v3.26.1
FAIR VALUE MEASUREMENT - Estimate Fair Value of Financial Instruments Not Carried at Fair Value (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Assets            
Loans $ 8,230   $ 6,855      
Liabilities            
Deposits 1,492,607   1,403,573      
Investments 462,921   444,229      
Allowance for credit losses 19,961 $ 19,636 19,247 $ 19,123 $ 18,726 $ 18,574
Loans, net of unearned income 793,658   752,230      
Corporate loans            
Assets            
Loans 8,204   6,804      
Liabilities            
Allowance for credit losses 3,451 $ 3,339 3,053 $ 3,023 $ 2,725 $ 2,556
Loans, net of unearned income 377,138   343,697      
Lease financing            
Liabilities            
Loans, net of unearned income 100   100      
Carrying value            
Assets            
HTM debt securities, net of allowance(1) 173,900   194,900      
Securities borrowed and purchased under agreements to resell 189,900   150,100      
Loans 765,300   726,000      
Other financial assets 494,000   448,000      
Liabilities            
Deposits 1,487,700   1,399,400      
Securities loaned and sold under agreements to repurchase 260,500   148,700      
Long-term debt 190,200   185,000      
Other financial liabilities 197,700   141,800      
Allowance for credit losses 20,000   19,200      
Estimated fair value            
Assets            
HTM debt securities, net of allowance(1) 157,700   184,700      
Securities borrowed and purchased under agreements to resell 189,900   150,100      
Loans 787,500   742,100      
Other financial assets 494,000   448,000      
Liabilities            
Deposits 1,487,700   1,399,300      
Securities loaned and sold under agreements to repurchase 260,500   148,700      
Long-term debt 192,900   189,900      
Other financial liabilities 197,700   141,800      
Estimated fair value | Corporate loans            
Liabilities            
Loans, net of unearned income 8,204   6,804      
Estimated fair value | Level 1            
Assets            
HTM debt securities, net of allowance(1) 73,900   87,300      
Securities borrowed and purchased under agreements to resell 0   0      
Loans 0   0      
Other financial assets 366,400   349,600      
Liabilities            
Deposits 0   0      
Securities loaned and sold under agreements to repurchase 0   0      
Long-term debt 0   0      
Other financial liabilities 0   0      
Estimated fair value | Level 2            
Assets            
HTM debt securities, net of allowance(1) 81,600   95,200      
Securities borrowed and purchased under agreements to resell 189,900   150,100      
Loans 0   0      
Other financial assets 127,600   98,400      
Liabilities            
Deposits 1,487,700   1,399,300      
Securities loaned and sold under agreements to repurchase 260,500   148,700      
Long-term debt 187,400   183,800      
Other financial liabilities 197,700   141,800      
Estimated fair value | Level 3            
Assets            
HTM debt securities, net of allowance(1) 2,200   2,200      
Securities borrowed and purchased under agreements to resell 0   0      
Loans 787,500   742,100      
Other financial assets 0   0      
Liabilities            
Deposits 0   0      
Securities loaned and sold under agreements to repurchase 0   0      
Long-term debt 5,500   6,100      
Other financial liabilities 0   0      
Estimated fair value | Level 3 | Corporate loans            
Fair value measurements additional disclosures            
Unfunded lending commitments 11,400   10,800      
Carried at cost | Non-marketable equity securities            
Liabilities            
Investments $ 6,000   $ 5,100