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ORGANIZATION AND BASIS OF PRESENTATION - Regulatory Assets on the Balance Sheet (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Regulatory assets on the Balance Sheets    
Regulatory liability $ (995) $ (1,214)
Regulatory assets 617 369
Net Regulatory Liabilities included on the Consolidated Balance Sheets (378) (845)
Change 467  
Current Return 1,243 1,197
Change 46  
Customer payables for future income taxes    
Regulatory assets on the Balance Sheets    
Regulatory liability (2,234) (2,382)
Change 148  
Spent nuclear fuel disposal costs    
Regulatory assets on the Balance Sheets    
Regulatory liability (72) (83)
Change 11  
Asset removal costs    
Regulatory assets on the Balance Sheets    
Regulatory liability (681) (652)
Change (29)  
Deferred transmission costs    
Regulatory assets on the Balance Sheets    
Regulatory assets 190 286
Change (96)  
Current Return 8 6
Change 2  
Deferred generation costs    
Regulatory assets on the Balance Sheets    
Regulatory assets 481 572
Change (91)  
Current Return 314 432
Change (118)  
Deferred distribution costs    
Regulatory assets on the Balance Sheets    
Regulatory assets 287 247
Change 40  
Current Return 153 68
Change 85  
Storm-related costs    
Regulatory assets on the Balance Sheets    
Regulatory assets 1,015 799
Change 216  
Current Return 694 602
Change 92  
Energy efficiency program costs    
Regulatory assets on the Balance Sheets    
Regulatory assets 349 198
Change 151  
New Jersey societal benefit costs    
Regulatory assets on the Balance Sheets    
Regulatory assets 87 79
Change 8  
Vegetation management    
Regulatory assets on the Balance Sheets    
Regulatory assets 125 102
Change 23  
Current Return 16 21
Change (5)  
Other    
Regulatory assets on the Balance Sheets    
Regulatory liability   (11)
Regulatory assets 75  
Change 86  
Current Return 58 $ 68
Change $ (10)