Business combination acquired debt carrying value.

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- Definition

Business combination acquired Debt fair value.

+ Details

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- Definition

Cash receivables payables deferred taxes accrued income balance excluded from available for sale securities.

+ Details

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- Definition

Fair Value of Financial Instruments.

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- Definition

Fair Value of Financial Instruments.

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- Definition

Investments excludes receivables payables deferred taxes and accrued income.

+ Details

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- Definition

Investments not required to be disclosed.

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- Definition

Liabilities Of Assets Held For Sale Long Term Debt

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- Definition

Proceeds from (Payment For) Assignation Of Fuel Contract

+ Details

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- Definition

Fuel costs incurred that are directly related to goods produced and sold and services rendered during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2(a),(d))

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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- Definition

The total of financial instruments that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time) or for debt and equity securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Trading Securities

-URI http://asc.fasb.org/extlink&oid=6526789

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 12

-Subparagraph a

-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 Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 29

-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 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 13

-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 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.4)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26626-111562

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Implementation Guide (Q and A)

-Number FAS115

-Paragraph 35

-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 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562

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Fair Value Measurements (Details Textuals) (USD $)	3 Months Ended		9 Months Ended
Fair Value Measurements (Details Textuals) (USD $)	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Fair Value of Financial Instruments [Line Items]
Proceeds from assignation of long-term fossil fuel contract	$ 130,000,000
Fuel Costs	632,000,000	400,000,000	1,720,000,000	1,084,000,000
Cash balance excluded from available for sale securities	1,526,000,000		1,526,000,000		193,000,000
Investment excludes Receivables, Payables and Accrued income	(29,000,000)		(29,000,000)		(7,000,000)
Fair Value of Financial Instruments (Textuals) [Abstract]
Investments not required to be disclosed	312,000,000		312,000,000		259,000,000
Debt assumed-carrying value	4,375,000,000		4,375,000,000
Debt assumed- Fair value	4,515,000,000		4,515,000,000
FES
Fair Value of Financial Instruments [Line Items]
Fuel Costs	386,000,000	391,000,000	1,045,000,000	1,062,000,000
Cash balance excluded from available for sale securities	872,000,000		872,000,000		153,000,000
Investment excludes Receivables, Payables and Accrued income	(31,000,000)		(31,000,000)		7,000,000
Securities held for trading purposes	0		0
OE
Fair Value of Financial Instruments [Line Items]
Cash balance excluded from available for sale securities	136,000,000		136,000,000		3,000,000
Investment excludes Receivables, Payables and Accrued income	(2,000,000)		(2,000,000)		1,000,000
TE
Fair Value of Financial Instruments [Line Items]
Cash balance excluded from available for sale securities	9,000,000		9,000,000		34,000,000
Investment excludes Receivables, Payables and Accrued income					2,000,000
JCP&L
Fair Value of Financial Instruments [Line Items]
Cash balance excluded from available for sale securities	133,000,000		133,000,000		3,000,000
Investment excludes Receivables, Payables and Accrued income	6,000,000		6,000,000		(3,000,000)
Met-Ed
Fair Value of Financial Instruments [Line Items]
Cash balance excluded from available for sale securities	229,000,000		229,000,000		(3,000,000)
Investment excludes Receivables, Payables and Accrued income	(3,000,000)		(3,000,000)		(9,000,000)
Penelec
Fair Value of Financial Instruments [Line Items]
Cash balance excluded from available for sale securities	147,000,000		147,000,000		4,000,000
Investment excludes Receivables, Payables and Accrued income	1,000,000		1,000,000		(3,000,000)
Carrying (Reported) Amount, Fair Value Disclosure [Member]
Fair Value of Financial Instruments (Textuals) [Abstract]
Debt Related To Assets Pending Sale	363,000,000		363,000,000
Fossil Fuel [Member]
Fair Value of Financial Instruments [Line Items]
Fuel Costs	$ (123,000,000)