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ACCOUNTS, NOTES AND OTHER RECEIVABLES (Details) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Accounts Receivable, Net Current [Abstract]    
Trade $ 6,979 $ 6,926
Other 545 555
Accounts receivable, gross 7,524 7,481
Less: Allowance for doubtful accounts (256) (253)
Accounts receivable, net 7,268 7,228
Accounts Notes, And Other Receivables Paragraph Details [Abstract]    
Unbilled contract receivable $ 1,558 $ 1,404