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Financing Activities - Short-term Debt (Details) - Commercial Paper [Member] - USD ($)
$ in Millions
Dec. 31, 2022
Aug. 31, 2022
Dec. 31, 2021
Short-term Debt [Line Items]      
Capacity $ 2,900    
Commercial paper issuances 987   $ 69
Unused capacity $ 1,913    
PPL Capital Funding [Member]      
Short-term Debt [Line Items]      
Weighted-average interest rate 4.84%  
Capacity $ 1,350    
Commercial paper issuances 561   $ 0
Unused capacity $ 789    
PPL Electric [Member]      
Short-term Debt [Line Items]      
Weighted-average interest rate 4.74%  
Capacity $ 650    
Commercial paper issuances 145   $ 0
Unused capacity $ 505    
LGE [Member]      
Short-term Debt [Line Items]      
Weighted-average interest rate 4.94%   0.31%
Capacity $ 500 $ 500  
Commercial paper issuances 180   $ 69
Unused capacity $ 320    
KU [Member]      
Short-term Debt [Line Items]      
Weighted-average interest rate 4.90%  
Capacity $ 400 400  
Commercial paper issuances 101   $ 0
Unused capacity $ 299    
PPL Electric Utilities Corp [Member]      
Short-term Debt [Line Items]      
Weighted-average interest rate 4.74%  
Capacity $ 650    
Commercial paper issuances 145   $ 0
Unused capacity $ 505    
Louisville Gas And Electric Co [Member]      
Short-term Debt [Line Items]      
Weighted-average interest rate 4.94%   0.31%
Capacity $ 500 500  
Commercial paper issuances 180   $ 69
Unused capacity $ 320    
Kentucky Utilities Co [Member]      
Short-term Debt [Line Items]      
Weighted-average interest rate 4.90%  
Capacity $ 400 $ 400  
Commercial paper issuances 101   $ 0
Unused capacity $ 299