Income and Other Taxes (Deferred Tax Assets and Liabilities and Loss Carryforwards) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Before Income Taxes (Details) [Abstract]
Income from Continuing Operations Before Income Taxes	$ 924	$ 915	$ 521
Deferred Tax Assets
Deferred investment tax credits	28	29
Regulatory liabilities	123	88
Income taxes due to customer	436	448
Accrued pension and postretirement costs	101	86
State loss carryforwards	253	230
Contributions in aid of construction	149	114
Leases	139	87
Valuation allowances	(245)	(213)
Total deferred tax assets	1,129	1,022
Deferred Tax Liabilities
Domestic plant - net	3,749	3,609
Regulatory assets	376	337
Prepayments	47	46
Goodwill	22	7
Domestic - other	30	23
Total deferred tax liabilities	4,224	4,022
Net deferred tax liability	3,095	3,000
Loss carryforwards
State loss carryforwards	253	230
Deferred tax asset tax credit carryforwards	67	68
Deferred Tax Assets, Goodwill and Intangible Assets	78	85
Renewable Tax Credits Purchased	300
Federal [Member] | General Business Tax Credit Carryforward [Member]
Loss carryforwards
Deferred tax asset tax credit carryforwards	5
State [Member]
Deferred Tax Assets
State loss carryforwards	253
Loss carryforwards
Net operating losses	5,475
Charitable contributions	10
State loss carryforwards	253
Charitable contribution carryforwards	1
Loss carryforward valuation allowance on net operating losses	(243)
Charitable Contributions Loss Carryforwards valuation allowance	(1)
State [Member] | General Business Tax Credit Carryforward [Member]
Loss carryforwards
Deferred tax asset tax credit carryforwards	1
Other Noncurrent Assets [Member]
Deferred Tax Liabilities
Deferred Tax Assets, State Taxes	9	6
PPL Electric Utilities Corp [Member]
Income Before Income Taxes (Details) [Abstract]
Income from Continuing Operations Before Income Taxes	687	699	599
Deferred Tax Assets
Regulatory liabilities	43	36
Income taxes due to customer	191	193
Accrued pension and postretirement costs	30	27
Contributions in aid of construction	105	87
Leases	27	18
Total deferred tax assets	396	361
Deferred Tax Liabilities
Domestic plant - net	1,810	1,745
Regulatory assets	119	93
Prepayments	36	35
Domestic - other	4	2
Total deferred tax liabilities	1,969	1,875
Net deferred tax liability	1,573	1,514
Louisville Gas And Electric Co [Member]
Income Before Income Taxes (Details) [Abstract]
Income from Continuing Operations Before Income Taxes	335	335	303
Deferred Tax Assets
Deferred investment tax credits	8	8
Regulatory liabilities	19	18
Income taxes due to customer	115	119
Deferred Tax Assets, Lease Liabilities	4	4
Accrued pension and postretirement costs	3	0
State tax credit carryforwards	8	9
Contributions in aid of construction	18	17
Leases	8	8
Valuation allowances	(8)	(9)
Total deferred tax assets	175	174
Deferred Tax Liabilities
Domestic plant - net	877	869
Regulatory assets	67	69
Lease right-of-use assets	3	3
Domestic - other	4	4
Total deferred tax liabilities	951	945
Net deferred tax liability	776	771
Louisville Gas And Electric Co [Member] | Federal [Member] | General Business Tax Credit Carryforward [Member]
Deferred Tax Assets
State tax credit carryforwards	8
Valuation allowances	(8)
Kentucky Utilities Co [Member]
Income Before Income Taxes (Details) [Abstract]
Income from Continuing Operations Before Income Taxes	389	398	$ 363
Deferred Tax Assets
Deferred investment tax credits	21	21
Regulatory liabilities	23	23
Income taxes due to customer	131	136
Deferred Tax Assets, Lease Liabilities	5	5
State tax credit carryforwards	4	4
Contributions in aid of construction	10	9
Leases	5	4
Valuation allowances	(2)	(3)
Total deferred tax assets	197	199
Deferred Tax Liabilities
Domestic plant - net	1,045	1,028
Regulatory assets	50	56
Accrued pension and postretirement costs	7	6
Lease right-of-use assets	5	5
Domestic - other	2	0
Total deferred tax liabilities	1,109	1,095
Net deferred tax liability	912	$ 896
Kentucky Utilities Co [Member] | Federal [Member] | General Business Tax Credit Carryforward [Member]
Deferred Tax Assets
State tax credit carryforwards	4
Valuation allowances	$ (2)