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Fair Value Measurements - Measured on a Recurring Basis (Details) - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Assets |  |
Mortgage loans held for sale | $ 2,072 | $ 4,381
Liabilities |  |
Mortgage servicing rights financing | 24 | 10
Recurring Fair Value Measurements |  |
Assets |  |
Mortgage loans held for sale | 2,072 | 4,381
Mortgage servicing rights | 6,151 | 4,223
Equity securities | 59 | 63
Liabilities |  |
Mortgage servicing rights financing | 24 | 10
Excess spread financing | 532 | 768
Recurring Fair Value Measurements | IRLCs |  |
Assets |  |
Derivative financial instruments | 62 | 134
Liabilities |  |
Fair Value | 1 |
Recurring Fair Value Measurements | LPCs |  |
Assets |  |
Derivative financial instruments | 3 | 3
Liabilities |  |
Fair Value | 1 | 2
Recurring Fair Value Measurements | Forward MBS trades |  |
Assets |  |
Derivative financial instruments | 12 | 7
Liabilities |  |
Fair Value | 13 | 8
Recurring Fair Value Measurements | Swap futures |  |
Liabilities |  |
Fair Value |  | 6
Recurring Fair Value Measurements | Treasury futures |  |
Liabilities |  |
Fair Value | 18 |
Recurring Fair Value Measurements | Level 1 |  |
Assets |  |
Mortgage loans held for sale | 0 | 0
Mortgage servicing rights | 0 | 0
Equity securities | 5 | 9
Liabilities |  |
Mortgage servicing rights financing | 0 | 0
Excess spread financing | 0 | 0
Recurring Fair Value Measurements | Level 1 | IRLCs |  |
Assets |  |
Derivative financial instruments | 0 | 0
Liabilities |  |
Fair Value | 0 |
Recurring Fair Value Measurements | Level 1 | LPCs |  |
Assets |  |
Derivative financial instruments | 0 | 0
Liabilities |  |
Fair Value | 0 | 0
Recurring Fair Value Measurements | Level 1 | Forward MBS trades |  |
Assets |  |
Derivative financial instruments | 0 | 0
Liabilities |  |
Fair Value | 0 | 0
Recurring Fair Value Measurements | Level 1 | Swap futures |  |
Liabilities |  |
Fair Value |  | 0
Recurring Fair Value Measurements | Level 1 | Treasury futures |  |
Liabilities |  |
Fair Value | 0 |
Recurring Fair Value Measurements | Level 2 |  |
Assets |  |
Mortgage loans held for sale | 2,072 | 4,381
Mortgage servicing rights | 0 | 0
Equity securities | 0 | 0
Liabilities |  |
Mortgage servicing rights financing | 0 | 0
Excess spread financing | 0 | 0
Recurring Fair Value Measurements | Level 2 | IRLCs |  |
Assets |  |
Derivative financial instruments | 0 | 0
Liabilities |  |
Fair Value | 0 |
Recurring Fair Value Measurements | Level 2 | LPCs |  |
Assets |  |
Derivative financial instruments | 0 | 0
Liabilities |  |
Fair Value | 0 | 0
Recurring Fair Value Measurements | Level 2 | Forward MBS trades |  |
Assets |  |
Derivative financial instruments | 12 | 7
Liabilities |  |
Fair Value | 13 | 8
Recurring Fair Value Measurements | Level 2 | Swap futures |  |
Liabilities |  |
Fair Value |  | 6
Recurring Fair Value Measurements | Level 2 | Treasury futures |  |
Liabilities |  |
Fair Value | 18 |
Recurring Fair Value Measurements | Level 3 |  |
Assets |  |
Mortgage loans held for sale | 0 | 0
Mortgage servicing rights | 6,151 | 4,223
Equity securities | 54 | 54
Liabilities |  |
Mortgage servicing rights financing | 24 | 10
Excess spread financing | 532 | 768
Recurring Fair Value Measurements | Level 3 | IRLCs |  |
Assets |  |
Derivative financial instruments | 62 | 134
Liabilities |  |
Fair Value | 1 |
Recurring Fair Value Measurements | Level 3 | LPCs |  |
Assets |  |
Derivative financial instruments | 3 | 3
Liabilities |  |
Fair Value | 1 | 2
Recurring Fair Value Measurements | Level 3 | Forward MBS trades |  |
Assets |  |
Derivative financial instruments | 0 | 0
Liabilities |  |
Fair Value | 0 | 0
Recurring Fair Value Measurements | Level 3 | Swap futures |  |
Liabilities |  |
Fair Value |  | $ 0
Recurring Fair Value Measurements | Level 3 | Treasury futures |  |
Liabilities |  |
Fair Value | $ 0 |

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