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, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan [Member]
Net Periodic Defined Benefit Costs (Credits): [ Abstract]
Service cost	$ 51	$ 56	$ 56
Interest cost	144	121	146
Expected return on plan assets	(276)	(255)	(246)
Amortization of:
Prior service cost (credit)	8	8	9
Actuarial (gain) loss	51	93	89
Net periodic defined benefit costs (credits) prior to settlements and termination benefits	(22)	23	54
Settlements	23	18	23
Net Periodic Defined Benefit Costs (Credits)	1	41	77
Net (loss)/gain allocated at acquisition	33	0	0
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross: [Abstract]
Settlement	(23)	(18)	(23)
Net (gain) loss	242	42	(221)
Prior service costs (credit)	0	3	1
Amortization of: [Abstract]
Prior service (cost) credit	(8)	(8)	(9)
Actuarial gain (loss)	(51)	(93)	(89)
Total recognized in OCI and regulatory assets/liabilities	193	(74)	(341)
Total recognized in net periodic benefit costs, OCI and regulatory assets/liabilities	194	(33)	(264)
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross (Details) [Abstract]
OCI	142	(70)	(428)
Regulatory assets/liabilities	51	(4)	87
Total recognized in OCI and regulatory assets/liabilities	193	(74)	(341)
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	7	6	6
Interest cost	20	16	19
Expected return on plan assets	(28)	(23)	(21)
Amortization of:
Prior service cost (credit)	1	1	1
Actuarial (gain) loss	(5)	(1)	0
Net periodic defined benefit costs (credits) prior to settlements and termination benefits	(5)	(1)	5
Settlements	0	0	0
Net Periodic Defined Benefit Costs (Credits)	(5)	(1)	5
Net (loss)/gain allocated at acquisition	(49)	0	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	0	(53)	(6)
Prior service costs (credit)	0	0	5
Amortization of: [Abstract]
Prior service (cost) credit	(1)	(1)	(1)
Actuarial gain (loss)	5	1	0
Total recognized in OCI and regulatory assets/liabilities	(45)	(53)	(2)
Total recognized in net periodic benefit costs, OCI and regulatory assets/liabilities	(50)	(54)	3
Other Changes in Plan Assets and Benefit Obligations Recognized in OCI and Regulatory Assets/Liabilities - Gross (Details) [Abstract]
OCI	13	(42)	(12)
Regulatory assets/liabilities	(58)	(11)	10
Total recognized in OCI and regulatory assets/liabilities	(45)	(53)	(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