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Loans and Leases - Loan Modifications (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | $ 34 | $ 262
Loans held for investment | Multi-family |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | $ 2 | $ 122
Percent of Total Loan class | 0.01% | 1.17%
Loans held for investment | Commercial real estate |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | $ 12 | $ 103
Percent of Total Loan class | 0.14% | 0.98%
Loans held for investment | One-to-four family first mortgage |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | $ 16 | $ 14
Percent of Total Loan class | 0.29% | 0.23%
Other loans held for investment | Commercial and industrial |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | $ 4 | $ 21
Percent of Total Loan class | 0.03% | 0.08%
Other loans held for investment | Other Consumer |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost |  | $ 2
Percent of Total Loan class |  | 0.08%
Interest Rate Reduction |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | $ 10 | $ 227
Interest Rate Reduction | Loans held for investment | Multi-family |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | $ 2 | $ 122
Interest Rate Reduction | Loans held for investment | Multi-family | Minimum |  |
Financing Receivable, Modified [Line Items] |  |
Weighted-average contractual interest rate | 8.08% | 7.45%
Interest Rate Reduction | Loans held for investment | Multi-family | Maximum |  |
Financing Receivable, Modified [Line Items] |  |
Weighted-average contractual interest rate | 6.00% | 6.02%
Interest Rate Reduction | Loans held for investment | Commercial real estate |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | $ 8 | $ 102
Weighted-average Term (in years) | 3 months |
Interest Rate Reduction | Loans held for investment | Commercial real estate | Minimum |  |
Financing Receivable, Modified [Line Items] |  |
Weighted-average contractual interest rate | 8.13% | 8.83%
Interest Rate Reduction | Loans held for investment | Commercial real estate | Maximum |  |
Financing Receivable, Modified [Line Items] |  |
Weighted-average contractual interest rate | 6.95% | 4.56%
Interest Rate Reduction | Loans held for investment | One-to-four family first mortgage |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | $ 0 | $ 3
Weighted-average Term (in years) | 11 years 3 months 7 days |
Interest Rate Reduction | Loans held for investment | One-to-four family first mortgage | Minimum |  |
Financing Receivable, Modified [Line Items] |  |
Weighted-average contractual interest rate | 4.73% | 6.08%
Interest Rate Reduction | Loans held for investment | One-to-four family first mortgage | Maximum |  |
Financing Receivable, Modified [Line Items] |  |
Weighted-average contractual interest rate | 3.80% | 4.79%
Interest Rate Reduction | Loans held for investment | Commercial and industrial |  |
Financing Receivable, Modified [Line Items] |  |
Weighted-average Term (in years) | 8 months 12 days | 6 months 29 days
Interest Rate Reduction | Loans held for investment | Commercial and industrial | Minimum |  |
Financing Receivable, Modified [Line Items] |  |
Weighted-average contractual interest rate | 7.73% | 8.44%
Interest Rate Reduction | Loans held for investment | Commercial and industrial | Maximum |  |
Financing Receivable, Modified [Line Items] |  |
Weighted-average contractual interest rate | 6.10% | 8.08%
Interest Rate Reduction | Loans held for investment | Other Consumer |  |
Financing Receivable, Modified [Line Items] |  |
Weighted-average Term (in years) | 2 years 1 month 6 days |
Interest Rate Reduction | Loans held for investment | Other Consumer | Minimum |  |
Financing Receivable, Modified [Line Items] |  |
Weighted-average contractual interest rate | 10.69% | 9.09%
Interest Rate Reduction | Loans held for investment | Other Consumer | Maximum |  |
Financing Receivable, Modified [Line Items] |  |
Weighted-average contractual interest rate | 3.71% | 4.82%
Interest Rate Reduction | Other loans held for investment | Commercial and industrial |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | $ 0 | $ 0
Interest Rate Reduction | Other loans held for investment | Other Consumer |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost |  | 0
Term Extension |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | 15 | 25
Term Extension | Loans held for investment | Multi-family |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | 0 | 0
Term Extension | Loans held for investment | Commercial real estate |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | 4 | 1
Term Extension | Loans held for investment | One-to-four family first mortgage |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | 7 | 5
Term Extension | Other loans held for investment | Commercial and industrial |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | 4 | 19
Term Extension | Other loans held for investment | Other Consumer |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost |  | 0
Combination - Interest Rate Reduction & Term Extension |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | 8 | 10
Combination - Interest Rate Reduction & Term Extension | Loans held for investment | Multi-family |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | 0 | 0
Combination - Interest Rate Reduction & Term Extension | Loans held for investment | Commercial real estate |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | 0 | 0
Combination - Interest Rate Reduction & Term Extension | Loans held for investment | One-to-four family first mortgage |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | 8 | 6
Combination - Interest Rate Reduction & Term Extension | Other loans held for investment | Commercial and industrial |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | 0 | 2
Combination - Interest Rate Reduction & Term Extension | Other loans held for investment | Other Consumer |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost |  | 2
Principal Forgiveness |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | 1 | 0
Principal Forgiveness | Loans held for investment | Multi-family |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | 0 | 0
Principal Forgiveness | Loans held for investment | Commercial real estate |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | 0 | 0
Principal Forgiveness | Loans held for investment | One-to-four family first mortgage |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | 1 | 0
Principal Forgiveness | Other loans held for investment | Commercial and industrial |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost | $ 0 | 0
Principal Forgiveness | Other loans held for investment | Other Consumer |  |
Financing Receivable, Modified [Line Items] |  |
Amortized Cost |  | $ 0

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