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PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS - Schedule of Other Changes in Plan Assets and Benefit Obligations Recognized in OCI (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plan [Line Items]      
Current year actuarial loss / (gain) $ 99 $ 54 $ (56)
Current year prior service cost (credit) 1 (5) 0
Total recognized in other comprehensive income (loss) (pre-tax) 99 $ 27 $ (104)
Other Postretirement Benefits      
Defined Benefit Plans and Other Postretirement Benefit Plan [Line Items]      
Current year actuarial loss / (gain) 11    
Actuarial (loss) recognized during the year 1    
Current year prior service cost (credit) 2    
Prior service credit (cost) recognized during the year 41    
Total recognized in other comprehensive income (loss) (pre-tax) 55    
Total recognized in net periodic benefit costs and other comprehensive income (loss) (pre-tax) 20    
United States Pension Benefits | Pension Benefits      
Defined Benefit Plans and Other Postretirement Benefit Plan [Line Items]      
Current year actuarial loss / (gain) 10    
Actuarial (loss) recognized during the year (37)    
Current year prior service cost (credit) 0    
Prior service credit (cost) recognized during the year 0    
Total recognized in other comprehensive income (loss) (pre-tax) (27)    
Total recognized in net periodic benefit costs and other comprehensive income (loss) (pre-tax) (13)    
Foreign Pension Benefits | Pension Benefits      
Defined Benefit Plans and Other Postretirement Benefit Plan [Line Items]      
Current year actuarial loss / (gain) 78    
Actuarial (loss) recognized during the year (6)    
Current year prior service cost (credit) (1)    
Prior service credit (cost) recognized during the year 0    
Total recognized in other comprehensive income (loss) (pre-tax) 71    
Total recognized in net periodic benefit costs and other comprehensive income (loss) (pre-tax) $ 84