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Fair Value Measurements - Level 3 Reconciliation (Details) - Recurring Fair Value Measurements - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2021 | Sep. 30, 2020
Excess spread financing |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance - beginning of period | $ 934 | $ 1,311
Changes in fair value included in earnings | 6 | (132)
Other changes | 0 | 0
Purchases/Additions | 0 | 0
Issuances | 0 | 24
Sales | 0 |
Settlements and repayments | (118) | (159)
Balance - end of period | 822 | 1,044
Mortgage servicing rights financing |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance - beginning of period | 33 | 37
Changes in fair value included in earnings | (13) | 10
Other changes | 0 | 0
Purchases/Additions | 0 | 0
Issuances | 0 | 0
Sales | 0 |
Settlements and repayments | 0 | 0
Balance - end of period | 20 | 47
LPCs |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance - beginning of period | 1 |
Changes in fair value included in earnings | 12 |
Other changes | 0 |
Purchases/Additions | 0 |
Issuances | 0 |
Sales | 0 |
Settlements and repayments | 0 |
Balance - end of period | 13 |
Forward mortgage servicing rights |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance - beginning of period | 2,703 | 3,496
Changes in fair value included in earnings | (296) | (1,332)
Other changes | 44 | 57
Purchases/Additions | 438 | 30
Issuances | 790 | 412
Sales | (13) |
Settlements and repayments | 0 | 0
Balance - end of period | 3,666 | 2,663
Equity securities |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance - beginning of period | 0 |
Changes in fair value included in earnings | 0 |
Other changes | 0 |
Purchases/Additions | 50 |
Issuances | 0 |
Sales | 0 |
Settlements and repayments | 0 |
Balance - end of period | 50 |
IRLCs |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance - beginning of period | 414 | 135
Changes in fair value included in earnings | (247) | 279
Other changes | 0 | 0
Purchases/Additions | 0 | 0
Issuances | 0 | 0
Sales | 0 |
Settlements and repayments | 0 | 0
Balance - end of period | 167 | 414
LPCs |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance - beginning of period | 38 | 12
Changes in fair value included in earnings | (32) | 26
Other changes | 0 | 0
Purchases/Additions | 0 | 0
Issuances | 0 | 0
Sales | 0 |
Settlements and repayments | 0 | 0
Balance - end of period | $ 6 | $ 38

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