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Accounts Receivable (Schedule Of Accounts Receivable) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Receivables [Abstract] |  |
Trade customers | $ 1,086 | $ 948
Related Party | 9 | 12
Allowance for doubtful accounts | (17) | (22)
Accounts Receivable from trade customers, net | 1,078 | 938
Federal and state taxes | 92 | 59
Other | 44 | 39
Accounts receivable, net | $ 1,214 | $ 1,036

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