EMPLOYEE BENEFIT PLANS - Net Periodic (Benefit) Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Defined Benefit Plan Disclosure
Service cost	$ 0	$ 0	$ 0
Interest cost	611	582	700
Expected return on plan assets	(1,319)	(1,522)	(1,373)
Amortization of prior service credit	0	0	0
Recognized net actuarial loss	255	354	300
Settlements	0	2	38
Special termination benefits	0	0	0
Net periodic (benefit) cost	(453)	(584)	(335)
Other Postretirement and Postemployment Benefits
Defined Benefit Plan Disclosure
Service cost	70	86	96
Interest cost	128	117	120
Expected return on plan assets	(17)	(34)	(44)
Amortization of prior service credit	(5)	(6)	(9)
Recognized net actuarial loss	56	55	44
Settlements	0	0	0
Special termination benefits	0	0	1,260
Net periodic (benefit) cost	$ 232	$ 218	$ 1,467