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REPOSITIONING AND OTHER CHARGES 4 (Details)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
Employees
Jun. 30, 2020
USD ($)
Employees
Jun. 30, 2021
USD ($)
Employees
Jun. 30, 2020
USD ($)
Employees
Net Repositioning And Other Charges [Line Items]        
Restructuring and Related Cost, Incurred Cost $ 70 $ 255 $ 190 $ 325
Net repositioning and other charges Paragraph Details [Abstract]        
Gross Repositioning Charge $ 92 $ 273 $ 211 $ 356
Number of employees severed | Employees 3,628 7,805 4,649 9,929
Severance        
Net Repositioning And Other Charges [Line Items]        
Restructuring and Related Cost, Incurred Cost $ 32 $ 254 $ 60 $ 320
Asset impairments        
Net Repositioning And Other Charges [Line Items]        
Restructuring and Related Cost, Incurred Cost 45 4 87 6
Exit costs        
Net Repositioning And Other Charges [Line Items]        
Restructuring and Related Cost, Cost Incurred to Date 20 19 20 19
Restructuring and Related Cost, Incurred Cost 15 15 64 30
Reserve adjustments        
Net Repositioning And Other Charges [Line Items]        
Restructuring and Related Cost, Incurred Cost $ (22) $ (18) $ (21) $ (31)