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BUSINESS OPTIMIZATION CHARGES - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Restructuring Cost and Reserve [Line Items]        
Expected additional pre-tax costs $ 5   $ 5  
Charges 15 $ 41 36 $ 140
Employee termination costs        
Restructuring Cost and Reserve [Line Items]        
Charges 12 39 29 124
Employee termination costs | Restructuring Within HST Segment        
Restructuring Cost and Reserve [Line Items]        
Charges 7   14  
Employee termination costs | New Operating Model        
Restructuring Cost and Reserve [Line Items]        
Charges   11 7 79
Contract termination and other costs        
Restructuring Cost and Reserve [Line Items]        
Charges $ 3 $ 2 $ 7 5
Asset impairments        
Restructuring Cost and Reserve [Line Items]        
Charges       $ 11