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Mortgage Loans Held for Sale and Investment - Reconciliation to Cash Flow (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
Loans Receivable Held-for-sale, Net, Reconciliation to Cash Flow [Roll Forward] |  |
Balance - beginning of period | $ 1,631 |
Mortgage loans originated and purchased, net of fees | 6,252 |
Loans sold | (6,088) |
Repurchase of loans out of Ginnie Mae securitizations | 364 |
Transfer of mortgage loans held for sale to advances/accounts receivable, net related to claims | (3) |
Net transfer of mortgage loans held for sale from REO in other assets | 3 |
Changes in fair value | 10 |
Other purchase-related activities | 1 |
Balance - end of period | $ 2,170 |
Predecessor |  |
Loans Receivable Held-for-sale, Net, Reconciliation to Cash Flow [Roll Forward] |  |
Balance - beginning of period |  | $ 1,891
Mortgage loans originated and purchased, net of fees |  | 5,088
Loans sold |  | (5,649)
Repurchase of loans out of Ginnie Mae securitizations |  | 251
Transfer of mortgage loans held for sale to advances/accounts receivable, net related to claims |  | (3)
Net transfer of mortgage loans held for sale from REO in other assets |  | 8
Changes in fair value |  | (5)
Other purchase-related activities |  | 8
Balance - end of period |  | $ 1,589

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- Definition Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Changes in Fair Value + References No definition available. + Details
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- Definition Loans Receivable Held-for-sale, Reconciliation to Cash Flow, Transfer from Held-for-sale to Held For Investment or Other Assets + References No definition available. + Details
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- Definition Repurchase of Ginnie Mae Receivables + References No definition available. + Details
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- Definition The face amount of loans that will be sold to other entities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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- Definition Amount, after allowance for bad debt, of additions to loan receivables held-for-sale that are not part of a disposal group. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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- Definition Amount, after allowance for bad debt, of deductions to loan receivables held-for-sale that are not part of a disposal group. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
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