Consolidated Statements of Comprehensive Income (Loss) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
NET INCOME (LOSS)	$ 390,000,000	$ 355,000,000
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	(11,000,000)	1,000,000
Securities Available for Sale, Net of Tax	2,000,000	1,000,000
Amortization of Pension and OPEB Deferred Costs, Net of Tax	7,000,000	6,000,000
Other Comprehensive Income (Loss)	(2,000,000)	8,000,000
TOTAL COMPREHENSIVE INCOME (LOSS)	388,000,000	363,000,000
Total Comprehensive Income Attributable to Noncontrolling Interest	1,000,000	1,000,000
TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO SHAREHOLDERS	387,000,000	362,000,000
Preferred Stock Dividend Requirements	0	1,000,000
TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS	387,000,000	361,000,000
Appalachian Power Co [Member]
NET INCOME (LOSS)	75,311,000	38,980,000
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	(539,000)	511,000
Amortization of Pension and OPEB Deferred Costs, Net of Tax	900,000	777,000
Other Comprehensive Income (Loss)	361,000	1,288,000
TOTAL COMPREHENSIVE INCOME (LOSS)	75,672,000	40,268,000
Preferred Stock Dividend Requirements	0	200,000
Indiana Michigan Power Co [Member]
NET INCOME (LOSS)	39,221,000	45,427,000
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	2,456,000	531,000
Amortization of Pension and OPEB Deferred Costs, Net of Tax	279,000	237,000
Other Comprehensive Income (Loss)	2,735,000	768,000
TOTAL COMPREHENSIVE INCOME (LOSS)	41,956,000	46,195,000
Preferred Stock Dividend Requirements	0	85,000
Ohio Power Co [Member]
NET INCOME (LOSS)	150,830,000	165,970,000
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	(1,741,000)	293,000
Amortization of Pension and OPEB Deferred Costs, Net of Tax	3,241,000	2,641,000
Other Comprehensive Income (Loss)	1,500,000	2,934,000
TOTAL COMPREHENSIVE INCOME (LOSS)	152,330,000	168,904,000
Preferred Stock Dividend Requirements	0	208,000
Public Service Co Of Oklahoma [Member]
NET INCOME (LOSS)	12,648,000	15,389,000
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	(53,000)	(443,000)
Other Comprehensive Income (Loss)	(53,000)	(443,000)
TOTAL COMPREHENSIVE INCOME (LOSS)	12,595,000	14,946,000
Preferred Stock Dividend Requirements	0	49,000
Southwestern Electric Power Co [Member]
NET INCOME (LOSS)	36,395,000	29,827,000
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	(1,775,000)	376,000
Amortization of Pension and OPEB Deferred Costs, Net of Tax	165,000	128,000
Other Comprehensive Income (Loss)	(1,610,000)	504,000
TOTAL COMPREHENSIVE INCOME (LOSS)	34,785,000	30,331,000
Total Comprehensive Income Attributable to Noncontrolling Interest	1,083,000	1,082,000
TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO SHAREHOLDERS	33,702,000	29,249,000
Preferred Stock Dividend Requirements	$ 0	$ 57,000