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PENSION AND POSTRETIREMENT BENEFIT PLANS - Obligations and Funded Status of our Defined Benefit Plans (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Jul. 01, 2024
Pension Benefits        
Amounts recognized on the balance sheet        
Other assets $ 67 $ 2   $ 64
Accrued liabilities (1) 0    
Other long-term liabilities (6) (3)    
Amounts recognized in the consolidated balance sheets, total 60 (1)    
Accumulated other comprehensive income, net of tax 2 2    
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]        
Benefit obligation—beginning of year 34 30    
Liabilities assumed in the Aera Merger 249 0    
Service cost—benefits earned during the period 3 1 $ 1  
Interest cost on projected benefit obligation 8 1 1  
Actuarial (gain) loss (2) 3    
Benefits paid (20) (1)    
Benefit obligation—beginning of year 272 34 30  
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]        
Fair value of plan assets—beginning of year 34 32    
Additions due to the Aera Merger 305 0    
Actual return on plan assets 10 3    
Employer contributions 3 0    
Benefits paid (20) (1)    
Fair value of plan assets—end of year 332 34 32  
Net benefit asset 60 0    
Postretirement Benefits        
Amounts recognized on the balance sheet        
Other assets 13 0   $ 9
Accrued liabilities (6) (3)    
Other long-term liabilities (53) (33)    
Amounts recognized in the consolidated balance sheets, total (46) (36)    
Accumulated other comprehensive income, net of tax 73 72    
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]        
Benefit obligation—beginning of year 37 38    
Liabilities assumed in the Aera Merger 70 0    
Service cost—benefits earned during the period 2 2 2  
Interest cost on projected benefit obligation 4 2 1  
Actuarial (gain) loss (5) (2)    
Cost of special termination benefits 4 0 0  
Curtailment gain (4) 0    
Benefits paid (5) (3)    
Plan amendment (3) 0    
Benefit obligation—beginning of year 100 37 38  
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]        
Fair value of plan assets—beginning of year 1 1    
Additions due to the Aera Merger 52 0    
Actual return on plan assets 2 0    
Employer contributions 4 3    
Benefits paid (5) (3)    
Fair value of plan assets—end of year 54 1 $ 1  
Net benefit asset $ (46) $ (36)