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RETIREMENT BENEFITS PLANS - Narrative (Details) - Pension plans - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2026
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
United States        
Defined Benefit Plan Disclosure [Line Items]        
Actuarial loss (gain)   $ 55 $ (20)  
Expected long-term return on plan assets   7.00% 6.50% 6.50%
United States | Forecast        
Defined Benefit Plan Disclosure [Line Items]        
Expected long-term return on plan assets 7.50%      
Non-United States plans        
Defined Benefit Plan Disclosure [Line Items]        
Actuarial loss (gain)   $ 13 $ (82)  
Expected long-term return on plan assets   6.63% 6.79% 6.32%
Non-United States plans | Forecast        
Defined Benefit Plan Disclosure [Line Items]        
Expected long-term return on plan assets 7.00%