v3.26.1
INVESTMENTS - Schedule of Deconsolidation Impacts on Financial Statements (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Debt and Equity Securities, FV-NI [Line Items]        
Net decrease in assets of consolidated investment products $ (3.5) $ (181.4) $ (259.4) $ (604.1)
Net decrease in liabilities of consolidated investment products 1.2 (1.8) (0.2) (25.3)
Net decrease in redeemable non-controlling interests (4.8) (106.0) (202.9) (181.1)
Net gains recognized upon deconsolidation 369.1 235.5 320.8 306.2
Reclassification out of accumulated other comprehensive income | Currency translation adjustments        
Debt and Equity Securities, FV-NI [Line Items]        
Net gains recognized upon deconsolidation $ 0.0 $ 3.1 $ 0.2 $ 3.1