Income and Other Taxes (Deferred Tax Assets and Liabilities and Loss Carryforwards) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Before Income Taxes (Details) [Abstract]
Income from Continuing Operations Before Income Taxes	$ 915	$ 521	$ 954
Deferred Tax Assets
Deferred investment tax credits	29	30
Regulatory liabilities	88	94
Income taxes due to customer	448	422
Accrued pension and postretirement costs	86	75
State loss carryforwards	230	483
Deferred Tax Assets, Leases	15	67
Contributions in aid of construction	114	120
Leases	72	84
Valuation allowances	(213)	(462)
Total deferred tax assets	1,022	928
Deferred Tax Liabilities
Domestic plant - net	3,609	3,812
Regulatory assets	337	180
Deferred Tax Liabilities Prepayments	46	0
Domestic - other	30	75
Total deferred tax liabilities	4,022	4,067
Net deferred tax liability	3,000	3,139
Loss carryforwards
State loss carryforwards	230	483
Deferred tax asset tax credit carryforwards	68	15
Deferred Tax Assets, Goodwill and Intangible Assets	85	0
Federal [Member] | General Business Tax Credit Carryforward [Member]
Loss carryforwards
Deferred tax asset tax credit carryforwards	3
State [Member]
Deferred Tax Assets
State loss carryforwards	230
Loss carryforwards
Net operating losses	5,830
State loss carryforwards	230
Loss carryforward valuation allowance on net operating losses	(213)
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	6	12
PPL Electric Utilities Corp [Member]
Income Before Income Taxes (Details) [Abstract]
Income from Continuing Operations Before Income Taxes	699	599	664
Deferred Tax Assets
Regulatory liabilities	36	52
Income taxes due to customer	193	154
Accrued pension and postretirement costs	27	14
Contributions in aid of construction	87	95
Leases	18	21
Total deferred tax assets	361	336
Deferred Tax Liabilities
Domestic plant - net	1,745	1,891
Regulatory assets	93	74
Deferred Tax Liabilities Prepayments	35	0
Domestic - other	2	39
Total deferred tax liabilities	1,875	2,004
Net deferred tax liability	1,514	1,668
Louisville Gas And Electric Co [Member]
Income Before Income Taxes (Details) [Abstract]
Income from Continuing Operations Before Income Taxes	335	303	306
Deferred Tax Assets
Deferred investment tax credits	8	8
Regulatory liabilities	18	18
Income taxes due to customer	119	125
Deferred Tax Assets, Lease Liabilities	4	4
State tax credit carryforwards	9	11
Contributions in aid of construction	17	15
Leases	8	11
Valuation allowances	(9)	(11)
Total deferred tax assets	174	181
Deferred Tax Liabilities
Domestic plant - net	869	854
Regulatory assets	69	65
Lease right-of-use assets	3	4
Domestic - other	4	9
Total deferred tax liabilities	945	932
Net deferred tax liability	771	751
Louisville Gas And Electric Co [Member] | Federal [Member] | General Business Tax Credit Carryforward [Member]
Deferred Tax Assets
State tax credit carryforwards	9
Valuation allowances	(9)
Kentucky Utilities Co [Member]
Income Before Income Taxes (Details) [Abstract]
Income from Continuing Operations Before Income Taxes	398	363	$ 343
Deferred Tax Assets
Deferred investment tax credits	21	22
Regulatory liabilities	23	23
Income taxes due to customer	136	143
Deferred Tax Assets, Lease Liabilities	5	7
State tax credit carryforwards	4	4
Contributions in aid of construction	9	9
Leases	4	4
Valuation allowances	(3)	(3)
Total deferred tax assets	199	209
Deferred Tax Liabilities
Domestic plant - net	1,028	1,012
Regulatory assets	56	41
Accrued pension and postretirement costs	6	13
Lease right-of-use assets	5	6
Domestic - other	0	2
Total deferred tax liabilities	1,095	1,074
Net deferred tax liability	896	$ 865
Kentucky Utilities Co [Member] | Federal [Member] | General Business Tax Credit Carryforward [Member]
Deferred Tax Assets
State tax credit carryforwards	4
Valuation allowances	$ (3)