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Loans and Allowances for Credit Losses, Modifications (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2023 USD ($)
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Financing Receivable, Modified in Period, Amount | $ 130.0
Number of Days Past Due Following Modification to be Considered a Payment Default | 30 days
General business member | Commercial [Member] |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Financing Receivable, Modified in Period, Amount | $ 67.0
Healthcare [Member] | Commercial [Member] |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Financing Receivable, Modified in Period, Amount | 47.0
Healthcare and General business member | Commercial [Member] | Extended Maturity |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Financing Receivable, Modified in Period, Amount | 93.0
Healthcare and Loans to individuals member | Commercial Portfolio Segment and Loans to individuals Portfolio Segment | Extended Maturity and Interest Rate Reduction |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Financing Receivable, Modified in Period, Amount | 36.0
US Government Agency Insured Loans | Residential mortgage [Member] | Loans to individuals [Member] |
Financing Receivable, Troubled Debt Restructuring [Line Items] |
Financing Receivable, Modified in Period, Amount | 13.0
Financing Receivable, Modified, Subsequent Default | $ 4.8

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