Income and Other Taxes (Deferred Tax Assets and Liabilities and Loss Carryforwards) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Before Income Taxes (Details) [Abstract]
Income from Continuing Operations Before Income Taxes	$ 1,116	$ 924	$ 915
Deferred Tax Assets
Deferred investment tax credits	28	28
Regulatory liabilities	133	123
Income taxes due to customer	418	436
Accrued pension and postretirement costs	112	101
State loss carryforwards	224	253
Contributions in aid of construction	163	149
Leases	114	111
Valuation allowances	(224)	(245)
Total deferred tax assets	1,101	1,129
Deferred Tax Liabilities
Domestic plant - net	3,898	3,749
Regulatory assets	432	376
Prepayments	39	47
Goodwill	38	22
Domestic - other	38	30
Total deferred tax liabilities	4,445	4,224
Net deferred tax liability	3,344	3,095
Loss carryforwards
State loss carryforwards	224	253
Deferred tax asset tax credit carryforwards	24	67
Deferred Tax Assets, Goodwill and Intangible Assets	72	78
Renewable Tax Credits Purchased		300
Deferred Tax Assets, Bad Debt	37	28
Federal [Member] | General Business Tax Credit Carryforward [Member]
Loss carryforwards
Deferred tax asset tax credit carryforwards	14
State [Member]
Deferred Tax Assets
State loss carryforwards	224
Loss carryforwards
Net operating losses	5,011
Charitable contributions	10
State loss carryforwards	224
Charitable contribution carryforwards	1
Loss carryforward valuation allowance on net operating losses	(221)
Charitable Contributions Loss Carryforwards valuation allowance	(1)
State [Member] | General Business Tax Credit Carryforward [Member]
Loss carryforwards
Deferred tax asset tax credit carryforwards	2
Foreign Tax Jurisdiction [Member]
Deferred Tax Assets
Foreign capital loss carryforwards	2
Loss carryforwards
Capital losses	8
Foreign capital loss carryforwards	2
Loss carryforward valuation allowance on capital losses	(2)
Other Noncurrent Assets [Member]
Deferred Tax Liabilities
Deferred Tax Assets, State Taxes	12	9
PPL Electric Utilities Corp [Member]
Income Before Income Taxes (Details) [Abstract]
Income from Continuing Operations Before Income Taxes	750	687	699
Deferred Tax Assets
Regulatory liabilities	40	43
Income taxes due to customer	184	191
Accrued pension and postretirement costs	36	30
Contributions in aid of construction	120	105
Leases	22	27
Total deferred tax assets	402	396
Deferred Tax Liabilities
Domestic plant - net	1,934	1,810
Regulatory assets	160	119
Prepayments	30	36
Domestic - other	4	4
Total deferred tax liabilities	2,128	1,969
Net deferred tax liability	1,726	1,573
Louisville Gas And Electric Co [Member]
Income Before Income Taxes (Details) [Abstract]
Income from Continuing Operations Before Income Taxes	374	335	335
Deferred Tax Assets
Deferred investment tax credits	7	8
Regulatory liabilities	18	19
Income taxes due to customer	110	115
Deferred Tax Assets, Lease Liabilities	4	4
Accrued pension and postretirement costs	4	3
State tax credit carryforwards	6	8
Contributions in aid of construction	18	18
Leases	6	8
Valuation allowances	(6)	(8)
Total deferred tax assets	167	175
Deferred Tax Liabilities
Domestic plant - net	875	877
Regulatory assets	88	67
Lease right-of-use assets	4	3
Domestic - other	3	4
Total deferred tax liabilities	970	951
Net deferred tax liability	803	776
Louisville Gas And Electric Co [Member] | Federal [Member] | General Business Tax Credit Carryforward [Member]
Deferred Tax Assets
State tax credit carryforwards	6
Valuation allowances	(6)
Kentucky Utilities Co [Member]
Income Before Income Taxes (Details) [Abstract]
Income from Continuing Operations Before Income Taxes	445	389	$ 398
Deferred Tax Assets
Deferred investment tax credits	20	21
Regulatory liabilities	29	23
Income taxes due to customer	124	131
Deferred Tax Assets, Lease Liabilities	6	5
State tax credit carryforwards	4	4
Contributions in aid of construction	12	10
Leases	4	5
Valuation allowances	(2)	(2)
Total deferred tax assets	197	197
Deferred Tax Liabilities
Domestic plant - net	1,053	1,045
Regulatory assets	55	50
Accrued pension and postretirement costs	6	7
Lease right-of-use assets	6	5
Domestic - other	1	2
Total deferred tax liabilities	1,121	1,109
Net deferred tax liability	924	$ 912
Kentucky Utilities Co [Member] | Federal [Member] | General Business Tax Credit Carryforward [Member]
Deferred Tax Assets
State tax credit carryforwards	4
Valuation allowances	$ (2)