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Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Income Tax Disclosure [Abstract] |  |  |  |
Earnings (loss) from continuing operations before income taxes | $ (193) | $ 190 | $ (2,980) | $ (88)
Current income tax expense (benefit) | (90) | 2 | (199) | 1
Deferred income tax expense (benefit) |  | 52 | (311) | 2
Total income tax expense (benefit) | $ (90) | $ 54 | $ (510) | $ 3
U.S. statutory income tax rate | 21.00% | 21.00% | 21.00% | 21.00%
State income taxes | 0.00% | 6.00% | 1.00% | (2.00%)
Change in tax legislation | 4.00% | 0.00% | 3.00% | 0.00%
Unrecognized tax benefits | 18.00% | 0.00% | 0.00% | (2.00%)
Other | 0.00% | 1.00% | (1.00%) | (20.00%)
Deferred tax asset valuation allowance | 4.00% | 0.00% | (7.00%) | 0.00%
Effective income tax rate | 47.00% | 28.00% | 17.00% | (3.00%)

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