v3.25.2
Loans, Leases and Allowance for Credit Losses - Summary of Recorded Investment in Nonaccrual Loans and Loans Past Due 90 Days Still Accruing Interest by Loan Class (Detail) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Financing Receivable, Nonaccrual [Line Items]    
Nonaccrual with No Allowance for Credit Loss $ 92.0 $ 247.0
Nonaccrual with an Allowance for Credit Loss 335.0 229.0
Total Nonaccrual 427.0 476.0
Loans Past Due 90 Days or More and Still Accruing 377.0 326.0
Municipal & nonprofit    
Financing Receivable, Nonaccrual [Line Items]    
Nonaccrual with No Allowance for Credit Loss 0.0 0.0
Nonaccrual with an Allowance for Credit Loss 5.0 5.0
Total Nonaccrual 5.0 5.0
Loans Past Due 90 Days or More and Still Accruing 0.0 0.0
Tech & innovation    
Financing Receivable, Nonaccrual [Line Items]    
Nonaccrual with No Allowance for Credit Loss 0.0 3.0
Nonaccrual with an Allowance for Credit Loss 34.0 57.0
Total Nonaccrual 34.0 60.0
Loans Past Due 90 Days or More and Still Accruing 0.0 0.0
Equity fund resources    
Financing Receivable, Nonaccrual [Line Items]    
Nonaccrual with No Allowance for Credit Loss 0.0 0.0
Nonaccrual with an Allowance for Credit Loss 1.0 1.0
Total Nonaccrual 1.0 1.0
Loans Past Due 90 Days or More and Still Accruing 0.0 0.0
Other commercial and industrial    
Financing Receivable, Nonaccrual [Line Items]    
Nonaccrual with No Allowance for Credit Loss 13.0 11.0
Nonaccrual with an Allowance for Credit Loss 29.0 6.0
Total Nonaccrual 42.0 17.0
Loans Past Due 90 Days or More and Still Accruing 0.0 0.0
CRE - owner occupied    
Financing Receivable, Nonaccrual [Line Items]    
Nonaccrual with No Allowance for Credit Loss 3.0 5.0
Nonaccrual with an Allowance for Credit Loss 0.0 0.0
Total Nonaccrual 3.0 5.0
Loans Past Due 90 Days or More and Still Accruing 0.0 0.0
Other CRE - non-owner occupied    
Financing Receivable, Nonaccrual [Line Items]    
Nonaccrual with No Allowance for Credit Loss 1.0 172.0
Nonaccrual with an Allowance for Credit Loss 180.0 71.0
Total Nonaccrual 181.0 243.0
Loans Past Due 90 Days or More and Still Accruing 0.0 0.0
Residential    
Financing Receivable, Nonaccrual [Line Items]    
Nonaccrual with No Allowance for Credit Loss 0.0 0.0
Nonaccrual with an Allowance for Credit Loss 17.0 88.0
Total Nonaccrual 17.0 88.0
Loans Past Due 90 Days or More and Still Accruing 51.0 0.0
Residential EBO    
Financing Receivable, Nonaccrual [Line Items]    
Nonaccrual with No Allowance for Credit Loss 0.0 0.0
Nonaccrual with an Allowance for Credit Loss 0.0 0.0
Total Nonaccrual 0.0 0.0
Loans Past Due 90 Days or More and Still Accruing 326.0 326.0
Construction and land development    
Financing Receivable, Nonaccrual [Line Items]    
Nonaccrual with No Allowance for Credit Loss 73.0 55.0
Nonaccrual with an Allowance for Credit Loss 69.0 1.0
Total Nonaccrual 142.0 56.0
Loans Past Due 90 Days or More and Still Accruing 0.0 0.0
Other    
Financing Receivable, Nonaccrual [Line Items]    
Nonaccrual with No Allowance for Credit Loss 2.0 1.0
Nonaccrual with an Allowance for Credit Loss 0.0 0.0
Total Nonaccrual 2.0 1.0
Loans Past Due 90 Days or More and Still Accruing $ 0.0 $ 0.0