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Fair Value Measurements - Reconciliation of Level 3 (Details) - Recurring Fair Value Measurements - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Excess spread financing |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance - beginning of year | $ 509 | $ 768
Changes in fair value included in earnings | 8 | 133
Purchases/additions(1) | 0 | 0
Issuances | 0 | 0
Sales/dispositions(1) | 0 | 0
Repayments | (9) | (293)
Settlements | (71) | (99)
Other changes | 0 | 0
Balance - end of year | 437 | 509
Mortgage servicing rights financing |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance - beginning of year | 19 | 10
Changes in fair value included in earnings | 10 | 9
Purchases/additions(1) | 0 | 0
Issuances | 0 | 0
Sales/dispositions(1) | 0 | 0
Repayments | 0 | 0
Settlements | 0 | 0
Other changes | 0 | 0
Balance - end of year | 29 | 19
Mortgage servicing rights |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance - beginning of year | 6,654 | 4,223
Changes in fair value included in earnings | (483) | 549
Purchases/additions(1) | 3,189 | 1,595
Issuances | 273 | 554
Sales/dispositions(1) | (573) | (294)
Repayments | 0 | 0
Settlements | 0 | 0
Other changes | 30 | (27)
Balance - end of year | 9,090 | 6,654
Mortgage loans held for sale |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance - beginning of year | 74 | 76
Changes in fair value included in earnings | 18 | (3)
Purchases/additions(1) | 180 | 130
Issuances | 0 | 0
Sales/dispositions(1) | (189) | (124)
Repayments | (6) | (2)
Settlements | 0 | 0
Other changes | 4 | (3)
Balance - end of year | 81 | 74
Equity investments |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance - beginning of year | 45 | 54
Changes in fair value included in earnings | (37) | (9)
Purchases/additions(1) | 0 | 0
Issuances | 0 | 0
Sales/dispositions(1) | 0 | 0
Repayments | 0 | 0
Settlements | 0 | 0
Other changes | 0 | 0
Balance - end of year | 8 | 45
IRLCs |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Balance - beginning of year | 22 | 134
Changes in fair value included in earnings | (1) | (112)
Purchases/additions(1) | 0 | 0
Issuances | 0 | 0
Sales/dispositions(1) | 0 | 0
Repayments | 0 | 0
Settlements | 0 | 0
Other changes | 0 | 0
Balance - end of year | $ 21 | $ 22

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