Revenue - Schedule of Changes in Deferred Carried Interest Liability (Detail) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
|
| Revenue From Contract With Customer [Abstract] | ||
| Beginning balance | $ 293 | $ 219 |
| Net increase (decrease) in unrealized allocations | 259 | 92 |
| Performance fee revenue recognized | (75) | (18) |
| Other | 6 | |
| Ending balance | $ 483 | $ 293 |