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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, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Changes in assets and liabilities, net: |  |  |
Accounts receivable | $ 231 | $ (3) | $ (69)
Other current assets | (97) | (7) | (152)
Other long-term assets | (9) | 17 | (7)
Accounts payable | (38) | (54) | (3)
Revenues and royalties payable | (71) | 8 | 106
Other current liabilities | (68) | (66) | 3
Other long-term liabilities | (43) | 23 | (36)
Total | (95) | (82) | (158)
Supplementary cash flow data - total operations: |  |  |
Interest paid | 259 | 308 | 385
Income taxes paid | $ 171 | $ 6 | $ 40

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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121583591&loc=d3e4297-108586 + Details
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