ACCUMULATED OTHER COMPREHENSIVE LOSS (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ (1,402)	$ (1,551)
Net other comprehensive income	59	149	$ 219
Ending balance	(1,343)	(1,402)	(1,551)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(54)	(53)	(55)
Other comprehensive income (loss) before reclassifications	1	0	2
Net other comprehensive income	1	(1)	2
Ending balance	(53)	(54)	(53)
Pension and Other Postretirement Benefits
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,348)	(1,498)	(1,715)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(116)	96	180
Other Comprehensive Income (Loss) before Reclassifications, Tax	25	(22)	(43)
Other comprehensive income (loss) before reclassifications	(91)	74	137
Amounts reclassified from AOCL	149	76	80
Reclassification from AOCI, Current Period, Tax	(45)	(22)	(24)
Net other comprehensive income	58	150	217
Ending balance	(1,290)	(1,348)	(1,498)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amounts reclassified from AOCL	0	(1)	0
Reclassification out of Accumulated Other Comprehensive Income [Member] | Pension and Other Postretirement Benefits
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	$ 194	$ 98	$ 104