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Derivative Financial Instruments - Outstanding Balances (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Assets |  |
Derivatives, Fair Value [Line Items] |  |
Outstanding Notional | $ 2,043 | $ 9,293
Fair Value | 31 | 144
Gains/(Losses) | 459 | (43)
Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Outstanding Notional | 1,797 | 5,670
Fair Value | 24 | 16
Gains/(Losses) | (332) | (131)
Loan sale commitments | Assets |  |
Derivatives, Fair Value [Line Items] |  |
Outstanding Notional | 354 | 1,051
Fair Value | 10 | 25
Gains/(Losses) | (15) | (77)
IRLCs | Assets |  |
Derivatives, Fair Value [Line Items] |  |
Outstanding Notional | 755 | 5,237
Fair Value | 22 | 134
Gains/(Losses) | (112) | (280)
IRLCs | Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Outstanding Notional | 15 | 10
Fair Value | 0 | 0
Gains/(Losses) | 0 | 0
LPCs | Assets |  |
Derivatives, Fair Value [Line Items] |  |
Outstanding Notional | 145 | 487
Fair Value | 1 | 3
Gains/(Losses) | (2) | (35)
LPCs | Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Outstanding Notional | 209 | 646
Fair Value | 1 | 2
Gains/(Losses) | 1 | (1)
Forward MBS trades | Assets |  |
Derivatives, Fair Value [Line Items] |  |
Outstanding Notional | 1,143 | 3,569
Fair Value | 8 | 7
Gains/(Losses) | 569 | 272
Forward MBS trades | Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Outstanding Notional | 681 | 4,091
Fair Value | 9 | 8
Gains/(Losses) | (56) | (110)
Treasury futures |  |
Derivatives, Fair Value [Line Items] |  |
Fair Value | 14 | 6
Treasury futures | Assets |  |
Derivatives, Fair Value [Line Items] |  |
Outstanding Notional | 0 |
Fair Value | 0 |
Gains/(Losses) | 4 |
Treasury futures | Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Outstanding Notional | 892 | 923
Gains/(Losses) | $ (277) | (6)
Swap futures | Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Outstanding Notional |  | 0
Fair Value |  | 0
Gains/(Losses) |  | $ (14)

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