Consolidated Statements of Comprehensive Income (Loss) (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net Income (Loss)	$ 364,000,000	$ 390,000,000
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	24,000,000	(11,000,000)
Securities Available for Sale, Net of Tax	1,000,000	2,000,000
Amortization of Pension and OPEB Deferred Costs, Net of Tax	6,000,000	7,000,000
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	31,000,000	(2,000,000)
TOTAL COMPREHENSIVE INCOME (LOSS)	395,000,000	388,000,000
Total Comprehensive Income Attributable to Noncontrolling Interest	1,000,000	1,000,000
TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS	394,000,000	387,000,000
Appalachian Power Co [Member]
Net Income (Loss)	70,548,000	75,311,000
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	1,258,000	(539,000)
Amortization of Pension and OPEB Deferred Costs, Net of Tax	358,000	900,000
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	1,616,000	361,000
TOTAL COMPREHENSIVE INCOME (LOSS)	72,164,000	75,672,000
Indiana Michigan Power Co [Member]
Net Income (Loss)	43,457,000	39,221,000
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	3,123,000	2,456,000
Amortization of Pension and OPEB Deferred Costs, Net of Tax	176,000	279,000
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	3,299,000	2,735,000
TOTAL COMPREHENSIVE INCOME (LOSS)	46,756,000	41,956,000
Ohio Power Co [Member]
Net Income (Loss)	129,774,000	150,830,000
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	1,066,000	(1,741,000)
Amortization of Pension and OPEB Deferred Costs, Net of Tax	3,269,000	3,241,000
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	4,335,000	1,500,000
TOTAL COMPREHENSIVE INCOME (LOSS)	134,109,000	152,330,000
Public Service Co Of Oklahoma [Member]
Net Income (Loss)	13,693,000	12,648,000
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	(167,000)	(53,000)
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	(167,000)	(53,000)
TOTAL COMPREHENSIVE INCOME (LOSS)	13,526,000	12,595,000
Southwestern Electric Power Co [Member]
Net Income (Loss)	11,548,000	36,395,000
OTHER COMPREHENSIVE INCOME
Cash Flow Hedges, Net of Tax	596,000	(1,775,000)
Amortization of Pension and OPEB Deferred Costs, Net of Tax	(63,000)	165,000
TOTAL OTHER COMPREHENSIVE INCOME (LOSS)	533,000	(1,610,000)
TOTAL COMPREHENSIVE INCOME (LOSS)	12,081,000	34,785,000
Total Comprehensive Income Attributable to Noncontrolling Interest	1,090,000	1,083,000
TOTAL COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO SHAREHOLDERS	$ 10,991,000	$ 33,702,000