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STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY Part 2 AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Translation Adjustment	$ (269)		$ (269)		$ (309)	$ (296)
Change in cumulative translation adjustment	23	$ (21)	40	$ (28)	(13)
Benefit Plans Unrecognized Prior Service Credits	113		113		106	136
Change in Benefit Plans Unrecognized Prior Service Credits			7		(30)
Unrealized Gains (Losses) on Derivative Instruments	(46)		(46)		(41)	(48)
Change in Unrealized Gains (Losses) on Derivative Instruments			(5)		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			42
Accumulated Other Comprehensive Income (Loss), Net of Tax	(203)		(203)		(245)	$ (209)
Total other comprehensive income (loss), net of tax	$ 32	$ (1)	22	$ 15	$ (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