Fair Value Hierarchy - Trading Cash Instruments, Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Trading cash instruments, fair value disclosure | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Net realized gains/(losses) | $ (24) | $ 20 |
| Net realized gains / (losses) on assets | 38 | 32 |
| Net unrealized gains/(losses) | (62) | (12) |
| Trading cash instruments, fair value disclosure | Market making | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Net realized gains/(losses) | (64) | (3) |
| Trading cash instruments, fair value disclosure | Interest income | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Net realized gains/(losses) | 40 | 23 |
| Trading cash instruments assets | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Net realized gains / (losses) on assets | 38 | 32 |
| Net unrealized gains/(losses) | $ (62) | $ (12) |