EMPLOYEE BENEFITS - Schedule of Net Periodic (Income) Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 4	$ 3	$ 3
Interest cost	51	37	34
Expected return on plan assets	(92)	(93)	(85)
Amortization of actuarial loss	17	14	17
Settlement	0	0	15
Net periodic pension cost (income)	(20)	(39)	(16)
Net actuarial loss (gain)	(43)	52	(74)
Amortization of actuarial loss	(17)	(14)	(17)
Settlement	0	0	(15)
Total recognized in OCI	(60)	38	(106)
Total recognized in net periodic benefit cost (income) and OCI	(80)	$ (1)	$ (122)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Expected Return (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]		Other operating expense
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Interest Cost, Statement of Income or Comprehensive Income [Extensible Enumeration]			Other operating expense
Qualified Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	4	$ 3	$ 3
Interest cost	46	34	31
Expected return on plan assets	(92)	(93)	(85)
Amortization of actuarial loss	15	11	14
Settlement	0	0	15
Net periodic pension cost (income)	(27)	(45)	(22)
Net actuarial loss (gain)	(44)	71	(73)
Amortization of actuarial loss	(15)	(11)	(14)
Settlement	0	0	(15)
Total recognized in OCI	(59)	60	(102)
Total recognized in net periodic benefit cost (income) and OCI	(86)	15	(124)
Non-Qualified Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0
Interest cost	5	3	3
Expected return on plan assets	0	0	0
Amortization of actuarial loss	2	3	3
Settlement	0	0	0
Net periodic pension cost (income)	7	6	6
Net actuarial loss (gain)	1	(19)	(1)
Amortization of actuarial loss	(2)	(3)	(3)
Settlement	0	0	0
Total recognized in OCI	(1)	(22)	(4)
Total recognized in net periodic benefit cost (income) and OCI	$ 6	$ (16)	$ 2