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Financing Activities - Long-term Debt (Details) - USD ($) $ in Millions	1 Months Ended		12 Months Ended
	Jul. 31, 2021	Jun. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2021	Jul. 01, 2021	Jun. 24, 2021	May 31, 2021	Apr. 30, 2021	Apr. 01, 2021
Debt Instrument [Line Items]
Principal outstanding			$ 11,251	$ 14,835
Unamortized premium and (discount), net			(34)	(40)
Unamortized debt issuance costs			(77)	(106)
Total Long-term Debt			11,140	14,689
Less current portion of Long-term debt			474	1,074
Long-term Debt			10,666	13,615
Aggregate maturities of long-term debt (Details) [Abstract]
2022			474
2023			353
2024			650
2025			550
2026			904
Thereafter			8,320
Loss on Extinguishment of Debt			$ (395)	0	$ 0
Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Weighted-Average Rate			3.81%
Principal outstanding			$ 1,566	4,850
Senior Secured Notes - First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Weighted-Average Rate			3.59%
Principal outstanding			$ 9,205	8,955
Junior Subordinated Notes [Member]
Debt Instrument [Line Items]
Weighted-Average Rate			2.89%
Principal outstanding			$ 480	930
Term Loan Credit Facility [Member]
Debt Instrument [Line Items]
Principal outstanding			0	100
First Mortgage Bonds [Member] \| Tax Exempt Revenue Bonds [Member]
Long-term Debt (Numeric) [Abstract]
Aggregate amount of tax-exempt revenue bonds in a term rate mode			782
Senior Notes [Member] \| Senior Notes Due 2021 [Member] \| Debt Instrument, Redemption, Period One [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount	$ 250
Stated interest rate	4.375%
PPL Capital Funding [Member]
Aggregate maturities of long-term debt (Details) [Abstract]
Capacity			1,350
PPL Capital Funding [Member] \| Term Loan Credit Facility [Member]
Aggregate maturities of long-term debt (Details) [Abstract]
Capacity			0
PPL Capital Funding [Member] \| Repayment \| Term Loan Credit Facility [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount											$ 100
PPL Capital Funding [Member] \| Repayment \| Senior Notes due 2022 (4.20%)
Long-term Debt (Numeric) [Abstract]
Stated interest rate	4.20%	4.20%
PPL Capital Funding [Member] \| Repayment \| Senior Notes due 2022 (3.50%)
Long-term Debt (Numeric) [Abstract]
Stated interest rate	3.50%	3.50%
PPL Capital Funding [Member] \| Repayment \| Senior Notes due 2023
Long-term Debt (Numeric) [Abstract]
Stated interest rate	3.40%	3.40%
PPL Capital Funding [Member] \| Repayment \| Senior Notes due 2024
Long-term Debt (Numeric) [Abstract]
Stated interest rate	3.95%	3.95%
PPL Capital Funding [Member] \| Repayment \| Senior Notes due 2043
Long-term Debt (Numeric) [Abstract]
Stated interest rate		4.70%
PPL Capital Funding [Member] \| Repayment \| Senior Notes due 2044
Long-term Debt (Numeric) [Abstract]
Stated interest rate		5.00%
PPL Capital Funding [Member] \| Repayment \| Senior Notes due 2047
Long-term Debt (Numeric) [Abstract]
Stated interest rate		4.00%
PPL Capital Funding [Member] \| Repayment \| Senior Notes Due 2030 [Member]
Long-term Debt (Numeric) [Abstract]
Stated interest rate		4.125%
PPL Capital Funding [Member] \| Repayment \| Senior Notes due 2026
Long-term Debt (Numeric) [Abstract]
Stated interest rate		3.10%
PPL Capital Funding [Member] \| Repayment \| Senior Notes [Member]
Aggregate maturities of long-term debt (Details) [Abstract]
Extinguishment of Debt, Aggregate Purchase Price	$ 1,133	$ 1,000
Extinguishment of Debt, Amount	1,072	1,962
Loss on Extinguishment of Debt	(58)	(322)
PPL Capital Funding [Member] \| Repayment \| Senior Notes 2
Aggregate maturities of long-term debt (Details) [Abstract]
Extinguishment of Debt, Aggregate Purchase Price		$ 2,293
PPL Capital Funding [Member] \| Repayment \| Junior Subordinated Notes due 2073
