PENSION AND OTHER POSTRETIREMENT BENEFITS - Components of Net Periodic Cost (Benefit) and Amounts Recognized in Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Other comprehensive income (loss):
Deferred income taxes	$ 34	$ 14	$ 108
Recognized in other comprehensive income (loss), net of tax	105	45	337
Discontinued operations
Components of net periodic cost:
Net periodic cost (benefit)		7	3
Pension Benefits
Components of net periodic cost:
Service cost	0	0	0
Interest cost	198	207	150
Expected return on plan assets	(136)	(128)	(172)
Amortization of actuarial losses (gains)	80	83	97
Net periodic cost (benefit)	142	162	75
Other comprehensive income (loss):
Actuarial (loss) gain	57	(22)	325
Share of equity investee	0	0	1
Amortization of actuarial losses (gains)	80	83	97
Recognized in other comprehensive income (loss), before tax	137	61	423
Deferred income taxes	(34)	(14)	(103)
Recognized in other comprehensive income (loss), net of tax	103	47	320
Postretirement Benefits
Components of net periodic cost:
Service cost	1	1	1
Interest cost	10	12	8
Expected return on plan assets	0	0	0
Amortization of actuarial losses (gains)	(17)	(18)	(15)
Net periodic cost (benefit)	(6)	(5)	(6)
Other comprehensive income (loss):
Actuarial (loss) gain	14	11	29
Share of equity investee	0	0	0
Amortization of actuarial losses (gains)	(17)	(18)	(15)
Recognized in other comprehensive income (loss), before tax	(3)	(7)	14
Deferred income taxes	1	2	(3)
Recognized in other comprehensive income (loss), net of tax	$ (2)	$ (5)	$ 11