v3.25.4
Derivative Financial Instruments And Hedging Activities (Schedule Of Derivative Instruments Notional And Fair Values) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount $ 171,138 $ 163,738
Derivative Asset, Estimated Fair Value 1,335 1,816
Derivative Liability, Estimated Fair Value 1,445 2,551
Derivative Asset, Fair Value of Derivative Contracts Offset in Accordance with Entity's Policy that were Offset Under Master Netting Agreements 1,120 1,703
Derivative Liability, Fair Value of Derivative Contracts Offset In Accordance with Policy Election that were Offset Under Master Netting Agreements 964 1,615
Derivative Asset 215 113
Derivative Liability 481 936
Derivative Asset, Collateral, Obligation to Return Cash, Offset (83) (106)
Derivative Liability, Collateral, Right to Reclaim Cash, Offset (123) (87)
Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 49,985 44,144
Derivative Asset, Estimated Fair Value 105 30
Derivative Liability, Estimated Fair Value 270 819
Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 121,153 119,594
Derivative Asset, Estimated Fair Value 1,230 1,786
Derivative Liability, Estimated Fair Value 1,175 1,732
Interest rate swaps | Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 93,891 94,803
Interest rate swaps | Not Designated as Hedging Instrument | Other Assets    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Estimated Fair Value 1,023 1,608
Interest rate swaps | Not Designated as Hedging Instrument | Other Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Estimated Fair Value 996 1,598
Interest rate options | Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 10,674 11,005
Interest rate options | Not Designated as Hedging Instrument | Other Assets    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Estimated Fair Value 14 31
Interest rate options | Not Designated as Hedging Instrument | Other Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Estimated Fair Value 6 24
Interest rate futures and forward commitments | Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 1,537 1,247
Interest rate futures and forward commitments | Not Designated as Hedging Instrument | Other Assets    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Estimated Fair Value 8 8
Interest rate futures and forward commitments | Not Designated as Hedging Instrument | Other Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Estimated Fair Value 1 4
Other contracts | Not Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 15,051 12,539
Other contracts | Not Designated as Hedging Instrument | Other Assets    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Estimated Fair Value 185 139
Other contracts | Not Designated as Hedging Instrument | Other Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Estimated Fair Value 172 106
Fair Value Hedging | Interest rate swaps | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 8,067 5,484
Fair Value Hedging | Interest rate swaps | Designated as Hedging Instrument | Other Assets    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Estimated Fair Value 23 26
Fair Value Hedging | Interest rate swaps | Designated as Hedging Instrument | Other Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Estimated Fair Value 73 95
Cash Flow Hedging | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 41,918 38,660
Derivative Asset, Estimated Fair Value 82 4
Derivative Liability, Estimated Fair Value 197 724
Cash Flow Hedging | Interest rate swaps | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 39,918 36,660
Cash Flow Hedging | Interest rate swaps | Designated as Hedging Instrument | Other Assets    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Estimated Fair Value 80 0
Cash Flow Hedging | Interest rate swaps | Designated as Hedging Instrument | Other Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Estimated Fair Value 196 718
Cash Flow Hedging | Interest rate options | Designated as Hedging Instrument    
Derivatives, Fair Value [Line Items]    
Derivative, Notional Amount 2,000 2,000
Cash Flow Hedging | Interest rate options | Designated as Hedging Instrument | Other Assets    
Derivatives, Fair Value [Line Items]    
Derivative Asset, Estimated Fair Value 2 4
Cash Flow Hedging | Interest rate options | Designated as Hedging Instrument | Other Liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liability, Estimated Fair Value $ 1 $ 6