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Mortgage Servicing Rights and Related Liabilities - Narrative (Details) - USD ($) | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2020 | Dec. 31, 2019 | Jun. 30, 2019
Servicing Asset at Amortized Cost [Line Items] |  |  |
UPB | $ 277,975,000,000 | $ 296,782,000,000 |
Forward MSRs Sold |  |  |
Servicing Asset at Amortized Cost [Line Items] |  |  |
UPB | 71,000,000 |  | $ 22,932,000,000
Forward MSRs Sold, Subservicing Retained |  |  |
Servicing Asset at Amortized Cost [Line Items] |  |  |
UPB | 0 |  | $ 20,560,000,000
Reverse Mortgage Servicing Rights |  |  |
Servicing Asset at Amortized Cost [Line Items] |  |  |
Impairment | 0 |  |
Mortgage servicing rights |  |  |
Servicing Asset at Amortized Cost [Line Items] |  |  |
UPB | 277,975,000,000 | 296,782,000,000 |
HECM |  |  |
Servicing Asset at Amortized Cost [Line Items] |  |  |
UPB | $ 20,758,000,000 | $ 22,725,000,000 |

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- Definition This is the sum of principal amount outstanding for both securitized and unsecuritized loans of all types. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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