v3.25.4
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
Dec. 31, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Debt Securities held to maturity, amortized cost $ 6,473 $ 5,170
Debt Securities held to maturity, estimated fair value 5,584 4,226
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost 292  
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value 291  
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Amortized Cost 1,930  
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value 1,908  
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Amortized Cost 1,005  
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value 994  
Debt Securities, Available-for-sale, Allocated and Single Maturity Date, Maturity, after 10 Years, Amortized Cost 71  
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value 69  
Debt securities, amortized cost 28,134 28,183
Debt securities available for sale 27,560 26,224
Residential agency    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities held to maturity, amortized cost 6,103 4,663
Debt Securities held to maturity, estimated fair value 5,221 3,734
Debt securities, amortized cost 18,820 20,482
Debt securities available for sale 18,387 18,945
Commercial agency    
Debt Securities, Available-for-sale [Line Items]    
Debt Securities held to maturity, amortized cost 370 507
Debt Securities held to maturity, estimated fair value 363 492
Debt securities, amortized cost 5,925 4,389
Debt securities available for sale 5,829 4,090
Commercial non-agency    
Debt Securities, Available-for-sale [Line Items]    
Debt securities, amortized cost 91 92
Debt securities available for sale $ 82 $ 82