v3.26.1
FAIR VALUE MEASUREMENT - Items Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Assets, Fair Value Disclosure [Abstract]    
Federal funds sold and securities borrowed and purchased under agreements to resell, Netting $ (377,622) $ (388,227)
Trading account assets 634,356 537,139
Netting agreements (442,830) (406,408)
Netting of cash collateral received (26,027) (27,471)
Trading derivatives 66,046 55,434
Investments 462,921 444,229
Held at fair value 8,230 6,855
Liabilities, Fair Value Disclosure [Abstract]    
Federal funds purchased and securities loaned and sold under agreements to repurchase, Netting (377,622) (388,227)
Netting agreements (442,830) (406,408)
Netting of cash collateral paid (20,458) (20,629)
Total derivative liabilities 64,577 58,214
Fair Value Measured at Net Asset Value Per Share    
Liabilities, Fair Value Disclosure [Abstract]    
Investments measured at net asset value excluded from Level 3 45 37
Recurring    
Assets, Fair Value Disclosure [Abstract]    
Federal funds sold and securities borrowed and purchased under agreements to resell 583,767 591,149
Federal funds sold and securities borrowed and purchased under agreements to resell, Netting (369,056) (385,039)
Federal funds sold and securities borrowed and purchased under agreements to resell 214,711 206,110
Investments 287,258 247,604
Held at fair value 8,230 6,855
Mortgage servicing rights 788 759
Assets before netting 2,000,100 1,834,066
Netting, Assets, total of netting agreements and cash collateral received (837,913) (818,918)
Total assets 1,162,187 1,015,148
Liabilities, Fair Value Disclosure [Abstract]    
Interest-bearing deposits 4,873 4,222
Federal funds purchased and securities loaned and sold under agreements to repurchase, Gross 371,096 427,036
Federal funds purchased and securities loaned and sold under agreements to repurchase, Netting (220,475) (227,614)
Federal funds purchased and securities loaned and sold under agreements to repurchase 150,621 199,422
Securities sold, not yet purchased 122,606 104,574
Trading liabilities 122,616 104,584
Short-term borrowings 27,017 21,567
Long-term debt 143,494 130,726
Total liabilities, Gross 1,200,171 1,178,878
Total liabilities, Netting (683,763) (654,651)
Total liabilities 516,408 524,227
Recurring | Trading account liabilities    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 527,865 485,251
Total trading derivatives and cash collateral, liability 527,865 485,251
Netting agreements (442,830) (406,408)
Netting of cash collateral paid (20,458) (20,629)
Netting, Liabilities, total of netting agreements and cash collateral received (463,288) (427,037)
Total derivative liabilities 64,577 58,214
Recurring | Trading account liabilities | Interest rate contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 194,063 217,372
Recurring | Trading account liabilities | Foreign exchange contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 185,527 152,864
Recurring | Trading account liabilities | Equity contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 112,996 79,201
Recurring | Trading account liabilities | Commodity contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 25,324 24,582
Recurring | Trading account liabilities | Credit derivatives    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 9,955 11,232
Recurring | Other financial liabilities measured on a recurring basis    
Liabilities, Fair Value Disclosure [Abstract]    
Netting of cash collateral paid   0
Non-trading derivatives and other financial liabilities measured on a recurring basis, gross 3,210 5,492
Total other assets and cash collateral, gross 3,210 5,492
Recurring | Other trading liabilities    
Liabilities, Fair Value Disclosure [Abstract]    
Trading liabilities 10 10
Recurring | Mortgage-backed securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 99,416 94,005
Investments 55,756 37,732
Recurring | Mortgage securitizations - U.S. agency-sponsored    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 97,158 92,456
Investments 54,777 36,756
Recurring | Residential    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 1,336 897
Investments 979 976
Recurring | Commercial    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 922 652
Recurring | U.S. Treasury and federal agency securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 158,671 143,722
Investments 53,492 35,465
Recurring | State and municipal    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 168 172
Investments 1,416 1,537
Recurring | Foreign government    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 153,397 123,391
Investments 167,817 163,107
Recurring | Corporate    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 27,952 21,843
Investments 3,618 4,691
Recurring | Equity securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 97,933 70,383
Investments 113 475
Recurring | Asset-backed securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 2,055 2,533
