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Fair Value Measurements - Level 3 Reconciliation (Details) - USD ($) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Mortgage loans held for investment subject to nonrecourse debt legacy assets net | $ 0 |  | $ 0
Derivative financial instruments | 391,000,000 |  | 153,000,000
Recurring Fair Value Measurements |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Derivative financial instruments | 391,000,000 |  | 153,000,000
LPCs | Recurring Fair Value Measurements |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Derivative financial instruments | 18,000,000 |  | 12,000,000
Derivative financial instruments | 1,000,000 |  | 3,000,000
Excess spread financing | Recurring Fair Value Measurements |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance - beginning of period | 1,311,000,000 | $ 1,184,000,000 |
Total gains or losses included in earnings | (101,000,000) | (74,000,000) |
Purchases | 0 | 0 |
Issuances | 24,000,000 | 438,000,000 |
Sales |  | 0 |
Settlements and repayments | (110,000,000) | (119,000,000) |
Balance - end of period | 1,124,000,000 | 1,429,000,000 |
Liabilities | Recurring Fair Value Measurements |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance - beginning of period | 37,000,000 | 32,000,000 |
Total gains or losses included in earnings | 12,000,000 | 11,000,000 |
Purchases | 0 | 0 |
Issuances | 0 | 0 |
Sales |  | 0 |
Settlements and repayments | 0 | 0 |
Balance - end of period | 49,000,000 | 43,000,000 |
Mortgage servicing rights | Recurring Fair Value Measurements |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance - beginning of period | 3,496,000,000 | 3,665,000,000 |
Total gains or losses included in earnings | (1,012,000,000) | (724,000,000) |
Purchases | 24,000,000 | 689,000,000 |
Issuances | 249,000,000 | 169,000,000 |
Sales |  | (294,000,000) |
Settlements and repayments | 0 | 0 |
Balance - end of period | 2,757,000,000 | $ 3,505,000,000 |
IRLCs | Recurring Fair Value Measurements |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Balance - beginning of period | 135,000,000 |  |
Total gains or losses included in earnings | 235,000,000 |  |
Purchases | 0 |  |
Issuances | 0 |  |
Settlements and repayments | 0 |  |
Balance - end of period | 370,000,000 |  |
LPCs | Recurring Fair Value Measurements |  |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |
Derivative financial instruments | $ 18,000,000 |  | $ 12,000,000

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