Leases (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Future minimum capital lease payments
2012	$ 25
2013	24
2014	22
2015	20
2016	17
Years thereafter	27
Total minimum lease payments	135
Executory costs	0
Net minimum lease payments	135
Interest portion	(27)
Present value of net minimum lease payments	108
Less current portion	23
Noncurrent portion	85
FES
Future minimum capital lease payments
2012	6
2013	6
2014	6
2015	6
2016	6
Years thereafter	5
Total minimum lease payments	35
Executory costs	0
Net minimum lease payments	35
Interest portion	(4)
Present value of net minimum lease payments	31
Less current portion	5
Noncurrent portion	26
OE
Future minimum capital lease payments
2012	2
2013	2
2014	2
2015	2
2016	2
Years thereafter	3
Total minimum lease payments	13
Executory costs	0
Net minimum lease payments	13
Interest portion	(2)
Present value of net minimum lease payments	11
Less current portion	1
Noncurrent portion	10
CEI
Future minimum capital lease payments
2012	2
2013	2
2014	2
2015	2
2016	2
Years thereafter	2
Total minimum lease payments	12
Executory costs	0
Net minimum lease payments	12
Interest portion	(4)
Present value of net minimum lease payments	8
Less current portion	1
Noncurrent portion	7
Met-Ed
Future minimum capital lease payments
2012	1
2013	1
2014	1
2015	1
2016	0
Years thereafter	0
Total minimum lease payments	4
Executory costs	0
Net minimum lease payments	4
Interest portion	0
Present value of net minimum lease payments	4
Less current portion	0
Noncurrent portion	4
Penelec
Future minimum capital lease payments
2012	1
2013	1
2014	1
2015	1
2016	0
Years thereafter	0
Total minimum lease payments	4
Executory costs	0
Net minimum lease payments	4
Interest portion	0
Present value of net minimum lease payments	4
Less current portion	0
Noncurrent portion	$ 4

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid within one year (or one operating cycle, if longer) of the balance sheet date.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

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-Publisher FASB

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-Number 13

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-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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Article 5

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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-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

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The total of contractually required rental payments on leases meeting the criteria for capitalization.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 16

-Subparagraph a(ii)

-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 FASB

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Contractually required rental payments on leases meeting the criteria for capitalization, due within one year of the balance sheet date.

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Contractually required rental payments on leases meeting the criteria for capitalization, due within the fifth year from the balance sheet date.

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Contractually required rental payments on leases meeting the criteria for capitalization, due within the fourth year from the balance sheet date.

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Contractually required rental payments on leases meeting the criteria for capitalization, due within the third year from the balance sheet date.

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Contractually required rental payments on leases meeting the criteria for capitalization, due within the second year from the balance sheet date.

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Contractually required rental payments due on leases meeting the criteria for capitalization, after the fifth year from the balance sheet date.

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- Definition

Amounts to be paid by lessee to lessor for maintenance, insurance, and tax expenses related to the leased asset.

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- Definition

Amount necessary to reduce net minimum lease payments to present value calculated at the lesser of the interest rate implicit in the lease (if known) or the entity's incremental borrowing rate (as defined) at inception of the lease.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 10

-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 FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 13

-Paragraph 16

-Subparagraph a(ii)

-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 13

-Paragraph 7

-Subparagraph d

-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 Accounting Standards Codification

-Topic 840

-SubTopic 30

-Section 50

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The total contractually required rental payments on capitalized leases net of deductions for: (i) executory costs, including any profit thereon, included in the minimum lease payments and (ii) the amount of imputed interest necessary to reduce the net minimum lease payments to present value.

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The discounted value of future cash flows under leases meeting the criteria for capitalization.

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