v3.26.1
Investment securities - Amortized Cost, Gross Unrealized Gains and Losses and Fair Value (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Available-for-sale:    
Amortized cost $ 108,103 $ 102,422
Gains 190 507
Losses 893 823
Fair value 107,400 102,106
Amortized cost, before Portfolio level basis adjustment 108,259 102,421
Gross unrealized gains, before portfolio level basis adjustments   508
Gross unrealized losses, before portfolio level basis adjustments 1,049  
Portfolio level basis adjustment, excluded from amortized cost (156) 1
Portfolio level basis adjustments, gross unrealized gains (losses) 156 (1)
Held-to-maturity:    
Amortized cost 48,256 48,094
Gains 23 95
Losses 2,962 2,812
Fair value 45,317 45,377
Amortized cost, Total 156,359 150,516
Gross unrealized, Gain, Total 213 602
Gross unrealized, Losses, Total 3,855 3,635
Fair value, Total 152,717 147,483
Non-U.S. government    
Available-for-sale:    
Amortized cost 27,778 28,593
Gains 46 122
Losses 160 147
Fair value 27,664 28,568
Held-to-maturity:    
Amortized cost 5,273 5,654
Gains 4 22
Losses 30 20
Fair value 5,247 5,656
Agency residential mortgage-backed securities (“RMBS”)    
Available-for-sale:    
Amortized cost 23,250 21,261
Gains 74 202
Losses 369 243
Fair value 22,955 21,220
Held-to-maturity:    
Amortized cost 29,099 26,432
Gains 16 48
Losses 2,475 2,317
Fair value 26,640 24,163
U.S. Treasury    
Available-for-sale:    
Amortized cost 29,994 25,621
Gains 28 115
Losses 130 25
Fair value 29,892 25,711
Held-to-maturity:    
Amortized cost 6,123 7,830
Gains 0 18
Losses 164 173
Fair value 5,959 7,675
Foreign covered bonds    
Available-for-sale:    
Amortized cost 7,906 8,088
Gains 18 37
Losses 39 57
Fair value 7,885 8,068
Held-to-maturity:    
Amortized cost 688 736
Gains 0 2
Losses 2 0
Fair value 686 738
Agency commercial mortgage-backed securities (“MBS”)    
Available-for-sale:    
Amortized cost 6,770 6,891
Gains 10 12
Losses 121 123
Fair value 6,659 6,780
Held-to-maturity:    
Amortized cost 2,707 2,937
Gains 1 3
Losses 114 120
Fair value 2,594 2,820
Collateralized loan obligations (“CLOs”)    
Available-for-sale:    
Amortized cost 7,000 6,117
Gains 5 4
Losses 2 3
Fair value 7,003 6,118
Held-to-maturity:    
Amortized cost 1,842 1,841
Gains 2 2
Losses 1 3
Fair value 1,843 1,840
Non-agency commercial MBS    
Available-for-sale:    
Amortized cost 2,049 2,280
Gains 1 1
Losses 83 85
Fair value 1,967 2,196
U.S. government agencies    
Available-for-sale:    
Amortized cost 1,534 1,542
Gains 7 12
Losses 3 0
Fair value 1,538 1,554
Held-to-maturity:    
Amortized cost 2,513 2,653
Gains 0 0
Losses 176 178
Fair value 2,337 2,475
Non-agency RMBS    
Available-for-sale:    
Amortized cost 1,644 1,631
Gains 1 2
Losses 121 118
Fair value 1,524 1,515
Other asset-backed securities (“ABS”)    
Available-for-sale:    
Amortized cost 334 397
Gains 0 1
Losses 21 22
Fair value 313 376
Other debt securities    
Held-to-maturity:    
Amortized cost 11 11
Gains 0 0
Losses 0 1
Fair value $ 11 $ 10