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REPOSITIONING AND OTHER CHARGES 4 (Details) $ in Millions	3 Months Ended		9 Months Ended
REPOSITIONING AND OTHER CHARGES 4 (Details) $ in Millions	Sep. 30, 2019 USD ($) employee	Sep. 30, 2018 USD ($) employee	Sep. 30, 2019 USD ($) employee	Sep. 30, 2018 USD ($) employee
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 86	$ 74	$ 228	$ 220
Net repositioning and other charges Paragraph Details [Abstract]
Gross Repositioning Charge	$ 89	$ 73	$ 235	$ 222
Number of employees severed \| employee	1,123	816	3,436	2,700
Severance
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 41	$ 39	$ 147	$ 100
Asset impairments
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Incurred Cost	15	26	26	74
Exit costs
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Incurred Cost	33	8	62	48
Reserve adjustments
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Incurred Cost	$ (3)	$ 1	$ (7)	$ (2)