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Loans and Leases - Loan Modifications (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | $ 26 | $ 46
Mortgage Loans: | Multi-family |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | $ 8 | $ 0
Percent of Total Loan class | 0.08% | 0.00%
Mortgage Loans: | Commercial real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | $ 2 | $ 44
Percent of Total Loan class | 0.02% | 0.42%
Mortgage Loans: | One-to-four family first mortgage |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | $ 2 | $ 2
Percent of Total Loan class | 0.03% | 0.03%
Other Loans: | Other |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | $ 1 | $ 0
Percent of Total Loan class | 0.06% | 0.00%
Other Loans: | Commercial and industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | $ 13 | $ 0
Percent of Total Loan class | 0.06% | 0.00%
Interest Rate Reduction |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | $ 10 | $ 44
Interest Rate Reduction | Mortgage Loans: | Multi-family |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | $ 8 | $ 0
Interest Rate Reduction | Mortgage Loans: | Multi-family | Minimum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted-average contractual interest rate | 8.13% | 0.00%
Interest Rate Reduction | Mortgage Loans: | Multi-family | Maximum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted-average contractual interest rate | 6.95% | 0.00%
Interest Rate Reduction | Mortgage Loans: | Commercial real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | $ 2 | $ 44
Interest Rate Reduction | Mortgage Loans: | Commercial real estate | Minimum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted-average contractual interest rate | 8.08% | 10.50%
Interest Rate Reduction | Mortgage Loans: | Commercial real estate | Maximum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted-average contractual interest rate | 6.00% | 4.00%
Interest Rate Reduction | Mortgage Loans: | One-to-four family first mortgage |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | $ 0 | $ 0
Weighted-average Term (in years) | 15 years 3 months 18 days | 12 years 8 months 12 days
Interest Rate Reduction | Mortgage Loans: | One-to-four family first mortgage | Minimum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted-average contractual interest rate | 4.66% | 4.84%
Interest Rate Reduction | Mortgage Loans: | One-to-four family first mortgage | Maximum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted-average contractual interest rate | 3.76% | 3.97%
Interest Rate Reduction | Mortgage Loans: | Commercial and industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted-average Term (in years) | 3 months 18 days |
Interest Rate Reduction | Mortgage Loans: | Commercial and industrial | Minimum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted-average contractual interest rate | 6.78% | 0.00%
Interest Rate Reduction | Mortgage Loans: | Commercial and industrial | Maximum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted-average contractual interest rate | 6.50% | 0.00%
Interest Rate Reduction | Mortgage Loans: | Other Consumer |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted-average Term (in years) | 1 year 9 months 18 days |
Interest Rate Reduction | Mortgage Loans: | Other Consumer | Minimum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted-average contractual interest rate | 11.01% | 0.00%
Interest Rate Reduction | Mortgage Loans: | Other Consumer | Maximum |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Weighted-average contractual interest rate | 4.76% | 0.00%
Interest Rate Reduction | Other Loans: | Other |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | $ 0 | $ 0
Interest Rate Reduction | Other Loans: | Commercial and industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | 0 | 0
Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | 14 | 1
Term Extension | Mortgage Loans: | Multi-family |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | 0 | 0
Term Extension | Mortgage Loans: | Commercial real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | 0 | 0
Term Extension | Mortgage Loans: | One-to-four family first mortgage |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | 1 | 1
Term Extension | Other Loans: | Other |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | 0 | 0
Term Extension | Other Loans: | Commercial and industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | 13 | 0
Combination - Interest Rate Reduction & Term Extension |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | 2 | 1
Combination - Interest Rate Reduction & Term Extension | Mortgage Loans: | Multi-family |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | 0 | 0
Combination - Interest Rate Reduction & Term Extension | Mortgage Loans: | Commercial real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | 0 | 0
Combination - Interest Rate Reduction & Term Extension | Mortgage Loans: | One-to-four family first mortgage |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | 1 | 1
Combination - Interest Rate Reduction & Term Extension | Other Loans: | Other |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | 1 | 0
Combination - Interest Rate Reduction & Term Extension | Other Loans: | Commercial and industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Amortized Cost | $ 0 | $ 0

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