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, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	May 31, 2022
Net periodic benefit cost
Projected benefit obligation					$ 11
Pension benefits
Net periodic benefit cost
Service cost	$ 21	$ 22	$ 40	$ 44
Interest cost	24	18	48	36
Expected return on plan assets	(40)	(36)	(79)	(72)
Amortization of net losses and prior service costs	11	23	23	46
Net periodic pension cost (income)	16	27	32	54
OPEB
Net periodic benefit cost
Interest cost	1	1	2	2
Amortization of net losses and prior service costs	(3)	(3)	(6)	(5)
Net periodic pension cost (income)	$ (2)	$ (2)	$ (4)	$ (3)