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ACCOUNTS, NOTES AND OTHER RECEIVABLES (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Accounts Receivable, Net Current [Abstract]    
Trade $ 6,946 $ 6,926
Other 529 555
Accounts receivable, gross 7,475 7,481
Less: Allowance for doubtful accounts 225 253
Accounts receivable, net 7,250 7,228
Accounts Notes, And Other Receivables Paragraph Details [Abstract]    
Unbilled contract receivable $ 1,538 $ 1,404