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Fair Value Measurements (Assets and Liabilities Measured on Recurring Basis Table) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Recurring [Member]    
Price risk management liabilities:    
Cash and cash equivalents $ 1,071 $ 306
Restricted cash and cash equivalents 15 33
Total Cash, Cash Equivalents and Restricted Cash, Fair Value 1,086 339
Money market fund 1 1
Commingled debt fund measured at NAV 5 10
Commingled equity fund measured at NAV 5 8
Total special use funds 11 19
Gas Purchase Contract, Fair Value Disclosure 6 9
Total Assets 1,103 367
Interest rate swaps 5 3
Gas contracts, Liability 10 13
Liability value 15 16
Recurring [Member] | PPL Electric Utilities Corp [Member]    
Price risk management liabilities:    
Cash and cash equivalents 30 24
Total Assets 30 24
Recurring [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]    
Price risk management liabilities:    
Cash and cash equivalents 162 8
Restricted cash and cash equivalents 7 16
Total Cash, Cash Equivalents and Restricted Cash, Fair Value 169 24
Total Assets 169 24
Interest rate swaps 5 3
Liability value 5 3
Recurring [Member] | Kentucky Utilities Co [Member]    
Price risk management liabilities:    
Cash and cash equivalents 10 13
Restricted cash and cash equivalents 7 16
Total Cash, Cash Equivalents and Restricted Cash, Fair Value 17 29
Total Assets 17 29
Recurring [Member] | Level 1 [Member]    
Price risk management liabilities:    
Cash and cash equivalents 1,071 306
Restricted cash and cash equivalents 15 33
Total Cash, Cash Equivalents and Restricted Cash, Fair Value 1,086 339
Money market fund 1 1
Total special use funds 1 1
Gas Purchase Contract, Fair Value Disclosure 0 0
Total Assets 1,087 340
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 30 24
Total Assets 30 24
Recurring [Member] | Level 1 [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]    
Price risk management liabilities:    
Cash and cash equivalents 162 8
Restricted cash and cash equivalents 7 16
Total Cash, Cash Equivalents and Restricted Cash, Fair Value 169 24
Total Assets 169 24
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 10 13
Restricted cash and cash equivalents 7 16
Total Cash, Cash Equivalents and Restricted Cash, Fair Value 17 29
Total Assets 17 29
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 2 4
Total Assets 2 4
Interest rate swaps 5 3
Gas contracts, Liability 6 10
Liability value 11 13
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 5 3
Liability value 5 3
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 4 5
Total Assets 4 5
Interest rate swaps 0 0
Gas contracts, Liability 4 3
Liability value 4 3
Recurring [Member] | Level 3 [Member] | Gas Contracts    
Price risk management liabilities:    
Gas Contracts, Liability, Purchases (2)  
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs 0 2
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 18,894 16,503
Carrying Amount [Member] | PPL Electric Utilities Corp [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Long-term debt 5,707 5,214
Carrying Amount [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Long-term debt 2,865 2,471
Carrying Amount [Member] | Kentucky Utilities Co [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Long-term debt 3,510 3,066
Fair Value [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Long-term debt 18,488 15,562
Fair Value [Member] | PPL Electric Utilities Corp [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Long-term debt 5,473 4,862
Fair Value [Member] | LOUISVILLE GAS And ELECTRIC CO [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Long-term debt 2,784 2,295
Fair Value [Member] | Kentucky Utilities Co [Member]    
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]    
Long-term debt $ 3,304 $ 2,750