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Retirement and Postemployment Benefits (Savings Plans and Employee Stock Ownership Plan) (Details) - Deferred Savings Plans 401K [Member] - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Contribution Pension And Other Postretirement Plans [Line Items]      
Employer contributions to deferred savings plans $ 60 $ 53 $ 48
PPL Electric Utilities Corp [Member]      
Defined Contribution Pension And Other Postretirement Plans [Line Items]      
Employer contributions to deferred savings plans 10 9 8
Louisville Gas And Electric Co [Member]      
Defined Contribution Pension And Other Postretirement Plans [Line Items]      
Employer contributions to deferred savings plans 10 8 8
Kentucky Utilities Co [Member]      
Defined Contribution Pension And Other Postretirement Plans [Line Items]      
Employer contributions to deferred savings plans $ 8 $ 6 $ 6