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Fair Value Measurement - Recurring Basis (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross $ 606,382 $ 665,587    
Derivative netting adjustments (548,605) (604,620)    
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables 57,777 60,967    
Trading assets 802,873 637,784    
Available-for-sale securities 507,198 406,852    
Loans 70,684 41,350    
Mortgage servicing rights 9,167 9,121 $ 8,522 $ 7,973
Derivative payables, gross 596,738 653,218    
Derivative netting adjustments (550,409) (613,557)    
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables 46,329 39,661    
Interest rate        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 281,884 290,734    
Derivative netting adjustments (256,483) (265,789)    
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables 25,401 24,945    
Derivative payables, gross 257,583 274,228    
Derivative netting adjustments (250,122) (264,989)    
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables 7,461 9,239    
Credit        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 13,024 11,087    
Derivative netting adjustments (12,545) (10,273)    
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables 479 814    
Derivative payables, gross 17,628 13,796    
Derivative netting adjustments (15,612) (11,898)    
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables 2,016 1,898    
Foreign exchange        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 183,236 262,920    
Derivative netting adjustments (163,881) (237,608)    
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables 19,355 25,312    
Derivative payables, gross 178,141 254,567    
Derivative netting adjustments (163,308) (238,970)    
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables 14,833 15,597    
Equity        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 97,723 85,220    
Derivative netting adjustments (91,856) (79,935)    
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables 5,867 5,285    
Derivative payables, gross 117,017 96,139    
Derivative netting adjustments (102,211) (87,491)    
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables 14,806 8,648    
Commodity        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 30,515 15,626    
Derivative netting adjustments (23,840) (11,015)    
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables 6,675 4,611    
Derivative payables, gross 26,369 14,488    
Derivative netting adjustments (19,156) (10,209)    
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables 7,213 4,279    
Total mortgage-backed securities        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities 101,447 100,769    
Mortgage-backed securities, Commercial - nonagency        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities 4,484 4,065    
U.S. Treasury, GSEs and government agencies        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities 315,822 234,779    
Obligations of U.S. states and municipalities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 6,100 6,100    
Available-for-sale securities 20,240 17,913    
Non-U.S. government debt securities        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities 45,655 36,245    
Corporate debt securities        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities 128 70    
Asset-backed securities        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities 23,906      
Asset-backed securities, collateralized loan obligations        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities 21,947 14,943    
Fair Value Measured at Net Asset Value Per Share        
Fair value assets and liabilities measured on recurring basis - supplemental data        
Alternative investments, net asset value, fair value 1,000 1,000    
Recurring        
Assets and liabilities measured at fair value on a recurring basis        
Federal funds sold and securities purchased under resale agreements 327,018 286,771    
Securities borrowed 98,111 83,962    
Trading assets, debt and equity instruments 745,096 576,817    
Derivative netting adjustments (548,605) (604,620)    
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables 57,777 60,967    
Trading assets 802,873 637,784    
Available-for-sale securities 507,198 406,852    
Loans 70,684 41,350    
Mortgage servicing rights 9,167 9,121    
Other assets 14,801 14,073    
Total assets measured at fair value 1,829,852 1,479,913    
Deposits 20,930 33,768    
Federal funds purchased and securities loaned or sold under repurchase agreements 360,194 226,329    
Short-term borrowings 32,460 26,521    
Trading liabilities, Debt and equity instruments 169,690 153,222    
Derivative netting adjustments (550,409) (613,557)    
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables 46,329 39,661    
Trading liabilities 216,019 192,883    
Accounts payable and other liabilities 6,660 5,893    
Beneficial interests issued by consolidated VIEs 5 1    
Long-term debt 134,559 100,780    
Total liabilities measured at fair value 770,827 586,175    
Recurring | Interest rate        
Assets and liabilities measured at fair value on a recurring basis        
Derivative netting adjustments (256,483) (265,789)    
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables 25,401 24,945    
Derivative netting adjustments (250,122) (264,989)    
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables 7,461 9,239    
Recurring | Credit        
Assets and liabilities measured at fair value on a recurring basis        
Derivative netting adjustments (12,545) (10,273)    
