ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 1,368	$ 1,798	$ 2,301	$ 2,809
Other Comprehensive Income (Loss), Net of Tax	(32)	(92)	15
Other Comprehensive Income (Loss), Tax	(32)	(92)	15
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(59)	(62)	(61)	(63)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	(1)	2
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	3	0	0
Other Comprehensive Income (Loss), Net of Tax	3	(1)	2
Pension and Other Postretirement Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(1,293)	(1,258)	(1,167)	(1,180)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(83)	(133)	(34)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	48	42	47
Other Comprehensive Income (Loss), Net of Tax	(35)	(91)	13
Other Comprehensive Income (Loss), Tax	3	(54)	5
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(1,352)	(1,320)	(1,228)	$ (1,243)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(83)	(134)	(32)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	51	42	47
Other Comprehensive Income (Loss), Net of Tax	(32)	(92)	15
Other Comprehensive Income (Loss), Tax	$ (32)	$ (92)	$ 15