PENSION AND POSTRETIREMENT BENEFIT PLANS - Schedule of Components of Net Periodic Benefit Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Pension Benefit
Net periodic benefit costs:
Service cost - benefits earned during the period	$ 1	$ 3	$ 1	$ 3
Interest cost on projected benefit obligation	4	4	11	4
Expected return on plan assets	(6)	(6)	(17)	(7)
Curtailment gain	0		0	0
Settlement loss			1	0
Cost of special termination benefits	0	0	0	0
Amortization of net actuarial gain			0	0
Amortization of prior service cost credit	0	0	0	0
Net periodic benefit costs	(1)	1	(4)	0
Postretirement Benefit
Net periodic benefit costs:
Service cost - benefits earned during the period	1	1	2	2
Interest cost on projected benefit obligation	1	1	4	2
Expected return on plan assets	(1)	(1)	(3)	(1)
Curtailment gain	0	(4)	0	(4)
Settlement loss			0	0
Cost of special termination benefits	0	4	0	4
Amortization of net actuarial gain			(1)	(1)
Amortization of prior service cost credit	(2)	(1)	(4)	(4)
Net periodic benefit costs	$ (1)	$ 0	$ (2)	$ (2)