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Loans and Leases - Loan Modification Subsequently Defaulted (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total | $ 16 | $ 6 | $ 18 | $ 11
Term Extension |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total | 12 | 5 | 13 | 9
Principal Forgiveness |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total | 0 | 0 | 0 | 0
Combination - Interest Rate Reduction and Term/Payment Extension/Delay |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total | 4 | 1 | 5 | 2
Loans and leases held for investment: | Commercial real estate |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total | 6 |  | 6 | 4
Loans and leases held for investment: | Commercial real estate | Term Extension |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total | 6 |  | 6 | 4
Loans and leases held for investment: | Commercial real estate | Principal Forgiveness |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total | 0 |  | 0 | 0
Loans and leases held for investment: | Commercial real estate | Combination - Interest Rate Reduction and Term/Payment Extension/Delay |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total | 0 |  | 0 | 0
Loans and leases held for investment: | One-to-four family first mortgage |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total | 10 | 2 | 12 | 1
Loans and leases held for investment: | One-to-four family first mortgage | Term Extension |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total | 6 | 1 | 7 | 1
Loans and leases held for investment: | One-to-four family first mortgage | Principal Forgiveness |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total | 0 | 0 | 0 | 0
Loans and leases held for investment: | One-to-four family first mortgage | Combination - Interest Rate Reduction and Term/Payment Extension/Delay |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total | $ 4 | 1 | $ 5 | 0
Loans and leases held for investment: | Commercial and Industrial |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total |  | 4 |  | 5
Loans and leases held for investment: | Commercial and Industrial | Term Extension |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total |  | 4 |  | 4
Loans and leases held for investment: | Commercial and Industrial | Principal Forgiveness |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total |  | 0 |  | 0
Loans and leases held for investment: | Commercial and Industrial | Combination - Interest Rate Reduction and Term/Payment Extension/Delay |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total |  | $ 0 |  | 1
Loans and leases held for investment: | Other |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total |  |  |  | 1
Loans and leases held for investment: | Other | Term Extension |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total |  |  |  | 0
Loans and leases held for investment: | Other | Principal Forgiveness |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total |  |  |  | 0
Loans and leases held for investment: | Other | Combination - Interest Rate Reduction and Term/Payment Extension/Delay |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Total |  |  |  | $ 1

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