v3.26.1
Investment Securities (Summary) (Details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Securities Available-for-Sale    
Total $ 73,207 $ 69,897
Unrealized gains 404 621
Unrealized losses (2,511) (2,383)
Fair Value 71,100 68,135
Securities Held-to-Maturity    
Total 78,406 70,105
Unrealized gains 208 403
Unrealized losses (3,092) (2,529)
Fair Value 75,522 67,979
Accrued interest, held-to-maturity 246 219
Accrued interest, available-for-sale 335 348
Debt securities, available for sale, allowance for credit loss 61 61
Debt securities, held to maturity, allowance for credit loss 4 5
Net unrealized losses, related to securities transferred at fair value to held to maturity at a point in time $ 2,400 $ 2,700
Fitch, AAA OR AA Rating | Credit Concentration Risk | Investments    
Securities Held-to-Maturity    
Concentration risk, percentage 97.00% 97.00%
U.S. Treasury and government agencies    
Securities Available-for-Sale    
Total $ 28,804 $ 29,022
Unrealized gains 72 188
Unrealized losses (351) (313)
Fair Value 28,525 28,897
Securities Held-to-Maturity    
Total 18,666 21,537
Unrealized gains 2 25
Unrealized losses (385) (318)
Fair Value 18,283 21,244
Residential mortgage-backed agency    
Securities Available-for-Sale    
Total 35,794 32,429
Unrealized gains 119 176
Unrealized losses (2,025) (1,942)
Fair Value 33,888 30,663
Securities Held-to-Maturity    
Total 51,294 42,599
Unrealized gains 155 279
Unrealized losses (2,588) (2,155)
Fair Value 48,861 40,723
Residential mortgage- backed non-agency    
Securities Available-for-Sale    
Total 417 442
Unrealized gains 104 110
Unrealized losses (4) (4)
Fair Value 517 548
Securities Held-to-Maturity    
Total 213 222
Unrealized gains 0 0
Unrealized losses (13) (11)
Fair Value 200 211
Commercial mortgage-backed agency    
Securities Available-for-Sale    
Total 3,416 3,395
Unrealized gains 20 43
Unrealized losses (75) (66)
Fair Value 3,361 3,372
Securities Held-to-Maturity    
Total 4,545 1,091
Unrealized gains 8 16
Unrealized losses (72) (7)
Fair Value 4,481 1,100
Commercial mortgage- backed non-agency    
Securities Available-for-Sale    
Total 160 256
Unrealized gains 0 0
Unrealized losses (2) (4)
Fair Value 158 252
Securities Held-to-Maturity    
Total 150 328
Unrealized gains 3 3
Unrealized losses 0 (1)
Fair Value 153 330
Asset-backed    
Securities Available-for-Sale    
Total 2,521 2,247
Unrealized gains 31 50
Unrealized losses (3) 0
Fair Value 2,549 2,297
Securities Held-to-Maturity    
Total 1,130 1,840
Unrealized gains 11 46
Unrealized losses (7) (6)
Fair Value 1,134 1,880
Other    
Securities Available-for-Sale    
Total 2,095 2,106
Unrealized gains 58 54
Unrealized losses (51) (54)
Fair Value 2,102 2,106
Securities Held-to-Maturity    
Total 2,408 2,488
Unrealized gains 29 34
Unrealized losses (27) (31)
Fair Value $ 2,410 $ 2,491