Income Taxes (Income Tax Rate Reconciliation) (Details) - USD ($) $ in Millions |
12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|||||
| Income Taxes [Abstract] | |||||||
| Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate | $ 276 | $ 417 | $ 410 | ||||
| Income tax expense | [1],[2] | $ 220 | $ 403 | $ 387 | |||
| Effective Income Tax Rate, Continuing Operations | 16.80% | 20.30% | 19.80% | ||||
| Increase (decrease) in taxes resulting from: [Abstract] | |||||||
| State income tax, net of federal tax effect | $ 39 | $ 75 | $ 65 | ||||
| Tax-exempt interest | (34) | (39) | (37) | ||||
| Affordable housing investment amortization, net of tax benefits (excluding Tax Reform) | (31) | (34) | (37) | ||||
| Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | 0 | 0 | (37) | ||||
| Non-deductible expenses | 22 | 19 | 28 | ||||
| Bank-owned life insurance | (22) | (19) | (16) | ||||
| Unrecognized Tax Benefits that Would Impact Effective Tax Rate | (20) | 20 | 0 | ||||
| Lease financing | 5 | 5 | 11 | ||||
| Other, net | $ (15) | $ (41) | $ 0 | ||||
| |||||||
| X | ||||||||||
- Definition Effective Income Tax Rate Reconciliation, Bank-Owned Life Insurance, Amount No definition available.
|
| X | ||||||||||
- Definition Impact of change in unrecognized tax benefits No definition available.
|
| X | ||||||||||
- Definition Income Taxes [Abstract] No definition available.
|
| X | ||||||||||
- Definition Increase (decrease) in taxes resulting from: [Abstract] No definition available.
|
| X | ||||||||||
- Definition Percentage 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
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible lease expense. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax credits. Including, but not limited to, research credit, foreign tax credit, investment tax credit, and other tax credits. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income (loss) exempt from income taxes. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|