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Summary of Significant Accounting Policies (Policies)
9 Months Ended
Sep. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Receivables, Policy
Accounts Receivable
 
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.
PPL Electric Utilities Corp [Member]  
New Accounting Pronouncements or Change in Accounting Principle [Line Items]  
Receivables, Policy
Accounts Receivable
 
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.