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BUSINESS OPTIMIZATION CHARGES - Summary of Activity in Reserves Related to Restructuring Initiatives (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Restructuring Reserve [Roll Forward]        
Charges $ 26 $ 10 $ 93 $ 35
Severance and Other Employee Related Costs        
Restructuring Reserve [Roll Forward]        
Reserve, beginning balance     109  
Charges     92  
Payments     (70)  
Reserve adjustments     (6)  
Currency translation     (9)  
Reserve, ending balance $ 116   $ 116