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables 479 814    
Derivative netting adjustments (15,612) (11,898)    
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables 2,016 1,898    
Recurring | Foreign exchange        
Assets and liabilities measured at fair value on a recurring basis        
Derivative netting adjustments (163,881) (237,608)    
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables 19,355 25,312    
Derivative netting adjustments (163,308) (238,970)    
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables 14,833 15,597    
Recurring | Equity        
Assets and liabilities measured at fair value on a recurring basis        
Derivative netting adjustments (91,856) (79,935)    
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables 5,867 5,285    
Derivative netting adjustments (102,211) (87,491)    
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables 14,806 8,648    
Recurring | Commodity        
Assets and liabilities measured at fair value on a recurring basis        
Derivative netting adjustments (23,840) (11,015)    
Total derivative receivables recognized on the Consolidated balance sheets, Net derivative receivables 6,675 4,611    
Derivative netting adjustments (19,156) (10,209)    
Total derivative payables recognized on the Consolidated balance sheets, Net derivative payables 7,213 4,279    
Recurring | Total debt instruments        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 600,573 417,428    
Recurring | Total mortgage-backed securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 162,085 108,380    
Available-for-sale securities 101,447 100,769    
Recurring | Mortgage-backed securities, U.S. GSEs and government agencies        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 158,141 104,800    
Available-for-sale securities 90,972 91,893    
Recurring | Mortgage-backed securities, Residential - nonagency        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 2,007 2,287    
Available-for-sale securities 5,991 4,811    
Recurring | Mortgage-backed securities, Commercial - nonagency        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 1,937 1,293    
Available-for-sale securities 4,484 4,065    
Recurring | U.S. Treasury, GSEs and government agencies        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 243,884 162,282    
Available-for-sale securities 315,822 234,779    
Recurring | Obligations of U.S. states and municipalities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 6,130 6,101    
Available-for-sale securities 20,240 17,913    
Recurring | Certificates of deposit, bankers’ acceptances and commercial paper        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 1,345 3,950    
Recurring | Non-U.S. government debt securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 124,684 88,595    
Available-for-sale securities 45,655 36,245    
Recurring | Corporate debt securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 45,507 33,981    
Available-for-sale securities 128 70    
Recurring | Loans        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 12,925 11,316    
Recurring | Asset-backed securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 4,013 2,823    
Recurring | Equity securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 109,876 131,728    
Recurring | Physical commodities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 21,857 7,516    
Recurring | Other        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 12,790 20,145    
Recurring | Asset-backed securities, collateralized loan obligations        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities 21,947 14,943    
Recurring | Asset-backed securities, other        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities 1,959 2,133    
Recurring | US GSE obligations        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 158,400 120,100    
Recurring | Level 1        
Assets and liabilities measured at fair value on a recurring basis        
Federal funds sold and securities purchased under resale agreements 0 0    
Securities borrowed 0 0    
Trading assets, debt and equity instruments 431,105 320,952    
Derivative receivables, gross 2,496 5,130    
Trading assets 433,601 326,082    
Available-for-sale securities 349,670 258,464    
Loans 0 0    
Mortgage servicing rights 0 0    
Other assets 6,864 5,732    
Total assets measured at fair value 790,135 590,278    
Deposits 0 0    
Federal funds purchased and securities loaned or sold under repurchase agreements 0 0    
Short-term borrowings 0 0    
Trading liabilities, Debt and equity instruments 135,366 120,719    
Derivative payables, gross 3,399 4,168    
Trading liabilities 138,765 124,887    
Accounts payable and other liabilities 3,967 3,100    
Beneficial interests issued by consolidated VIEs 0 0    
Long-term debt 0 0    
Total liabilities measured at fair value 142,732 127,987    
Recurring | Level 1 | Interest rate        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 1,579 4,934    
Derivative payables, gross 2,071 3,981    
Recurring | Level 1 | Credit        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 0 0    
Derivative payables, gross 0 0    
Recurring | Level 1 | Foreign exchange        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 111 196    
Derivative payables, gross 118 187    
Recurring | Level 1 | Equity        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 806 0    
Derivative payables, gross 1,210 0    
Recurring | Level 1 | Commodity        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 0 0    
Derivative payables, gross 0 0    
