Collateralized Transactions (Narrative) (Details) - USD ($) |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Disclosure Collateralized Transactions [Abstract] | ||
| Customers receivables | $ 65,346,000,000 | $ 64,432,000,000 |
| Securities purchased under agreement to resell segregated for regulatory purposes | 28,200,000,000 | 21,400,000,000 |
| Securities borrowed that were segregated to satisfy regulatory requirements | $ 2,700,000,000 | $ 0 |