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Goodwill and Other Intangible Assets (Other Intangibles - Finite-Lived) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Subject to amortization: [Abstract]      
Gross carrying amount $ 596 $ 579  
Accumulated amortization 263 263  
Contracts [Member]      
Subject to amortization: [Abstract]      
Gross carrying amount 125 125  
Accumulated amortization 124 116  
Land Rights And Easements [Member]      
Subject to amortization: [Abstract]      
Gross carrying amount 445 432  
Accumulated amortization 139 147  
Licenses And Other [Member]      
Subject to amortization: [Abstract]      
Gross carrying amount 2 2  
Accumulated amortization 0 0  
Intangible assets with no regulatory offset [Member]      
Subject to amortization: [Abstract]      
Amortization expense 5 5 $ 5
Forecasted amortization in 2021 5    
Forecasted amortization in 2022 5    
Forecasted amortization in 2023 5    
Forecasted amortization in 2024 5    
Forecasted amortization in 2025 5    
Intangible assets with regulatory offset [Member]      
Subject to amortization: [Abstract]      
Amortization expense 8 8 9
Forecasted amortization in 2021 1    
Forecasted amortization in 2022 0    
Forecasted amortization in 2023 0    
Forecasted amortization in 2024 0    
Forecasted amortization in 2025 0    
Other Intangibles Excluding Emission Allowances And Or Renewable Energy Credits [Member]      
Subject to amortization: [Abstract]      
Amortization expense 13 13 14
Forecasted amortization in 2021 6    
Forecasted amortization in 2022 5    
Forecasted amortization in 2023 5    
Forecasted amortization in 2024 5    
Forecasted amortization in 2025 5    
Renewable energy credit      
Subject to amortization: [Abstract]      
Gross carrying amount 24 20  
Accumulated amortization 0 0  
PPL Electric Utilities Corp [Member]      
Subject to amortization: [Abstract]      
Gross carrying amount 410 398  
Accumulated amortization 146 142  
PPL Electric Utilities Corp [Member] | Land Rights And Easements [Member]      
Subject to amortization: [Abstract]      
Gross carrying amount 408 396  
Accumulated amortization 145 141  
PPL Electric Utilities Corp [Member] | Licenses And Other [Member]      
Subject to amortization: [Abstract]      
Gross carrying amount 2 2  
Accumulated amortization 1 1  
PPL Electric Utilities Corp [Member] | Intangible assets with no regulatory offset [Member]      
Subject to amortization: [Abstract]      
Amortization expense 4 4 4
Forecasted amortization in 2021 4    
Forecasted amortization in 2022 4    
Forecasted amortization in 2023 4    
Forecasted amortization in 2024 4    
Forecasted amortization in 2025 4    
Louisville Gas And Electric Co [Member]      
Subject to amortization: [Abstract]      
Gross carrying amount 94 93  
Accumulated amortization 83 81  
Louisville Gas And Electric Co [Member] | Land Rights And Easements [Member]      
Subject to amortization: [Abstract]      
Gross carrying amount 8 7  
Accumulated amortization (2) 2  
Louisville Gas And Electric Co [Member] | OVEC power purchase agreement [Member]      
Subject to amortization: [Abstract]      
Gross carrying amount 86 86  
Accumulated amortization 85 79  
Louisville Gas And Electric Co [Member] | Intangible assets with regulatory offset [Member]      
Subject to amortization: [Abstract]      
Amortization expense 6 6 6
Kentucky Utilities Co [Member]      
Subject to amortization: [Abstract]      
Gross carrying amount 69 68  
Accumulated amortization 35 40  
Kentucky Utilities Co [Member] | Land Rights And Easements [Member]      
Subject to amortization: [Abstract]      
Gross carrying amount 30 29  
Accumulated amortization (3) 4  
Kentucky Utilities Co [Member] | OVEC power purchase agreement [Member]      
Subject to amortization: [Abstract]      
Gross carrying amount 39 39  
Accumulated amortization 38 36  
Kentucky Utilities Co [Member] | Intangible assets with regulatory offset [Member]      
Subject to amortization: [Abstract]      
Amortization expense $ 2 $ 2 $ 3