Transactions with Affiliated Funds - Fees Earned from Affiliated Funds (Detail) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|
| Transactions With Affiliated Funds [Abstract] | ||||
| Fees earned from funds | $ 1,046 | $ 816 | $ 2,647 | $ 2,541 |