Quarterly report [Sections 13 or 15(d)]

Securities - Debt Securities (Details)

v3.26.1
Securities - Debt Securities (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Available-for-sale debt securities      
Amortized Cost $ 371,444   $ 388,611
Gross Unrealized Gains 478   790
Gross Unrealized Losses (2,959)   (2,603)
Fair Value 368,963   386,798
Other Debt Securities, Carried at Fair Value:      
Amortized Cost 17,492   16,066
Gross Unrealized Gains 118   200
Gross Unrealized Losses (184)   (89)
Fair Value 17,426   16,177
Debt securities carried at fair value:      
Amortized Cost 388,936   404,677
Gross Unrealized Gains 596   990
Gross Unrealized Losses (3,143)   (2,692)
Fair Value 386,389   402,975
Held-to-maturity debt securities      
Amortized Cost 514,763   522,685
Gross Unrealized Gains 2   2
Gross Unrealized Losses (81,154)   (80,257)
Fair Value 433,611   442,430
Debt securities:      
Amortized Cost 903,699   927,362
Gross Unrealized Gains 598   992
Gross Unrealized Losses (84,297)   (82,949)
Fair Value 820,000   845,405
Securities, pledged as collateral $ 132,100   153,800
Stockholders' Equity, Total | Investment Concentration Risk | Fannie Mae      
Debt securities:      
Concentration risk (more than) 10.00% 10.00%  
Stockholders' Equity, Total | Investment Concentration Risk | Freddie Mac      
Debt securities:      
Concentration risk (more than) 10.00% 10.00%  
FNMA      
Debt securities carried at fair value:      
Amortized Cost $ 245,800   246,900
Fair Value 206,500   208,000
FHLMC      
Debt securities carried at fair value:      
Amortized Cost 159,400   158,500
Fair Value 134,400   133,600
Mortgage-backed securities      
Available-for-sale debt securities      
Amortized Cost 107,391   92,505
Gross Unrealized Gains 354   353
Gross Unrealized Losses (1,820)   (1,752)
Fair Value 105,925   91,106
Debt securities carried at fair value:      
Fair Value 106,181    
Agency      
Available-for-sale debt securities      
Amortized Cost 44,544   34,240
Gross Unrealized Gains 72   80
Gross Unrealized Losses (1,170)   (1,179)
Fair Value 43,446   33,141
Debt securities carried at fair value:      
Fair Value 43,451    
Held-to-maturity debt securities      
Amortized Cost 387,880   395,415
Gross Unrealized Gains 0   0
Gross Unrealized Losses (67,766)   (67,309)
Fair Value 320,114   328,106
Agency-collateralized mortgage obligations      
Available-for-sale debt securities      
Amortized Cost 18,365   19,304
Gross Unrealized Gains 47   27
Gross Unrealized Losses (137)   (132)
Fair Value 18,275   19,199
Debt securities carried at fair value:      
Fair Value 18,275    
Commercial      
Available-for-sale debt securities      
Amortized Cost 44,212   38,688
Gross Unrealized Gains 181   191
Gross Unrealized Losses (452)   (385)
Fair Value 43,941   38,494
Debt securities carried at fair value:      
Fair Value 43,953    
Non-agency residential      
Available-for-sale debt securities      
Amortized Cost 270   273
Gross Unrealized Gains 54   55
Gross Unrealized Losses (61)   (56)
Fair Value 263   $ 272
Debt securities carried at fair value:      
Fair Value $ 502    
Non-agency residential | Prime      
Debt securities:      
Available-for-sale securities, percent held by rating 27.00%   27.00%
Non-agency residential | Subprime      
Debt securities:      
Available-for-sale securities, percent held by rating 73.00%   73.00%
U.S. Treasury and government agencies      
Available-for-sale debt securities      
Amortized Cost $ 215,210   $ 250,065
Gross Unrealized Gains 103   390
Gross Unrealized Losses (866)   (621)
Fair Value 214,447   249,834
Debt securities carried at fair value:      
Fair Value 219,126    
Held-to-maturity debt securities      
Amortized Cost 121,252   121,242
Gross Unrealized Gains 0   0
Gross Unrealized Losses (12,640)   (12,225)
Fair Value 108,612   109,017
Non-U.S. securities      
Available-for-sale debt securities      
Amortized Cost 33,455   31,765
Gross Unrealized Gains 4   20
Gross Unrealized Losses (47)   (18)
Fair Value 33,412   31,767
Debt securities carried at fair value:      
Fair Value 45,899    
Other taxable securities      
Available-for-sale debt securities      
Amortized Cost 6,185   6,328
Gross Unrealized Gains 3   12
Gross Unrealized Losses (57)   (36)
Fair Value 6,131   6,304
Debt securities carried at fair value:      
Fair Value 6,135    
Held-to-maturity debt securities      
Amortized Cost 5,631   6,028
Gross Unrealized Gains 2   2
Gross Unrealized Losses (748)   (723)
Fair Value 4,885   5,307
Tax-exempt securities      
Available-for-sale debt securities      
Amortized Cost 9,203   7,948
Gross Unrealized Gains 14   15
Gross Unrealized Losses (169)   (176)
Fair Value 9,048   $ 7,787
Debt securities carried at fair value:      
Fair Value $ 9,048