v3.26.3
Derivative Financial Instruments - Classifications and Hedging Relationships (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount $ 530,684 $ 493,990
Derivative assets, fair value 4,511 3,122
Derivative liability, fair value (6,822) (4,615)
Derivative Asset [Abstract]    
Amounts subject to master netting arrangements and exchange traded derivatives (2,290) (1,585)
Cash collateral (received) posted for amounts subject to master netting arrangements (266) (194)
Net Amount in Consolidated Balance Sheets 1,955 1,343
Derivative Liability [Abstract]    
Amounts subject to master netting arrangements and exchange traded derivatives 2,290 1,585
Cash collateral (received) posted for amounts subject to master netting arrangements 1,203 1,233
Net Amount in Consolidated Balance Sheets (3,329) (1,797)
Designated as hedges | Swaps hedging commercial loans | Interest rate contracts: | Swaps | Location, Statement of Financial Position, Balance [Axis]: us-gaap:FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 80,522 97,135
Derivative assets, fair value 0 0
Derivative liability, fair value (3) 0
Designated as hedges | Total derivatives designated as hedges | Interest rate contracts:    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 136,527 150,919
Derivative assets, fair value 0 0
Derivative liability, fair value (6) 0
Designated as hedges | Total derivatives designated as hedges | Interest rate contracts: | Swaps | Location, Statement of Financial Position, Balance [Axis]: us-gaap:AvailableForSaleSecuritiesDebtSecurities    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 26,355 26,751
Derivative assets, fair value 0 0
Derivative liability, fair value (1) 0
Designated as hedges | Total derivatives designated as hedges | Interest rate contracts: | Swaps | Location, Statement of Financial Position, Balance [Axis]: us-gaap:LongTermDebt    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 29,650 27,033
Derivative assets, fair value 0 0
Derivative liability, fair value (2) 0
Not designated as hedges    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 394,157 343,071
Derivative assets, fair value 4,511 3,122
Derivative liability, fair value (6,816) (4,615)
Not designated as hedges | Client-related and other risk management:    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 359,292 311,516
Derivative assets, fair value 4,303 3,092
Derivative liability, fair value (6,729) (4,495)
Not designated as hedges | Client-related and other risk management: | Interest rate contracts: | Swaps    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 204,676 185,861
Derivative assets, fair value 539 516
Derivative liability, fair value (2,063) (944)
Not designated as hedges | Client-related and other risk management: | Interest rate contracts: | Written options    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 11,576 10,577
Derivative assets, fair value 0 2
Derivative liability, fair value (60) (18)
Not designated as hedges | Client-related and other risk management: | Interest rate contracts: | Purchased options    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 6,721 8,558
Derivative assets, fair value 24 15
Derivative liability, fair value 0 0
Not designated as hedges | Client-related and other risk management: | Interest rate contracts: | Futures and forwards    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 3,270 2,636
Derivative assets, fair value 3 2
Derivative liability, fair value (1) (14)
Not designated as hedges | Client-related and other risk management: | Foreign exchange contracts: | Swaps    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 19,760 13,647
Derivative assets, fair value 453 450
Derivative liability, fair value (404) (382)
Not designated as hedges | Client-related and other risk management: | Foreign exchange contracts: | Futures and forwards    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 27,825 27,008
Derivative assets, fair value 384 338
Derivative liability, fair value (313) (335)
Not designated as hedges | Client-related and other risk management: | Foreign exchange contracts: | Other    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 2,631 2,820
Derivative assets, fair value 29 35
Derivative liability, fair value (24) (33)
Not designated as hedges | Client-related and other risk management: | Equity contracts: | Written options    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 36,613 26,600
Derivative assets, fair value 19 12
Derivative liability, fair value (2,882) (2,278)
Not designated as hedges | Client-related and other risk management: | Equity contracts: | Purchased options    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 17,888 12,485
Derivative assets, fair value 2,072 1,358
Derivative liability, fair value (117) (121)
Not designated as hedges | Client-related and other risk management: | Equity contracts: | Other    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 2,345 1,386
Derivative assets, fair value 27 11
Derivative liability, fair value (178) (59)
Not designated as hedges | Client-related and other risk management: | Commodity contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 12,766 8,340
Derivative assets, fair value 726 322
Derivative liability, fair value (677) (302)
Not designated as hedges | Client-related and other risk management: | Credit contracts: | Credit default swaps    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 1,328 900
Derivative assets, fair value 0 0
Derivative liability, fair value (4) 0
Not designated as hedges | Client-related and other risk management: | Credit contracts: | Total return swaps    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 1,508 1,835
Derivative assets, fair value 27 31
Derivative liability, fair value (4) (7)
Not designated as hedges | Client-related and other risk management: | Credit contracts: | Risk participation agreements    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 10,385 8,863
Derivative assets, fair value 0 0
Derivative liability, fair value (2) (2)
Not designated as hedges | MSRs and mortgage banking: | Interest rate contracts:    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 34,865 31,555
Derivative assets, fair value 208 30
Derivative liability, fair value (87) (120)
Not designated as hedges | MSRs and mortgage banking: | Interest rate contracts: | Swaps    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 15,941 11,035
Derivative assets, fair value 0 0
Derivative liability, fair value 0 0
Not designated as hedges | MSRs and mortgage banking: | Interest rate contracts: | Written options    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 418 1,288
Derivative assets, fair value 12 14
Derivative liability, fair value 0 0
Not designated as hedges | MSRs and mortgage banking: | Interest rate contracts: | Purchased options    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 10,685 10,465
Derivative assets, fair value 157 10
Derivative liability, fair value (41) (118)
Not designated as hedges | MSRs and mortgage banking: | Interest rate contracts: | Interest rate lock commitments    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 956 960
Derivative assets, fair value 0 4
Derivative liability, fair value (42) (2)
Not designated as hedges | MSRs and mortgage banking: | Interest rate contracts: | When issued securities, forward rate agreements, forward commitments, and futures    
Derivative Instruments, Gain (Loss) [Line Items]    
Notional or Contractual Amount 6,865 7,807
Derivative assets, fair value 39 2
Derivative liability, fair value $ (4) $ 0