Quarterly report [Sections 13 or 15(d)]

Securities - AFS Debt Securities in a Continuous Unrealized Loss Position (Details)

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Securities - AFS Debt Securities in a Continuous Unrealized Loss Position (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Fair Value    
Less than Twelve Months $ 150,447 $ 30,626
Twelve Months or Longer 78,241 101,201
Total 228,688 131,827
Gross Unrealized Losses    
Less than Twelve Months (510) (55)
Twelve Months or Longer (2,449) (2,548)
Total (2,959) (2,603)
Mortgage-backed securities    
Fair Value    
Less than Twelve Months 33,470 12,943
Twelve Months or Longer 22,408 26,544
Total 55,878 39,487
Gross Unrealized Losses    
Less than Twelve Months (200) (32)
Twelve Months or Longer (1,620) (1,720)
Total (1,820) (1,752)
Agency    
Fair Value    
Less than Twelve Months 17,327 1,645
Twelve Months or Longer 16,487 18,512
Total 33,814 20,157
Gross Unrealized Losses    
Less than Twelve Months (93) 0
Twelve Months or Longer (1,077) (1,179)
Total (1,170) (1,179)
Agency-collateralized mortgage obligations    
Fair Value    
Less than Twelve Months 456 2,503
Twelve Months or Longer 1,377 2,351
Total 1,833 4,854
Gross Unrealized Losses    
Less than Twelve Months (1) (5)
Twelve Months or Longer (136) (127)
Total (137) (132)
Commercial    
Fair Value    
Less than Twelve Months 15,687 8,795
Twelve Months or Longer 4,394 5,527
Total 20,081 14,322
Gross Unrealized Losses    
Less than Twelve Months (106) (27)
Twelve Months or Longer (346) (358)
Total (452) (385)
Non-agency residential    
Fair Value    
Less than Twelve Months 0 0
Twelve Months or Longer 150 154
Total 150 154
Gross Unrealized Losses    
Less than Twelve Months 0 0
Twelve Months or Longer (61) (56)
Total (61) (56)
U.S. Treasury and government agencies    
Fair Value    
Less than Twelve Months 97,001 5,398
Twelve Months or Longer 48,515 68,763
Total 145,516 74,161
Gross Unrealized Losses    
Less than Twelve Months (250) (7)
Twelve Months or Longer (616) (614)
Total (866) (621)
Non-U.S. securities    
Fair Value    
Less than Twelve Months 15,834 10,891
Twelve Months or Longer 2,704 2,808
Total 18,538 13,699
Gross Unrealized Losses    
Less than Twelve Months (39) (10)
Twelve Months or Longer (8) (8)
Total (47) (18)
Other taxable securities    
Fair Value    
Less than Twelve Months 3,770 979
Twelve Months or Longer 1,304 1,356
Total 5,074 2,335
Gross Unrealized Losses    
Less than Twelve Months (20) (5)
Twelve Months or Longer (37) (31)
Total (57) (36)
Tax-exempt securities    
Fair Value    
Less than Twelve Months 372 415
Twelve Months or Longer 3,310 1,730
Total 3,682 2,145
Gross Unrealized Losses    
Less than Twelve Months (1) (1)
Twelve Months or Longer (168) (175)
Total $ (169) $ (176)