Investments 1,063 1,073
Recurring | Other debt securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 28,718 25,656
Investments 3,603 3,115
Recurring | Non-marketable equity securities    
Assets, Fair Value Disclosure [Abstract]    
Investments 380 409
Recurring | Trading mortgage-backed securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 568,310 481,705
Recurring | Trading account derivatives    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 534,903 489,313
Trading derivative, asset, gross net cash collateral paid 534,903 489,313
Netting agreements (442,830) (406,408)
Netting of cash collateral received (26,027) (27,471)
Total trading derivatives, netting (468,857) (433,879)
Trading derivatives 66,046 55,434
Recurring | Trading account derivatives | Interest rate contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 203,085 225,911
Recurring | Trading account derivatives | Foreign exchange contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 202,803 161,684
Recurring | Trading account derivatives | Equity contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 98,234 69,307
Recurring | Trading account derivatives | Commodity contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 20,798 22,688
Recurring | Trading account derivatives | Credit derivatives    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 9,983 9,723
Recurring | Other financial assets    
Assets, Fair Value Disclosure [Abstract]    
Total trading derivatives, netting   0
Total other assets and cash collateral, gross 16,844 16,681
Other assets 16,844 16,681
Recurring | Level 1    
Assets, Fair Value Disclosure [Abstract]    
Federal funds sold and securities borrowed and purchased under agreements to resell 0 485
Investments 139,980 119,112
Held at fair value 0 0
Mortgage servicing rights 0 0
Assets before netting $ 495,370 $ 395,551
Total as a percentage of gross assets 24.80% 21.50%
Liabilities, Fair Value Disclosure [Abstract]    
Interest-bearing deposits $ 0 $ 0
Federal funds purchased and securities loaned and sold under agreements to repurchase, Gross 0 0
Securities sold, not yet purchased 104,223 89,352
Trading liabilities 104,223 89,352
Short-term borrowings 0 0
Long-term debt 0 0
Total liabilities, Gross $ 107,392 $ 94,843
Total as a percentage of gross liabilities 8.90% 8.00%
Recurring | Level 1 | Trading account liabilities    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability $ 162 $ 54
Recurring | Level 1 | Trading account liabilities | Interest rate contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 48 5
Recurring | Level 1 | Trading account liabilities | Foreign exchange contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 0 0
Recurring | Level 1 | Trading account liabilities | Equity contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 114 49
Recurring | Level 1 | Trading account liabilities | Commodity contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 0 0
Recurring | Level 1 | Trading account liabilities | Credit derivatives    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 0 0
Recurring | Level 1 | Other financial liabilities measured on a recurring basis    
Liabilities, Fair Value Disclosure [Abstract]    
Other liabilities, gross 3,007 5,437
Recurring | Level 1 | Other trading liabilities    
Liabilities, Fair Value Disclosure [Abstract]    
Trading liabilities 0 0
Recurring | Level 1 | Mortgage-backed securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 0 0
Investments 0 0
Recurring | Level 1 | Mortgage securitizations - U.S. agency-sponsored    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 0 0
Investments 0 0
Recurring | Level 1 | Residential    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 0 0
Investments 0 0
Recurring | Level 1 | Commercial    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 0 0
Recurring | Level 1 | U.S. Treasury and federal agency securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 151,293 140,671
Investments 53,492 35,465
Recurring | Level 1 | State and municipal    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 0 0
Investments 0 0
Recurring | Level 1 | Foreign government    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 104,816 65,966
Investments 84,002 80,048
Recurring | Level 1 | Corporate    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 2,737 1,161
Investments 2,379 3,193
Recurring | Level 1 | Equity securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 90,766 61,986
Investments 107 342
Recurring | Level 1 | Asset-backed securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 0 0
Investments 0 0
Recurring | Level 1 | Other debt securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 0 0
Investments 0 64
Recurring | Level 1 | Non-marketable equity securities    
Assets, Fair Value Disclosure [Abstract]    
Investments 0 0
