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Investment Securities - Additional Information (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Accrued interest receivable | $ 227 | $ 215
Investment securities | 45,100 | 21,300
Securities received as collateral | $ 16 | $ 82
Securities Available for Sale | Government Contracts Concentration Risk | US Treasury and Agency securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Percentage of portfolio | 97.00% | 97.00%

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