Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Utility Revenue (Details) [Abstract]
Operating Revenues	$ 7,902	$ 5,783	$ 5,474
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	356	3,571
Total Cash, Cash Equivalents and Restricted Cash	357	3,572	443	$ 660
Property, Plant and Equipment (Numeric) [Abstract]
Interest costs, capitalized during the period	$ 7	6	$ 7
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	$ 443	322
Balance Sheet Classification of Deferred Taxes [Abstract]
Goodwill	2,248	716
Fuel [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	125	90
Natural Gas Stored Underground [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	91	54
Material And Supplies [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	$ 227	$ 178
Regulated Operations [Member] | Utility Plant [Member]
Depreciation (Details) [Abstract]
Weighted-average rates	3.21%	3.61%	3.53%
Allowance For Doubtful Accounts [Member]
Allowance for Doubtful Accounts (Details) [Roll Forward]
Balance at beginning of period	$ 69	$ 73	$ 58
Additions charged to income	78	26	28
Deductions	52	30	13
Balance at end of period	95	69	73
PPL Electric Utilities Corp [Member]
Utility Revenue (Details) [Abstract]
Operating Revenues	3,030	2,402	2,331
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	25	21
Total Cash, Cash Equivalents and Restricted Cash	25	21	40	264
Property, Plant and Equipment (Numeric) [Abstract]
Interest costs, capitalized during the period	5	6	$ 7
Income Taxes [Abstract]
Intercompany tax receivables (payables)	2	(4)
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	69	61
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	$ 69	$ 61
PPL Electric Utilities Corp [Member] | Regulated Operations [Member] | Utility Plant [Member]
Depreciation (Details) [Abstract]
Weighted-average rates	2.75%	3.05%	2.99%
PPL Electric Utilities Corp [Member] | Allowance For Doubtful Accounts [Member]
Allowance for Doubtful Accounts (Details) [Roll Forward]
Balance at beginning of period	$ 35	$ 41	$ 30
Additions charged to income	27	13	19
Deductions	29	19	8
Balance at end of period	33	35	41
Louisville Gas And Electric Co [Member]
Utility Revenue (Details) [Abstract]
Operating Revenues	1,798	1,569	1,456
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	93	9	$ 7	15
Income Taxes [Abstract]
Intercompany tax receivables (payables)	(6)	4
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	166	137
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	44	32
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	68	54
Louisville Gas And Electric Co [Member] | Material And Supplies [Member]
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	$ 54	$ 51
Louisville Gas And Electric Co [Member] | Regulated Operations [Member] | Utility Plant [Member]
Depreciation (Details) [Abstract]
Weighted-average rates	4.16%	3.99%	4.00%
Louisville Gas And Electric Co [Member] | Allowance For Doubtful Accounts [Member]
Allowance for Doubtful Accounts (Details) [Roll Forward]
Balance at beginning of period	$ 3	$ 3	$ 1
Additions charged to income	6	4	4
Deductions	5	4	2
Balance at end of period	4	3	3
Kentucky Utilities Co [Member]
Utility Revenue (Details) [Abstract]
Operating Revenues	2,074	1,826	1,690
Restricted Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	21	13	$ 22	$ 12
Income Taxes [Abstract]
Intercompany tax receivables (payables)	4	1
Fuel, Materials and Supplies (Details) [Abstract]
Fuel, materials and supplies on the Balance Sheet	167	124
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	81	58
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	$ 86	$ 66
Kentucky Utilities Co [Member] | Regulated Operations [Member] | Utility Plant [Member]
Depreciation (Details) [Abstract]
Weighted-average rates	4.01%	4.17%	4.00%
Kentucky Utilities Co [Member] | Allowance For Doubtful Accounts [Member]
Allowance for Doubtful Accounts (Details) [Roll Forward]
Balance at beginning of period	$ 3	$ 2	$ 1
Additions charged to income	6	8	4
Deductions	6	7	3
Balance at end of period	$ 3	$ 3	$ 2