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Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Loss Contingencies [Line Items] |  |
Repurchase Reserve | $ 79 | $ 22
Litigation and Regulatory Matters |  |
Loss Contingencies [Line Items] |  |
Legal fees | 39 | $ 23
Min | Litigation and Regulatory Matters |  |
Loss Contingencies [Line Items] |  |
Reasonably possible loss | 1 |
Max | Litigation and Regulatory Matters |  |
Loss Contingencies [Line Items] |  |
Reasonably possible loss | $ 3 |

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- Definition The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483621/220-10-S99-2 + Details
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