Annual report [Section 13 and 15(d), not S-K Item 405]

Summary of Significant Accounting Principles - Securities, Loans and Leases and Allowance for Credit Losses (Details)

v3.25.0.1
Summary of Significant Accounting Principles - Securities, Loans and Leases and Allowance for Credit Losses (Details)
 12 Months Ended
Dec. 31, 2024
portfolioSegment
Financing Receivable, Past Due [Line Items]  
Minimum percentage of principal collected and disposed to be treated as matured 85.00%
Number of portfolio segments 3
Threshold period of collateral-dependent troubled debt restructurings 180 days
Consumer real estate  
Financing Receivable, Past Due [Line Items]  
Threshold period past due for nonperforming status of financing receivables 180 days
Consumer real estate | Death, Bankruptcy or Fraud  
Financing Receivable, Past Due [Line Items]  
Threshold period past due for nonperforming status of financing receivables 60 days
Consumer real estate | Residential Mortgage  
Financing Receivable, Past Due [Line Items]  
Threshold period past due for nonperforming status of financing receivables 90 days
Consumer real estate | Junior Lien Home Equity Financing Receivable  
Financing Receivable, Past Due [Line Items]  
Threshold period past due for nonperforming status of financing receivables 90 days
Consumer real estate | Credit Card and Other Unsecured Consumer Loans  
Financing Receivable, Past Due [Line Items]  
Threshold period past due for nonperforming status of financing receivables 180 days
Consumer Portfolio Segment  
Financing Receivable, Past Due [Line Items]  
Threshold period past due for nonperforming status of financing receivables 90 days
Threshold period past due for write-off of financing receivable 120 days
Consumer Portfolio Segment | Chapter Seven Bankruptcy  
Financing Receivable, Past Due [Line Items]  
Threshold period past due for write-off of financing receivable 60 days
Consumer Portfolio Segment | Credit Card and Other Unsecured Consumer Loans | Death, Bankruptcy or Fraud  
Financing Receivable, Past Due [Line Items]  
Threshold period past due for write-off of financing receivable 60 days
Consumer Portfolio Segment | Consumer Vehicle Loans  
Financing Receivable, Past Due [Line Items]  
Threshold period past due for write-off of financing receivable 90 days
Consumer Portfolio Segment | Consumer Vehicle Loans | Death, Bankruptcy or Fraud  
Financing Receivable, Past Due [Line Items]  
Threshold period past due for write-off of financing receivable 60 days
Commercial  
Financing Receivable, Past Due [Line Items]  
Threshold period past due for nonperforming status of financing receivables 90 days