Recurring | Level 1 | Total debt instruments        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 302,640 184,688    
Recurring | Level 1 | Total mortgage-backed securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 0 0    
Available-for-sale securities 1 0    
Recurring | Level 1 | Mortgage-backed securities, U.S. GSEs and government agencies        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 0 0    
Available-for-sale securities 1 0    
Recurring | Level 1 | Mortgage-backed securities, Residential - nonagency        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 0 0    
Available-for-sale securities 0 0    
Recurring | Level 1 | Mortgage-backed securities, Commercial - nonagency        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 0 0    
Available-for-sale securities 0 0    
Recurring | Level 1 | U.S. Treasury, GSEs and government agencies        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 225,255 150,580    
Available-for-sale securities 315,361 234,491    
Recurring | Level 1 | Obligations of U.S. states and municipalities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 0 0    
Available-for-sale securities 0 0    
Recurring | Level 1 | Certificates of deposit, bankers’ acceptances and commercial paper        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 0 0    
Recurring | Level 1 | Non-U.S. government debt securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 77,385 34,108    
Available-for-sale securities 34,308 23,973    
Recurring | Level 1 | Corporate debt securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 0 0    
Available-for-sale securities 0 0    
Recurring | Level 1 | Loans        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 0 0    
Recurring | Level 1 | Asset-backed securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 0 0    
Recurring | Level 1 | Equity securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 107,585 130,307    
Recurring | Level 1 | Physical commodities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 20,880 5,957    
Recurring | Level 1 | Other        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 0 0    
Recurring | Level 1 | Asset-backed securities, collateralized loan obligations        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities 0 0    
Recurring | Level 1 | Asset-backed securities, other        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities 0 0    
Recurring | Level 2        
Assets and liabilities measured at fair value on a recurring basis        
Federal funds sold and securities purchased under resale agreements 327,018 286,771    
Securities borrowed 98,111 83,962    
Trading assets, debt and equity instruments 311,197 253,423    
Derivative receivables, gross 594,960 652,005    
Trading assets 906,157 905,428    
Available-for-sale securities 157,417 148,380    
Loans 67,622 38,934    
Mortgage servicing rights 0 0    
Other assets 6,890 6,997    
Total assets measured at fair value 1,563,215 1,470,472    
Deposits 18,574 31,583    
Federal funds purchased and securities loaned or sold under repurchase agreements 360,194 226,329    
Short-term borrowings 26,902 23,045    
Trading liabilities, Debt and equity instruments 33,998 32,457    
Derivative payables, gross 581,336 637,617    
Trading liabilities 615,334 670,074    
Accounts payable and other liabilities 2,655 2,717    
Beneficial interests issued by consolidated VIEs 5 1    
Long-term debt 87,886 66,216    
Total liabilities measured at fair value 1,111,550 1,019,965    
Recurring | Level 2 | Interest rate        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 276,565 282,019    
Derivative payables, gross 253,078 266,767    
Recurring | Level 2 | Credit        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 12,018 10,379    
Derivative payables, gross 15,487 12,725    
Recurring | Level 2 | Foreign exchange        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 181,318 261,520    
Derivative payables, gross 176,521 253,196    
Recurring | Level 2 | Equity        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 95,098 82,855    
Derivative payables, gross 110,451 90,908    
Recurring | Level 2 | Commodity        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 29,961 15,232    
Derivative payables, gross 25,799 14,021    
Recurring | Level 2 | Total debt instruments        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 295,751 230,596    
Recurring | Level 2 | Total mortgage-backed securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 161,773 107,877    
Available-for-sale securities 101,443 100,761    
Recurring | Level 2 | Mortgage-backed securities, U.S. GSEs and government agencies        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 157,834 104,312    
Available-for-sale securities 90,971 91,893    
Recurring | Level 2 | Mortgage-backed securities, Residential - nonagency        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 2,002 2,282    
Available-for-sale securities 5,991 4,811    
Recurring | Level 2 | Mortgage-backed securities, Commercial - nonagency        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 1,937 1,283    
Available-for-sale securities 4,481 4,057    
Recurring | Level 2 | U.S. Treasury, GSEs and government agencies        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 18,629 11,702    
Available-for-sale securities 461 288    
Recurring | Level 2 | Obligations of U.S. states and municipalities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 6,129 6,100    
Available-for-sale securities 20,240 17,913    
