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, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Plan [Member]
Net Periodic Defined Benefit Costs (Credits): [ Abstract]
Service cost	$ 35	$ 34	$ 51
Interest cost	183	188	144
Expected return on plan assets	(299)	(309)	(276)
Amortization of:
Prior service cost (credit)	3	6	8
Actuarial (gain) loss	10	2	51
Net periodic defined benefit costs (credits) prior to settlements and termination benefits	(68)	(79)	(22)
Settlements	0	0	23
Net Periodic Defined Benefit Costs (Credits)	(68)	(79)	1
Net (loss)/gain allocated at acquisition	0	0	33
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross: [Abstract]
Settlement	0	0	(23)
Net (gain) loss	134	193	242
Prior service costs (credit)	(13)	2	0
Amortization of: [Abstract]
Prior service (cost) credit	(3)	(6)	(8)
Actuarial gain (loss)	(10)	(2)	(51)
Total recognized in OCI and regulatory assets/liabilities	108	187	193
Total recognized in net periodic benefit costs, OCI and regulatory assets/liabilities	40	108	194
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross (Details) [Abstract]
OCI	25	52	142
Regulatory assets/liabilities	83	135	51
Total recognized in OCI and regulatory assets/liabilities	108	187	193
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	7
Interest cost	29	30	20
Expected return on plan assets	(30)	(30)	(28)
Amortization of:
Prior service cost (credit)	1	1	1
Actuarial (gain) loss	(5)	(5)	(5)
Net periodic defined benefit costs (credits) prior to settlements and termination benefits	1	2	(5)
Settlements	0	0	0
Net Periodic Defined Benefit Costs (Credits)	1	2	(5)
Net (loss)/gain allocated at acquisition	0	0	(49)
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross: [Abstract]
Settlement	0	0	0
Net (gain) loss	1	(6)	0
Prior service costs (credit)	0	0	0
Amortization of: [Abstract]
Prior service (cost) credit	(1)	(1)	(1)
Actuarial gain (loss)	5	5	5
Total recognized in OCI and regulatory assets/liabilities	5	(2)	(45)
Total recognized in net periodic benefit costs, OCI and regulatory assets/liabilities	6	0	(50)
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross (Details) [Abstract]
OCI	2	0	13
Regulatory assets/liabilities	3	(2)	(58)
Total recognized in OCI and regulatory assets/liabilities	5	(2)	(45)
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