Short-Term Borrowings and Bank Lines of Credit (Details 2)	Dec. 31, 2012	Dec. 31, 2011
Weighted average interest rates on short-term borrowings outstanding
Weighted average interest rates on short-term borrowings outstanding	1.97%	0.00%
FES
Weighted average interest rates on short-term borrowings outstanding
Weighted average interest rates on short-term borrowings outstanding	0.00%	0.53%
JCP&L
Weighted average interest rates on short-term borrowings outstanding
Weighted average interest rates on short-term borrowings outstanding	0.85%	0.51%

Reflects the calculation as of the balance sheet date of the average interest rate weighted by the amount of short-term debt outstanding by type or by instrument at that time.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Subparagraph b

-Article 5

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant