Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Utility Revenue (Details) [Abstract]
Operating Revenues	$ 8,312	$ 7,902	$ 5,783
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	331	356
Total Cash, Cash Equivalents and Restricted Cash	382	357	3,572	$ 443
Property, Plant and Equipment (Numeric) [Abstract]
Interest costs, capitalized during the period	$ 12	7	$ 6
Discount Rate Change For United Kingdom Pension Plans Numeric [Abstract]
Percentage in excess of gains and losses equal to the plan's projected benefit obligation to use accelerated amortization	30.00%
Minimum percentage of gains and losses under the accelerated method that are amortized on a straight line basis	10.00%
Maximum percentage of gains and losses under the accelerated that are amortized on a straight line basis	30.00%
Income Taxes [Abstract]
Minimum percentage to be attained of likelihood of uncertain tax position being realized	50.00%
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	$ 505	443
Balance Sheet Classification of Deferred Taxes [Abstract]
Goodwill	2,247	2,248
Fuel [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	144	125
Natural Gas Stored Underground [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	58	91
Material And Supplies [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	$ 303	$ 227
Regulated Operations [Member] | Utility Plant [Member]
Depreciation (Details) [Abstract]
Weighted-average rates	3.26%	3.21%	3.61%
Allowance For Doubtful Accounts [Member]
Allowance for Doubtful Accounts (Details) [Roll Forward]
Balance at beginning of period	$ 95	$ 69	$ 73
Additions charged to income	87	78	26
Deductions	52	52	30
Balance at end of period	130	95	69
PPL Electric Utilities Corp [Member]
Utility Revenue (Details) [Abstract]
Operating Revenues	3,008	3,030	2,402
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	51	25
Total Cash, Cash Equivalents and Restricted Cash	51	25	21	40
Property, Plant and Equipment (Numeric) [Abstract]
Interest costs, capitalized during the period	7	5	$ 6
Income Taxes [Abstract]
Intercompany tax receivables (payables)	(21)	2
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	99	69
PPL Electric Utilities Corp [Member] | Fuel [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	0	0
PPL Electric Utilities Corp [Member] | Natural Gas Stored Underground [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	0	0
PPL Electric Utilities Corp [Member] | Material And Supplies [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	$ 99	$ 69
PPL Electric Utilities Corp [Member] | Regulated Operations [Member] | Utility Plant [Member]
Depreciation (Details) [Abstract]
Weighted-average rates	2.62%	2.75%	3.05%
PPL Electric Utilities Corp [Member] | Allowance For Doubtful Accounts [Member]
Allowance for Doubtful Accounts (Details) [Roll Forward]
Balance at beginning of period	$ 33	$ 35	$ 41
Additions charged to income	52	27	13
Deductions	35	29	19
Balance at end of period	50	33	35
Louisville Gas And Electric Co [Member]
Utility Revenue (Details) [Abstract]
Operating Revenues	1,613	1,798	1,569
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	18	93
Total Cash, Cash Equivalents and Restricted Cash	44	93	$ 9	7
Income Taxes [Abstract]
Intercompany tax receivables (payables)	(5)	(6)
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	143	166
Balance Sheet Classification of Deferred Taxes [Abstract]
Goodwill	389	389
Louisville Gas And Electric Co [Member] | Fuel [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	50	44
Louisville Gas And Electric Co [Member] | Natural Gas Stored Underground [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	34	68
Louisville Gas And Electric Co [Member] | Material And Supplies [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	$ 59	$ 54
Louisville Gas And Electric Co [Member] | Regulated Operations [Member] | Utility Plant [Member]
Depreciation (Details) [Abstract]
Weighted-average rates	4.00%	4.16%	3.99%
Louisville Gas And Electric Co [Member] | Allowance For Doubtful Accounts [Member]
Allowance for Doubtful Accounts (Details) [Roll Forward]
Balance at beginning of period	$ 4	$ 3	$ 3
Additions charged to income	4	6	4
Deductions	2	5	4
Balance at end of period	6	4	3
Kentucky Utilities Co [Member]
Utility Revenue (Details) [Abstract]
Operating Revenues	1,884	2,074	1,826
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	14	21
Total Cash, Cash Equivalents and Restricted Cash	38	21	$ 13	$ 22
Income Taxes [Abstract]
Intercompany tax receivables (payables)	(3)	4
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	185	167
Balance Sheet Classification of Deferred Taxes [Abstract]
Goodwill	607	607
Kentucky Utilities Co [Member] | Fuel [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	94	81
Kentucky Utilities Co [Member] | Natural Gas Stored Underground [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	0	0
Kentucky Utilities Co [Member] | Material And Supplies [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	$ 91	$ 86
Kentucky Utilities Co [Member] | Regulated Operations [Member] | Utility Plant [Member]
Depreciation (Details) [Abstract]
Weighted-average rates	3.95%	4.01%	4.17%
Kentucky Utilities Co [Member] | Allowance For Doubtful Accounts [Member]
Allowance for Doubtful Accounts (Details) [Roll Forward]
Balance at beginning of period	$ 3	$ 3	$ 2
Additions charged to income	3	6	8
Deductions	4	6	7
Balance at end of period	2	3	3
Louisville Gas and Electric [Member]
Property, Plant and Equipment (Numeric) [Abstract]
Interest costs, capitalized during the period	1	0	0
Kentucky Utilities [Member]
Property, Plant and Equipment (Numeric) [Abstract]
Interest costs, capitalized during the period	$ 1	$ 0	$ 0