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Mortgage Loans Held for Sale - Mortgage Loans Held for Sale (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
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Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage loans held for sale – UPB | $ 3,607 | $ 4,257
Mark-to-market adjustment(1) | (14) | 124
Total mortgage loans held for sale | 3,593 | 4,381
Mortgage Loans Held for Sale, Nonaccrual Basis Unpaid Principal Balance | 230 | 104
Fair Value, Mortgage Loans Held for Sale non-accrual status | 224 | 94
Ginnie mae repurchased loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Mortgage Loans Held for Sale, Nonaccrual Basis Unpaid Principal Balance | $ 221 | $ 94

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- Definition Amount, after valuation allowance, of financing receivable held for sale and not part of disposal group. Excludes loan covered under loss sharing agreement and loan classified as investment in debt security. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124265262&loc=d3e48678-111004 + Details
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