v3.26.3
Investment Securities - Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
AFS securities:    
Amortized Cost $ 67,635 $ 69,302
Gross Unrealized Gains 42 390
Gross Unrealized Losses (6,154) (4,650)
Net unrealized gains (losses) (6,112) (4,260)
Fair Value 61,523 65,042
Portfolio level basis adjustments, excluded from amortized cost (574) 77
Portfolio level basis adjustments, net unrealized gain (loss) 574 (77)
Total AFS securities, amortized cost 67,061 69,379
Total AFS securities, net unrealized gains (losses) (5,538) (4,337)
HTM securities:    
Amortized Cost 48,666 47,186
U.S. Treasury    
AFS securities:    
Amortized Cost 15,641 12,727
Gross Unrealized Gains 33 89
Gross Unrealized Losses (157) (24)
Net unrealized gains (losses) (124) 65
Fair Value 15,517 12,792
GSE    
AFS securities:    
Amortized Cost 448 481
Gross Unrealized Gains 0 4
Gross Unrealized Losses (44) (25)
Net unrealized gains (losses) (44) (21)
Fair Value 404 460
Agency MBS – residential    
AFS securities:    
Amortized Cost 45,508 51,971
Gross Unrealized Gains 3 272
Gross Unrealized Losses (5,196) (4,017)
Net unrealized gains (losses) (5,193) (3,745)
Fair Value 40,315 48,226
HTM securities:    
Amortized Cost 48,666 47,186
Gross Unrealized Gains 0 0
Gross Unrealized Losses (10,403) (8,056)
Net unrealized gains (losses) (10,403) (8,056)
HTM securities, fair value 38,263 39,130
Agency MBS – commercial    
AFS securities:    
Amortized Cost 3,809 3,762
Gross Unrealized Gains 0 12
Gross Unrealized Losses (730) (574)
Net unrealized gains (losses) (730) (562)
Fair Value 3,079 3,200
States and political subdivisions    
AFS securities:    
Amortized Cost 342 347
Gross Unrealized Gains 5 13
Gross Unrealized Losses (27) (10)
Net unrealized gains (losses) (22) 3
Fair Value 320 350
Collateralized loan obligations    
AFS securities:    
Amortized Cost 1,885  
Gross Unrealized Gains 1  
Gross Unrealized Losses 0  
Net unrealized gains (losses) 1  
Fair Value 1,886  
Other    
AFS securities:    
Amortized Cost 2 14
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Net unrealized gains (losses) 0 0
Fair Value $ 2 $ 14