v3.26.3
FAIR VALUE - Schedule of Carrying Amounts and Estimated Fair Values of Financial Instruments (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Financial assets:    
Investments in debt securities HTM $ 20,732 $ 11,871
LHFI, net 135,058 76,891
Level 3    
Financial assets:    
Equity and other investments 890 992
Carrying Value    
Financial assets:    
Cash, cash equivalents, and restricted cash 30,230 19,696
Federal funds sold and securities purchased under resale agreements or similar arrangements 9,592 8,640
Investments in debt securities HTM 22,584 13,212
Equity and other investments 936 997
LHFI, net 135,058 76,891
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]    
Deposits 21,032 15,077
Federal funds purchased and securities loaned or sold under repurchase agreements 22,790 19,460
Borrowings and other debt obligations 42,816 37,102
Fair Value    
Financial assets:    
Cash, cash equivalents, and restricted cash 30,230 19,696
Federal funds sold and securities purchased under resale agreements or similar arrangements 9,572 8,641
Investments in debt securities HTM 20,732 11,871
Equity and other investments 936 997
LHFI, net 137,215 77,028
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]    
Deposits 21,002 15,095
Federal funds purchased and securities loaned or sold under repurchase agreements 22,772 19,463
Borrowings and other debt obligations 42,790 37,747
Fair Value | Level 1    
Financial assets:    
Cash, cash equivalents, and restricted cash 30,230 19,696
Federal funds sold and securities purchased under resale agreements or similar arrangements 0 0
Investments in debt securities HTM 1,771 2,087
Equity and other investments 41 0
LHFI, net 0 0
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]    
Deposits 0 0
Federal funds purchased and securities loaned or sold under repurchase agreements 0 0
Borrowings and other debt obligations 0 0
Fair Value | Level 2    
Financial assets:    
Cash, cash equivalents, and restricted cash 0 0
Federal funds sold and securities purchased under resale agreements or similar arrangements 9,572 8,641
Investments in debt securities HTM 18,961 9,784
Equity and other investments 5 5
LHFI, net 532 382
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]    
Deposits 21,002 15,095
Federal funds purchased and securities loaned or sold under repurchase agreements 22,772 19,463
Borrowings and other debt obligations 42,408 34,364
Fair Value | Level 3    
Financial assets:    
Cash, cash equivalents, and restricted cash 0 0
Federal funds sold and securities purchased under resale agreements or similar arrangements 0 0
Investments in debt securities HTM 0 0
Equity and other investments 890 992
LHFI, net 136,683 76,646
Financial Instruments, Financial Liabilities, Balance Sheet Groupings [Abstract]    
Deposits 0 0
Federal funds purchased and securities loaned or sold under repurchase agreements 0 0
Borrowings and other debt obligations $ 382 $ 3,383