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Asset Retirement Obligations (Tables)
 3 Months Ended
Mar. 31, 2024
Asset Retirement Obligation [Line Items]  
Asset Retirement Obligation Roll Forward
The changes in the carrying amounts of AROs were as follows.
 PPLLG&EKU
Balance at December 31, 2023$158 $85 $66 
Accretion2 1 1 
Obligations settled(5)(2)(3)
Other1 — — 
Balance at March 31, 2024$156 $84 $64 
Louisville Gas And Electric Co [Member]  
Asset Retirement Obligation [Line Items]  
Asset Retirement Obligation Roll Forward
The changes in the carrying amounts of AROs were as follows.
 PPLLG&EKU
Balance at December 31, 2023$158 $85 $66 
Accretion2 1 1 
Obligations settled(5)(2)(3)
Other1 — — 
Balance at March 31, 2024$156 $84 $64 
Kentucky Utilities Co [Member]  
Asset Retirement Obligation [Line Items]  
Asset Retirement Obligation Roll Forward
The changes in the carrying amounts of AROs were as follows.
 PPLLG&EKU
Balance at December 31, 2023$158 $85 $66 
Accretion2 1 1 
Obligations settled(5)(2)(3)
Other1 — — 
Balance at March 31, 2024$156 $84 $64