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Income and Other Taxes (Deferred Tax Assets and Liabilities and Loss Carryforwards) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Before Income Taxes (Details) [Abstract]      
Income from Continuing Operations Before Income Taxes $ 1,472 $ 1,116 $ 924
Deferred Tax Assets      
Deferred investment tax credits 27 28  
Regulatory liabilities 186 133  
Income taxes due to customer 397 418  
Accrued pension and postretirement costs 99 112  
State loss carryforwards 181 224  
Contributions in aid of construction 206 163  
Leases 130 114  
Valuation allowances (184) (224)  
Total deferred tax assets 1,178 1,101  
Deferred Tax Liabilities      
Domestic plant - net 4,105 3,898  
Regulatory assets 432 432  
Prepayments 49 39  
Goodwill 52 38  
Domestic - other 37 38  
Total deferred tax liabilities 4,675 4,445  
Net deferred tax liability 3,497 3,344  
Loss carryforwards      
State loss carryforwards 181 224  
Deferred tax asset tax credit carryforwards 35 24  
Deferred Tax Assets, Goodwill and Intangible Assets 67 72  
Renewable Tax Credits Purchased 153 27 300
Deferred Tax Assets, Bad Debt 34 37  
Federal [Member] | General Business Tax Credit Carryforward [Member]      
Loss carryforwards      
Deferred tax asset tax credit carryforwards 2    
State [Member]      
Deferred Tax Assets      
State loss carryforwards 181    
Loss carryforwards      
Net operating losses 4,281    
Charitable contributions 1    
State loss carryforwards 181    
Charitable contribution carryforwards 0    
Loss carryforward valuation allowance on net operating losses (181)    
Charitable Contributions Loss Carryforwards valuation allowance 0    
State [Member] | General Business Tax Credit Carryforward [Member]      
Loss carryforwards      
Deferred tax asset tax credit carryforwards 2    
Foreign Tax Jurisdiction [Member]      
Deferred Tax Assets      
Foreign capital loss carryforwards 2    
Loss carryforwards      
Capital losses 8    
Foreign capital loss carryforwards 2    
Loss carryforward valuation allowance on capital losses (2)    
Other Noncurrent Assets [Member]      
Deferred Tax Liabilities      
Deferred Tax Assets, State Taxes 9 12  
PPL Electric Utilities Corp [Member]      
Income Before Income Taxes (Details) [Abstract]      
Income from Continuing Operations Before Income Taxes 843 750 687
Deferred Tax Assets      
Regulatory liabilities 57 40  
Income taxes due to customer 177 184  
Accrued pension and postretirement costs 29 36  
Contributions in aid of construction 156 120  
Leases 25 22  
Total deferred tax assets 444 402  
Deferred Tax Liabilities      
Domestic plant - net 2,028 1,934  
Regulatory assets 165 160  
Prepayments 30 30  
Domestic - other 2 4  
Total deferred tax liabilities 2,225 2,128  
Net deferred tax liability 1,781 1,726  
Louisville Gas And Electric Co [Member]      
Income Before Income Taxes (Details) [Abstract]      
Income from Continuing Operations Before Income Taxes 387 374 335
Deferred Tax Assets      
Deferred investment tax credits 7 7  
Regulatory liabilities 18 18  
Income taxes due to customer 104 110  
Deferred Tax Assets, Lease Liabilities 4 4  
Accrued pension and postretirement costs 0 4  
State tax credit carryforwards 5 6  
Contributions in aid of construction 17 18  
Leases 9 6  
Valuation allowances (5) (6)  
Total deferred tax assets 159 167  
Deferred Tax Liabilities      
Domestic plant - net 884 875  
Regulatory assets 87 88  
Lease right-of-use assets 4 4  
Domestic - other 3 3  
Total deferred tax liabilities 978 970  
Net deferred tax liability 819 803  
Louisville Gas And Electric Co [Member] | Federal [Member] | General Business Tax Credit Carryforward [Member]      
Deferred Tax Assets      
State tax credit carryforwards 5    
Valuation allowances (5)    
Kentucky Utilities Co [Member]      
Income Before Income Taxes (Details) [Abstract]      
Income from Continuing Operations Before Income Taxes 497 445 $ 389
Deferred Tax Assets      
Deferred investment tax credits 20 20  
Regulatory liabilities 31 29  
Income taxes due to customer 117 124  
Deferred Tax Assets, Lease Liabilities 7 6  
State tax credit carryforwards 3 4  
Contributions in aid of construction 17 12  
Leases 8 4  
Valuation allowances (1) (2)  
Total deferred tax assets 202 197  
Deferred Tax Liabilities      
Domestic plant - net 1,085 1,053  
Regulatory assets 56 55  
Accrued pension and postretirement costs 8 6  
Lease right-of-use assets 7 6  
Domestic - other 2 1  
Total deferred tax liabilities 1,158 1,121  
Net deferred tax liability 956 $ 924  
Kentucky Utilities Co [Member] | Federal [Member] | General Business Tax Credit Carryforward [Member]      
Deferred Tax Assets      
State tax credit carryforwards 3    
Valuation allowances $ (1)