Long-term Debt (Numeric) [Abstract]
Principal amount	$ 450
Stated interest rate	5.90%
Aggregate maturities of long-term debt (Details) [Abstract]
Loss on Extinguishment of Debt	$ (15)
PPL Capital Funding [Member] \| Senior Notes [Member] \| Repayment
Aggregate maturities of long-term debt (Details) [Abstract]
Long-term Debt, Weighted Average Interest Rate, at Point in Time	3.71%	4.14%
PPL Electric [Member] \| Senior Secured Notes - First Mortgage Bonds [Member] \| Potential To Be Called Within One Year [Member]
Debt Instrument [Line Items]
Principal outstanding			650
PPL Electric [Member] \| Senior Secured Notes - First Mortgage Bonds [Member] \| Currently Able To Be Called
Debt Instrument [Line Items]
Principal outstanding			250
PPL Electric [Member] \| Senior Secured Notes - First Mortgage Bonds [Member] \| Mortgage Indenture [Member]
Long-term Debt (Numeric) [Abstract]
Aggregate carrying value of property subject to lien			11,300	10,800
PPL Electric [Member] \| Senior Secured Notes - First Mortgage Bonds [Member] \| Pollution Control Revenue Refunding Bonds [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount that may be redeemed at a future date			224
Principal amount that may be redeemed in whole or in part			$ 90
Minimum length of time to convert interest rate mode			1 year
PPL Electric [Member] \| First Mortgage Bonds [Member] \| First Mortgage Bonds, Floating Rate Series due 2024
Long-term Debt (Numeric) [Abstract]
Principal amount								$ 650
Aggregate maturities of long-term debt (Details) [Abstract]
Proceeds from Issuance of Debt		$ 647
PPL Electric [Member] \| First Mortgage Bonds [Member] \| First Mortgage Bonds, 3% Series due 2021 \| Redemption
Long-term Debt (Numeric) [Abstract]
Principal amount							$ 400
Stated interest rate							3.00%
LGE [Member] \| Louisville/Jefferson County Metro Government of Kentucky Pollution Control Revenue Bonds, 2005 Series A [Member] \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount										$ 128
LGE [Member] \| Trimble County Pollution Control Revenue Bonds, 2001 Series B \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount									$ 35
Stated interest rate									1.35%
LGE [Member] \| Louisville/Jefferson County Metro Government Pollution Control Revenue Bonds, 2001 Series B \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount									$ 35
Stated interest rate									1.35%
LGE [Member] \| Louisville/Jefferson County Metro Government of Kentucky Environmental Facilities Revenue Refunding Bonds, 2007 Series B \| Conversion to Weekly Interest Rate
Long-term Debt (Numeric) [Abstract]
Principal amount		31
LGE [Member] \| Louisville/Jefferson County Metro Government of Kentucky Environmental Revenue Refunding Bonds, 2007 Series B \| Conversion to Weekly Interest Rate
Long-term Debt (Numeric) [Abstract]
Principal amount		35
LGE [Member] \| Trimble County Pollution Control Revenue Bonds, 2001 Series A \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount						$ 28
Stated interest rate						0.625%
LGE [Member] \| Louisville/Jefferson County Metro Government of Kentucky Pollution Control Revenue Bonds, 2003 Series A [Member] \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Stated interest rate										2.00%
LGE [Member] \| First Mortgage Bonds [Member] \| 2010 Mortgage Indenture [Member]
Long-term Debt (Numeric) [Abstract]
Aggregate carrying value of property subject to lien			$ 5,700	5,500
LGE [Member] \| First Mortgage Bonds [Member] \| Tax Exempt Revenue Bonds [Member]
Long-term Debt (Numeric) [Abstract]
Minimum length of time to convert interest rate mode			1 year
Aggregate amount of tax-exempt revenue bonds in a variable rate mode			$ 66
