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, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Net change in operating assets and liabilities      
(Increase) decrease in trade accounts receivable $ (562) $ (41) $ (404)
(Increase) decrease in inventories (447) 182 (50)
(Increase) decrease in prepaid expenses and other assets (350) (148) (332)
Increase (decrease) in accounts payable and accrued expenses 63 656 319
Increase (decrease) in accrued taxes (132) (266) 81
Increase (decrease) in other liabilities (465) (13) (178)
Net change in operating assets and liabilities $ (1,893) $ 370 $ (564)