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, 2020
Dec. 31, 2019
Dec. 31, 2018
Net change in operating assets and liabilities      
(Increase) decrease in trade accounts receivable $ 882 $ (158) $ 27
(Increase) decrease in inventories 99 (183) (203)
(Increase) decrease in prepaid expenses and other assets 78 (87) (221)
Increase (decrease) in accounts payable and accrued expenses (860) 1,318 (251)
Increase (decrease) in accrued taxes (16) 96 (17)
Increase (decrease) in other liabilities 507 (620) (575)
Net change in operating assets and liabilities $ 690 $ 366 $ (1,240)