Summary of Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2014
Summary Of Significant Accounting Policies [Line Items]
Accounts Receivable	Accounts Receivable (PPL, PPL Energy Supply and PPL Electric) In accordance with a PUC-approved purchase of accounts receivable program designed to facilitate competitive markets for electricity in Pennsylvania, PPL Electric purchases certain accounts receivable from alternative electricity suppliers (including PPL EnergyPlus) at a discount, which reflects a provision for uncollectible accounts. The alternative electricity suppliers have no continuing involvement or interest in the purchased accounts receivable. The purchased accounts receivable are initially recorded at fair value using a market approach based on the purchase price paid and are classified as Level 2 in the fair value hierarchy. During the three and six months ended June 30, 2014, PPL Electric purchased $253 million and $614 million of accounts receivable from unaffiliated third parties and $79 million and $184 million from PPL EnergyPlus. During the three and six months ended June 30, 2013, PPL Electric purchased $220 million and $479 million of accounts receivable from unaffiliated third parties and $70 million and $147 million from PPL EnergyPlus.
New Accounting Guidance Adopted	New Accounting Guidance Adopted (All Registrants) Accounting for Obligations Resulting from Joint and Several Liability Arrangements Effective January 1, 2014, the Registrants retrospectively adopted accounting guidance for the recognition, measurement and disclosure of certain obligations resulting from joint and several liability arrangements when the amount of the obligation is fixed at the reporting date. If the obligation is determined to be in the scope of this guidance, it will be measured as the sum of the amount the reporting entity agreed to pay on the basis of its arrangements among its co-obligors and any additional amount the reporting entity expects to pay on behalf of its co-obligors. This guidance also requires additional disclosures for these obligations. The adoption of this guidance did not have a significant impact on the Registrants. Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity Effective January 1, 2014, PPL prospectively adopted accounting guidance that requires a cumulative translation adjustment to be released into earnings when an entity ceases to have a controlling financial interest in a subsidiary or group of assets within a consolidated foreign entity and the sale or transfer results in the complete or substantially complete liquidation of the foreign entity. For the step acquisition of previously held equity method investments that are foreign entities, this guidance clarifies that the amount of accumulated other comprehensive income that is reclassified and included in the calculation of a gain or loss shall include any foreign currency translation adjustment related to that previously held investment. The initial adoption of this guidance did not have a significant impact on PPL; however, the impact in future periods could be material. Presentation of Unrecognized Tax Benefits When Net Operating Loss Carryforwards, Similar Tax Losses, or Tax Credit Carryforwards Exist Effective January 1, 2014, the Registrants prospectively adopted accounting guidance that requires an unrecognized tax benefit, or a portion of an unrecognized tax benefit, to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position, or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The adoption of this guidance did not have a significant impact on the Registrants.
PPL Electric Utilities Corp [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounts Receivable	Accounts Receivable (PPL, PPL Energy Supply and PPL Electric) In accordance with a PUC-approved purchase of accounts receivable program designed to facilitate competitive markets for electricity in Pennsylvania, PPL Electric purchases certain accounts receivable from alternative electricity suppliers (including PPL EnergyPlus) at a discount, which reflects a provision for uncollectible accounts. The alternative electricity suppliers have no continuing involvement or interest in the purchased accounts receivable. The purchased accounts receivable are initially recorded at fair value using a market approach based on the purchase price paid and are classified as Level 2 in the fair value hierarchy. During the three and six months ended June 30, 2014, PPL Electric purchased $253 million and $614 million of accounts receivable from unaffiliated third parties and $79 million and $184 million from PPL EnergyPlus. During the three and six months ended June 30, 2013, PPL Electric purchased $220 million and $479 million of accounts receivable from unaffiliated third parties and $70 million and $147 million from PPL EnergyPlus.
PPL Energy Supply LLC [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounts Receivable	Accounts Receivable (PPL, PPL Energy Supply and PPL Electric) In accordance with a PUC-approved purchase of accounts receivable program designed to facilitate competitive markets for electricity in Pennsylvania, PPL Electric purchases certain accounts receivable from alternative electricity suppliers (including PPL EnergyPlus) at a discount, which reflects a provision for uncollectible accounts. The alternative electricity suppliers have no continuing involvement or interest in the purchased accounts receivable. The purchased accounts receivable are initially recorded at fair value using a market approach based on the purchase price paid and are classified as Level 2 in the fair value hierarchy. During the three and six months ended June 30, 2014, PPL Electric purchased $253 million and $614 million of accounts receivable from unaffiliated third parties and $79 million and $184 million from PPL EnergyPlus. During the three and six months ended June 30, 2013, PPL Electric purchased $220 million and $479 million of accounts receivable from unaffiliated third parties and $70 million and $147 million from PPL EnergyPlus.

Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2014

Summary Of Significant Accounting Policies [Line Items]

Accounts Receivable (PPL, PPL Energy Supply and PPL Electric)

In accordance with a PUC-approved purchase of accounts receivable program designed to facilitate competitive markets for electricity in Pennsylvania, PPL Electric purchases certain accounts receivable from alternative electricity suppliers (including PPL EnergyPlus) at a discount, which reflects a provision for uncollectible accounts. The alternative electricity suppliers have no continuing involvement or interest in the purchased accounts receivable. The purchased accounts receivable are initially recorded at fair value using a market approach based on the purchase price paid and are classified as Level 2 in the fair value hierarchy. During the three and six months ended June 30, 2014, PPL Electric purchased $253 million and $614 million of accounts receivable from unaffiliated third parties and $79 million and $184 million from PPL EnergyPlus. During the three and six months ended June 30, 2013, PPL Electric purchased $220 million and $479 million of accounts receivable from unaffiliated third parties and $70 million and $147 million from PPL EnergyPlus.

New Accounting Guidance Adopted

New Accounting Guidance Adopted (All Registrants)

Accounting for Obligations Resulting from Joint and Several Liability Arrangements

Effective January 1, 2014, the Registrants retrospectively adopted accounting guidance for the recognition, measurement and disclosure of certain obligations resulting from joint and several liability arrangements when the amount of the obligation is fixed at the reporting date. If the obligation is determined to be in the scope of this guidance, it will be measured as the sum of the amount the reporting entity agreed to pay on the basis of its arrangements among its co-obligors and any additional amount the reporting entity expects to pay on behalf of its co-obligors. This guidance also requires additional disclosures for these obligations.

The adoption of this guidance did not have a significant impact on the Registrants.

Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity

Effective January 1, 2014, PPL prospectively adopted accounting guidance that requires a cumulative translation adjustment to be released into earnings when an entity ceases to have a controlling financial interest in a subsidiary or group of assets within a consolidated foreign entity and the sale or transfer results in the complete or substantially complete liquidation of the foreign entity. For the step acquisition of previously held equity method investments that are foreign entities, this guidance clarifies that the amount of accumulated other comprehensive income that is reclassified and included in the calculation of a gain or loss shall include any foreign currency translation adjustment related to that previously held investment.

The initial adoption of this guidance did not have a significant impact on PPL; however, the impact in future periods could be material.

Presentation of Unrecognized Tax Benefits When Net Operating Loss Carryforwards, Similar Tax Losses, or Tax Credit Carryforwards Exist

Effective January 1, 2014, the Registrants prospectively adopted accounting guidance that requires an unrecognized tax benefit, or a portion of an unrecognized tax benefit, to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. To the extent a net operating loss carryforward, a similar tax loss, or a tax credit carryforward is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position, or the tax law of the applicable jurisdiction does not require the entity to use, and the entity does not intend to use, the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets.

The adoption of this guidance did not have a significant impact on the Registrants.

PPL Electric Utilities Corp [Member]

Summary Of Significant Accounting Policies [Line Items]

Accounts Receivable

Accounts Receivable (PPL, PPL Energy Supply and PPL Electric)

PPL Energy Supply LLC [Member]

Summary Of Significant Accounting Policies [Line Items]

Accounts Receivable

Accounts Receivable (PPL, PPL Energy Supply and PPL Electric)

- Definition

Disclosure of accounting policy for trade and other accounts receivable, and finance, loan and lease receivables, including those classified as held for investment and held for sale. This disclosure may include (1) the basis at which such receivables are carried in the entity's statements of financial position (2) how the level of the valuation allowance for receivables is determined (3) when impairments, charge-offs or recoveries are recognized for such receivables (4) the treatment of origination fees and costs, including the amortization method for net deferred fees or costs (5) the treatment of any premiums or discounts or unearned income (6) the entity's income recognition policies for such receivables, including those that are impaired, past due or placed on nonaccrual status and (7) the treatment of foreclosures or repossessions (8) the nature and amount of any guarantees to repurchase receivables.

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