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ACCOUNTS, NOTES AND OTHER RECEIVABLES (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Accounts Receivable, Net Current [Abstract]    
Trade $ 6,926 $ 6,471
Other 555 642
Accounts Receivable, Gross 7,481 7,113
Less - Allowance for doubtful accounts (253) (272)
Accounts Receivable, Net 7,228 6,841
Accounts Notes, And Other Receivables Paragraph Details [Abstract]    
Unbilled Contract Receivable $ 1,404 $ 1,307