PENSION AND OTHER POST-EMPLOYMENT BENEFIT PLANS - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Pension
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 5	$ 5	$ 14	$ 15
Interest cost	30	29	90	87
Expected return on plan assets	(26)	(31)	(78)	(92)
Amortization of actuarial loss	14	12	42	32
Amortization of prior service cost (credit)	0	0	1	1
Total net periodic benefit cost	23	15	69	43
Other Post-Employment Benefits
Defined Benefit Plan Disclosure [Line Items]
Interest cost	1	1	3	3
Amortization of actuarial loss	0	0	0	1
Amortization of prior service cost (credit)	0	(1)	(1)	(1)
Total net periodic benefit cost	$ 1	$ 0	$ 2	$ 3