CONSOLIDATED SPONSORED INVESTMENT PRODUCTS - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2024 |
Mar. 31, 2023 |
|
| Condensed Income Statements, Captions [Line Items] | ||
| Operating expenses | $ 1,163.6 | $ 1,053.4 |
| Net cash provided by (used in) financing activities | (267.8) | (144.2) |
| Consolidation eliminations | ||
| Condensed Income Statements, Captions [Line Items] | ||
| Operating expenses | 1.2 | 0.6 |
| Net cash provided by (used in) financing activities | $ (19.4) | $ 4.4 |