Acquisitions, Development and Divestures (Policies)	3 Months Ended
Mar. 31, 2015
Acquisitions, Development and Divestitures [Line Items]
Interest Expense Allocated to Discontinued Operations	(a) Represents allocated interest expense based upon the discontinued operations share of the net assets of PPL Energy Supply.

Disclosure of accounting policy for allocating interest on borrowings to operations reported as being discontinued. may also include the amount allocated to and reported in discontinued operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section S99

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=26872618&loc=d3e7436-122677

Name:	us-gaap_InterestExpenseAllocatedToDiscontinuedOperationsPolicy
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration