v3.26.3
Fair Value Measurements - Financial Instruments Not Recorded at Fair Value (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
PPL Corporate Units    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Equity Units, Contract Adjustment Liability $ 95  
Carrying Amount [Member]    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Debt Instrument, Fair Value Disclosure 20,211 $ 18,894
Carrying Amount [Member] | PPL Corporate Units    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Equity Units, Contract Adjustment Liability 82 0
Fair Value [Member]    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Debt Instrument, Fair Value Disclosure 18,451 18,488
Fair Value [Member] | PPL Corporate Units    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Equity Units, Contract Adjustment Liability 80 0
PPL Electric Utilities Corp [Member] | Carrying Amount [Member]    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Debt Instrument, Fair Value Disclosure 6,200 5,707
PPL Electric Utilities Corp [Member] | Fair Value [Member]    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Debt Instrument, Fair Value Disclosure 5,450 5,473
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 2,816 2,865
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 2,520 2,784
Kentucky Utilities Co [Member] | Carrying Amount [Member]    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Debt Instrument, Fair Value Disclosure 3,493 3,510
Kentucky Utilities Co [Member] | Fair Value [Member]    
Fair Value of Financial Instruments Not Recorded at Fair Value - Other    
Debt Instrument, Fair Value Disclosure $ 3,016 $ 3,304