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POSTRETIREMENT BENEFIT PLANS - Narrative (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
USD ($)
category
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
category
Sep. 30, 2024
USD ($)
Defined Benefit Plan Disclosure [Line Items]        
Number of categories | category 3   3  
Defined contribution plan costs $ 55 $ 47 $ 194 $ 210
Continuing operations        
Defined Benefit Plan Disclosure [Line Items]        
Defined contribution plan costs   47   175
Principal retiree benefit        
Defined Benefit Plan Disclosure [Line Items]        
Plans expense (income) $ (17) (22) $ (49) (79)
Principal retiree benefit | Continuing operations        
Defined Benefit Plan Disclosure [Line Items]        
Plans expense (income)   $ (22)   $ (65)