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Income Taxes (Tables) (Ohio Power Co [Member])
6 Months Ended
Jun. 30, 2012
Ohio Power Co [Member]
 
Reconciliation of Beginning and Ending Unrecognized Tax Benefits
   OPCo
   (in thousands)
 Balance at December 31, 2011 $ 43,565
 Increase - Tax Positions Taken During a Prior Period   -
 Decrease - Tax Positions Taken During a Prior Period   (23,813)
 Increase - Tax Positions Taken During the Current Year   -
 Decrease - Tax Positions Taken During the Current Year   -
 Decrease - Settlements with Taxing Authorities   (4,742)
 Decrease - Lapse of the Applicable Statute of Limitations   -
 Balance at June 30, 2012 $ 15,010