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Mortgage Loans Held for Sale and Investment - Mortgage Loans Held For Investment - UPB, Fair Value (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Mortgage Loans Held For Investment [Roll Forward] |  |  |
Balance - beginning of period | $ 119 |  |
Changes in fair value | 3 | $ 0 |
Balance - end of period | 114 |  |
Mortgage loans held for investment, net |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |
UPB | 21 |  | $ 27
Fair Value | 10 |  | $ 13
Mortgage Loans Held For Investment [Roll Forward] |  |  |
Balance - beginning of period | 119 |  |
Payments received from borrowers | (8) |  |
Changes in fair value | 3 |  |
Balance - end of period | $ 114 |  |

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- Details
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