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MORTGAGE BANKING AND OTHER - Changes Related to MSRs - Fair Value Method (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
MSRs |  |  |  |
Fair value as of beginning of period |  |  | $ 1,029 |
Fair value at end of the period | $ 1,524 |  | 1,524 |
Residential mortgages |  |  |  |
MSRs |  |  |  |
Fair value as of beginning of period | 1,411 | $ 902 | 1,029 | $ 658
Amounts capitalized | 70 | 109 | 244 | 318
Servicing rights acquired | 0 | 0 | 16 | 0
Changes in unpaid principal balance during the period | (31) | (54) | (102) | (159)
Changes in fair value during the period | 74 | 21 | 337 | 161
Fair value at end of the period | $ 1,524 | $ 978 | $ 1,524 | $ 978

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