Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Cash Flow Hedges, Tax	$ 5,000,000	$ 5,000,000	$ 8,000,000	$ 11,000,000
Securities Available for Sale, Tax	0	0	0	1,000,000
Amortization of Pension and OPEB Deferred Costs, Tax	2,000,000	4,000,000	5,000,000	8,000,000
Appalachian Power Co [Member]
Cash Flow Hedges, Tax	48,000	305,000	725,000	15,000
Amortization of Pension and OPEB Deferred Costs, Tax	193,000	484,000	386,000	969,000
Indiana Michigan Power Co [Member]
Cash Flow Hedges, Tax	172,000	(4,002,000)	1,854,000	(2,680,000)
Amortization of Pension and OPEB Deferred Costs, Tax	95,000	150,000	189,000	300,000
Ohio Power Co [Member]
Cash Flow Hedges, Tax	293,000	91,000	281,000	846,000
Amortization of Pension and OPEB Deferred Costs, Tax	1,760,000	1,745,000	3,520,000	3,490,000
Public Service Co Of Oklahoma [Member]
Cash Flow Hedges, Tax	137,000	193,000	227,000	222,000
Southwestern Electric Power Co [Member]
Cash Flow Hedges, Tax	264,000	213,000	585,000	743,000
Amortization of Pension and OPEB Deferred Costs, Tax	$ 34,000	$ 90,000	$ 68,000	$ 179,000