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Business Combinations - Preliminary Allocation (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Mar. 20, 2023 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Fair value of liabilities assumed: |  |  |  |  |
Bargain purchase gain |  | $ 0 | $ 0 | $ 2,142 | $ 0
Signature Bridge Bank |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Purchase Price consideration | $ 85 |  |  |  |
Fair value of assets acquired: |  |  |  |  |
Cash & cash equivalents | 25,043 |  |  |  |
Loans held for sale | 232 |  |  |  |
Total loans held for investment | 11,741 |  |  |  |
CDI and other intangible assets | 464 |  |  |  |
Other assets | 510 |  |  |  |
Total assets acquired | 37,990 |  |  |  |
Fair value of liabilities assumed: |  |  |  |  |
Deposits | 33,568 |  |  |  |
Other liabilities | 2,195 |  |  |  |
Total liabilities assumed | 35,763 |  |  |  |
Fair value of net identifiable assets | 2,227 |  |  |  |
Bargain purchase gain | 2,142 |  |  | $ 2,100 |
Signature Bridge Bank | Previously Reported |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Purchase Price consideration | 85 |  |  |  |
Fair value of assets acquired: |  |  |  |  |
Cash & cash equivalents | 25,043 |  |  |  |
Loans held for sale | 232 |  |  |  |
Total loans held for investment | 12,218 |  |  |  |
CDI and other intangible assets | 464 |  |  |  |
Other assets | 679 |  |  |  |
Total assets acquired | 38,636 |  |  |  |
Fair value of liabilities assumed: |  |  |  |  |
Deposits | 33,568 |  |  |  |
Other liabilities | 2,982 |  |  |  |
Total liabilities assumed | 36,550 |  |  |  |
Fair value of net identifiable assets | 2,086 |  |  |  |
Bargain purchase gain | 2,001 |  |  |  |
Signature Bridge Bank | Restatement Adjustment |  |  |  |  |
Fair value of assets acquired: |  |  |  |  |
Total loans held for investment | (477) |  |  |  |
CDI and other intangible assets | 0 |  |  |  |
Other assets | (169) |  |  |  |
Total assets acquired | (646) |  |  |  |
Fair value of liabilities assumed: |  |  |  |  |
Deposits | 0 |  |  |  |
Other liabilities | (787) |  |  |  |
Total liabilities assumed | (787) |  |  |  |
Fair value of net identifiable assets | 141 |  |  |  |
Bargain purchase gain | 141 |  |  |  |
Signature Bridge Bank | Commercial and industrial |  |  |  |  |
Fair value of assets acquired: |  |  |  |  |
Total loans held for investment | 9,888 |  |  |  |
Signature Bridge Bank | Commercial and industrial | Previously Reported |  |  |  |  |
Fair value of assets acquired: |  |  |  |  |
Total loans held for investment | 10,102 |  |  |  |
Signature Bridge Bank | Commercial and industrial | Restatement Adjustment |  |  |  |  |
Fair value of assets acquired: |  |  |  |  |
Total loans held for investment | (214) |  |  |  |
Signature Bridge Bank | Commercial real estate |  |  |  |  |
Fair value of assets acquired: |  |  |  |  |
Total loans held for investment | 1,680 |  |  |  |
Signature Bridge Bank | Commercial real estate | Previously Reported |  |  |  |  |
Fair value of assets acquired: |  |  |  |  |
Total loans held for investment | 1,942 |  |  |  |
Signature Bridge Bank | Commercial real estate | Restatement Adjustment |  |  |  |  |
Fair value of assets acquired: |  |  |  |  |
Total loans held for investment | (262) |  |  |  |
Signature Bridge Bank | Consumer and other |  |  |  |  |
Fair value of assets acquired: |  |  |  |  |
Total loans held for investment | 173 |  |  |  |
Signature Bridge Bank | Consumer and other | Previously Reported |  |  |  |  |
Fair value of assets acquired: |  |  |  |  |
Total loans held for investment | 174 |  |  |  |
Signature Bridge Bank | Consumer and other | Restatement Adjustment |  |  |  |  |
Fair value of assets acquired: |  |  |  |  |
Total loans held for investment | $ (1) |  |  |  |

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