v3.26.1
DERIVATIVES - Derivative Notionals (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Hedging instruments under ASC 815    
Derivatives    
Derivative notionals $ 599,984 $ 525,314
Hedging instruments under ASC 815 | Interest rate contracts    
Derivatives    
Derivative notionals 487,950 412,754
Hedging instruments under ASC 815 | Interest rate swaps    
Derivatives    
Derivative notionals 487,950 412,754
Hedging instruments under ASC 815 | Interest rate futures and forwards    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Interest rate contract options | Written    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Interest rate contract options | Purchased    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Foreign exchange contracts    
Derivatives    
Derivative notionals 102,497 101,458
Hedging instruments under ASC 815 | Foreign exchange swaps    
Derivatives    
Derivative notionals 42,600 42,205
Hedging instruments under ASC 815 | Foreign exchange futures, forwards and spot    
Derivatives    
Derivative notionals 59,897 59,253
Hedging instruments under ASC 815 | Foreign exchange contract options | Written    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Foreign exchange contract options | Purchased    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Equity contracts    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Equity swaps    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Equity futures and forwards    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Equity contract options | Written    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Equity contract options | Purchased    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Commodity and other contracts    
Derivatives    
Derivative notionals 9,537 11,102
Hedging instruments under ASC 815 | Commodity and other swaps    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Commodity and other futures and forwards    
Derivatives    
Derivative notionals 9,537 11,102
Hedging instruments under ASC 815 | Commodity and other contracts | Written    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Commodity and other contracts | Purchased    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Credit derivatives    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Credit derivatives | Written    
Derivatives    
Derivative notionals 0 0
Hedging instruments under ASC 815 | Credit derivatives | Purchased    
Derivatives    
Derivative notionals 0 0
Other derivative instruments, Trading derivatives    
Derivatives    
Derivative notionals 52,551,444 45,657,450
Other derivative instruments, Trading derivatives | Interest rate contracts    
Derivatives    
Derivative notionals 29,981,144 25,891,915
Other derivative instruments, Trading derivatives | Interest rate swaps    
Derivatives    
Derivative notionals 20,181,810 16,768,436
Other derivative instruments, Trading derivatives | Interest rate futures and forwards    
Derivatives    
Derivative notionals 3,466,154 3,219,583
Other derivative instruments, Trading derivatives | Interest rate contract options | Written    
Derivatives    
Derivative notionals 3,319,951 3,089,023
Other derivative instruments, Trading derivatives | Interest rate contract options | Purchased    
Derivatives    
Derivative notionals 3,013,229 2,814,873
Other derivative instruments, Trading derivatives | Foreign exchange contracts    
Derivatives    
Derivative notionals 18,360,857 16,152,379
Other derivative instruments, Trading derivatives | Foreign exchange swaps    
Derivatives    
Derivative notionals 9,705,386 9,307,564
Other derivative instruments, Trading derivatives | Foreign exchange futures, forwards and spot    
Derivatives    
Derivative notionals 6,324,018 5,108,296
Other derivative instruments, Trading derivatives | Foreign exchange contract options | Written    
Derivatives    
Derivative notionals 1,180,456 885,093
Other derivative instruments, Trading derivatives | Foreign exchange contract options | Purchased    
Derivatives    
Derivative notionals 1,150,997 851,426
Other derivative instruments, Trading derivatives | Equity contracts    
Derivatives    
Derivative notionals 2,581,958 2,091,408
Other derivative instruments, Trading derivatives | Equity swaps    
Derivatives    
Derivative notionals 594,187 520,623
Other derivative instruments, Trading derivatives | Equity futures and forwards    
Derivatives    
Derivative notionals 200,036 107,399
Other derivative instruments, Trading derivatives | Equity contract options | Written    
Derivatives    
Derivative notionals 983,596 809,293
Other derivative instruments, Trading derivatives | Equity contract options | Purchased    
Derivatives    
Derivative notionals 804,139 654,093
Other derivative instruments, Trading derivatives | Commodity and other contracts    
Derivatives    
Derivative notionals 500,545 446,191
Other derivative instruments, Trading derivatives | Commodity and other swaps    
Derivatives    
Derivative notionals 91,041 78,205
Other derivative instruments, Trading derivatives | Commodity and other futures and forwards    
Derivatives    
Derivative notionals 265,803 230,619
Other derivative instruments, Trading derivatives | Commodity and other contracts | Written    
Derivatives    
Derivative notionals 74,032 70,154
Other derivative instruments, Trading derivatives | Commodity and other contracts | Purchased    
Derivatives    
Derivative notionals 69,669 67,213
Other derivative instruments, Trading derivatives | Credit derivatives    
Derivatives    
Derivative notionals 1,126,940 1,075,557
Other derivative instruments, Trading derivatives | Credit derivatives | Written    
Derivatives    
Derivative notionals 502,462 475,228
Other derivative instruments, Trading derivatives | Credit derivatives | Purchased    
Derivatives    
Derivative notionals $ 624,478 $ 600,329