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Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Income Tax Disclosure [Abstract]    
Loss from continuing operations before income taxes $ (2,107) $ (497)
Current income tax benefit (106) (4)
Deferred income tax benefit (311) (115)
Total income tax benefit $ (417) $ (119)
U.S. statutory income tax rate 21.00% 21.00%
State income taxes 1.00% 6.00%
Change in tax legislation 5.00% 0.00%
Other (3.00%) (3.00%)
Deferred tax asset valuation allowance (4.00%) 0.00%
Effective income tax rate 20.00% 24.00%