v3.26.1
EMPLOYEE BENEFIT PLANS - NET PENSION EXPENSE (Details) - Qualified Defined Benefit - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Service cost $ 7 $ 7 $ 14 $ 14
Interest cost 29 32 59 65
Expected return on assets 37 37 75 74
Recognized actuarial loss (1) (3) (2) (6)
Income Statement Location [Axis]: us-gaap:LaborAndRelatedExpense        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Net pension expense 7 7 14 14
Income Statement Location [Axis]: us-gaap:NonoperatingIncomeExpense        
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]        
Net pension expense $ (7) $ (2) $ (14) $ (3)