Quarterly report [Sections 13 or 15(d)]

Securities - Debt Securities (Details)

v3.25.3
Securities - Debt Securities (Details) - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Available-for-sale debt securities    
Amortized Cost $ 393,024 $ 349,928
Gross Unrealized Gains 467 364
Gross Unrealized Losses (3,198) (3,860)
Fair Value 390,293 346,432
Other Debt Securities, Carried at Fair Value:    
Amortized Cost 14,272 12,352
Gross Unrealized Gains 162 59
Gross Unrealized Losses (91) (236)
Fair Value 14,343 12,175
Debt securities carried at fair value:    
Amortized Cost 407,296 362,280
Gross Unrealized Gains 629 423
Gross Unrealized Losses (3,289) (4,096)
Fair Value 404,636 358,607
Held-to-maturity debt securities    
Amortized Cost 531,449 558,713
Gross Unrealized Gains 2 1
Gross Unrealized Losses (84,907) (108,166)
Fair Value 446,544 450,548
Debt securities:    
Amortized Cost 938,745 920,993
Gross Unrealized Gains 631 424
Gross Unrealized Losses (88,196) (112,262)
Fair Value 851,180 809,155
Securities, pledged as collateral $ 165,400 $ 184,600
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 $ 246,200 $ 260,900
Fair Value 205,000 209,600
FHLMC    
Debt securities carried at fair value:    
Amortized Cost 157,600 169,000
Fair Value 131,400 136,500
Mortgage-backed securities    
Available-for-sale debt securities    
Amortized Cost 86,336 78,619
Gross Unrealized Gains 195 175
Gross Unrealized Losses (2,011) (2,387)
Fair Value 84,520 76,407
Debt securities carried at fair value:    
Fair Value 84,784  
Agency    
Available-for-sale debt securities    
Amortized Cost 33,308 32,781
Gross Unrealized Gains 15 35
Gross Unrealized Losses (1,383) (1,614)
Fair Value 31,940 31,202
Debt securities carried at fair value:    
Fair Value 31,940  
Held-to-maturity debt securities    
Amortized Cost 403,854 430,135
Gross Unrealized Gains 0 0
Gross Unrealized Losses (71,037) (88,458)
Fair Value 332,817 341,677
Agency-collateralized mortgage obligations    
Available-for-sale debt securities    
Amortized Cost 20,418 19,519
Gross Unrealized Gains 14 17
Gross Unrealized Losses (150) (218)
Fair Value 20,282 19,318
Debt securities carried at fair value:    
Fair Value 20,282  
Commercial    
Available-for-sale debt securities    
Amortized Cost 32,335 26,032
Gross Unrealized Gains 112 73
Gross Unrealized Losses (424) (503)
Fair Value 32,023 25,602
Debt securities carried at fair value:    
Fair Value 32,034  
Non-agency residential    
Available-for-sale debt securities    
Amortized Cost 275 287
Gross Unrealized Gains 54 50
Gross Unrealized Losses (54) (52)
Fair Value 275 $ 285
Debt securities carried at fair value:    
Fair Value $ 528  
Non-agency residential | Prime    
Debt securities:    
Available-for-sale securities, percent held by rating 26.00% 25.00%
Non-agency residential | Subprime    
Debt securities:    
Available-for-sale securities, percent held by rating 74.00% 75.00%
U.S. Treasury and government agencies    
Available-for-sale debt securities    
Amortized Cost $ 267,405 $ 235,582
Gross Unrealized Gains 198 150
Gross Unrealized Losses (970) (1,153)
Fair Value 266,633 234,579
Debt securities carried at fair value:    
Fair Value 269,077  
Held-to-maturity debt securities    
Amortized Cost 121,232 121,696
Gross Unrealized Gains 0 0
Gross Unrealized Losses (13,093) (18,661)
Fair Value 108,139 103,035
Non-U.S. securities    
Available-for-sale debt securities    
Amortized Cost 28,045 22,453
Gross Unrealized Gains 45 20
Gross Unrealized Losses (13) (42)
Fair Value 28,077 22,431
Debt securities carried at fair value:    
Fair Value 39,709  
Other taxable securities    
Available-for-sale debt securities    
Amortized Cost 3,093 4,646
Gross Unrealized Gains 10 2
Gross Unrealized Losses (29) (45)
Fair Value 3,074 4,603
Debt securities carried at fair value:    
Fair Value 3,077  
Held-to-maturity debt securities    
Amortized Cost 6,363 6,882
Gross Unrealized Gains 2 1
Gross Unrealized Losses (777) (1,047)
Fair Value 5,588 5,836
Tax-exempt securities    
Available-for-sale debt securities    
Amortized Cost 8,145 8,628
Gross Unrealized Gains 19 17
Gross Unrealized Losses (175) (233)
Fair Value 7,989 $ 8,412
Debt securities carried at fair value:    
Fair Value $ 7,989