Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Cash Flow Hedges, Tax	$ (1,000,000)	$ (1,000,000)	$ 3,000,000	$ 7,000,000
Securities Available for Sale, Tax	0	0	0	1,000,000
Amortization of Pension and OPEB Deferred Costs, Tax	1,000,000	4,000,000	2,000,000	9,000,000
Appalachian Power Co [Member]
Cash Flow Hedges, Tax	92,000	12,000	314,000	737,000
Amortization of Pension and OPEB Deferred Costs, Tax	(179,000)	193,000	(538,000)	579,000
Indiana Michigan Power Co [Member]
Cash Flow Hedges, Tax	220,000	132,000	638,000	1,986,000
Amortization of Pension and OPEB Deferred Costs, Tax	22,000	94,000	68,000	283,000
Ohio Power Co [Member]
Cash Flow Hedges, Tax	(185,000)	(363,000)	(611,000)	(83,000)
Amortization of Pension and OPEB Deferred Costs, Tax	0	1,607,000	0	5,128,000
Public Service Co Of Oklahoma [Member]
Cash Flow Hedges, Tax	(102,000)	(92,000)	(337,000)	(319,000)
Southwestern Electric Power Co [Member]
Cash Flow Hedges, Tax	305,000	317,000	881,000	902,000
Amortization of Pension and OPEB Deferred Costs, Tax	$ (126,000)	$ (35,000)	$ (379,000)	$ (103,000)