Income Taxes (Components Of Income Tax (Benefit) Expense) (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
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| Income Taxes [Abstract] | |||
| Income tax expense (benefit) | $ 0 | $ 80 | $ (3) |
| Current Income Tax Expense (Benefit), Continuing Operations [Abstract] | |||
| Current Federal Tax Expense (Benefit) | 279 | 175 | 373 |
| Current State and Local Tax Expense (Benefit) | 62 | 29 | 30 |
| Current Income Tax Expense (Benefit) | 341 | 204 | 403 |
| Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] | |||
| Deferred Federal Income Tax Expense (Benefit) | 29 | 130 | 180 |
| Deferred State and Local Income Tax Expense (Benefit) | 33 | 53 | 36 |
| Deferred income tax expense (benefit) | 62 | 183 | 216 |
| Income tax expense (benefit) | 403 | 387 | 619 |
| Discontinued Operation Deferred Tax Effect Of Discontinued Operation | $ 0 | $ 43 | $ (7) |
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- Definition Discontinued Operation Deferred Tax Effect Of Discontinued Operation No definition available.
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- Definition Income Taxes [Abstract] No definition available.
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- Definition Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of current income tax expense (benefit) pertaining to taxable income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of deferred income tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of tax expense (benefit) related to a discontinued operation. Includes, but is not limited to, tax expense (benefit) related to income (loss) from operations during the phase-out period, tax expense (benefit) related to gain (loss) on disposal, tax expense (benefit) related to gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and tax expense (benefit) related to adjustments of a prior period gain (loss) on disposal. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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