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Estimates (Schedule Of Net Changes In Operating Assets And Liabilities Included Cash Flows From Operating Activities) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Supplemental Cash Flow Information [Abstract]      
Accounts receivable $ (3,356) $ 1,163 $ (473)
Accounts receivable from related companies 38 (290) (69)
Inventories (19) (271) (19)
Other current assets 216 (172) (117)
Other non-current assets, net 1 (7) (102)
Accounts payable 3,834 (1,327) 146
Accounts payable to related companies (34) 367 (32)
Accrued and other current liabilities 238 163 (44)
Other non-current liabilities 117 8 (133)
Derivative assets and liabilities, net (88) 69 218
Net change in operating assets and liabilities, net of effects of acquisitions $ 515 $ 47 $ (391)