Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 31, 2016
Summary Of Significant Accounting Policies [Line Items]
Accounts Receivable	Accounts Receivable (PPL and PPL Electric) In accordance with a PUC-approved purchase of accounts receivable program, PPL Electric purchases certain accounts receivable from alternative electricity suppliers 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 months ended March 31, 2016, PPL Electric purchased $382 million of accounts receivable from unaffiliated third parties. During the three months ended March 31, 2015, PPL Electric purchased $331 million of accounts receivable from unaffiliated third parties and $93 million from PPL EnergyPlus. As a result of the June 1, 2015 spinoff of PPL Energy Supply and creation of Talen Energy, PPL EnergyPlus (renamed Talen Energy Marketing) is no longer an affiliate of PPL Electric. PPL Electric’s purchases from Talen Energy Marketing subsequent to May 31, 2015 are included as purchases from an unaffiliated third party.
New Accounting Guidance Adopted	New Accounting Guidance Adopted (All Registrants) Accounting for Stock-Based Compensation Effective January 1, 2016, the Registrants adopted accounting guidance to simplify the accounting for share-based payment transactions. The guidance requires excess tax benefits and tax deficiencies to be recorded as income tax benefit or expense on the statement of income, eliminates the requirement that excess tax benefits be realized before companies can recognize them and changes the threshold for statutory income tax withholding requirements to qualify for equity classification to the maximum statutory tax rates in the applicable jurisdictions. This guidance also changes the classification of excess tax benefits to an operating activity and employee taxes paid when shares are withheld to satisfy the employer's statutory income tax withholding obligation to a financing activity on the statement of cash flows and allows entities to make a policy election to either estimate forfeitures or recognize them when they occur. The adoption of this guidance had the following impacts: Using the required prospective method of transition, PPL recorded a tax benefit of $8 million ($0.01 per share) and PPL Electric recorded a tax benefit of $5 million related to excess tax benefits for awards that were exercised and vested for the period ending March 31, 2016. These amounts were recorded to Income taxes on the Statements of Income and Deferred income taxes on the Balance Sheets. The impact on LKE was not significant. PPL elected to use the prospective method of transition for classifying excess tax benefits as an Operating activity on the Statement of Cash Flows. The amounts classified as Financing activities in the prior periods were not significant. Using the required modified retrospective method of transition, PPL recorded a cumulative effect adjustment of $7 million to increase Earnings reinvested and decrease Deferred income taxes on the Balance Sheet related to prior period unrecognized excess tax benefits. PPL has historically presented employee taxes paid for net settled awards as a Financing activity on the Statement of Cash Flows. Therefore, there is no transition impact for this requirement. PPL has elected to recognize forfeitures when they occur. Due to past experience of insignificant forfeitures there is no transition impact of this policy election.
PPL Electric Utilities Corp [Member]
Summary Of Significant Accounting Policies [Line Items]
Accounts Receivable	Accounts Receivable (PPL and PPL Electric) In accordance with a PUC-approved purchase of accounts receivable program, PPL Electric purchases certain accounts receivable from alternative electricity suppliers 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 months ended March 31, 2016, PPL Electric purchased $382 million of accounts receivable from unaffiliated third parties. During the three months ended March 31, 2015, PPL Electric purchased $331 million of accounts receivable from unaffiliated third parties and $93 million from PPL EnergyPlus. As a result of the June 1, 2015 spinoff of PPL Energy Supply and creation of Talen Energy, PPL EnergyPlus (renamed Talen Energy Marketing) is no longer an affiliate of PPL Electric. PPL Electric’s purchases from Talen Energy Marketing subsequent to May 31, 2015 are included as purchases from an unaffiliated third party.