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EMPLOYEE BENEFITS - Summary of Plan Assets (Details) - Postretirement Benefits - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Plan assets $ 178 $ 173 $ 162
Fair Value, Inputs, Level 1, 2 and 3      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Plan assets $ 167 163  
Mutual funds - corporate bonds fund      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Plan Assets, Fair Value by Hierarchy and NAV [Extensible List] Fair Value, Inputs, Level 1 [Member]    
Plan assets $ 10 10  
Corporate bonds      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Plan Assets, Fair Value by Hierarchy and NAV [Extensible List] Fair Value, Inputs, Level 2 [Member]    
Plan assets $ 48 56  
Government/municipal bonds      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Plan Assets, Fair Value by Hierarchy and NAV [Extensible List] Fair Value, Inputs, Level 2 [Member]    
Plan assets $ 8 9  
Equity funds      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Defined Benefit Plan, Plan Assets, Fair Value by Hierarchy and NAV [Extensible List] Fair Value, Inputs, Level 2 [Member]    
Plan assets $ 101 88  
Trust Assets and Liabilities, Net      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Plan assets $ 11 $ 10