v3.26.1
FAIR VALUE (Schedule of Assets and Liabilities Measured at Fair Value by Class on a Recurring Basis Using Level 3 Inputs) (Details) - Level 3 - Fair Value, Recurring - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Private equity investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of assets, beginning balance $ 159 $ 109 $ 157 $ 105
Unrealized securities gains, net 45 20 45 24
Other noninterest income 0 0 0 0
Purchases 7 4 9 5
Cost of investments sold (1) (5) (1) (6)
Transfers out 0 (12) 0 (12)
Fair value of assets, ending balance 210 116 210 116
Ag loan servicing        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Fair value of assets, beginning balance 20 19 18 20
Unrealized securities gains, net 0 0 0 0
Other noninterest income (2) 1 0 0
Purchases 0 0 0 0
Cost of investments sold 0 0 0 0
Transfers out 0 0 0 0
Fair value of assets, ending balance $ 18 $ 20 $ 18 $ 20