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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, 2024
Dec. 31, 2023
Dec. 31, 2022
Changes in assets and liabilities, net:      
Accounts receivable $ (170) $ 191 $ (142)
Other current assets (46) 95 (119)
Other long-term assets 12 (36) 90
Accounts payable and revenues and royalties payable (32) (335) 152
Other current liabilities 26 (50) (97)
Other long-term liabilities (7) (9) (110)
Total (217) (144) (226)
Supplementary cash flow data:      
Interest paid 366 378 370
Income taxes paid $ 480 $ 400 $ 438