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PENSION, POSTRETIREMENT AND OTHER EMPLOYEE BENEFIT PLANS - Pension and Other Postretirement Plan Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Level 3      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets $ 314 $ 322 $ 333
Pension Benefits      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 3,601 3,599 3,467
Pension Benefits | Level 1      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 106 87  
Pension Benefits | Level 2      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 257 501  
Pension Benefits | Level 3      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 269 276  
Pension Benefits | Assets Measured at NAV      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 2,969 2,735  
Pension Benefits | Equity securities funds      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 1,231 1,265  
Pension Benefits | Equity securities funds | Level 1      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 92 74  
Pension Benefits | Equity securities funds | Level 2      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 4 3  
Pension Benefits | Equity securities funds | Level 3      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 150 134  
Pension Benefits | Equity securities funds | Assets Measured at NAV      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 985 1,054  
Pension Benefits | Fixed-income securities      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 1,359 1,325  
Pension Benefits | Fixed-income securities | Level 1      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Fixed-income securities | Level 2      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 100 411  
Pension Benefits | Fixed-income securities | Level 3      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 1 3  
Pension Benefits | Fixed-income securities | Assets Measured at NAV      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 1,258 911  
Pension Benefits | Alternatives      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 762 779  
Pension Benefits | Alternatives | Level 1      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Alternatives | Level 2      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 0 0  
Pension Benefits | Alternatives | Level 3      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 116 136  
Pension Benefits | Alternatives | Assets Measured at NAV      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 646 643  
Pension Benefits | Other investments      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 249 230  
Pension Benefits | Other investments | Level 1      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 14 13  
Pension Benefits | Other investments | Level 2      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 153 87  
Pension Benefits | Other investments | Level 3      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 2 3  
Pension Benefits | Other investments | Assets Measured at NAV      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 80 127  
Other Postretirement Benefits      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 45 46 $ 48
Other Postretirement Benefits | Deposit administration fund      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 45 46  
Other Postretirement Benefits | Deposit administration fund | Level 1      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 0 0  
Other Postretirement Benefits | Deposit administration fund | Level 2      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 0 0  
Other Postretirement Benefits | Deposit administration fund | Level 3      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets 45 46  
Other Postretirement Benefits | Deposit administration fund | Assets Measured at NAV      
Defined Benefit Plan, Plan Assets, Category [Line Items]      
Fair value of plan assets $ 0 $ 0