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Other Income (Expense) - net (Tables)
 9 Months Ended
Sep. 30, 2025
Other Income (Expense) Net [Line Items]  
Schedule of Other Nonoperating Income (Expense)
The details of "Other Income (Expense) - net" for the periods ended September 30, were:
 Three MonthsNine Months
2025202420252024
Defined benefit plans - non-service credits (Note 9)
$8 $9 $23 $32 
Interest income6 10 13 25 
AFUDC - equity component23 13 58 33 
Miscellaneous2 — (4)(4)
Other Income (Expense) - net$39 $32 $90 $86 
PPL Electric Utilities Corp [Member]  
Other Income (Expense) Net [Line Items]  
Schedule of Other Nonoperating Income (Expense)
The details of "Other Income (Expense) - net" for the periods ended September 30, were:
 Three MonthsNine Months
2025202420252024
Defined benefit plans - non-service credits (Note 9)
$4 $4 $11 $13 
Interest income3 3 6 5 
AFUDC - equity component8 6 23 17 
Miscellaneous(1)— (4)(2)
Other Income (Expense) - net$14 $13 $36 $33 
Louisville Gas And Electric Co [Member]  
Other Income (Expense) Net [Line Items]  
Schedule of Other Nonoperating Income (Expense)
The details of "Other Income (Expense) - net" for the periods ended September 30, were:
 Three MonthsNine Months
2025202420252024
Defined benefit plans - non-service credits (Note 9)
$— $— $1 $3 
AFUDC - equity component4 2 11 5 
Miscellaneous4 1 4 1 
Other Income (Expense) - net$8 $3 $16 $9 
Kentucky Utilities Co [Member]  
Other Income (Expense) Net [Line Items]  
Schedule of Other Nonoperating Income (Expense)
The details of "Other Income (Expense) - net" for the periods ended September 30, were:
 Three MonthsNine Months
2025202420252024
Defined benefit plans - non-service credits (Note 9)
$1 $2 $4 $6 
AFUDC - equity component6 3 14 6 
Miscellaneous2 (1)1 (2)
Other Income (Expense) - net$9 $4 $19 $10