Annual report pursuant to Section 13 and 15(d)

NET CHANGE IN OPERATING ASSETS AND LIABILITIES (Details)

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NET CHANGE IN OPERATING ASSETS AND LIABILITIES (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Net change in operating assets and liabilities      
(Increase) decrease in trade accounts receivable $ (212) $ (253) $ 28
(Increase) decrease in inventories (250) 35 (105)
(Increase) decrease in prepaid expenses and other assets 123 194 (163)
Increase (decrease) in accounts payable and accrued expenses 1,004 (250) (158)
Increase (decrease) in accrued taxes (306) 151 22
Increase (decrease) in other liabilities (516) (316) (556)
Net change in operating assets and liabilities $ (157) $ (439) $ (932)