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v3.25.3

Commitments and Contingencies (Narrative) (Details) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2025 USD ($) | Sep. 30, 2024 entity | Sep. 30, 2025 USD ($) | Sep. 30, 2024 USD ($) entity | Dec. 31, 2024
Commitments and Contingencies Disclosure [Abstract] |  |  |  |  |
Financial guarantees in connection with standby letters of credit |  |  | $ 0 | $ 0 |
Standby letters of credit expiring within one year | $ 329 |  | 329 |  |
Standby letters of credit expiring thereafter | 25 |  | 25 |  |
Loss Contingency Accrual | 1 |  | 1 |  |
Concentration Risk [Line Items] |  |  |  |  |
Loss Contingency Accrual | 1 |  | 1 |  |
iCap Entities [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Number of Defendant Entities | entity |  |  |  | 34 |
Loss Contingency, Damages Sought, Value |  |  | 290 |  |
iCap Trust [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Loss Contingency, Damages Sought, Value | 90 |  |  |  |
Loss Contingency, Number of Defendants | entity |  | 488 |  |  |
Professional Financial Investors, Inc. and Professional Investors Security Fund, Inc. [Member] |  |  |  |  |
Commitments and Contingencies Disclosure [Abstract] |  |  |  |  |
Loss Contingency Accrual | 55 |  | 55 |  |
Concentration Risk [Line Items] |  |  |  |  |
Loss Contingency Accrual | $ 55 |  | 55 |  |
Minimum | Professional Financial Investors, Inc. and Professional Investors Security Fund, Inc. [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Loss Contingency, Damages Sought, Value |  |  | 297 |  |
Maximum | Professional Financial Investors, Inc. and Professional Investors Security Fund, Inc. [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Loss Contingency, Damages Sought, Value |  |  | $ 368 |  |
Product Concentration Risk | Revenue Benchmark | Real Estate Loans As Part Of Loan Portfolio |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk (as a percent) |  |  | 77.00% |  | 75.00%
Product Concentration Risk | Revenue Benchmark | Multifamily Loans as Part of Loan portfolio [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk (as a percent) |  |  | 24.00% |  | 19.00%
Product Concentration Risk | Revenue Benchmark | Commercial Office Loans as Part of Loan portfolio [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk (as a percent) |  |  | 8.00% |  | 8.00%

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