Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Cash Flow Hedges, Tax	$ 1,000,000	$ 7,000,000	$ 7,000,000	$ 4,000,000
Securities Available for Sale, Tax	0	0	1,000,000	1,000,000
Amortization of Pension and OPEB Deferred Costs, Tax	4,000,000	4,000,000	9,000,000	12,000,000
Appalachian Power Co [Member]
Cash Flow Hedges, Tax	12,000	925,000	737,000	940,000
Amortization of Pension and OPEB Deferred Costs, Tax	193,000	484,000	579,000	1,453,000
Indiana Michigan Power Co [Member]
Cash Flow Hedges, Tax	132,000	(217,000)	1,986,000	(2,897,000)
Amortization of Pension and OPEB Deferred Costs, Tax	94,000	150,000	283,000	450,000
Ohio Power Co [Member]
Cash Flow Hedges, Tax	363,000	956,000	83,000	111,000
Amortization of Pension and OPEB Deferred Costs, Tax	1,607,000	1,745,000	5,128,000	5,234,000
Public Service Co Of Oklahoma [Member]
Cash Flow Hedges, Tax	92,000	28,000	319,000	250,000
Southwestern Electric Power Co [Member]
Cash Flow Hedges, Tax	317,000	376,000	902,000	367,000
Amortization of Pension and OPEB Deferred Costs, Tax	$ 35,000	$ 90,000	$ 103,000	$ 269,000