Fair Value Measurements (Assets and Liabilities Measured on Recurring Basis Table) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Recurring [Member]
Price risk management liabilities:
Cash and cash equivalents	$ 331	$ 356
Restricted cash and cash equivalents	51	1
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	382	357
Money market fund	1	1
Commingled debt fund measured at NAV	9	13
Commingled equity fund measured at NAV	8	11
Total special use funds	18	25
Gas Purchase Contract, Fair Value Disclosure	1	25
Total Assets	401	407
Interest rate swaps	7	7
Gas contracts, Liability	60	66
Liability value	67	73
Recurring [Member] | PPL Electric Utilities Corp [Member]
Price risk management liabilities:
Cash and cash equivalents	51	25
Total Assets	51	25
Recurring [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]
Price risk management liabilities:
Cash and cash equivalents	18	93
Restricted cash and cash equivalents	26	0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	44	93
Total Assets	44	93
Interest rate swaps	7	7
Liability value	7	7
Recurring [Member] | Kentucky Utilities Co [Member]
Price risk management liabilities:
Cash and cash equivalents	14	21
Restricted cash and cash equivalents	24	0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	38	21
Total Assets	38	21
Recurring [Member] | Level 1 [Member]
Price risk management liabilities:
Cash and cash equivalents	331	356
Restricted cash and cash equivalents	51	1
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	382	357
Money market fund	1	1
Total special use funds	1	1
Gas Purchase Contract, Fair Value Disclosure	0	0
Total Assets	383	358
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	51	25
Total Assets	51	25
Recurring [Member] | Level 1 [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]
Price risk management liabilities:
Cash and cash equivalents	18	93
Restricted cash and cash equivalents	26	0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	44	93
Total Assets	44	93
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	14	21
Restricted cash and cash equivalents	24	0
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	38	21
Total Assets	38	21
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	1	25
Total Assets	1	25
Interest rate swaps	7	7
Gas contracts, Liability	41	10
Liability value	48	17
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	7	7
Liability value	7	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	0	0
Total Assets	0	0
Interest rate swaps	0	0
Gas contracts, Liability	19	56
Gas Contracts, Liability, Purchases	19
Liability value	19	56
Gas Contracts, Liability, Settlements	(56)
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	14,612	13,243
Carrying Amount [Member] | PPL Electric Utilities Corp [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	4,567	4,486
Carrying Amount [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	2,469	2,307
Carrying Amount [Member] | Kentucky Utilities Co [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	3,064	2,920
Fair Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	14,031	12,239
Fair Value [Member] | PPL Electric Utilities Corp [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	4,475	4,259
Fair Value [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	2,369	2,128
Fair Value [Member] | Kentucky Utilities Co [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	$ 2,861	$ 2,616