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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
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Changes in assets and liabilities, net: |  |  |
Accounts receivable | $ 191 | $ (142) | $ (526)
Other current assets | 95 | (119) | 30
Other long-term assets | (36) | 90 | 12
Accounts payable and revenues and royalties payable | (335) | 152 | 539
Other current liabilities | (50) | (97) | (18)
Other long-term liabilities | (9) | (110) | (153)
Total | (144) | (226) | (116)
Supplementary cash flow data - total operations: |  |  |
Interest paid | 378 | 370 | 404
Income taxes paid (refunded) | $ 400 | $ 438 | $ (116)

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