v3.26.1
Debt Securities (Schedule Of Cost And Estimated Fair Value Of Securities Available For Sale And Securities Held To Maturity By Contractual Maturity) (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Debt Securities held to maturity, amortized cost $ 6,088 $ 6,473
Debt Securities held to maturity, estimated fair value 5,180 5,584
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost 393  
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value 391  
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost 1,279  
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value 1,272  
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost 1,292  
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value 1,276  
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost 66  
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value 64  
Debt securities, amortized cost 28,167 28,134
Debt securities available for sale 27,388 27,560
Residential agency    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities held to maturity, amortized cost 5,822 6,103
Debt Securities held to maturity, estimated fair value 4,919 5,221
Debt securities, amortized cost 18,288 18,820
Debt securities available for sale 17,694 18,387
Commercial agency    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities held to maturity, amortized cost 266 370
Debt Securities held to maturity, estimated fair value 261 363
Debt securities, amortized cost 6,684 5,925
Debt securities available for sale 6,534 5,829
Commercial non-agency    
Debt Securities, Available-for-sale [Line Items]    
Debt securities, amortized cost 165 91
Debt securities available for sale $ 157 $ 82