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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)

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