ACCUMULATED OTHER COMPREHENSIVE LOSS (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ (1,770)	$ (1,665)
Net other comprehensive income	219	(105)	$ (104)
Ending balance	(1,551)	(1,770)	(1,665)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(55)	(56)	(57)
Other comprehensive income (loss) before reclassifications	2	0	1
Net other comprehensive income	2	1	1
Ending balance	(53)	(55)	(56)
Pension and Other Postretirement Benefits
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(1,715)	(1,609)	(1,504)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	180	(242)	(213)
Other Comprehensive Income (Loss) before Reclassifications, Tax	(43)	57	51
Other comprehensive income (loss) before reclassifications	137	(185)	(162)
Amounts reclassified from AOCL	80	79	57
Reclassification from AOCI, Current Period, Tax	(24)	(24)	(18)
Net other comprehensive income	217	(106)	(105)
Ending balance	(1,498)	(1,715)	(1,609)
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	$ 104	$ 103	$ 75