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Retirement and Postemployment Benefits (Weighted-Average Assumptions, Cost Trend Rates and Funded Status) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension Plan [Member]      
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract]      
Benefit obligations valuation discount rate 5.72% 5.93%  
Benefit obligations valuation rate of compensation increase 3.43% 3.43%  
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract]      
Net periodic benefit costs discount rate 5.93% 5.52% 5.52%
Net periodic benefit costs rate of compensation increase 3.43% 3.43% 3.43%
Net periodic benefit costs expected return on plan assets 8.25% 8.25% 8.25%
Assumed Health Care Cost Trend Rates (Details) [Abstract]      
Health care cost trend rate assumed for next year, obligations 7.50% 7.00% 6.25%
Health care cost trend rate assumed for next year, cost 7.00% 6.25% 6.50%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate), obligations 4.50% 5.00% 5.00%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate), cost 5.00% 5.00% 5.00%
Year that the rate reaches the ultimate trend rate, obligations 2038 2033 2029
Year that the rate reaches the ultimate trend rate, cost 2033 2029 2029
Change in Benefit Obligation [Roll Forward]      
Benefit Obligation, beginning of period $ 3,244 $ 3,454  
Service cost 31 35 $ 34
Interest cost 185 183 188
Participant contributions 0 0  
Plan Amendments (5) (13)  
Actuarial (gain) loss 77 (131)  
Gross benefits paid (297) (284)  
Benefit Obligation, end of period 3,235 3,244 3,454
Change in Plan Assets [Roll Forward]      
Balance at beginning of period 2,936 3,176  
Actual return on plan assets 338 34  
Employer contributions 10 10  
Participant contributions 0 0  
Gross benefits paid (297) (284)  
Balance at end of period 2,987 2,936 $ 3,176
Funded Status, end of period (248) (308)  
Amounts recognized in the Balance Sheets consist of: [Abstract]      
Noncurrent asset 44 19  
Current liability (11) (10)  
Noncurrent liability (281) (317)  
Net amount recognized, end of period (248) (308)  
Amounts recognized in AOCI and regulatory assets/liabilities (pre-tax): [Abstract]      
Prior service cost (credit) (11) (6)  
Net actuarial (gain) loss 1,173 1,164  
Total 1,162 1,158  
Total accumulated benefit obligation for defined benefit pension plans 3,105 3,116  
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract]      
AOCI 304 283  
Regulatory assets/liabilities 858 875  
Total 1,162 1,158  
Pension Plans Where the Projected or Accumulated Benefit Obligation Exceed the Fair Value of Plan Assets (Details) [Abstract]      
Projected benefit obligations 2,704 2,719  
Fair value of plan assets where the projected benefit obligations exceed the value of plan assets 2,412 2,392  
Accumulated benefit obligation 2,600 2,618  
Fair value of plan assets where the accumulated benefit obligations exceed the value of plan assets 2,412 2,392  
Pension Plan [Member] | U.S. [Member]      
Change in Benefit Obligation [Roll Forward]      
Federal subsidy 0 0  
Change in Plan Assets [Roll Forward]      
Transfer out $ 0 $ 0  
Other Postretirement Benefits Plan [Member]      
Weighted Average Assumptions Used in the Valuation of the Benefit Obligations (Details) [Abstract]      
Benefit obligations valuation discount rate 5.74% 5.91%  
Benefit obligations valuation rate of compensation increase 3.43% 3.44%  
Weighted Average Assumptions Used to Determine the Net Periodic Benefit Costs (Details) [Abstract]      
Net periodic benefit costs discount rate 5.91% 5.54% 5.54%
Net periodic benefit costs rate of compensation increase 3.44% 3.43% 3.43%
Net periodic benefit costs expected return on plan assets 7.27% 7.28% 7.38%
Change in Benefit Obligation [Roll Forward]      
Benefit Obligation, beginning of period $ 523 $ 538  
Service cost 6 6 $ 6
Interest cost 30 29 30
Participant contributions 8 8  
Plan Amendments 1 0  
Actuarial (gain) loss 20 (4)  
Gross benefits paid (51) (56)  
Federal subsidy 0 2  
Benefit Obligation, end of period 537 523 538
Change in Plan Assets [Roll Forward]      
Balance at beginning of period 417 438  
Actual return on plan assets 51 25  
Employer contributions 11 14  
Participant contributions 7 7  
Transfer out 0 (13)  
Gross benefits paid (54) (54)  
Balance at end of period 432 417 $ 438
Funded Status, end of period (105) (106)  
Amounts recognized in the Balance Sheets consist of: [Abstract]      
Noncurrent asset 9 8  
Current liability (10) (13)  
Noncurrent liability (104) (101)  
Net amount recognized, end of period (105) (106)  
Amounts recognized in AOCI and regulatory assets/liabilities (pre-tax): [Abstract]      
Prior service cost (credit) 8 9  
Net actuarial (gain) loss (86) (90)  
Total (78) (81)  
Changes in Plan Assets and Benefit Obligations Recognized in AOCI and Regulatory Assets/Liabilities by Type (Details) [Abstract]      
AOCI 18 16  
Regulatory assets/liabilities (96) (97)  
Total (78) (81)  
PPL Electric Utilities Corp [Member] | Pension Plan [Member] | PPL Services Funded Status Allocation [Member]      
Change in Plan Assets [Roll Forward]      
Funded Status, end of period (62) (83)  
PPL Electric Utilities Corp [Member] | Other Postretirement Benefits Plan [Member] | PPL Services Funded Status Allocation [Member]      
Change in Plan Assets [Roll Forward]      
Funded Status, end of period (53) (60)  
Louisville Gas And Electric Co [Member] | Pension Plan [Member] | LKE Funded Status Allocation [Member]      
Change in Plan Assets [Roll Forward]      
Funded Status, end of period 46 29  
Louisville Gas And Electric Co [Member] | Other Postretirement Benefits Plan [Member] | LKE Funded Status Allocation [Member]      
Change in Plan Assets [Roll Forward]      
Funded Status, end of period (46) (44)  
Kentucky Utilities Co [Member] | Pension Plan [Member] | LKE Funded Status Allocation [Member]      
Change in Plan Assets [Roll Forward]      
Funded Status, end of period 56 46  
Kentucky Utilities Co [Member] | Other Postretirement Benefits Plan [Member] | LKE Funded Status Allocation [Member]      
Change in Plan Assets [Roll Forward]      
Funded Status, end of period $ (10) $ (8)