Consolidated Sponsored Investment Products - Schedule of Net Gain (Loss) Related to Consolidated VIEs (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Variable Interest Entity [Line Items] | |||
| Nonoperating net gain (loss) on consolidated VIEs | $ 342 | $ 1 | $ 161 |
| Net income (loss) attributable to noncontrolling interests | 50 | (3) | 37 |
| Consolidated Variable Interest Entities [Member] | |||
| Variable Interest Entity [Line Items] | |||
| Nonoperating net gain (loss) on consolidated VIEs | 210 | (105) | 118 |
| Net income (loss) attributable to noncontrolling interests | $ 42 | $ (6) | $ 33 |