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Income Taxes (Summary Of Significant Components Of Deferred Tax Assets And Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Deferred Tax Assets [Abstract] |  |
Unrealized losses included in shareholders' equity | $ 976 | $ 961
Allowance for loan losses | 433 | 430
Deferred tax asset, right of use liability | 123 | 129
Accrued expenses | 48 | 87
Other | 18 | 20
Deferred Tax Assets, Tax Credit Carryforwards | 27 | 0
State net operating carryforwards, net of federal tax effect | 28 | 31
Total deferred tax assets | 1,653 | 1,658
Deferred Tax Assets, Valuation Allowance | (22) | (21)
Deferred Tax Assets, Net of Valuation Allowance | 1,631 | 1,637
Deferred Tax Liabilities [Abstract] |  |
Lease financing | 413 | 439
Deferred Tax Liabilities, Right of use asset | 116 | 121
Mortgage servicing rights | 96 | 95
Goodwill and intangibles | 126 | 112
Fixed assets | 7 | 30
Employee benefits and deferred compensation | 34 | 37
Other | 64 | 62
Total deferred tax liabilities | 856 | 896
Deferred Tax Assets, Net | 775 | $ 741
Tax Credit Carryforward, Name [Domain] |  |
Deferred Tax Assets [Abstract] |  |
Deferred Tax Assets, Net of Valuation Allowance | 27 |
Total Net Operating Losses [Member] |  |
Deferred Tax Assets [Abstract] |  |
Deferred Tax Assets, Net of Valuation Allowance | $ 35 |

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