Income Taxes (Details) (Ohio Power Co [Member], USD $) In Thousands, unless otherwise specified	6 Months Ended
Jun. 30, 2012
Ohio Power Co [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at December 31,	$ 43,565
Increase - Tax Positions Taken During a Prior Period	0
Decrease - Tax Positions Taken During a Prior Period	(23,813)
Increase - Tax Positions Taken During the Current Year	0
Decrease - Tax Positions Taken During the Current Year	0
Decrease - Settlements with Taxing Authorities	(4,742)
Decrease - Lapse of the Applicable Statute of Limitations	0
Balance at June 30,	$ 15,010

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The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date.

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