v3.25.4
RETIREMENT BENEFITS - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]      
Pension settlement charges   $ 119  
Accumulated benefit obligation $ 2,000 1,900  
Defined contribution plan expense $ 325 395 $ 380
Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Investment allocation, percentage 22.00%    
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 43.00%    
Pension Plans, Defined Benefit      
Defined Benefit Plan Disclosure [Line Items]      
Net periodic benefit cost of defined benefit pension plans $ 28 15 11
Benefit obligation $ 2,036 $ 1,945 $ 2,238
Discount rate 3.80% 3.50%  
Other Postretirement Benefits Plan      
Defined Benefit Plan Disclosure [Line Items]      
Benefit obligation $ 116 $ 160  
Discount rate 5.10% 5.40%