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Commitments and Contingencies (Energy Purchases, Energy Sales, Other Commitments and Legal Matters) (Details)
$ in Millions
12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Oct. 07, 2024
MW
Jul. 01, 2022
MW
Dec. 06, 2018
MW
Apr. 09, 2018
MW
Oct. 01, 2015
MW
Dec. 31, 2014
MW
May 01, 2012
MW
Jul. 01, 2011
MW
Jul. 01, 2010
MW
Jun. 30, 2010
MW
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]                          
LTCS Renewable Energy Contract, Deepwater Agreement, Power | MW                         30
LTCS Renewable Energy Contract, Three-State Procurement, Power | MW             36.427            
LTCS Renewable Energy Contract, Offshore Wind Energy Procurement, Power | MW           408              
LTCS Renewable Energy Contracting Capacity Requirement | MW                 90        
LTCS Renewable Energy Contract, First Solicitation, Power | MW                     3.2    
LTCS Renewable Energy Contract, Second Solicitation, Power | MW                   3.9      
LTCS Renewable Energy Contract, Third Solicitation, Power | MW               80          
LTCS Renewable Energy Contract, Fourth Solicitation, Power | MW                       32.1  
Minimum [Member]                          
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]                          
ACES Renewable Energy Contracting Capacity Requirement | MW         200                
RIE Solicitation of Renewable Contracting Capacity | MW       20                  
Maximum [Member]                          
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]                          
RIE Solicitation of Renewable Contracting Capacity | MW       150                  
Power Purchase [Member]                          
Energy Purchase Commitments (Numeric) [Abstract]                          
2023 $ 36                        
2024 39                        
2025 39                        
2026 36                        
2027 36                        
Thereafter 256                        
Total 442                        
Purchases 30 $ 29 $ 30                    
Rhode Island Energy | Power Purchase [Member]                          
Energy Purchase Commitments (Numeric) [Abstract]                          
2023 274                        
Thereafter 300                        
Total 936                        
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]                          
2026-2027 240                        
2028-2029 122                        
Louisville Gas And Electric Co [Member] | Power Purchase [Member]                          
Energy Purchase Commitments (Numeric) [Abstract]                          
2023 25                        
2024 27                        
2025 27                        
2026 25                        
2027 25                        
Thereafter 177                        
Total 306                        
Purchases 21 20 21                    
Kentucky Utilities Co [Member] | Power Purchase [Member]                          
Energy Purchase Commitments (Numeric) [Abstract]                          
2023 11                        
2024 12                        
2025 12                        
2026 11                        
2027 11                        
Thereafter 79                        
Total 136                        
Purchases 9 9 $ 9                    
PPL Electric Additional Sites [Member] | PPL Electric [Member]                          
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]                          
Accrual for Environmental Loss Contingencies 8 8                      
PPL Electric Additional Sites [Member] | PPL Electric Utilities Corp [Member]                          
Legal Matters - Cane Run Environmental Claims (Numeric) [Abstract]                          
Accrual for Environmental Loss Contingencies $ 8 $ 8