v3.26.1
Derivative Financial Instruments And Hedging Activities (Schedule Of Derivative Instruments Notional And Fair Values) (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount $ 177,308 $ 171,138
Derivative Asset, Estimated Fair Value 1,476 1,335
Derivative Liability, Estimated Fair Value 1,857 1,445
Derivative Asset, Fair Value of Derivative Contracts Offset in Accordance with Entity's Policy that were Offset Under Master Netting Agreements 1,285 1,120
Derivative Liability, Fair Value of Derivative Contracts Offset In Accordance with Policy Election that were Offset Under Master Netting Agreements 1,210 964
Derivative Asset 191 215
Derivative Liability 647 481
Derivative Asset, Collateral, Obligation to Return Cash, Offset (97) (83)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset (110) (123)
Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 52,460 49,985
Derivative Asset, Estimated Fair Value 99 105
Derivative Liability, Estimated Fair Value 529 270
Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 124,848 121,153
Derivative Asset, Estimated Fair Value 1,377 1,230
Derivative Liability, Estimated Fair Value 1,328 1,175
Interest rate swaps | Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 95,826 93,891
Derivative Asset, Estimated Fair Value 1,071 1,023
Derivative Liability, Estimated Fair Value 1,054 996
Interest rate options | Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 11,938 10,674
Derivative Asset, Estimated Fair Value 22 14
Derivative Liability, Estimated Fair Value 16 6
Interest rate futures and forward commitments | Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 1,602 1,537
Derivative Asset, Estimated Fair Value 8 8
Derivative Liability, Estimated Fair Value 1 1
Other contracts | Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 15,482 15,051
Derivative Asset, Estimated Fair Value 276 185
Derivative Liability, Estimated Fair Value 257 172
Fair Value Hedging | Interest rate swaps | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 10,162 8,067
Derivative Asset, Estimated Fair Value 81 23
Derivative Liability, Estimated Fair Value 54 73
Cash Flow Hedging | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 42,298 41,918
Derivative Asset, Estimated Fair Value 18 82
Derivative Liability, Estimated Fair Value 475 197
Cash Flow Hedging | Interest rate swaps | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 39,298 39,918
Derivative Asset, Estimated Fair Value 8 80
Derivative Liability, Estimated Fair Value 466 196
Cash Flow Hedging | Interest rate options | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 3,000 2,000
Derivative Asset, Estimated Fair Value 10 2
Derivative Liability, Estimated Fair Value $ 9 $ 1