Derivatives and Hedging - Summary of Fair Values of Derivatives Instruments Recognized in Consolidated Statements of Financial Condition (Detail) $ in Millions |
Dec. 31, 2020
USD ($)
|
|---|---|
| Other Assets [Member] | |
| Derivatives Fair Value [Line Items] | |
| Other assets, fair value | $ 13 |
| Other Liabilities [Member] | |
| Derivatives Fair Value [Line Items] | |
| Other liabilities, fair value | 55 |
| Forward Foreign Currency Exchange Contracts [Member] | Other Assets [Member] | |
| Derivatives Fair Value [Line Items] | |
| Other assets, fair value | 13 |
| Forward Foreign Currency Exchange Contracts [Member] | Other Liabilities [Member] | |
| Derivatives Fair Value [Line Items] | |
| Other liabilities, fair value | 5 |
| Total Return Swaps [Member] | Other Liabilities [Member] | |
| Derivatives Fair Value [Line Items] | |
| Other liabilities, fair value | $ 50 |