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Financing Activities - Short-term Debt (Details) - Commercial Paper [Member] - USD ($)
$ in Millions
Sep. 30, 2022
Aug. 31, 2022
Dec. 31, 2021
Short-term Debt [Line Items]      
Capacity $ 2,900    
Commercial Paper Issuances 510   $ 69
Unused Capacity $ 2,390    
PPL Capital Funding [Member]      
Short-term Debt [Line Items]      
Weighted - Average Interest Rate 2.50%    
Capacity $ 1,350    
Commercial Paper Issuances 400   0
Unused Capacity 950    
PPL Electric [Member]      
Short-term Debt [Line Items]      
Capacity 650    
Commercial Paper Issuances 0   $ 0
Unused Capacity $ 650    
LGE [Member]      
Short-term Debt [Line Items]      
Weighted - Average Interest Rate 2.51%   0.31%
Capacity $ 500 $ 500  
Commercial Paper Issuances 110   $ 69
Unused Capacity $ 390    
KU [Member]      
Short-term Debt [Line Items]      
Weighted - Average Interest Rate    
Capacity $ 400 400  
Commercial Paper Issuances 0   0
Unused Capacity 400    
PPL Electric Utilities Corp [Member]      
Short-term Debt [Line Items]      
Capacity 650    
Commercial Paper Issuances 0   $ 0
Unused Capacity $ 650    
Louisville Gas And Electric Co [Member]      
Short-term Debt [Line Items]      
Weighted - Average Interest Rate 2.51%   0.31%
Capacity $ 500 500  
Commercial Paper Issuances 110   $ 69
Unused Capacity $ 390    
Kentucky Utilities Co [Member]      
Short-term Debt [Line Items]      
Weighted - Average Interest Rate    
Capacity $ 400 $ 400  
Commercial Paper Issuances 0   $ 0
Unused Capacity $ 400