PENSION AND OTHER POSTRETIREMENT BENEFIT PROGRAMS - Net Periodic Benefit Cost Relating to Pension and Other Postemployment Employee Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Pension benefits
Net periodic benefit cost
Service cost	$ 7	$ 21	$ 13	$ 40
Interest cost	35	24	72	48
Expected return on plan assets	(43)	(40)	(87)	(79)
Amortization of net losses and prior service costs	1	11	2	23
Net periodic pension cost (income)	0	16	0	32
OPEB
Net periodic benefit cost
Interest cost	2	1	4	2
Amortization of net losses and prior service costs	(6)	(3)	(12)	(6)
Net periodic pension cost (income)	$ (4)	$ (2)	$ (8)	$ (4)