v3.26.1
FAIR VALUE (Schedule of Assets and Liabilities Measured at Fair Value by Class on a Recurring Basis) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
ASSETS    
Trading securities $ 104 $ 64
Loans held for sale 57 71
Derivatives 484 360
Derivatives 186 77
Other liabilities:    
Derivatives 392 260
Derivatives 198 192
Fair Value, Recurring    
ASSETS    
Trading securities 104 64
Loans held for sale 57 71
Agriculture loan servicing 20 18
Deferred compensation plan assets 155 154
Netting (298) (283)
Derivatives 186 77
Total assets 10,445 10,327
Fed funds and other short-term borrowings:    
Securities sold, not yet purchased 9 135
Other liabilities:    
Netting (194) (68)
Derivatives 198 192
Total liabilities 207 327
Total available-for-sale | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 9,184 9,207
U.S. Treasury, agencies, and corporations | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 8,291 8,273
Municipal securities | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 869 909
Other debt securities | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 24 25
Bank-owned life insurance | Fair Value, Recurring    
ASSETS    
Other noninterest-bearing investments 576 573
Private equity investments | Fair Value, Recurring    
ASSETS    
Other noninterest-bearing investments 163 163
Level 1 | Fair Value, Recurring    
ASSETS    
Trading securities 0 0
Loans held for sale 0 0
Agriculture loan servicing 0 0
Deferred compensation plan assets 155 154
Derivatives 0 0
Total assets 1,850 1,571
Fed funds and other short-term borrowings:    
Securities sold, not yet purchased 9 135
Other liabilities:    
Derivatives 0 0
Total liabilities 9 135
Level 1 | Total available-for-sale | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 1,691 1,411
Level 1 | U.S. Treasury, agencies, and corporations | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 1,691 1,411
Level 1 | Municipal securities | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 0 0
Level 1 | Other debt securities | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 0 0
Level 1 | Bank-owned life insurance | Fair Value, Recurring    
ASSETS    
Other noninterest-bearing investments 0 0
Level 1 | Private equity investments | Fair Value, Recurring    
ASSETS    
Other noninterest-bearing investments 4 6
Level 2 | Fair Value, Recurring    
ASSETS    
Trading securities 104 64
Loans held for sale 57 71
Agriculture loan servicing 0 0
Deferred compensation plan assets 0 0
Derivatives 484 360
Total assets 8,714 8,864
Fed funds and other short-term borrowings:    
Securities sold, not yet purchased 0 0
Other liabilities:    
Derivatives 392 260
Total liabilities 392 260
Level 2 | Total available-for-sale | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 7,493 7,796
Level 2 | U.S. Treasury, agencies, and corporations | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 6,600 6,862
Level 2 | Municipal securities | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 869 909
Level 2 | Other debt securities | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 24 25
Level 2 | Bank-owned life insurance | Fair Value, Recurring    
ASSETS    
Other noninterest-bearing investments 576 573
Level 2 | Private equity investments | Fair Value, Recurring    
ASSETS    
Other noninterest-bearing investments 0 0
Level 3 | Fair Value, Recurring    
ASSETS    
Trading securities 0 0
Loans held for sale 0 0
Agriculture loan servicing 20 18
Deferred compensation plan assets 0 0
Derivatives 0 0
Total assets 179 175
Fed funds and other short-term borrowings:    
Securities sold, not yet purchased 0 0
Other liabilities:    
Derivatives 0 0
Total liabilities 0 0
Level 3 | Total available-for-sale | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 0 0
Level 3 | U.S. Treasury, agencies, and corporations | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 0 0
Level 3 | Municipal securities | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 0 0
Level 3 | Other debt securities | Fair Value, Recurring    
ASSETS    
Investment securities, available-for-sale 0 0
Level 3 | Bank-owned life insurance | Fair Value, Recurring    
ASSETS    
Other noninterest-bearing investments 0 0
Level 3 | Private equity investments | Fair Value, Recurring    
ASSETS    
Other noninterest-bearing investments $ 159 $ 157