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Mortgage Loans Held for Sale - Held For Sale (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
Mortgage loans held for sale - UPB | $ 924 | $ 921 |
Mark-to-market adjustment(1) | 3 | (28) |
Total mortgage loans held for sale | 927 | 893 | $ 4,381
UPB | 42 | 102 |
Fair Value | 36 | 87 |
Ginnie Mae Repurchased Loans |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
UPB | $ 35 | $ 90 |

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- Definition Amount, before valuation allowance, of financing receivable classified as held-for-sale. + References Reference 1: 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 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 948 -SubTopic 310 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481852/948-310-45-1 + Details
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