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
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

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

- Definition

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

+ References

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Balance Type:	na
Period Type:	instant

- References

No definition available.

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Period Type:	duration

- 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
-SubTopic 210
-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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Namespace Prefix:	us-gaap_
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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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Namespace Prefix:	us-gaap_
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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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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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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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Balance Type:	debit
Period Type:	duration

Financing Activities - Long-term Debt (Details) - USD ($) $ in Millions	1 Months Ended
	Jun. 30, 2020	Apr. 30, 2020	Aug. 01, 2020	Jun. 01, 2020	Apr. 01, 2020	Mar. 31, 2020	Dec. 31, 2019
PPL Capital Funding [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	$ 1,950
Borrowed	$ 400						$ 0
Interest rate on outstanding borrowing	1.04%
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] \| Intent to Redeem [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] \| Subsequent Event [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount			$ 500
Stated interest rate			3.25%
LG And E And KU Energy LLC [Member] \| Senior Notes [Member] \| Senior Notes Due 2020 [Member] \| Intent to Redeem [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] \| Subsequent Event [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount			$ 500
Stated interest rate			3.25%
Louisville Gas And Electric Co [Member]
Long-term Debt (Numeric) [Abstract]
Capacity	500
Borrowed	0						0
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] \| Subsequent Event [Member]
Long-term Debt (Numeric) [Abstract]
Principal amount			$ 500
Stated interest rate			3.25%