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Supplemental Information To Statements Of Cash Flows (Schedule Of Supplemental Information To Statements Of Cash Flows) (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Changes in assets and liabilities, net: |  |
Accounts receivable | $ 150 | $ (457)
Other current assets | 16 | 64
Other long-term assets | 31 | 66
Accounts payable and revenues and royalties payable | (165) | 247
Other current liabilities | (3) | 8
Other long-term liabilities | (17) | (71)
Total | 12 | (143)
Supplementary cash flow data: |  |
Interest paid | 101 | 100
Income taxes refunded | $ 0 | $ (23)

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