REPOSITIONING AND OTHER CHARGES 4 (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) Employees	Mar. 31, 2020 USD ($) Employees
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 120	$ 70
Net repositioning and other charges Paragraph Details [Abstract]
Gross Repositioning Charge	$ 119	$ 83
Number of employees severed | Employees	1,021	2,124
Severance
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 28	$ 66
Asset impairments
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Incurred Cost	42	2
Exit costs
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	10	11
Restructuring and Related Cost, Incurred Cost	49	15
Reserve adjustments
Net Repositioning And Other Charges [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 1	$ (13)