REPOSITIONING AND OTHER CHARGES 4 (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) Employees	Sep. 30, 2019 USD ($) Employees	Sep. 30, 2020 USD ($) Employees	Sep. 30, 2019 USD ($) Employees
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 124	$ 86	$ 449	$ 228
Net repositioning and other charges Paragraph Details [Abstract]
Gross Repositioning Charge	$ 135	$ 89	$ 491	$ 235
Number of employees severed | Employees	3,113	1,123	13,042	3,436
Severance
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 113	$ 41	$ 433	$ 147
Asset impairments
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Incurred Cost	5	15	11	26
Exit costs
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	32	21	32	21
Restructuring and Related Cost, Incurred Cost	17	33	47	62
Reserve adjustments
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Incurred Cost	$ (11)	$ (3)	$ (42)	$ (7)