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Loans and Leases - Narrative (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans held for sale, at fair value | $ 1,851 |  | $ 1,182
LGG loans | $ 386 |  |
Payment performance period threshold | 6 months |  |
Loans 90 days or greater past due and still accruing | $ 0 |  | 0
Residential mortgage loans in process of foreclosure | 57 |  | $ 81
Term Extension |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans modified that subsequently defaulted | 8 |  |
Combination - Interest Rate Reduction & Term Extension |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans modified that subsequently defaulted | 1 |  |
One-to-four family first mortgage | Term Extension |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans modified that subsequently defaulted |  | $ 3 |
One-to-four family first mortgage | Combination - Interest Rate Reduction & Term Extension |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans modified that subsequently defaulted |  | $ 5 |
Loans and Leases Held for Investment: | One-to-four family first mortgage | Term Extension |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans modified that subsequently defaulted | 0 |  |
Loans and Leases Held for Investment: | One-to-four family first mortgage | Combination - Interest Rate Reduction & Term Extension |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Loans modified that subsequently defaulted | $ 1 |  |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 20 -Name Accounting Standards Codification -Section 40 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481628/310-20-40-7 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-2 + Details
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