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Commitments, Contingencies, Guarantees and Others - Other Contingencies (Details)
$ in Millions
9 Months Ended 11 Months Ended
Sep. 30, 2024
USD ($)
Sep. 30, 2024
USD ($)
Loss Contingencies [Line Items]    
Loss contingency, estimate of possible loss $ 400 $ 400
FDIC Special Assessment    
Loss Contingencies [Line Items]    
Operating expenses 330 289
Loss contingency, estimate of possible loss $ 200 $ 200