Recurring | Level 1 | Trading mortgage-backed securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 349,612 269,784
Recurring | Level 1 | Trading account derivatives    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 121 40
Recurring | Level 1 | Trading account derivatives | Interest rate contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 13 9
Recurring | Level 1 | Trading account derivatives | Foreign exchange contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 0 0
Recurring | Level 1 | Trading account derivatives | Equity contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 108 31
Recurring | Level 1 | Trading account derivatives | Commodity contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 0 0
Recurring | Level 1 | Trading account derivatives | Credit derivatives    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 0 0
Recurring | Level 1 | Other financial assets    
Assets, Fair Value Disclosure [Abstract]    
Other assets, gross 5,657 6,130
Recurring | Level 2    
Assets, Fair Value Disclosure [Abstract]    
Federal funds sold and securities borrowed and purchased under agreements to resell 583,720 590,615
Investments 146,232 127,076
Held at fair value 8,079 6,733
Mortgage servicing rights 0 0
Assets before netting $ 1,494,412 $ 1,427,986
Total as a percentage of gross assets 74.70% 77.90%
Liabilities, Fair Value Disclosure [Abstract]    
Interest-bearing deposits $ 4,653 $ 3,983
Federal funds purchased and securities loaned and sold under agreements to repurchase, Gross 370,197 426,084
Securities sold, not yet purchased 18,275 15,177
Trading liabilities 18,285 15,187
Short-term borrowings 26,770 21,275
Long-term debt 117,743 106,767
Total liabilities, Gross $ 1,055,566 $ 1,048,863
Total as a percentage of gross liabilities 88.00% 89.00%
Recurring | Level 2 | Trading account liabilities    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability $ 517,715 $ 475,512
Recurring | Level 2 | Trading account liabilities | Interest rate contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 191,736 215,562
Recurring | Level 2 | Trading account liabilities | Foreign exchange contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 184,866 152,202
Recurring | Level 2 | Trading account liabilities | Equity contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 108,309 74,365
Recurring | Level 2 | Trading account liabilities | Commodity contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 23,984 23,713
Recurring | Level 2 | Trading account liabilities | Credit derivatives    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 8,820 9,670
Recurring | Level 2 | Other financial liabilities measured on a recurring basis    
Liabilities, Fair Value Disclosure [Abstract]    
Other liabilities, gross 203 55
Recurring | Level 2 | Other trading liabilities    
Liabilities, Fair Value Disclosure [Abstract]    
Trading liabilities 10 10
Recurring | Level 2 | Mortgage-backed securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 98,771 93,469
Investments 55,724 37,701
Recurring | Level 2 | Mortgage securitizations - U.S. agency-sponsored    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 96,675 92,074
Investments 54,745 36,725
Recurring | Level 2 | Residential    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 1,244 798
Investments 979 976
Recurring | Level 2 | Commercial    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 852 597
Recurring | Level 2 | U.S. Treasury and federal agency securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 7,378 3,051
Investments 0 0
Recurring | Level 2 | State and municipal    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 167 171
Investments 1,025 1,033
Recurring | Level 2 | Foreign government    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 48,562 57,390
Investments 83,812 83,034
Recurring | Level 2 | Corporate    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 25,089 20,412
Investments 1,002 1,183
Recurring | Level 2 | Equity securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 6,752 8,110
Investments 3 2
Recurring | Level 2 | Asset-backed securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 1,781 2,308
Investments 1,063 1,072
Recurring | Level 2 | Other debt securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 28,373 25,243
Investments 3,603 3,051
Recurring | Level 2 | Non-marketable equity securities    
Assets, Fair Value Disclosure [Abstract]    
Investments 0 0
Recurring | Level 2 | Trading mortgage-backed securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 216,873 210,154
Recurring | Level 2 | Trading account derivatives    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 528,321 482,857
Recurring | Level 2 | Trading account derivatives | Interest rate contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 200,453 224,077
Recurring | Level 2 | Trading account derivatives | Foreign exchange contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 202,207 161,072
