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RETIREMENT BENEFITS - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]      
Pension settlement charges $ (119)    
Accumulated benefit obligation 1,900 $ 2,200  
Defined contribution plan expense $ 395 380 $ 360
Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Investment allocation, percentage 21.00%    
Debt Securities      
Defined Benefit Plan Disclosure [Line Items]      
Investment allocation, percentage 35.00%    
Total return swap contracts      
Defined Benefit Plan Disclosure [Line Items]      
Investment allocation, percentage 44.00%    
Pension Plans, Defined Benefit      
Defined Benefit Plan Disclosure [Line Items]      
Net periodic benefit cost of defined benefit pension plans $ 15 11 27
Benefit obligation $ 1,945 $ 2,238 $ 1,976
Discount rate 3.50% 3.40%  
Other Postretirement Benefits Plan      
Defined Benefit Plan Disclosure [Line Items]      
Benefit obligation $ 160 $ 183  
Discount rate 5.40% 4.80%