Income and Other Taxes (Income Tax Expense and Reconciliation of Income Tax Expense) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Expense (Benefit)
Current - Federal		$ (2)	$ (1)	$ (8)
Current - State		24	36	24
Current - Foreign		0	(1)	(2)
Total Current Expense		22	34	14
Deferred - Federal		122	28	135
Deferred - State		68	105	94
Deferred - Foreign		0	383	101
Total Deferred Expense (Benefit), excluding operating loss carry forwards		190	516	330
Amortization of investment tax credit		(3)	(3)	(3)
Tax expense (benefit) of operating loss carryforwards [Abstract]
Deferred - Federal		2	12	6
Deferred - State		(10)	(56)	(33)
Total Tax Expense (Benefit) of Operating Loss Carryforwards		(8)	(44)	(27)
Total income tax from continuing operations		201	503	314
Income tax expense [Abstract]
Total income tax expense - Federal		119	36	130
Total income tax expense - State		82	85	85
Total income tax expense - Foreign		0	382	99
Total income tax from continuing operations		201	503	314
Income Tax Expense (Benefit) Excluded From Income Taxes [Abstract]
Income tax related to other comprehensive income		11	150	(19)
Total income tax expense (benefits) excluded from income taxes from continuing operations		(31)	1,569	169
Reconciliation of Income Tax Expense
Federal income tax on Income Before Income Taxes at statutory tax rate		192	109	200
Increase (decrease) due to:
State income taxes, net of federal income tax benefit		68	23	48
Valuation allowance adjustments		9	48	24
Federal and state income tax return adjustments		(1)	(3)	(9)
Impact of the United Kingdom Finance Acts on deferred tax balances		0	383	101
Depreciation and other items not normalized		(8)	(5)	(5)
Amortization of excess deferred federal and state income taxes		(54)	(54)	(43)
Other		(10)	(4)	(9)
Total increase (decrease)		9	394	114
Total income tax from continuing operations		$ 201	$ 503	$ 314
Effective income tax rate		22.00%	96.50%	32.90%
Expense related to increased Pennsylvania net operating loss carryforwards expected to be unutilized		$ 5	$ 15	$ 24
Taxes, other than income
State gross receipts		175	113	100
Domestic property and other		157	94	80
Total		332	207	180
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, U.K. Finance Act 2020, Amount				106
Deferred Tax Assets, Valuation Allowances		213	462
Reclassification from AOCI due to sale of UK utility business		0	660	0
Nondeductible officers salary		5	6	7
Deferred Tax Benefit
Taxes, other than income
Effective Income Tax Rate Reconciliation, Change in Enacted State Tax Rate, Amount	$ 5
WPD [Member]
Taxes, other than income
Income tax related to Discontinued Operations		(42)	759	188
Foreign Tax Authority [Member]
Income Tax Expense (Benefit)
Deferred - Foreign				106
PPL Electric Utilities Corp [Member]
Income Tax Expense (Benefit)
Current - Federal		63	40	61
Current - State		20	35	23
Total Current Expense		83	75	84
Deferred - Federal		60	59	45
Deferred - State		31	20	38
Total Deferred Expense (Benefit), excluding operating loss carry forwards		91	79	83
Tax expense (benefit) of operating loss carryforwards [Abstract]
Total income tax from continuing operations		174	154	167
Income tax expense [Abstract]
Total income tax expense - Federal		123	99	106
Total income tax expense - State		51	55	61
Total income tax from continuing operations		174	154	167
Reconciliation of Income Tax Expense
Federal income tax on Income Before Income Taxes at statutory tax rate		147	126	139
Increase (decrease) due to:
State income taxes, net of federal income tax benefit		54	46	52
Federal and state income tax return adjustments		(1)	0	(4)
Depreciation and other items not normalized		(7)	(5)	(5)
Amortization of excess deferred federal and state income taxes		(12)	(14)	(16)
Other		2	1	1
Total increase (decrease)		27	28	28
Total income tax from continuing operations		$ 174	$ 154	$ 167
Effective income tax rate		24.90%	25.70%	25.20%
Taxes, other than income
State gross receipts		$ 142	$ 113	$ 100
Domestic property and other		7	7	7
Total		149	120	107
Effective Income Tax Rate Reconciliation, Change in Enacted State Tax Rate, Amount		(9)	0	0
PPL Electric Utilities Corp [Member] | Deferred Tax Benefit
Taxes, other than income
Effective Income Tax Rate Reconciliation, Change in Enacted State Tax Rate, Amount	$ 9	9
Louisville Gas And Electric Co [Member]
Income Tax Expense (Benefit)
Current - Federal		60	41	53
Current - State		9	5	7
Total Current Expense		69	46	60
Deferred - Federal		(10)	1	(4)
Deferred - State		5	8	7
Total Deferred Expense (Benefit), excluding operating loss carry forwards		(5)	9	3
Amortization of investment tax credit		(1)	(1)	(1)
Tax expense (benefit) of operating loss carryforwards [Abstract]
Total income tax from continuing operations		63	54	62
Income tax expense [Abstract]
Total income tax expense - Federal		49	41	48
Total income tax expense - State		14	13	14
Total income tax from continuing operations		63	54	62
Reconciliation of Income Tax Expense
Federal income tax on Income Before Income Taxes at statutory tax rate		70	64	64
Increase (decrease) due to:
State income taxes, net of federal income tax benefit		13	12	12
Amortization of excess deferred federal and state income taxes		(18)	(20)	(11)
Other		(2)	(2)	(3)
Total increase (decrease)		(7)	(10)	(2)
Total income tax from continuing operations		$ 63	$ 54	$ 62
Effective income tax rate		18.80%	17.80%	20.30%
Taxes, other than income
Domestic property and other		$ 48	$ 46	$ 40
Total		48	46	40
Deferred Tax Assets, Valuation Allowances		9	11
Kentucky Utilities Co [Member]
Income Tax Expense (Benefit)
Current - Federal		63	58	40
Current - State		11	8	3
Total Current Expense		74	66	43
Deferred - Federal		(3)	(4)	11
Deferred - State		7	7	11
Total Deferred Expense (Benefit), excluding operating loss carry forwards		4	3	22
Amortization of investment tax credit		(2)	(2)	(2)
Tax expense (benefit) of operating loss carryforwards [Abstract]
Total income tax from continuing operations		76	67	63
Income tax expense [Abstract]
Total income tax expense - Federal		58	52	49
Total income tax expense - State		18	15	14
Total income tax from continuing operations		76	67	63
Reconciliation of Income Tax Expense
Federal income tax on Income Before Income Taxes at statutory tax rate		84	76	72
Increase (decrease) due to:
State income taxes, net of federal income tax benefit		16	14	14
Amortization of investment tax credit		(2)	(2)	(2)
Amortization of excess deferred federal and state income taxes		(21)	(20)	(17)
Other		(1)	(1)	(4)
Total increase (decrease)		(8)	(9)	(9)
Total income tax from continuing operations		$ 76	$ 67	$ 63
Effective income tax rate		19.10%	18.40%	18.40%
Taxes, other than income
Domestic property and other		$ 45	$ 41	$ 37
Total		45	41	$ 37
Deferred Tax Assets, Valuation Allowances		$ 3	$ 3