v3.26.3
Fair Value Disclosures - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Trading securities [1] $ 3,330 $ 2,789
Equity securities at FVTNI [1] 3,181 2,282
CLOs held at fair value 537 568
Separate account assets 65,056 60,098
Separate account collateral liabilities under securities lending agreements 5,465 7,922
Equity Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Equity securities at FVTNI 3,181 2,282
Investments Measured at NAV [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other assets 176 103
Investments Measured at NAV [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Other liabilities 661 302
Fair Value, Measurements, Recurring [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total debt securities 3,798 3,296
Equity securities at FVTNI 3,181 2,282
Total equity method 2,569 2,133
CLOs held at fair value 537 568
Federal Reserve Bank stock 88 87
Carried interest 3,690 3,710
Other investments 1,521 1,195
Total investments 15,384 13,271
Other assets 371 274
Separate account assets 65,056 60,098
Total separate account collateral held under securities lending agreements 5,465 7,922
Total 86,276 81,565
Separate account collateral liabilities under securities lending agreements 5,465 7,922
Contingent consideration liability fair value 5,858 8,429
Other liabilities 485 13
Total liabilities measured at fair value 11,808 16,364
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total debt securities 0 0
Equity securities at FVTNI 3,160 2,146
Total equity method 229 205
CLOs held at fair value 0 0
Federal Reserve Bank stock 0 0
Carried interest 0 0
Other investments 1 0
Total investments 3,390 2,351
Other assets 249 113
Separate account assets 42,623 38,688
Total separate account collateral held under securities lending agreements 3,650 4,194
Total 49,912 45,346
Separate account collateral liabilities under securities lending agreements 3,650 4,194
Contingent consideration liability fair value 0 0
Other liabilities 0 0
Total liabilities measured at fair value 3,650 4,194
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total debt securities 3,302 2,782
Equity securities at FVTNI 0 0
Total equity method 160 148
CLOs held at fair value 476 495
Federal Reserve Bank stock 0 0
Carried interest 0 0
Other investments 0 0
Total investments 3,938 3,425
Other assets 5 10
Separate account assets 21,884 20,895
Total separate account collateral held under securities lending agreements 1,815 3,728
Total 27,642 28,058
Separate account collateral liabilities under securities lending agreements 1,815 3,728
Contingent consideration liability fair value 0 0
Other liabilities 485 13
Total liabilities measured at fair value 2,300 3,741
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total debt securities 28 7
Equity securities at FVTNI 21 136
Total equity method 0 0
CLOs held at fair value 61 73
Federal Reserve Bank stock 0 0
Carried interest 0 0
Other investments 0 0
Total investments 110 216
Other assets 117 151
Separate account assets 0 0
Total separate account collateral held under securities lending agreements 0 0
Total 227 367
Separate account collateral liabilities under securities lending agreements 0 0
Contingent consideration liability fair value 5,858 8,429
Other liabilities 0 0
Total liabilities measured at fair value 5,858 8,429
Fair Value, Measurements, Recurring [Member] | Debt Securities/ Fixed Income Mutual Funds [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Trading securities 3,330 2,789
Held-to-maturity investments 468 507
Fair Value, Measurements, Recurring [Member] | Debt Securities/ Fixed Income Mutual Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Trading securities 0 0
Held-to-maturity investments 0 0
Fair Value, Measurements, Recurring [Member] | Debt Securities/ Fixed Income Mutual Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Trading securities 3,302 2,782
Held-to-maturity investments 0 0
Fair Value, Measurements, Recurring [Member] | Debt Securities/ Fixed Income Mutual Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Trading securities 28 7
Held-to-maturity investments 0 0
Fair Value, Measurements, Recurring [Member] | Hedge Funds/Funds of Hedge Funds/Other [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 423 446
Fair Value, Measurements, Recurring [Member] | Hedge Funds/Funds of Hedge Funds/Other [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Hedge Funds/Funds of Hedge Funds/Other [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Hedge Funds/Funds of Hedge Funds/Other [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Equity Fixed Income And Multi Asset Mutual Funds [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 389 353
Fair Value, Measurements, Recurring [Member] | Equity Fixed Income And Multi Asset Mutual Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 229 205
Fair Value, Measurements, Recurring [Member] | Equity Fixed Income And Multi Asset Mutual Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 160 148
Fair Value, Measurements, Recurring [Member] | Equity Fixed Income And Multi Asset Mutual Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Private/ Public Equity [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 453 510
Fair Value, Measurements, Recurring [Member] | Private/ Public Equity [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Private/ Public Equity [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Private/ Public Equity [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Real Assets Funds [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 849 524
Fair Value, Measurements, Recurring [Member] | Real Assets Funds [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Real Assets Funds [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Real Assets Funds [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Investments Related To Deferred Cash Compensation Plans [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 455 300
