v3.26.3
POSTRETIREMENT BENEFIT PLANS - Narrative (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
category
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
category
Sep. 30, 2025
USD ($)
Defined Benefit Plan Disclosure [Line Items]        
Number of categories | category 3   3  
Defined contribution plan costs $ 60 $ 55 $ 224 $ 194
Principal retiree benefit        
Defined Benefit Plan Disclosure [Line Items]        
Plans expense (income) $ (13) $ (17) $ (39) $ (49)