LKE [Member] \| Senior Notes [Member] \| Senior Notes Due 2021 [Member] \| Debt Instrument, Redemption, Period One [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount	$ 250
Stated interest rate	4.375%
KU [Member] \| Carroll County of Kentucky Environmental Facilities Revenue Refunding Bonds, 2006 Series B \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount		$ 54
Stated interest rate		2.125%
KU [Member] \| Carroll County of Kentucky Environmental Facilities Revenue Refunding Bonds, \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount		$ 78
Stated interest rate		2.00%
KU [Member] \| First Mortgage Bonds [Member] \| 2010 Mortgage Indenture [Member]
Long-term Debt (Numeric) [Abstract]
Aggregate carrying value of property subject to lien			$ 6,900	6,700
KU [Member] \| First Mortgage Bonds [Member] \| Tax Exempt Revenue Bonds [Member]
Long-term Debt (Numeric) [Abstract]
Minimum length of time to convert interest rate mode			1 year
Aggregate amount of tax-exempt revenue bonds in a variable rate mode			$ 33
PPL Electric Utilities Corp [Member]
Debt Instrument [Line Items]
Principal outstanding			4,539	4,289
Unamortized discount			(22)	(23)
Unamortized debt issuance costs			(33)	(30)
Total Long-term Debt			4,484	4,236
Less current portion of Long-term debt			474	400
Long-term Debt			4,010	3,836
Aggregate maturities of long-term debt (Details) [Abstract]
2022			474
2023			340
2024			650
2025			0
2026			0
Thereafter			$ 3,075
PPL Electric Utilities Corp [Member] \| Senior Secured Notes - First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Weighted-Average Rate			3.37%
Principal outstanding			$ 4,539	4,289
PPL Electric Utilities Corp [Member] \| Senior Secured Notes - First Mortgage Bonds [Member] \| Potential To Be Called Within One Year [Member]
Debt Instrument [Line Items]
Principal outstanding			650
PPL Electric Utilities Corp [Member] \| Senior Secured Notes - First Mortgage Bonds [Member] \| Currently Able To Be Called
Debt Instrument [Line Items]
Principal outstanding			250
PPL Electric Utilities Corp [Member] \| Senior Secured Notes - First Mortgage Bonds [Member] \| Mortgage Indenture [Member]
Long-term Debt (Numeric) [Abstract]
Aggregate carrying value of property subject to lien			11,300	10,800
PPL Electric Utilities Corp [Member] \| Senior Secured Notes - First Mortgage Bonds [Member] \| Pollution Control Revenue Refunding Bonds [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount that may be redeemed at a future date			224
Principal amount that may be redeemed in whole or in part			$ 90
Minimum length of time to convert interest rate mode			1 year
PPL Electric Utilities Corp [Member] \| First Mortgage Bonds [Member] \| First Mortgage Bonds, Floating Rate Series due 2024
Long-term Debt (Numeric) [Abstract]
Principal amount								$ 650
Aggregate maturities of long-term debt (Details) [Abstract]
Proceeds from Issuance of Debt		$ 647
PPL Electric Utilities Corp [Member] \| First Mortgage Bonds [Member] \| First Mortgage Bonds, 3% Series due 2021 \| Redemption
Long-term Debt (Numeric) [Abstract]
Principal amount							$ 400
Stated interest rate							3.00%
Louisville Gas And Electric Co [Member]
Debt Instrument [Line Items]
Principal outstanding			$ 2,024	2,024
Unamortized discount			(4)	(4)
Unamortized debt issuance costs			(14)	(13)
Total Long-term Debt			2,006	2,007
Less current portion of Long-term debt			0	292
Long-term Debt			2,006	1,715
Aggregate maturities of long-term debt (Details) [Abstract]
2022			0
2023			0
2024			0
2025			300
2026			90
Thereafter			$ 1,634
Louisville Gas And Electric Co [Member] \| Louisville/Jefferson County Metro Government of Kentucky Pollution Control Revenue Bonds, 2005 Series A [Member] \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount										$ 128
