Derivatives and Hedging - Summary of Fair Values of Derivatives Instruments Recognized in Consolidated Statements of Financial Condition (Detail) - Forward Foreign Currency Exchange Contracts [Member] - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Other Assets [Member] | ||
| Derivatives Fair Value [Line Items] | ||
| Other assets, fair value | $ 35 | $ 7 |
| Other Liabilities [Member] | ||
| Derivatives Fair Value [Line Items] | ||
| Other liabilities, fair value | $ 7 | $ 35 |