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Investments - Summary of Carrying Value of Total Investments (Detail) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Schedule of Investments [Line Items]    
Trading securities (including $1,868 and $1,829 held by CIPs at June 30, 2024 and December 31, 2023, respectively) $ 1,951 $ 1,871
Held-to-maturity investments 582 617
Total debt securities 2,533 2,488
Equity securities at FVTNI (including $2,120 and $1,429 held by CIPs at June 30, 2024 and December 31, 2023, respectively) 2,310 1,585
Total equity method investments 2,669 2,756
Loans held By CIPs 238 205
Total investments [1] 10,216 9,740
Other Investments [Member]    
Schedule of Investments [Line Items]    
Total investments 457 639
Equity Method Investments [Member]    
Schedule of Investments [Line Items]    
Total equity method investments 2,498 2,515
Deferred Cash Compensation Plans [Member]    
Schedule of Investments [Line Items]    
Total equity method investments 171 241
Deferred Cash Compensation Plans [Member] | Other Investments [Member]    
Schedule of Investments [Line Items]    
Total investments   9
Federal Reserve Bank Stock [Member]    
Schedule of Investments [Line Items]    
Total investments 92 92
Consolidated Entities [Member] | Carried Interest [Member]    
Schedule of Investments [Line Items]    
Total investments $ 1,917 $ 1,975
[1] At June 30, 2024, cash and cash equivalents, investments, other assets and other liabilities include $185 million, $5.5 billion, $117 million, and $2.3 billion, respectively, related to consolidated variable interest entities (“VIEs”). At December 31, 2023, cash and cash equivalents, investments, other assets and other liabilities include $234 million, $5.0 billion, $83 million, and $2.2 billion, respectively, related to consolidated VIEs.