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Commitments, Contingencies, Guarantees and Others - Other Contingencies (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2022
Loss Contingencies [Line Items] |  |
Loss contingency, estimate of possible loss | $ 200 |
FDIC Special Assessment |  |
Loss Contingencies [Line Items] |  |
Operating expenses | 42 | $ 289
Loss Contingency Accrual | 331 |
Loss contingency, estimate of possible loss | $ 200 |

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