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STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY Part 2 AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Translation Adjustment	$ (292)		$ (292)		$ (309)	$ (296)
Change in cumulative translation adjustment	(13)	$ (34)	17	$ (7)	(13)
Benefit Plans Unrecognized Prior Service Credits	120		120		106	136
Change in Benefit Plans Unrecognized Prior Service Credits			14		(30)
Unrealized Gains (Losses) on Derivative Instruments	(62)		(62)		(41)	(48)
Change in Unrealized Gains (Losses) on Derivative Instruments			(21)		7
Unrealized Losses on Investments	(1)		(1)		(1)	(1)
Change in Unrealized Losses on Investments			0		0
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			10
Accumulated Other Comprehensive Income (Loss), Net of Tax	(235)		(235)		(245)	$ (209)
Total other comprehensive income (loss), net of tax	$ (41)	$ 19	(10)	$ 16	$ (36)
Accounting Standards Update 2018-02 [Member] \| Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect on Retained Earnings, Tax			(29)
Accounting Standards Update 2018-02 [Member] \| Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect on Retained Earnings, Tax			$ 9