Louisville Gas And Electric Co [Member] \| Trimble County Pollution Control Revenue Bonds, 2001 Series B \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount									$ 35
Stated interest rate									1.35%
Louisville Gas And Electric Co [Member] \| Louisville/Jefferson County Metro Government Pollution Control Revenue Bonds, 2001 Series B \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount									$ 35
Stated interest rate									1.35%
Louisville Gas And Electric Co [Member] \| Louisville/Jefferson County Metro Government of Kentucky Environmental Facilities Revenue Refunding Bonds, 2007 Series B \| Conversion to Weekly Interest Rate
Long-term Debt (Numeric) [Abstract]
Principal amount		31
Louisville Gas And Electric Co [Member] \| Louisville/Jefferson County Metro Government of Kentucky Environmental Revenue Refunding Bonds, 2007 Series B \| Conversion to Weekly Interest Rate
Long-term Debt (Numeric) [Abstract]
Principal amount		35
Louisville Gas And Electric Co [Member] \| Trimble County Pollution Control Revenue Bonds, 2001 Series A \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount						$ 28
Stated interest rate						0.625%
Louisville Gas And Electric Co [Member] \| Louisville/Jefferson County Metro Government of Kentucky Pollution Control Revenue Bonds, 2003 Series A [Member] \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Stated interest rate										2.00%
Louisville Gas And Electric Co [Member] \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Weighted-Average Rate			3.59%
Principal outstanding			$ 2,024	2,024
Louisville Gas And Electric Co [Member] \| First Mortgage Bonds [Member] \| 2010 Mortgage Indenture [Member]
Long-term Debt (Numeric) [Abstract]
Aggregate carrying value of property subject to lien			$ 5,700	5,500
Louisville Gas And Electric Co [Member] \| First Mortgage Bonds [Member] \| Tax Exempt Revenue Bonds [Member]
Long-term Debt (Numeric) [Abstract]
Minimum length of time to convert interest rate mode			1 year
Aggregate amount of tax-exempt revenue bonds in a term rate mode			$ 473
Aggregate amount of tax-exempt revenue bonds in a variable rate mode			66
Kentucky Utilities Co [Member]
Debt Instrument [Line Items]
Principal outstanding			2,642	2,642
Debt Instrument, Unamortized Premium			5	5
Unamortized discount			(9)	(9)
Unamortized debt issuance costs			(20)	(20)
Total Long-term Debt			2,618	2,618
Less current portion of Long-term debt			0	132
Long-term Debt			2,618	2,486
Aggregate maturities of long-term debt (Details) [Abstract]
2022			0
2023			13
2024			0
2025			250
2026			164
Thereafter			$ 2,215
Kentucky Utilities Co [Member] \| Carroll County of Kentucky Environmental Facilities Revenue Refunding Bonds, 2006 Series B \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount		$ 54
Stated interest rate		2.125%
Kentucky Utilities Co [Member] \| Carroll County of Kentucky Environmental Facilities Revenue Refunding Bonds, \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount		$ 78
Stated interest rate		2.00%
Kentucky Utilities Co [Member] \| First Mortgage Bonds [Member]
Debt Instrument [Line Items]
Weighted-Average Rate			3.97%
Principal outstanding			$ 2,642	2,642
Kentucky Utilities Co [Member] \| First Mortgage Bonds [Member] \| 2010 Mortgage Indenture [Member]
Long-term Debt (Numeric) [Abstract]
Aggregate carrying value of property subject to lien			$ 6,900	$ 6,700
Kentucky Utilities Co [Member] \| First Mortgage Bonds [Member] \| Tax Exempt Revenue Bonds [Member]
Long-term Debt (Numeric) [Abstract]
Minimum length of time to convert interest rate mode			1 year
Aggregate amount of tax-exempt revenue bonds in a term rate mode			$ 309
Aggregate amount of tax-exempt revenue bonds in a variable rate mode			$ 33