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, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Plan [Member]
Net Periodic Defined Benefit Costs (Credits): [ Abstract]
Service cost	$ 34	$ 51	$ 56
Interest cost	188	144	121
Expected return on plan assets	(309)	(276)	(255)
Amortization of:
Prior service cost (credit)	6	8	8
Actuarial (gain) loss	2	51	93
Net periodic defined benefit costs (credits) prior to settlements and termination benefits	(79)	(22)	23
Settlements	0	23	18
Net Periodic Defined Benefit Costs (Credits)	(79)	1	41
Net (loss)/gain allocated at acquisition	0	33	0
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross: [Abstract]
Settlement	0	(23)	(18)
Net (gain) loss	193	242	42
Prior service costs (credit)	2	0	3
Amortization of: [Abstract]
Prior service (cost) credit	(6)	(8)	(8)
Actuarial gain (loss)	(2)	(51)	(93)
Total recognized in OCI and regulatory assets/liabilities	187	193	(74)
Total recognized in net periodic benefit costs, OCI and regulatory assets/liabilities	108	194	(33)
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross (Details) [Abstract]
OCI	52	142	(70)
Regulatory assets/liabilities	135	51	(4)
Total recognized in OCI and regulatory assets/liabilities	187	193	(74)
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	7	6
Interest cost	30	20	16
Expected return on plan assets	(30)	(28)	(23)
Amortization of:
Prior service cost (credit)	1	1	1
Actuarial (gain) loss	(5)	(5)	(1)
Net periodic defined benefit costs (credits) prior to settlements and termination benefits	2	(5)	(1)
Settlements	0	0	0
Net Periodic Defined Benefit Costs (Credits)	2	(5)	(1)
Net (loss)/gain allocated at acquisition	0	(49)	0
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross: [Abstract]
Settlement	0	0	0
Net (gain) loss	(6)	0	(53)
Prior service costs (credit)	0	0	0
Amortization of: [Abstract]
Prior service (cost) credit	(1)	(1)	(1)
Actuarial gain (loss)	5	5	1
Total recognized in OCI and regulatory assets/liabilities	(2)	(45)	(53)
Total recognized in net periodic benefit costs, OCI and regulatory assets/liabilities	0	(50)	(54)
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross (Details) [Abstract]
OCI	0	13	(42)
Regulatory assets/liabilities	(2)	(58)	(11)
Total recognized in OCI and regulatory assets/liabilities	(2)	(45)	(53)
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