v3.26.1
DERIVATIVES - Schedule of Fair Value Hedges (Details) - Interest rate swap - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Income Statement Location [Axis]: us-gaap:InterestAndDividendIncomeOperating        
Derivative Instruments, Gain (Loss) [Line Items]        
Hedged items $ (58) $ 50 $ (97) $ 166
Derivatives 60 (50) 99 (168)
Amounts related to interest settlements on derivatives (2) 13 (2) 24
Total net interest income recognized on fair value hedges 0 13 0 22
Income Statement Location [Axis]: us-gaap:InterestExpenseOperating        
Derivative Instruments, Gain (Loss) [Line Items]        
Hedged items 0 (2) 0 (4)
Derivatives 0 2 0 4
Amounts related to interest settlements on derivatives 0 (3) 0 (5)
Total net interest income recognized on fair value hedges $ 0 $ (3) $ 0 $ (5)