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Contingencies (Details) - LBIE vs. AG Financial Products - Positive Outcome of Litigation - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2023
Dec. 31, 2022
Nov. 28, 2011
AG Financial Products Inc. | Pending Litigation        
Commitments and Contingencies Legal Proceedings        
Loss contingency accrual   $ 0 $ 20  
Payment for termination of other credit derivative transactions       $ 25
AG Financial Products Inc. | Settled Litigation | Subsequent Event        
Commitments and Contingencies Legal Proceedings        
Litigation settlement, gain $ 103      
Lehman Brothers International (Europe) | Pending Litigation        
Commitments and Contingencies Legal Proceedings        
Termination payments which AG Financial Products owes to LBIE as per calculation of LBIE       $ 1,400