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Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2025
Asset Retirement Obligation [Line Items]  
Asset Retirement Obligation Roll Forward
The changes in the carrying amounts of AROs were as follows:
PPLLG&EKU
 202520242025202420252024
ARO at beginning of period$157 $158 $84 $85 $64 $66 
Accretion8 8 4 4 4 4 
Obligations incurred— 9 — 3 — 6 
Changes in estimated timing or cost2 4 — 3 2 1 
Obligations settled(26)(24)(13)(11)(13)(13)
Other(1)2 — — — — 
ARO at end of period$140 $157 $75 $84 $57 $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
 202520242025202420252024
ARO at beginning of period$157 $158 $84 $85 $64 $66 
Accretion8 8 4 4 4 4 
Obligations incurred— 9 — 3 — 6 
Changes in estimated timing or cost2 4 — 3 2 1 
Obligations settled(26)(24)(13)(11)(13)(13)
Other(1)2 — — — — 
ARO at end of period$140 $157 $75 $84 $57 $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
 202520242025202420252024
ARO at beginning of period$157 $158 $84 $85 $64 $66 
Accretion8 8 4 4 4 4 
Obligations incurred— 9 — 3 — 6 
Changes in estimated timing or cost2 4 — 3 2 1 
Obligations settled(26)(24)(13)(11)(13)(13)
Other(1)2 — — — — 
ARO at end of period$140 $157 $75 $84 $57 $64