Fair Value Measurements (Assets and Liabilities Measured on Recurring Basis Table) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Level 3 [Member] | Rhode Island Regulated
Price risk management liabilities:
Gas contracts, Liability	$ 56	$ 0
Gas Contracts Included in Regulatory Assets	56
Recurring [Member]
Price risk management liabilities:
Cash and cash equivalents	356	3,571
Restricted cash and cash equivalents	1	1
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	357	3,572
Money market fund	1	2
Commingled debt fund measured at NAV	13	22
Commingled equity fund measured at NAV	11	21
Total special use funds	25	45
Gas Purchase Contract, Fair Value Disclosure	25	0
Total Assets	407	3,617
Interest rate swaps	7	18
Gas contracts, Liability	66	0
Liability value	73	18
Recurring [Member] | PPL Electric Utilities Corp [Member]
Price risk management liabilities:
Cash and cash equivalents	25	21
Total Assets	25	21
Recurring [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]
Price risk management liabilities:
Cash and cash equivalents	93	9
Total Assets	93	9
Interest rate swaps	7	18
Liability value	7	18
Recurring [Member] | Kentucky Utilities Co [Member]
Price risk management liabilities:
Cash and cash equivalents	21	13
Total Assets	21	13
Recurring [Member] | Level 1 [Member]
Price risk management liabilities:
Cash and cash equivalents	356	3,571
Restricted cash and cash equivalents	1	1
Total Cash, Cash Equivalents and Restricted Cash, Fair Value	357	3,572
Money market fund	1	2
Total special use funds	1	2
Gas Purchase Contract, Fair Value Disclosure	0	0
Total Assets	358	3,574
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	25	21
Total Assets	25	21
Recurring [Member] | Level 1 [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]
Price risk management liabilities:
Cash and cash equivalents	93	9
Total Assets	93	9
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	21	13
Total Assets	21	13
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	25	0
Total Assets	25	0
Interest rate swaps	7	18
Gas contracts, Liability	10	0
Liability value	17	18
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
Total Assets	0	0
Interest rate swaps	7	18
Liability value	7	18
Recurring [Member] | Level 2 [Member] | Kentucky Utilities Co [Member]
Price risk management liabilities:
Cash and cash equivalents	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	56	0
Liability value	56	0
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
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
Total Assets	0	0
Carrying Amount [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	13,243	11,140
Carrying Amount [Member] | PPL Electric Utilities Corp [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	4,486	4,484
Carrying Amount [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	2,307	2,006
Carrying Amount [Member] | Kentucky Utilities Co [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	2,920	2,618
Fair Value [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	12,239	12,955
Fair Value [Member] | PPL Electric Utilities Corp [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	4,259	5,272
Fair Value [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	2,128	2,363
Fair Value [Member] | Kentucky Utilities Co [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Long-term debt	$ 2,616	$ 3,120