Recurring | Level 2 | Trading account derivatives | Equity contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 96,954 67,453
Recurring | Level 2 | Trading account derivatives | Commodity contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 19,503 21,675
Recurring | Level 2 | Trading account derivatives | Credit derivatives    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 9,204 8,580
Recurring | Level 2 | Other financial assets    
Assets, Fair Value Disclosure [Abstract]    
Other assets, gross 11,187 10,551
Recurring | Level 3    
Assets, Fair Value Disclosure [Abstract]    
Federal funds sold and securities borrowed and purchased under agreements to resell 47 49
Investments 1,046 1,416
Held at fair value 151 122
Mortgage servicing rights 788 759
Assets before netting $ 10,318 $ 10,529
Total as a percentage of gross assets 0.50% 0.60%
Liabilities, Fair Value Disclosure [Abstract]    
Interest-bearing deposits $ 220 $ 239
Federal funds purchased and securities loaned and sold under agreements to repurchase, Gross 899 952
Securities sold, not yet purchased 108 45
Trading liabilities 108 45
Short-term borrowings 247 292
Long-term debt 25,751 23,959
Total liabilities, Gross $ 37,213 $ 35,172
Total as a percentage of gross liabilities 3.10% 3.00%
Recurring | Level 3 | Trading account liabilities    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability $ 9,988 $ 9,685
Recurring | Level 3 | Trading account liabilities | Interest rate contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 2,279 1,805
Recurring | Level 3 | Trading account liabilities | Foreign exchange contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 661 662
Recurring | Level 3 | Trading account liabilities | Equity contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 4,573 4,787
Recurring | Level 3 | Trading account liabilities | Commodity contracts    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 1,340 869
Recurring | Level 3 | Trading account liabilities | Credit derivatives    
Liabilities, Fair Value Disclosure [Abstract]    
Trading derivatives, liability 1,135 1,562
Recurring | Level 3 | Other financial liabilities measured on a recurring basis    
Liabilities, Fair Value Disclosure [Abstract]    
Other liabilities, gross 0 0
Recurring | Level 3 | Other trading liabilities    
Liabilities, Fair Value Disclosure [Abstract]    
Trading liabilities 0 0
Recurring | Level 3 | Mortgage-backed securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 645 536
Investments 32 31
Recurring | Level 3 | Mortgage securitizations - U.S. agency-sponsored    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 483 382
Investments 32 31
Recurring | Level 3 | Residential    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 92 99
Investments 0 0
Recurring | Level 3 | Commercial    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 70 55
Recurring | Level 3 | U.S. Treasury and federal agency securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 0 0
Investments 0 0
Recurring | Level 3 | State and municipal    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 1 1
Investments 391 504
Recurring | Level 3 | Foreign government    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 19 35
Investments 3 25
Recurring | Level 3 | Corporate    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 126 270
Investments 237 315
Recurring | Level 3 | Equity securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 415 287
Investments 3 131
Recurring | Level 3 | Asset-backed securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 274 225
Investments 0 1
Recurring | Level 3 | Other debt securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 345 413
Investments 0 0
Recurring | Level 3 | Non-marketable equity securities    
Assets, Fair Value Disclosure [Abstract]    
Investments 380 409
Recurring | Level 3 | Trading mortgage-backed securities    
Assets, Fair Value Disclosure [Abstract]    
Trading account assets 1,825 1,767
Recurring | Level 3 | Trading account derivatives    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 6,461 6,416
Recurring | Level 3 | Trading account derivatives | Interest rate contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 2,619 1,825
Recurring | Level 3 | Trading account derivatives | Foreign exchange contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 596 612
Recurring | Level 3 | Trading account derivatives | Equity contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 1,172 1,823
Recurring | Level 3 | Trading account derivatives | Commodity contracts    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 1,295 1,013
Recurring | Level 3 | Trading account derivatives | Credit derivatives    
Assets, Fair Value Disclosure [Abstract]    
Trading derivatives, asset, Gross 779 1,143
Recurring | Level 3 | Other financial assets    
Assets, Fair Value Disclosure [Abstract]    
Other assets, gross $ 0 $ 0