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MORTGAGE BANKING AND OTHER - Changes Related to MSRs - Fair Value Method (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
MSRs |  |
Fair value as of beginning of period | $ 1,029 |
Fair value at end of the period | 1,241 |
Residential mortgages |  |
MSRs |  |
Fair value as of beginning of period | 1,029 | $ 658
Amounts capitalized | 95 | 87
Changes in unpaid principal balance during the period | (39) | (58)
Changes in fair value during the period | 156 | 206
Fair value at end of the period | $ 1,241 | $ 893

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- Definition Amount of increase (decrease) from changes in fair value classified as other for a contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(4)(ii) -URI http://asc.fasb.org/extlink&oid=125521744&loc=d3e122625-111746 + Details
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