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Retirement and Postemployment Benefits (Net Period Defined Benefit Costs (Credits) and Other Changes in Plan Assets and Benefit Obligations) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Pension Plan [Member]      
Net Periodic Defined Benefit Costs (Credits): [ Abstract]      
Service cost $ 31 $ 35 $ 34
Interest cost 185 183 188
Expected return on plan assets (287) (299) (309)
Amortization of:      
Prior service cost (credit) 0 3 6
Actuarial (gain) loss 18 10 2
Net Periodic Defined Benefit Costs (Credits) (53) (68) (79)
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross: [Abstract]      
Net (gain) loss 27 134 193
Prior service costs (credit) (5) (13) 2
Amortization of: [Abstract]      
Prior service (cost) credit 0 (3) (6)
Actuarial gain (loss) (18) (10) (2)
Total recognized in OCI and regulatory assets/liabilities 4 108 187
Total recognized in net periodic benefit costs, OCI and regulatory assets/liabilities (49) 40 108
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross (Details) [Abstract]      
OCI 21 25 52
Regulatory assets/liabilities (17) 83 135
Total recognized in OCI and regulatory assets/liabilities 4 108 187
Net Periodic Defined Benefit Costs (Credits) Charged to Operating Expense or Regulatory Assets, Excluding Amounts Charged to Construction and Other Non-expense Accounts (Details) [Abstract]      
Net periodic defined benefit costs (credits) charged to operating expense or regulatory assets, excluding amounts charged to construction and other non-expense accounts 12 40
Other Postretirement Benefits Plan [Member]      
Net Periodic Defined Benefit Costs (Credits): [ Abstract]      
Service cost 6 6 6
Interest cost 30 29 30
Expected return on plan assets (30) (30) (30)
Amortization of:      
Prior service cost (credit) 2 1 1
Actuarial (gain) loss (4) (5) (5)
Net Periodic Defined Benefit Costs (Credits) 4 1 2
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross: [Abstract]      
Net (gain) loss 0 1 (6)
Prior service costs (credit) 2 0 0
Amortization of: [Abstract]      
Prior service (cost) credit (2) (1) (1)
Actuarial gain (loss) 4 5 5
Total recognized in OCI and regulatory assets/liabilities 4 5 (2)
Total recognized in net periodic benefit costs, OCI and regulatory assets/liabilities 8 6 0
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross (Details) [Abstract]      
OCI 2 2 0
Regulatory assets/liabilities 2 3 (2)
Total recognized in OCI and regulatory assets/liabilities 4 5 (2)
Net Periodic Defined Benefit Costs (Credits) Charged to Operating Expense or Regulatory Assets, Excluding Amounts Charged to Construction and Other Non-expense Accounts (Details) [Abstract]      
Net periodic defined benefit costs (credits) charged to operating expense or regulatory assets, excluding amounts charged to construction and other non-expense accounts (1) 4
PPL Electric Utilities Corp [Member] | Pension Plan [Member]      
Net Periodic Defined Benefit Costs (Credits) Charged to Operating Expense or Regulatory Assets, Excluding Amounts Charged to Construction and Other Non-expense Accounts (Details) [Abstract]      
Net periodic defined benefit costs (credits) charged to operating expense or regulatory assets, excluding amounts charged to construction and other non-expense accounts (9) (2)
PPL Electric Utilities Corp [Member] | Other Postretirement Benefits Plan [Member]      
Net Periodic Defined Benefit Costs (Credits) Charged to Operating Expense or Regulatory Assets, Excluding Amounts Charged to Construction and Other Non-expense Accounts (Details) [Abstract]      
Net periodic defined benefit costs (credits) charged to operating expense or regulatory assets, excluding amounts charged to construction and other non-expense accounts (1) 2
Louisville Gas And Electric Co [Member] | Pension Plan [Member]      
Net Periodic Defined Benefit Costs (Credits) Charged to Operating Expense or Regulatory Assets, Excluding Amounts Charged to Construction and Other Non-expense Accounts (Details) [Abstract]      
Net periodic defined benefit costs (credits) charged to operating expense or regulatory assets, excluding amounts charged to construction and other non-expense accounts 0 (1) 4
Louisville Gas And Electric Co [Member] | Other Postretirement Benefits Plan [Member]      
Net Periodic Defined Benefit Costs (Credits) Charged to Operating Expense or Regulatory Assets, Excluding Amounts Charged to Construction and Other Non-expense Accounts (Details) [Abstract]      
Net periodic defined benefit costs (credits) charged to operating expense or regulatory assets, excluding amounts charged to construction and other non-expense accounts 2 2 2
Kentucky Utilities Co [Member] | Pension Plan [Member]      
Net Periodic Defined Benefit Costs (Credits) Charged to Operating Expense or Regulatory Assets, Excluding Amounts Charged to Construction and Other Non-expense Accounts (Details) [Abstract]      
Net periodic defined benefit costs (credits) charged to operating expense or regulatory assets, excluding amounts charged to construction and other non-expense accounts (3) (3) (1)
Kentucky Utilities Co [Member] | Other Postretirement Benefits Plan [Member]      
Net Periodic Defined Benefit Costs (Credits) Charged to Operating Expense or Regulatory Assets, Excluding Amounts Charged to Construction and Other Non-expense Accounts (Details) [Abstract]      
Net periodic defined benefit costs (credits) charged to operating expense or regulatory assets, excluding amounts charged to construction and other non-expense accounts $ 0 $ 0 $ 0