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Financing Activities - Short-term Debt (Details) - Commercial Paper [Member] - USD ($)
$ in Millions
Dec. 31, 2023
Jun. 30, 2023
Dec. 31, 2022
Short-term Debt [Line Items]      
Capacity $ 3,300    
Commercial paper issuances 993   $ 987
Unused capacity $ 2,307    
PPL Capital Funding [Member]      
Short-term Debt [Line Items]      
Weighted-average interest rate 5.66%   4.84%
Capacity $ 1,350    
Commercial paper issuances 365   $ 561
Unused capacity $ 985    
PPL Electric [Member]      
Short-term Debt [Line Items]      
Weighted-average interest rate 5.67%   4.74%
Capacity $ 650    
Commercial paper issuances 510   $ 145
Unused capacity $ 140    
LGE [Member]      
Short-term Debt [Line Items]      
Weighted-average interest rate   4.94%
Capacity $ 500    
Commercial paper issuances 0   $ 180
Unused capacity $ 500    
KU [Member]      
Short-term Debt [Line Items]      
Weighted-average interest rate 5.64%   4.90%
Capacity $ 400    
Commercial paper issuances 93   $ 101
Unused capacity $ 307    
Rhode Island Energy      
Short-term Debt [Line Items]      
Weighted-average interest rate 5.72%    
Capacity $ 400 $ 400  
Commercial paper issuances 25    
Unused capacity $ 375    
PPL Electric Utilities Corp [Member]      
Short-term Debt [Line Items]      
Weighted-average interest rate 5.67%   4.74%
Capacity $ 650    
Commercial paper issuances 510   $ 145
Unused capacity $ 140    
Louisville Gas And Electric Co [Member]      
Short-term Debt [Line Items]      
Weighted-average interest rate   4.94%
Capacity $ 500    
Commercial paper issuances 0   $ 180
Unused capacity $ 500    
Kentucky Utilities Co [Member]      
Short-term Debt [Line Items]      
Weighted-average interest rate 5.64%   4.90%
Capacity $ 400    
Commercial paper issuances 93   $ 101
Unused capacity $ 307