Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Cash Flow Hedges, Tax	$ 0	$ 1,000	$ (3,000)	$ 4,000
Securities Available for Sale, Tax	0	0	0	0
Amortization of Pension and OPEB Deferred Costs, Tax	0	1,000	0	1,000
Appalachian Power Co [Member]
Cash Flow Hedges, Tax	1	90	71	222
Amortization of Pension and OPEB Deferred Costs, Tax	(247)	(180)	(493)	(359)
Indiana Michigan Power Co [Member]
Cash Flow Hedges, Tax	144	189	288	418
Amortization of Pension and OPEB Deferred Costs, Tax	6	23	12	46
Ohio Power Co [Member]
Cash Flow Hedges, Tax	(185)	(185)	(370)	(426)
Public Service Co Of Oklahoma [Member]
Cash Flow Hedges, Tax	(103)	(103)	(205)	(235)
Southwestern Electric Power Co [Member]
Cash Flow Hedges, Tax	306	306	611	576
Amortization of Pension and OPEB Deferred Costs, Tax	$ (129)	$ (127)	$ (258)	$ (253)