Transactions with Affiliated Funds - Fees Earned from Affiliated Funds (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2021 |
Jun. 30, 2020 |
Jun. 30, 2021 |
Jun. 30, 2020 |
|
| Transactions With Affiliated Funds [Abstract] | ||||
| Fees earned from funds | $ 783 | $ 804 | $ 1,601 | $ 1,725 |