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Loan Sale and Servicing Activities and Variable Interest Entities (Loan Sale and Servicing Activities and Variable Interest Entities) (Narrative) (Details) - Low Income Housing Tax Credit And Market Tax Credit - USD ($) $ in Billions | 9 Months Ended
--- | ---
Sep. 30, 2025 | Sep. 30, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Amortization recognized | $ 0.4 | $ 0.4
Tax credits | 0.4 | 0.4
Other tax benefits | $ 0.1 | $ 0.1

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