Transactions with Affiliated Funds - Fees Receivable from Affiliated Funds and the Aggregate Carrying Value of the Firm's Interests in these Funds (Detail) - USD ($) $ in Millions |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Transactions With Affiliated Funds [Abstract] | ||
| Fees receivable from funds | $ 803 | $ 780 |
| Aggregate carrying value of interests in funds | $ 5,068 | $ 5,490 |