STOCKHOLDERS' EQUITY Part 2 AOCI (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Translation Adjustment	$ (282)		$ (282)		$ (293)	$ (264)
Change in cumulative translation adjustment	9	$ (14)	11	$ 5	(29)
Benefit Plans Unrecognized Prior Service Credits	73		73		87	106
Change in Benefit Plans Unrecognized Prior Service Credits			(14)		(19)
Unrealized Gains (Losses) on Derivative Instruments	(23)		(23)		(66)	(55)
Change in Unrealized Gains (Losses) on Derivative Instruments			43		(11)
Unrealized Losses on Investments	(1)		(1)		(1)	(1)
Change in Unrealized Losses on Investments			0		0
Accumulated Other Comprehensive Income (Loss), Net of Tax	(233)		(233)		(273)	$ (214)
Total other comprehensive income (loss), net of tax	$ 15	$ (12)	$ 40	$ 5	$ (59)

Amount, after tax, of accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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