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Income Taxes And Tax-Related Items Reconciliation of Expected Income Tax Expense at the Federal Statutory Rate to the Corporation's Provision for Income Taxes (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Income Tax Disclosure [Abstract] |  |  |
Tax based on federal statutory rate, amount | $ 186 | $ 240 | $ 310
Tax based on federal statutory rate, percent | 21.00% | 21.00% | 21.00%
State income tax, amount | $ 10 | $ 35 | $ 36
State income tax, percent | 1.10% | 3.10% | 2.50%
Affordable housing and historic credits, amount | $ (15) | $ (16) | $ (13)
Affordable housing and historic credits, percent | (1.70%) | (1.40%) | (0.90%)
Bank-owned life insurance, amount | $ (8) | $ (10) | $ (10)
Bank-owned life insurance, percent | (0.90%) | (0.90%) | (0.70%)
FDIC fees, amount | $ 13 | $ 15 | $ 6
FDIC fees, percent | 1.50% | 1.30% | 0.40%
Employee Stock Transactions, amount | $ 1 | $ (1) | $ (3)
Employee Stock Transactions, percent | 0.20% | (0.10%) | (0.20%)
Tax-related interest and penalties, amount | $ 0 | $ (4) | $ 0
Tax-related interest and penalties, percent | 0.00% | (0.40%) | 0.00%
Other, amount | $ 3 | $ 4 | $ (1)
Other, percent | 0.40% | 0.40% | (0.10%)
Provision for income taxes, amount | $ 190 | $ 263 | $ 325
Provision for income taxes, percent | 21.60% | 23.00% | 22.00%

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- Definition The portion of the difference between total income tax expense (benefit) as reported in the Income Statement for the period and the expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to interest on income tax liabilities. + References No definition available. + Details
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