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REGULATORY MATTERS - Maryland (Details) - Maryland - PE
$ in Millions
 6 Months Ended
Jul. 01, 2024
USD ($)
Mar. 21, 2024
Oct. 19, 2023
Aug. 01, 2023
USD ($)
scenario
Jun. 30, 2024
Regulatory Matters [Line Items]          
Incremental energy savings goal per year (percent)     0.20%    
Incremental energy savings goal thereafter (percent)     2.00%    
Per Year 2022 Through 2024          
Regulatory Matters [Line Items]          
Incremental energy savings goal thereafter (percent)   2.00%      
Per Year 2025          
Regulatory Matters [Line Items]          
Incremental energy savings goal thereafter (percent)   2.25%      
Per Year 2027          
Regulatory Matters [Line Items]          
Incremental energy savings goal thereafter (percent)   2.50%      
2024-2026 EmPOWER Program Cycle          
Regulatory Matters [Line Items]          
Number of scenarios with projected costs submitted for cost recovery program | scenario       3  
Recovery period for expenditures for cost recovery program       3 years  
Public utilities, requested year one       $ 311  
Public utilities, requested year two       354  
Public utilities, requested year three       $ 510  
Amortization period         5 years
Public utilities, requested cost percentage, year one       0.33  
Public utilities, requested cost percentage, year two       0.67  
Public utilities, requested cost percentage, year three       1  
2024-2030 EmPOWER Program Cycle | Subsequent Event | Minimum          
Regulatory Matters [Line Items]          
Expected reduction to pre-tax return on programs $ 25        
2024-2030 EmPOWER Program Cycle | Subsequent Event | Maximum          
Regulatory Matters [Line Items]          
Expected reduction to pre-tax return on programs $ 30