Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash Flow Hedges, Tax	$ 13,000,000	$ 6,000,000
Securities Available for Sale, Tax	1,000,000	1,000,000
Amortization of Pension and OPEB Deferred Costs, Tax	3,000,000	4,000,000
Appalachian Power Co [Member]
Cash Flow Hedges, Tax	677,000	290,000
Amortization of Pension and OPEB Deferred Costs, Tax	193,000	484,000
Indiana Michigan Power Co [Member]
Cash Flow Hedges, Tax	1,682,000	1,322,000
Amortization of Pension and OPEB Deferred Costs, Tax	94,000	150,000
Ohio Power Co [Member]
Cash Flow Hedges, Tax	574,000	937,000
Amortization of Pension and OPEB Deferred Costs, Tax	1,760,000	1,745,000
Public Service Co Of Oklahoma [Member]
Cash Flow Hedges, Tax	90,000	29,000
Southwestern Electric Power Co [Member]
Cash Flow Hedges, Tax	321,000	956,000
Amortization of Pension and OPEB Deferred Costs, Tax	$ 34,000	$ 89,000