Available Liquidity

No definition available.

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Namespace Prefix:	fe_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

-URI http://asc.fasb.org/extlink&oid=6506951

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 1

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

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

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

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),22(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, 22

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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Balance Type:	na
Period Type:	duration

- Details

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- Details

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- Details

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Namespace Prefix:
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- Details

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Short-Term Borrowings and Bank Lines of Credit (Details) (USD $)	Jan. 31, 2015	Dec. 31, 2014
Subsequent Event
Short-term Debt [Line Items]
Maximum amount borrowed under revolving credit facility	$ 6,000,000,000
Available Liquidity	3,904,000,000
Cash, Available Liquidity	58,000,000
Total Available Liquidity	3,962,000,000
FirstEnergy
Short-term Debt [Line Items]
Maximum amount borrowed under revolving credit facility		3,500,000,000
FirstEnergy \| Revolving Credit Facility \| Subsequent Event
Short-term Debt [Line Items]
Available Liquidity	1,469,000,000
FES / AE Supply \| Revolving Credit Facility \| Subsequent Event
Short-term Debt [Line Items]
Available Liquidity	1,435,000,000
FET
Short-term Debt [Line Items]
Maximum amount borrowed under revolving credit facility		1,000,000,000
FET \| Revolving Credit Facility \| Subsequent Event
Short-term Debt [Line Items]
Available Liquidity	1,000,000,000
Revolving Credit Facility \| FirstEnergy \| Subsequent Event
Short-term Debt [Line Items]
Maximum amount borrowed under revolving credit facility	3,500,000,000
Revolving Credit Facility \| FES / AE Supply \| Subsequent Event
Short-term Debt [Line Items]
Maximum amount borrowed under revolving credit facility	1,500,000,000
Revolving Credit Facility \| FET \| Subsequent Event
Short-term Debt [Line Items]
Maximum amount borrowed under revolving credit facility	$ 1,000,000,000