Fair Value Measurements (Assets and Liabilities Measured on Recurring Basis Table) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Recurring [Member]
Price risk management liabilities:
Cash and cash equivalents	$ 306	$ 331
Restricted cash and cash equivalents	33	51
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	339	382
Money market fund	1	1
Commingled debt fund measured at NAV	10	9
Commingled equity fund measured at NAV	8	8
Total special use funds	19	18
Gas Purchase Contract, Fair Value Disclosure	9	1
Total Assets	367	401
Interest rate swaps	3	7
Gas contracts, Liability	13	60
Liability value	16	67
Recurring [Member] | PPL Electric Utilities Corp [Member]
Price risk management liabilities:
Cash and cash equivalents	24	51
Total Assets	24	51
Recurring [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]
Price risk management liabilities:
Cash and cash equivalents	8	18
Restricted cash and cash equivalents	16	26
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	24	44
Total Assets	24	44
Interest rate swaps	3	7
Liability value	3	7
Recurring [Member] | Kentucky Utilities Co [Member]
Price risk management liabilities:
Cash and cash equivalents	13	14
Restricted cash and cash equivalents	16	24
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	29	38
Total Assets	29	38
Recurring [Member] | Level 1 [Member]
Price risk management liabilities:
Cash and cash equivalents	306	331
Restricted cash and cash equivalents	33	51
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	339	382
Money market fund	1	1
Total special use funds	1	1
Gas Purchase Contract, Fair Value Disclosure	0	0
Total Assets	340	383
Interest rate swaps	0	0
Gas contracts, Liability	0	0
Liability value	0	0
Recurring [Member] | Level 1 [Member] | PPL Electric Utilities Corp [Member]
Price risk management liabilities:
Cash and cash equivalents	24	51
Total Assets	24	51
Recurring [Member] | Level 1 [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]
Price risk management liabilities:
Cash and cash equivalents	8	18
Restricted cash and cash equivalents	16	26
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	24	44
Total Assets	24	44
Interest rate swaps	0	0
Liability value	0	0
Recurring [Member] | Level 1 [Member] | Kentucky Utilities Co [Member]
Price risk management liabilities:
Cash and cash equivalents	13	14
Restricted cash and cash equivalents	16	24
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	29	38
Total Assets	29	38
Recurring [Member] | Level 2 [Member]
Price risk management liabilities:
Cash and cash equivalents	0	0
Restricted cash and cash equivalents	0	0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	0	0
Money market fund	0	0
Total special use funds	0	0
Gas Purchase Contract, Fair Value Disclosure	4	1
Total Assets	4	1
Interest rate swaps	3	7
Gas contracts, Liability	10	41
Liability value	13	48
Recurring [Member] | Level 2 [Member] | PPL Electric Utilities Corp [Member]
Price risk management liabilities:
Cash and cash equivalents	0	0
Total Assets	0	0
Recurring [Member] | Level 2 [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]
Price risk management liabilities:
Cash and cash equivalents	0	0
Restricted cash and cash equivalents	0	0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	0	0
Total Assets	0	0
Interest rate swaps	3	7
Liability value	3	7
Recurring [Member] | Level 2 [Member] | Kentucky Utilities Co [Member]
Price risk management liabilities:
Cash and cash equivalents	0	0
Restricted cash and cash equivalents	0	0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	0	0
Total Assets	0	0
Recurring [Member] | Level 3 [Member]
Price risk management liabilities:
Cash and cash equivalents	0	0
Restricted cash and cash equivalents	0	0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	0	0
Money market fund	0	0
Total special use funds	0	0
Gas Purchase Contract, Fair Value Disclosure	5	0
Total Assets	5	0
Interest rate swaps	0	0
Gas contracts, Liability	3	19
Liability value	3	19
Recurring [Member] | Level 3 [Member] | Gas Contracts
Price risk management liabilities:
Gas Contracts, Liability, Purchases	2
Gas Contracts, Liability, Settlements	19
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	2	(19)
Recurring [Member] | Level 3 [Member] | PPL Electric Utilities Corp [Member]
Price risk management liabilities:
Cash and cash equivalents	0	0
Total Assets	0	0
Recurring [Member] | Level 3 [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]
Price risk management liabilities:
Cash and cash equivalents	0	0
Restricted cash and cash equivalents	0	0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	0	0
Total Assets	0	0
Interest rate swaps	0	0
Liability value	0	0
Recurring [Member] | Level 3 [Member] | Kentucky Utilities Co [Member]
Price risk management liabilities:
Cash and cash equivalents	0	0
Restricted cash and cash equivalents	0	0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	0	0
Total Assets	0	0
Carrying Amount [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	16,503	14,612
Carrying Amount [Member] | PPL Electric Utilities Corp [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	5,214	4,567
Carrying Amount [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	2,471	2,469
Carrying Amount [Member] | Kentucky Utilities Co [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	3,066	3,064
Fair Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	15,562	14,031
Fair Value [Member] | PPL Electric Utilities Corp [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	4,862	4,475
Fair Value [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	2,295	2,369
Fair Value [Member] | Kentucky Utilities Co [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	$ 2,750	$ 2,861