Financing Activities - Long-term Debt (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 16, 2022	Aug. 31, 2022	Jul. 29, 2022	Dec. 31, 2021
Long-term Debt (Numeric) [Abstract]
Loss on extinguishment of debt	$ 0	$ (395,000)
Long-term debt due within one year	264,000					$ 474,000
Long-term Debt, Excluding Current Maturities	12,977,000					10,666,000
PPL Electric [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	900,000
Borrowed	250,000					0
PPL Electric [Member] | Term Loan Facility [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	250,000		$ 250,000
Borrowed	250,000		$ 250,000			0
Interest rate on outstanding borrowing			3.77%
PPL Electric [Member] | LCIDA Pollution Control Revenue Refunding Bonds 2016 Series A | Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount	$ 116,000
Stated interest rate	3.00%
PPL Electric [Member] | LCIDA Pollution Control Revenue Refunding Bonds 2016 Series B | Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount				$ 108,000
Stated interest rate				2.63%
PPL Capital Funding [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	$ 1,450,000
Borrowed	0					0
LGE [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	800,000
Borrowed	300,000					0
LGE [Member] | Term Loan Facility [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	300,000				$ 300,000
Borrowed	300,000				$ 300,000	0
Interest rate on outstanding borrowing					3.23%
KU [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	700,000
Borrowed	300,000					0
KU [Member] | Term Loan Facility [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	300,000				$ 300,000
Borrowed	300,000				$ 300,000	0
Interest rate on outstanding borrowing					3.23%
Rhode Island Energy
Long-term Debt (Numeric) [Abstract]
Long-term Debt, Gross	1,503,000
Debt Issuance Costs, Gross	(6,000)
Long-term Debt	1,497,000
Long-term debt due within one year	1,000
Long-term Debt, Excluding Current Maturities	1,496,000
Schedule of Maturities of Long-term Debt	1,000
Long-Term Debt, Maturity, Year Two	1,000
Long-Term Debt, Maturity, Year Three	1,000
Long-Term Debt, Maturity, Year Four	1,000
Long-Term Debt, Maturity, Year Five	0
Long-Term Debt, Maturity, after Year Five	1,499,000
Rhode Island Energy | Unsecured Debt
Long-term Debt (Numeric) [Abstract]
Long-term Debt, Gross	$ 1,500,000
Debt, Weighted Average Interest Rate	4.10%
Rhode Island Energy | Senior Secured Notes First Mortgage Bonds
Long-term Debt (Numeric) [Abstract]
Long-term Debt, Gross	$ 3,000
Annual Sinking Fund Payment Requirement	$ 750
Debt, Weighted Average Interest Rate	7.50%
PPL Electric Utilities Corp [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	$ 900,000
Borrowed	250,000					0
Long-term debt due within one year	250,000					474,000
Long-term Debt, Excluding Current Maturities	4,235,000					4,010,000
PPL Electric Utilities Corp [Member] | Term Loan Facility [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	250,000		$ 250,000
Borrowed	250,000		$ 250,000			0
Interest rate on outstanding borrowing			3.77%
PPL Electric Utilities Corp [Member] | LCIDA Pollution Control Revenue Refunding Bonds 2016 Series A | Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount	$ 116,000
Stated interest rate	3.00%
PPL Electric Utilities Corp [Member] | LCIDA Pollution Control Revenue Refunding Bonds 2016 Series B | Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount				$ 108,000
Stated interest rate				2.63%
Louisville Gas And Electric Co [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	$ 800,000
Borrowed	300,000					0
Long-term Debt, Excluding Current Maturities	2,307,000					2,006,000
Louisville Gas And Electric Co [Member] | Term Loan Facility [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	300,000				$ 300,000
Borrowed	300,000				$ 300,000	0
Interest rate on outstanding borrowing					3.23%
Kentucky Utilities Co [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	700,000
Borrowed	300,000					0
Long-term debt due within one year	13,000					0
Long-term Debt, Excluding Current Maturities	2,906,000					2,618,000
Kentucky Utilities Co [Member] | Term Loan Facility [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	300,000				$ 300,000
Borrowed	$ 300,000				$ 300,000	$ 0
Interest rate on outstanding borrowing					3.23%