Fair Value, Measurements, Recurring [Member] | Investments Related To Deferred Cash Compensation Plans [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Investments Related To Deferred Cash Compensation Plans [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Investments Related To Deferred Cash Compensation Plans [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total separate account collateral held under securities lending agreements 3,650 4,194
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total separate account collateral held under securities lending agreements 3,650 4,194
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total separate account collateral held under securities lending agreements 0 0
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total separate account collateral held under securities lending agreements 0 0
Fair Value, Measurements, Recurring [Member] | Debt securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total separate account collateral held under securities lending agreements 1,815 3,728
Fair Value, Measurements, Recurring [Member] | Debt securities [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total separate account collateral held under securities lending agreements 0 0
Fair Value, Measurements, Recurring [Member] | Debt securities [Member] | Significant Other Observable Inputs (Level 2) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total separate account collateral held under securities lending agreements 1,815 3,728
Fair Value, Measurements, Recurring [Member] | Debt securities [Member] | Significant Unobservable Inputs (Level 3) [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total separate account collateral held under securities lending agreements 0 0
Fair Value, Measurements, Recurring [Member] | Investments Measured at NAV [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total debt securities 0 0
Equity securities at FVTNI 0 0
Total equity method 2,180 1,780
CLOs held at fair value 0 0
Federal Reserve Bank stock 0 0
Carried interest 0 0
Other investments 1,333 1,078
Total investments 3,513 2,858
Other assets 0 0
Separate account assets 0 0
Total separate account collateral held under securities lending agreements 0 0
Total 3,513 2,858
Separate account collateral liabilities under securities lending agreements 0 0
Contingent consideration liability fair value 0 0
Other liabilities 0 0
Total liabilities measured at fair value 0 0
Fair Value, Measurements, Recurring [Member] | Investments Measured at NAV [Member] | Debt Securities/ Fixed Income Mutual Funds [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Trading securities 0 0
Held-to-maturity investments 0 0
Fair Value, Measurements, Recurring [Member] | Investments Measured at NAV [Member] | Hedge Funds/Funds of Hedge Funds/Other [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 423 446
Fair Value, Measurements, Recurring [Member] | Investments Measured at NAV [Member] | Equity Fixed Income And Multi Asset Mutual Funds [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Investments Measured at NAV [Member] | Private/ Public Equity [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 453 510
Fair Value, Measurements, Recurring [Member] | Investments Measured at NAV [Member] | Real Assets Funds [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 849 524
Fair Value, Measurements, Recurring [Member] | Investments Measured at NAV [Member] | Investments Related To Deferred Cash Compensation Plans [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 455 300
Fair Value, Measurements, Recurring [Member] | Investments Measured at NAV [Member] | Equity Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total separate account collateral held under securities lending agreements 0 0
Fair Value, Measurements, Recurring [Member] | Investments Measured at NAV [Member] | Debt securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total separate account collateral held under securities lending agreements 0 0
Fair Value, Measurements, Recurring [Member] | Other [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Trading securities 0 0
Held-to-maturity investments 468 507
Total debt securities 468 507
Equity securities at FVTNI 0 0
Total equity method 0 0
CLOs held at fair value 0 0
Federal Reserve Bank stock 88 87
Carried interest 3,690 3,710
Other investments 187 117
Total investments 4,433 4,421
Other assets 0 0
Separate account assets 549 515
Total separate account collateral held under securities lending agreements 0 0
Total 4,982 4,936
Separate account collateral liabilities under securities lending agreements 0 0
Contingent consideration liability fair value 0 0
Other liabilities 0 0
Total liabilities measured at fair value 0 0
Fair Value, Measurements, Recurring [Member] | Other [Member] | Hedge Funds/Funds of Hedge Funds/Other [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Other [Member] | Equity Fixed Income And Multi Asset Mutual Funds [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Other [Member] | Private/ Public Equity [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Other [Member] | Real Assets Funds [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Other [Member] | Investments Related To Deferred Cash Compensation Plans [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total equity method 0 0
Fair Value, Measurements, Recurring [Member] | Other [Member] | Equity Securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total separate account collateral held under securities lending agreements 0 0
Fair Value, Measurements, Recurring [Member] | Other [Member] | Debt securities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Total separate account collateral held under securities lending agreements $ 0 $ 0
[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 $27 million as of September 30, 2026, and amounts included within equity securities held at fair value recorded through net income ("FVTNI") comprised $13 million and $37 million at September 30, 2026 and December 31, 2025, respectively.