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Reverse Mortgage Interests, Net - Results (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Jul. 31, 2018
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Participating interests in HECM mortgage-backed securities, including $10 and $58 purchase premium, respectively | $ 4,292 | $ 5,664 |
Other interests securitized, net of $56 and $100 purchase discount, respectively | 938 | 1,064 |
Unsecuritized interests, net of $68 and $122 purchase discount, respectively | 1,052 | 1,219 |
Reserves | (3) | (13) |
Total reverse mortgage interests, net | 6,279 | 7,934 |
Other interests securitized, purchase discounts | 56 | 100 | $ 117
Unsecuritized interests, purchase discount | 68 | 122 | $ 173
Mortgage-backed debt |  |  |
Debt Instrument [Line Items] |  |  |
Unamortized premium | $ 10 | $ 58 |

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- Definition Reverse Funded Loan Advances, Reserves + References No definition available. + Details
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- Definition Reverse Mortgage Interest Subject to Non-Recourse Debt + References No definition available. + Details
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- Definition Reverse Mortgage Interest, Unpaid Principal Balance, Other Interests Securitized + References No definition available. + Details
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- Definition Reverse Mortgage Interest, Unpaid Principal Balance, Other Interests Securitized, Purchase Discount + References No definition available. + Details
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- Definition Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized + References No definition available. + Details
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- Definition Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Purchase Discount + References No definition available. + 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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- Definition Amount, after accumulated amortization, of debt premium. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28541-108399 + Details
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- Details
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