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)