Segment Information (Details Textuals)	6 Months Ended
Jun. 30, 2011
Segment Information (Textuals) [Abstract]
Number of existing utility operating companies	10
Previous [Member]
Segment Reporting Information [Line Items]
Reportable Operating Segments	3
Current [Member]
Segment Reporting Information [Line Items]
Reportable Operating Segments	2
Regulated Distribution
Segment Reporting Information [Line Items]
Number of customers served by utility operating companies	6,000,000
Number of square miles in service area	67,000
Competitive Energy Services
Segment Reporting Information [Line Items]
Megawatts of net demonstrated capacity of competitive segment	20,000
Number of generation facilities from which the company purchases entire output	18
Number of facilities of which the company owns, operates and controls electric generation capacity	18
Equity ownership percentage by parent	59.00%
Generation capacity of the facility from which all the company's revenue generated	1,109
Competitive Energy Services \| AGC
Segment Reporting Information [Line Items]
Ownership interest	40.00%
Competitive Energy Services \| MP
Segment Reporting Information [Line Items]
Ownership interest	41.00%

Equity ownership percentage by parent.

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- Definition

Generation Capacity of the facility from which all the company's revenue generated.

+ Details

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Namespace Prefix:	fe
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	duration

- Definition

Number Of Customers.

+ Details

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Namespace Prefix:	fe
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of existing utility operating companies.

+ Details

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- Definition

Number of facilities of which the company owns, operates and controls electric generation capacity.

+ Details

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Namespace Prefix:	fe
Data Type:	xbrli:integerItemType
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- Definition

Number of generation facilities from which the company purchases entire output.

+ Details

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Namespace Prefix:	fe
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Plant Capacity.

+ Details

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Namespace Prefix:	fe
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	instant

- Definition

Reportable Operating Segments.

+ Details

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- Definition

Segment Information.

+ Details

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- Definition

Service Area.

+ Details

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 159
-Paragraph 18
-Subparagraph f
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Principles Board Opinion (APB)
-Number 18
-Paragraph 20
-Subparagraph a (1)
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

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