Face (par) amount of debt instrument at time of issuance.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

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Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- References

No definition available.

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

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Balance Type:	credit
Period Type:	instant

- Definition

The effective interest rate at the end of the reporting period.

+ References

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

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Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from amounts received from a long-term debt instrument secured by a first mortgage deed of trust, containing a pledge of real property. The lender has the highest claim on the property in case of default.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3255-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The cash inflow from amounts received from issuance of long-term debt that is wholly or partially secured by collateral. Excludes proceeds from tax exempt secured debt.

+ References

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Financing Activities - Long-term Debt (Details) £ in Millions, $ in Millions			1 Months Ended
	Oct. 01, 2020 GBP (£)	Oct. 01, 2020 USD ($)	Jun. 30, 2020 USD ($)	Apr. 30, 2020 USD ($)	Oct. 01, 2020 USD ($)	Sep. 30, 2020 USD ($)	Sep. 01, 2020 USD ($)	Aug. 01, 2020 USD ($)	Jun. 01, 2020 USD ($)	Apr. 01, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
PPL Electric [Member] \| Pollution Control Revenue Refunding Bonds [Member] \| Remarketed [Member] \| Subsequent Event [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount					$ 90
Stated interest rate	0.40%				0.40%
PPL Electric [Member] \| First Mortgage Bond [Member] \| First Mortgage Bonds, Floating Rate Series due 2023 [Member] \| Subsequent Event [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount					$ 250
Proceeds from Issuance of Debt		$ 249
PPL Capital Funding [Member]
Long-term Debt (Numeric) [Abstract]
Capacity						$ 1,950
Borrowed						400						$ 0
PPL Capital Funding [Member] \| Term Loan Facility [Member]
Long-term Debt (Numeric) [Abstract]
Capacity						200				$ 100	$ 200
Borrowed						200				$ 100	$ 200	0
Interest rate on outstanding borrowing										1.73%	1.96%
PPL Capital Funding [Member] \| Senior Notes [Member] \| Senior Notes Due 2030 [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount										$ 1,000
Stated interest rate										4.125%
Proceeds from Issuance of Secured Debt				$ 993
PPL Capital Funding [Member] \| Term Loan Facility [Member] \| Term Loan Due 2022 [Member]
Long-term Debt (Numeric) [Abstract]
Capacity										$ 100
Borrowed										$ 100
Interest rate on outstanding borrowing										1.72%
LKE [Member] \| Senior Notes [Member] \| Senior Notes Due 2020 [Member] \| Redemption [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount									$ 475
Stated interest rate									3.75%
LGE [Member]
Long-term Debt (Numeric) [Abstract]
Capacity						500
Borrowed						0						0
KU [Member]
Long-term Debt (Numeric) [Abstract]
Capacity						400
Borrowed						0						0
KU [Member] \| First Mortgage Bond [Member] \| First Mortgage Bonds due 2050 [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount									$ 500
Stated interest rate									3.30%
Proceeds from Issuance of First Mortgage Bond			$ 493
KU [Member] \| First Mortgage Bond [Member] \| First Mortgage Bonds due 2020 [Member] \| Redemption [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount								$ 500
Stated interest rate								3.25%
Louisville Gas And Electric Co [Member] \| Pollution Control Revenue Refunding Bonds, 2016 Series [Member] \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount							$ 125
Stated interest rate							1.30%
Louisville Gas And Electric Co [Member] \| Pollution Control Revenue Refunding Bonds, 2001 Series [Member] \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount							$ 23
Stated interest rate							0.90%
WPD South Wales [Member] \| Senior Notes [Member] \| Senior Notes Due 2020 [Member] \| Subsequent Event [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount \| £	£ 150
Stated interest rate	9.25%				9.25%
WPD South Wales [Member] \| Senior Notes [Member] \| Senior Notes Due 2035 [Member] \| Subsequent Event [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount \| £	£ 250
Stated interest rate	1.625%				1.625%
Proceeds from Issuance of Secured Debt	£ 247	319
PPL Electric Utilities Corp [Member] \| Pollution Control Revenue Refunding Bonds [Member] \| Remarketed [Member] \| Subsequent Event [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount					$ 90
Stated interest rate	0.40%				0.40%
PPL Electric Utilities Corp [Member] \| First Mortgage Bond [Member] \| First Mortgage Bonds, Floating Rate Series due 2023 [Member] \| Subsequent Event [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount					$ 250
Proceeds from Issuance of Debt		$ 249
LG And E And KU Energy LLC [Member] \| Senior Notes [Member] \| Senior Notes Due 2020 [Member] \| Redemption [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount									$ 475
Stated interest rate									3.75%
LG And E And KU Energy LLC [Member] \| LGE [Member]
Long-term Debt (Numeric) [Abstract]
Capacity						500
Borrowed						0						0
LG And E And KU Energy LLC [Member] \| KU [Member]
Long-term Debt (Numeric) [Abstract]
Capacity						400
Borrowed						0						0
LG And E And KU Energy LLC [Member] \| KU [Member] \| First Mortgage Bond [Member] \| First Mortgage Bonds due 2050 [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount									$ 500
Stated interest rate									3.30%
Proceeds from Issuance of First Mortgage Bond			493
LG And E And KU Energy LLC [Member] \| KU [Member] \| First Mortgage Bond [Member] \| First Mortgage Bonds due 2020 [Member] \| Redemption [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount								$ 500
Stated interest rate								3.25%
LG And E And KU Energy LLC [Member] \| Louisville Gas And Electric Co [Member] \| Pollution Control Revenue Refunding Bonds, 2016 Series [Member] \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount							$ 125
Stated interest rate							1.30%
LG And E And KU Energy LLC [Member] \| Louisville Gas And Electric Co [Member] \| Pollution Control Revenue Refunding Bonds, 2001 Series [Member] \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount							$ 23
Stated interest rate							0.90%
Louisville Gas And Electric Co [Member]
Long-term Debt (Numeric) [Abstract]
Capacity						500
Borrowed						0						0
Louisville Gas And Electric Co [Member] \| Pollution Control Revenue Refunding Bonds, 2016 Series [Member] \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount							$ 125
Stated interest rate							1.30%
Louisville Gas And Electric Co [Member] \| Pollution Control Revenue Refunding Bonds, 2001 Series [Member] \| Remarketed [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount							$ 23
Stated interest rate							0.90%
Kentucky Utilities Co [Member]
Long-term Debt (Numeric) [Abstract]
Capacity						400
Borrowed						$ 0						$ 0
Kentucky Utilities Co [Member] \| First Mortgage Bond [Member] \| First Mortgage Bonds due 2050 [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount									$ 500
Stated interest rate									3.30%
Proceeds from Issuance of First Mortgage Bond			$ 493
Kentucky Utilities Co [Member] \| First Mortgage Bond [Member] \| First Mortgage Bonds due 2020 [Member] \| Redemption [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount								$ 500
Stated interest rate								3.25%