Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Commitment And Contingencies [Line Items] | ||
| Various capital commitments to fund sponsored investment products, including funds of private equity funds, real assets funds, opportunistic funds and distressed credit funds | $ 553 | |
| Derivative maximum risk of loss for credit protection | 17 | $ 17 |
| Amount of securities on loan subject to indemnification | 210,000 | |
| Collateral for indemnified securities | 226,000 | |
| Other Liabilities [Member] | ||
| Commitment And Contingencies [Line Items] | ||
| Contingent consideration at fair value | $ 193 |