STOCKHOLDERS' EQUITY AND STOCK-BASED COMPENSATION (Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance, stockholders' equity	$ 6,051
Ending balance, stockholders' equity	7,977	$ 6,051
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Reclassification Adjustment, before Tax	52	(79)	$ (7)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance, stockholders' equity	(554)	(507)	(548)
OCI, before Reclassifications, Net of Tax, Attributable to Parent	7	(91)	3
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax	53	44	38
Ending balance, stockholders' equity	(494)	(554)	(507)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance, stockholders' equity	(4)	(6)	(6)
OCI, before Reclassifications, Net of Tax, Attributable to Parent	1	2	0
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax	0	0	0
Ending balance, stockholders' equity	(3)	(4)	(6)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance, stockholders' equity	10	10	10
OCI, before Reclassifications, Net of Tax, Attributable to Parent	0	0	0
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax	0	0	0
Ending balance, stockholders' equity	10	10	10
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance, stockholders' equity	(548)	(503)	(544)
OCI, before Reclassifications, Net of Tax, Attributable to Parent	8	(89)	3
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax	53	44	38
Ending balance, stockholders' equity	(487)	(548)	(503)
Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest [Member]
Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent	45	11	(2)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax	$ (5)	$ (4)	$ (16)