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Summary of Significant Accounting Policies - Narrative (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Financing Receivable, Allowance for Credit Losses |  |  |
Cash and cash equivalents | $ 11,475,000,000 | $ 2,032,000,000 |
Interest-bearing deposits | 10,700,000,000 | 837,000,000 |
Securities reverse repurchase | 0 | 793,000,000 |
Federal funds sold | 0 | 0 |
Restricted cash | $ 134,000,000 | $ 50,000,000 |
Percent of loans held for investment | 100.00% | 100.00% |
Goodwill impairment | $ 2,426,000,000 | $ 0 | $ 0
Depreciation | 39,000,000 | 18,000,000 | 21,000,000
Investment in BOLI | 1,580,000,000 | 1,561,000,000 |
Bank-owned life insurance | 43,000,000 | 32,000,000 | $ 29,000,000
LGG loans, repossessed assets | 14,000,000 |  |
Guarantees, fair value | 12,000,000 | 10,000,000 |
Accumulated depreciation | (526,000,000) | (434,000,000) |
Taxi medallions | 4,000,000 | 4,000,000 |
Other repossessed assets | 5,000,000 |  |
OREO | $ 5,000,000 | $ 8,000,000 |
Options available for future grants (in shares) | 16,143,893 |  |
Premises |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Estimated useful lives | 20 years |  |
Furniture, fixtures and equipment, and building improvements |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Estimated useful lives | 13 years 6 months |  |
Furniture, fixtures and equipment, and building improvements | Minimum |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Estimated useful lives | 3 years |  |
Furniture, fixtures and equipment, and building improvements | Maximum |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Estimated useful lives | 10 years |  |
Total loan commitments |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Percent of loans held for investment | 60.00% |  |

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