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Loans and Leases - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
LGG loans | $ 541 |
LGG loans, repurchase liability | 456 |
LGG loans, repossessed assets | 14 |
Loans held-for-sale | 1,182 | $ 1,115
Loans reclassified to held-for-sale | 360 |
Loans 90 days or greater past due and still accruing | 0 | 0
Residential mortgage loans in process of foreclosure | 81 | 121
Loans held for investment | 83,627 | 68,608
Loans modified | 262 | $ 44
Term Extension |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans modified | 25 |
Combination - Interest Rate Reduction & Term Extension |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans modified | 10 |
One-to-four family first mortgage | Term Extension |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans modified that subsequently defaulted | 4 |
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 | 4 |
Mortgage Loans | One-to-four family first mortgage |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans modified | 14 |
Mortgage Loans | One-to-four family first mortgage | Term Extension |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans modified | 5 |
Mortgage Loans | One-to-four family first mortgage | Combination - Interest Rate Reduction & Term Extension |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans modified | $ 6 |

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- Definition Amortized cost excluding accrued interest, of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 16 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-16 + Details
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