Recurring | Level 2 | Certificates of deposit, bankers’ acceptances and commercial paper        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 1,345 3,950    
Recurring | Level 2 | Non-U.S. government debt securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 47,054 54,335    
Available-for-sale securities 11,347 12,272    
Recurring | Level 2 | Corporate debt securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 45,053 33,591    
Available-for-sale securities 20 70    
Recurring | Level 2 | Loans        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 11,782 10,228    
Recurring | Level 2 | Asset-backed securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 3,986 2,813    
Recurring | Level 2 | Equity securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 2,153 1,359    
Recurring | Level 2 | Physical commodities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 947 1,533    
Recurring | Level 2 | Other        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 12,346 19,935    
Recurring | Level 2 | Asset-backed securities, collateralized loan obligations        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities 21,947 14,943    
Recurring | Level 2 | Asset-backed securities, other        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities 1,959 2,133    
Recurring | Level 3        
Assets and liabilities measured at fair value on a recurring basis        
Federal funds sold and securities purchased under resale agreements 0 0    
Securities borrowed 0 0    
Trading assets, debt and equity instruments 2,794 2,442    
Derivative receivables, gross 8,926 8,452    
Trading assets 11,720 10,894    
Available-for-sale securities 111 8    
Loans 3,062 2,416    
Mortgage servicing rights 9,167 9,121    
Other assets 1,047 1,344    
Total assets measured at fair value 25,107 23,783    
Deposits 2,356 2,185    
Federal funds purchased and securities loaned or sold under repurchase agreements 0 0    
Short-term borrowings 5,558 3,476    
Trading liabilities, Debt and equity instruments 326 46    
Derivative payables, gross 12,003 11,433    
Trading liabilities 12,329 11,479    
Accounts payable and other liabilities 38 76    
Beneficial interests issued by consolidated VIEs 0 0    
Long-term debt 46,673 34,564    
Total liabilities measured at fair value 66,954 51,780    
Recurring | Level 3 | Interest rate        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 3,740 3,781    
Derivative payables, gross 2,434 3,480    
Recurring | Level 3 | Credit        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 1,006 708    
Derivative payables, gross 2,141 1,071    
Recurring | Level 3 | Foreign exchange        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 1,807 1,204    
Derivative payables, gross 1,502 1,184    
Recurring | Level 3 | Equity        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 1,819 2,365    
Derivative payables, gross 5,356 5,231    
Recurring | Level 3 | Commodity        
Assets and liabilities measured at fair value on a recurring basis        
Derivative receivables, gross 554 394    
Derivative payables, gross 570 467    
Recurring | Level 3 | Total debt instruments        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 2,182 2,144    
Recurring | Level 3 | Total mortgage-backed securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 312 503    
Available-for-sale securities 3 8    
Recurring | Level 3 | Mortgage-backed securities, U.S. GSEs and government agencies        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 307 488    
Available-for-sale securities 0 0    
Recurring | Level 3 | Mortgage-backed securities, Residential - nonagency        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 5 5    
Available-for-sale securities 0 0    
Recurring | Level 3 | Mortgage-backed securities, Commercial - nonagency        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 0 10    
Available-for-sale securities 3 8    
Recurring | Level 3 | U.S. Treasury, GSEs and government agencies        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 0 0    
Available-for-sale securities 0 0    
Recurring | Level 3 | Obligations of U.S. states and municipalities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 1 1    
Available-for-sale securities 0 0    
Recurring | Level 3 | Certificates of deposit, bankers’ acceptances and commercial paper        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 0 0    
Recurring | Level 3 | Non-U.S. government debt securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 245 152    
Available-for-sale securities 0 0    
Recurring | Level 3 | Corporate debt securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 454 390    
Available-for-sale securities 108 0    
Recurring | Level 3 | Loans        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 1,143 1,088    
Recurring | Level 3 | Asset-backed securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 27 10    
Recurring | Level 3 | Equity securities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 138 62    
Recurring | Level 3 | Physical commodities        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 30 26    
Recurring | Level 3 | Other        
Assets and liabilities measured at fair value on a recurring basis        
Trading assets, debt and equity instruments 444 210    
Recurring | Level 3 | Asset-backed securities, collateralized loan obligations        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities 0 0    
Recurring | Level 3 | Asset-backed securities, other        
Assets and liabilities measured at fair value on a recurring basis        
Available-for-sale securities $ 0 $ 0