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Preferred Securities (Details) - $ / shares | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | ---
Preferred Stock [Member] |  |  |
Preferred Securities [Line Items] |  |  |
Shares authorized | 10,000,000 |  |
Preferred Stock, Shares Issued | 0 | 0 | 0
Preferred Stock, Shares Outstanding | 0 | 0 | 0
PPL Electric Utilities Corp [Member] | Preferred Stock [Member] |  |  |
Preferred Securities [Line Items] |  |  |
Shares authorized | 20,629,936 |  |
Preferred Stock, Shares Issued | 0 | 0 | 0
Preferred Stock, Shares Outstanding | 0 | 0 | 0
Louisville Gas And Electric Co [Member] | Preferred Stock [Member] |  |  |
Preferred Securities [Line Items] |  |  |
Shares authorized | 1,720,000 |  |
Preferred Stock, Shares Issued | 0 | 0 | 0
Preferred Stock, Shares Outstanding | 0 | 0 | 0
Par value of stock | $ 25 |  |
Louisville Gas And Electric Co [Member] | Preferred Stock Without Par Value [Member] |  |  |
Preferred Securities [Line Items] |  |  |
Shares authorized | 6,750,000 |  |
Preferred Stock, Shares Issued | 0 | 0 | 0
Preferred Stock, Shares Outstanding | 0 | 0 | 0
Kentucky Utilities Co [Member] | Preferred Stock Without Par Value [Member] |  |  |
Preferred Securities [Line Items] |  |  |
Shares authorized | 5,300,000 |  |
Preferred Stock, Shares Issued | 0 | 0 | 0
Preferred Stock, Shares Outstanding | 0 | 0 | 0
Kentucky Utilities Co [Member] | Preference Stock Without Par Value [Member] |  |  |
Preferred Securities [Line Items] |  |  |
Shares authorized | 2,000,000 |  |
Preferred Stock, Shares Issued | 0 | 0 | 0
Preferred Stock, Shares Outstanding | 0 | 0 | 0

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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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