Financing Activities - Long-term Debt (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Long-term Debt (Numeric) [Abstract]
Loss on extinguishment of debt	$ 0	$ (322,000)
Long-term debt due within one year	501,000		$ 474,000
Long-term Debt, Excluding Current Maturities	12,153,000		10,666,000
PPL Capital Funding [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	1,450,000
Borrowed	0		0
Rhode Island Energy
Long-term Debt (Numeric) [Abstract]
Long-term Debt, Gross	1,516,000
Debt Issuance Costs, Gross	(6,000)
Long-term Debt	1,510,000
Long-term debt due within one year	14,000
Long-term Debt, Excluding Current Maturities	1,496,000
Schedule of Maturities of Long-term Debt	14,000
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	$ 16,000
Annual Sinking Fund Payment Requirement	$ 750
Debt, Weighted Average Interest Rate	8.27%
PPL Electric Utilities Corp [Member]
Long-term Debt (Numeric) [Abstract]
Long-term debt due within one year	$ 474,000		474,000
Long-term Debt, Excluding Current Maturities	4,012,000		4,010,000
Louisville Gas And Electric Co [Member]
Long-term Debt (Numeric) [Abstract]
Long-term Debt, Excluding Current Maturities	2,007,000		2,006,000
Kentucky Utilities Co [Member]
Long-term Debt (Numeric) [Abstract]
Long-term debt due within one year	13,000		0
Long-term Debt, Excluding Current Maturities	$ 2,606,000		$ 2,618,000