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Investments - Summary of Carrying Value of Total Investments (Detail) (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Trading securities [1] $ 3,304 $ 2,789
Equity securities at FVTNI [1] 2,612 2,282
Investments [2] 14,574 13,271
Deferred Cash Compensation Plan Mutual Fund Investments [Member]    
Schedule of Investments [Line Items]    
Debt securities 26  
Investments 29 37
Consolidated Sponsored Investment Products [Member]    
Schedule of Investments [Line Items]    
Trading securities 3,271 2,782
Equity securities at FVTNI 2,147 1,681
Investments $ 10,402 $ 9,131
[1] Amounts include investments held to economically hedge the impact of market valuation changes on certain deferred cash compensation plans. Amounts related to deferred cash compensation plans included within debt securities comprised $26 million as of March 31, 2026, and amounts included within equity securities held at fair value recorded through net income ("FVTNI") comprised $29 million and $37 million at March 31, 2026 and December 31, 2025, respectively.
[2] At March 31, 2026, cash and cash equivalents, investments, other assets and other liabilities include $238 million, $9.1 billion, $132 million and $3.9 billion, respectively, related to consolidated variable interest entities (“VIEs”). At December 31, 2025, cash and cash equivalents, investments, other assets and other liabilities include $428 million, $8.5 billion, $76 million and $4.1 billion, respectively, related to consolidated VIEs.