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Acquisitions - Narrative (Details) - USD ($) |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Feb. 01, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Sep. 30, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  | $ 120,000,000 |  | $ 120,000,000 | $ 23,000,000
Goodwill adjustment |  |  |  | 55,000,000 |
Pacific Union |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Cash consideration | $ 116,000,000 |  |  |  |
Goodwill | 40,000,000 |  | $ 40,000,000 |  |
Increase to payables and other liabilities |  |  | 11,000,000 |  |
Increase to fair value of intangible assets |  |  | 2,000,000 |  |
Property and equipment wrote off |  |  | 2,000,000 |  |
Goodwill adjustment |  |  | 11,000,000 |  |
Acquisition costs |  | 0 |  | 4,000,000 |
Revenue since acquisition |  | 95,000,000 |  | 213,000,000 |
Income from acquisition |  | $ 58,000,000 |  | 108,000,000 |
Salaries, Wages and Benefits | Pacific Union |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Acquisition costs |  |  |  | 2,000,000 |
General and Administrative Expense | Pacific Union |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Acquisition costs |  |  |  | $ 2,000,000 |
Originations Segment | Pacific Union |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  |  | 28,000,000 |  |
Servicing Segment | Pacific Union |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  |  | $ 12,000,000 |  |
Minimum | Pacific Union |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Change in contingent consideration | 0 |  |  |  |
Maximum | Pacific Union |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Change in contingent consideration | $ 16,000,000 |  |  |  |

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