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Reverse Mortgage Interests, Net - Schedule of Reverse Mortgage Interest (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018
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Reverse Mortgage Interests [Abstract] |  |  |  |  |  |
Participating interests in HECM mortgage-backed securities (“HMBS”) | $ 3,873 |  | $ 4,282 |  |  |
Other interests securitized | 825 |  | 994 |  |  |
Unsecuritized interests | 1,138 |  | 1,117 |  |  |
Purchase discount, net | (127) | $ (129) | (114) | $ (163) | $ (171) | $ (164)
Total reverse mortgage interests, net | $ 5,709 |  | $ 6,279 |  |  |

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- Definition Reverse funded loan advances + 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, Purchase Discount, Net + 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 Interests [Abstract] + References No definition available. + Details
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