v3.26.1
Fair Values of Assets and Liabilities - Estimated Fair Values of Financial Instruments (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Financial Assets    
Cash and due from banks $ 66,491 $ 46,890
Investment securities held-to-maturity 64,622 67,079
Financial Liabilities    
Long-term debt 58,671 60,764
Carrying Amount    
Financial Assets    
Cash and due from banks 66,491 46,890
Federal funds sold and securities purchased under resale agreements 5,742 12,359
Investment securities held-to-maturity 74,085 76,170
Loans held for sale 393 185
Loans, net of allowance for losses 402,655 383,730
Other 2,634 2,074
Financial Liabilities    
Time deposits 46,494 47,314
Short-term borrowings 34,830 14,649
Long-term debt 56,767 59,350
Other 5,325 4,940
Fair Value    
Financial Assets    
Cash and due from banks 66,491 46,890
Federal funds sold and securities purchased under resale agreements 5,742 12,359
Investment securities held-to-maturity 64,622 67,079
Loans held for sale 393 185
Loans, net of allowance for losses 400,044 383,323
Other 2,634 2,074
Financial Liabilities    
Time deposits 46,497 47,391
Short-term borrowings 34,671 14,490
Long-term debt 56,114 59,149
Other 5,325 4,940
Fair Value | Level 1    
Financial Assets    
Cash and due from banks 66,491 46,890
Federal funds sold and securities purchased under resale agreements 0 0
Investment securities held-to-maturity 643 644
Loans held for sale 0 0
Loans, net of allowance for losses 0 0
Other 0 0
Financial Liabilities    
Time deposits 0 0
Short-term borrowings 0 0
Long-term debt 0 0
Other 0 0
Fair Value | Level 2    
Financial Assets    
Cash and due from banks 0 0
Federal funds sold and securities purchased under resale agreements 5,742 12,359
Investment securities held-to-maturity 63,979 66,435
Loans held for sale 0 0
Loans, net of allowance for losses 0 0
Other 2,187 1,641
Financial Liabilities    
Time deposits 46,497 47,391
Short-term borrowings 34,671 14,490
Long-term debt 56,114 59,149
Other 1,411 1,419
Fair Value | Level 3    
Financial Assets    
Cash and due from banks 0 0
Federal funds sold and securities purchased under resale agreements 0 0
Investment securities held-to-maturity 0 0
Loans held for sale 393 185
Loans, net of allowance for losses 400,044 383,323
Other 447 433
Financial Liabilities    
Time deposits 0 0
Short-term borrowings 0 0
Long-term debt 0 0
Other $ 3,914 $ 3,521