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Contracts Accounted for as Credit Derivatives - Narrative (Details) - LBIE vs. AG Financial Products - Positive Outcome of Litigation - USD ($) $ in Millions | 3 Months Ended |
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Mar. 31, 2025 | Nov. 28, 2011
Pending Litigation | AG Financial Products Inc. |  |
Credit Derivatives |  |
Other credit derivative transactions which LBIE owes to AG Financial Products as per calculation of AG financial products |  | $ 25
Pending Litigation | Lehman Brothers International (Europe) |  |
Credit Derivatives |  |
Termination payments which AG Financial Products owes to LBIE as per calculation of LBIE |  | $ 1,400
Settled Litigation | AG Financial Products Inc. |  |
Credit Derivatives |  |
Litigation settlement, gain | $ 103 |

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