Net 7,429 7,228
Accounts Notes, And Other Receivables Paragraph Details [Abstract]    
Unbilled contract receivable $ 1,495 $ 1,404