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Supplemental Information to Statements Of Cash Flows (Schedule Of Supplemental Information To Statements Of Cash Flows) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Changes in assets and liabilities, net:      
Accounts receivable $ (142) $ (526) $ 231
Other current assets (119) 30 (97)
Other long-term assets 90 12 (9)
Accounts payable and revenues and royalties payable 152 539 (109)
Other current liabilities (97) (18) (68)
Other long-term liabilities (110) (153) (43)
Total 226 116 95
Supplementary cash flow data - total operations:      
Interest paid 370 404 259
Income taxes paid (refunded) $ 438 $ (116) $ 171