Summary of Significant Accounting Policies - Loans and Allowance for Credit Losses (Details)	12 Months Ended
	Dec. 31, 2023
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan origination fees and direct loan origination costs amortization period	12 months
Threshold period past due for delinquency status of financing receivables	30 days
Credit Card:
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan origination fees and direct loan origination costs amortization period	12 months
Threshold period past due for write-off of trade accounts receivable	180 days
Credit Card: | Privileges Revoked
Financing Receivable, Allowance for Credit Loss [Line Items]
Threshold period past due for write-off of trade accounts receivable	120 days
Credit Card: | Notification of Death
Financing Receivable, Allowance for Credit Loss [Line Items]
Threshold period past due for write-off of trade accounts receivable	5 days
Credit Card: | Chapter Seven Bankruptcy
Financing Receivable, Allowance for Credit Loss [Line Items]
Threshold period past due for write-off of trade accounts receivable	30 days
Consumer Banking:
Financing Receivable, Allowance for Credit Loss [Line Items]
Threshold period past due for nonperforming status of financing receivables	90 days
Consumer Banking: | Notification of Death
Financing Receivable, Allowance for Credit Loss [Line Items]
Threshold period past due for nonperforming status of financing receivables	60 days
Consumer Banking: | Chapter Seven Bankruptcy
Financing Receivable, Allowance for Credit Loss [Line Items]
Threshold period past due for nonperforming status of financing receivables	60 days
Consumer Banking: | Auto
Financing Receivable, Allowance for Credit Loss [Line Items]
Threshold period past due for nonperforming status of financing receivables	120 days
Consumer Banking: | Small Business Banking Loans | Maximum
Financing Receivable, Allowance for Credit Loss [Line Items]
Threshold period past due for nonperforming status of financing receivables	120 days
Consumer Banking: | Other Consumer Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Threshold period past due for nonperforming status of financing receivables	40 days