Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net Income (Loss)	$ 520,000	$ 494,000	$ 1,582,000	$ 1,446,000
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	(6,000)	(2,000)	(11,000)	6,000
Securities Available for Sale, Net of Tax	(1,000)	0	(1,000)	1,000
Amortization of Pension and OPEB Deferred Costs, Net of Tax	0	1,000	1,000	3,000
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	(7,000)	(1,000)	(11,000)	10,000
TOTAL COMPREHENSIVE INCOME (LOSS)	513,000	493,000	1,571,000	1,456,000
Total Comprehensive Income Attributable to Noncontrolling Interest	1,000	1,000	4,000	3,000
TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS	512,000	492,000	1,567,000	1,453,000
Appalachian Power Co [Member]
Net Income (Loss)	74,596	48,758	275,441	186,856
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	(222)	170	(91)	582
Amortization of Pension and OPEB Deferred Costs, Net of Tax	(458)	(333)	(1,374)	(999)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	(680)	(163)	(1,465)	(417)
TOTAL COMPREHENSIVE INCOME (LOSS)	73,916	48,595	273,976	186,439
Indiana Michigan Power Co [Member]
Net Income (Loss)	56,652	26,626	179,907	141,049
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	267	410	802	1,185
Amortization of Pension and OPEB Deferred Costs, Net of Tax	11	42	33	128
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	278	452	835	1,313
TOTAL COMPREHENSIVE INCOME (LOSS)	56,930	27,078	180,742	142,362
Ohio Power Co [Member]
Net Income (Loss)	71,569	54,060	184,688	171,369
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	(344)	(343)	(1,030)	(1,134)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	(344)	(343)	(1,030)	(1,134)
TOTAL COMPREHENSIVE INCOME (LOSS)	71,225	53,717	183,658	170,235
Public Service Co Of Oklahoma [Member]
Net Income (Loss)	44,739	45,086	85,522	75,983
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	(189)	(190)	(569)	(626)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	(189)	(190)	(569)	(626)
TOTAL COMPREHENSIVE INCOME (LOSS)	44,550	44,896	84,953	75,357
Southwestern Electric Power Co [Member]
Net Income (Loss)	82,126	74,547	188,289	130,332
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	432	567	1,566	1,636
Amortization of Pension and OPEB Deferred Costs, Net of Tax	(240)	(235)	(719)	(704)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	192	332	847	932
TOTAL COMPREHENSIVE INCOME (LOSS)	82,318	74,879	189,136	131,264
Total Comprehensive Income Attributable to Noncontrolling Interest	1,013	1,109	3,002	3,337
TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 81,305	$ 73,770	$ 186,134	$ 127,927