Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Cash Flow Hedges, Tax	$ 5,000,000	$ 2,000,000	$ 11,000,000	$ 3,000,000
Securities Available for Sale, Tax	0	0	1,000,000	0
Amortization of Pension and OPEB Deferred Costs, Tax	4,000,000	3,000,000	8,000,000	6,000,000
Appalachian Power Co [Member]
Cash Flow Hedges, Tax	305,000	377,000	15,000	652,000
Amortization of Pension and OPEB Deferred Costs, Tax	484,000	419,000	969,000	837,000
Indiana Michigan Power Co [Member]
Cash Flow Hedges, Tax	(4,002,000)	284,000	(2,680,000)	570,000
Amortization of Pension and OPEB Deferred Costs, Tax	150,000	127,000	300,000	255,000
Ohio Power Co [Member]
Cash Flow Hedges, Tax	91,000	122,000	846,000	280,000
Amortization of Pension and OPEB Deferred Costs, Tax	1,745,000	1,422,000	3,490,000	2,844,000
Public Service Co Of Oklahoma [Member]
Cash Flow Hedges, Tax	193,000	168,000	222,000	407,000
Southwestern Electric Power Co [Member]
Cash Flow Hedges, Tax	213,000	65,000	743,000	137,000
Amortization of Pension and OPEB Deferred Costs, Tax	$ 90,000	$ 612,000	$ 179,000	$ 681,000