Financing Activities (Long-term Debt and Equity Securities) (Details) (USD $) In Millions, unless otherwise specified	Feb. 26, 2015
At-the-Market Stock Offering Program (Numeric) [Abstract]
Aggregate sales price of common stock based on two separate equity distribution agreements	$ 500ppl_CommonStockAggregateSalesPrice

Aggregate amount of common stock that the company may sell from time to time based on two separate equity distribution agreements.

No definition available.

Name:	ppl_CommonStockAggregateSalesPrice
Namespace Prefix:	ppl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant