v3.26.1
Derivative Financial Instruments And Hedging Activities (Schedule Of Gains (Losses) Recognized Related To Derivatives Not Designated As Hedging Instruments) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Derivative [Line Items]    
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments $ 30 $ 31
Not Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:NoninterestIncome | Capital markets income [Member]    
Derivative [Line Items]    
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments 27 15
Not Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:NoninterestIncome | Mortgage income    
Derivative [Line Items]    
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments 3 16
Interest rate swaps | Not Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:NoninterestIncome | Capital markets income [Member]    
Derivative [Line Items]    
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments 10 6
Interest rate swaps | Not Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:NoninterestIncome | Mortgage income    
Derivative [Line Items]    
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments 0 16
Interest rate options | Not Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:NoninterestIncome | Capital markets income [Member]    
Derivative [Line Items]    
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments 7 8
Interest rate options | Not Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:NoninterestIncome | Mortgage income    
Derivative [Line Items]    
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments 0 1
Interest rate futures and forward commitments | Not Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:NoninterestIncome | Capital markets income [Member]    
Derivative [Line Items]    
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments 3 3
Interest rate futures and forward commitments | Not Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:NoninterestIncome | Mortgage income    
Derivative [Line Items]    
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments 3 (1)
Other Contracts [Member] | Not Designated as Hedging Instrument | Income Statement Location [Axis]: us-gaap:NoninterestIncome | Capital markets income [Member]    
Derivative [Line Items]    
Gain or (Loss) of Derivatives Not Designated as Hedging Instruments $ 7 $ (2)