v3.25.4
Debt Securities (Schedule Of Amortized Cost, Gross Unrealized Gains And Losses, And Estimated Fair Value Of Securities Available For Sale And Securities Held To Maturity) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]    
Debt securities, amortized cost $ 28,134 $ 28,183
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 299 26
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (873) (1,985)
Available-for-sale debt securities, net carrying value 27,560 26,224
Debt securities available for sale 27,560 26,224
Schedule of Held-to-maturity Securities [Line Items]    
Debt Securities held to maturity, amortized cost 6,473 5,170
Held To Maturity Debt Securities Gross Unrealized Gains 0 0
Held To Maturity Debt Securities Gross Unrealized Losses (867) (743)
Debt Securities held to maturity 5,606 4,427
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Gain 37 0
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Loss (59) (201)
Debt Securities held to maturity, estimated fair value 5,584 4,226
U.S. Treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Debt securities, amortized cost 2,313 2,088
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 10 2
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (47) (87)
Available-for-sale debt securities, net carrying value 2,276 2,003
Debt securities available for sale 2,276 2,003
Federal agency securities    
Debt Securities, Available-for-sale [Line Items]    
Debt securities, amortized cost 544 460
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 6 1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (7) (17)
Available-for-sale debt securities, net carrying value 543 444
Debt securities available for sale 543 444
Obligations of states and political subdivisions    
Debt Securities, Available-for-sale [Line Items]    
Debt securities, amortized cost 2 2
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 0 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax 0 0
Available-for-sale debt securities, net carrying value 2 2
Debt securities available for sale 2 2
Residential agency    
Debt Securities, Available-for-sale [Line Items]    
Debt securities, amortized cost 18,820 20,482
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 244 20
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (677) (1,557)
Available-for-sale debt securities, net carrying value 18,387 18,945
Debt securities available for sale 18,387 18,945
Schedule of Held-to-maturity Securities [Line Items]    
Debt Securities held to maturity, amortized cost 6,103 4,663
Held To Maturity Debt Securities Gross Unrealized Gains 0 0
Held To Maturity Debt Securities Gross Unrealized Losses (866) (743)
Debt Securities held to maturity 5,237 3,920
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Gain 37 0
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Loss (53) (186)
Debt Securities held to maturity, estimated fair value 5,221 3,734
Commercial agency    
Debt Securities, Available-for-sale [Line Items]    
Debt securities, amortized cost 5,925 4,389
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 34 1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (130) (300)
Available-for-sale debt securities, net carrying value 5,829 4,090
Debt securities available for sale 5,829 4,090
Schedule of Held-to-maturity Securities [Line Items]    
Debt Securities held to maturity, amortized cost 370 507
Held To Maturity Debt Securities Gross Unrealized Gains 0 0
Held To Maturity Debt Securities Gross Unrealized Losses (1) 0
Debt Securities held to maturity 369 507
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Gain 0 0
Held-to-maturity Debt Securities, Accumulated Unrecognized Holding Loss (6) (15)
Debt Securities held to maturity, estimated fair value 363 492
Commercial non-agency    
Debt Securities, Available-for-sale [Line Items]    
Debt securities, amortized cost 91 92
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 0 0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (9) (10)
Available-for-sale debt securities, net carrying value 82 82
Debt securities available for sale 82 82
Corporate and other debt securities    
Debt Securities, Available-for-sale [Line Items]    
Debt securities, amortized cost 439 670
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax 5 2
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax (3) (14)
Available-for-sale debt securities, net carrying value 441 658
Debt securities available for sale $ 441 $ 658