v3.25.2
Fair Value Measurements - Financial Instruments Not Recorded at Fair Value (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Carrying Amount [Member]    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Debt Instrument, Fair Value Disclosure $ 16,511 $ 16,503
Fair Value [Member]    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Debt Instrument, Fair Value Disclosure 15,750 15,562
PPL Electric Utilities Corp [Member] | Carrying Amount [Member]    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Debt Instrument, Fair Value Disclosure 5,215 5,214
PPL Electric Utilities Corp [Member] | Fair Value [Member]    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Debt Instrument, Fair Value Disclosure 4,901 4,862
Louisville Gas And Electric Co [Member] | Carrying Amount [Member]    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Debt Instrument, Fair Value Disclosure 2,472 2,471
Louisville Gas And Electric Co [Member] | Fair Value [Member]    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Debt Instrument, Fair Value Disclosure 2,316 2,295
Kentucky Utilities Co [Member] | Carrying Amount [Member]    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Debt Instrument, Fair Value Disclosure 3,067 3,066
Kentucky Utilities Co [Member] | Fair Value [Member]    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Debt Instrument, Fair Value Disclosure $ 2,771 $ 2,750