Condensed Consolidated Balance Sheets (USD $)	Sep. 30, 2012		Dec. 31, 2011
Current Assets
Cash and Cash Equivalents	$ 443,000,000		$ 221,000,000
Other Temporary Investments	278,000,000		294,000,000
Accounts Receivable:
Customers	684,000,000		690,000,000
Accrued Unbilled Revenues	210,000,000		106,000,000
Pledged Accounts Receivable - AEP Credit	909,000,000		920,000,000
Miscellaneous	92,000,000		150,000,000
Allowance for Uncollectible Accounts	(40,000,000)		(32,000,000)
Total Accounts Receivable	1,855,000,000		1,834,000,000
Fuel	800,000,000		657,000,000
Materials and Supplies	662,000,000		635,000,000
Risk Management Assets	175,000,000		193,000,000
Accrued Tax Benefits	49,000,000		51,000,000
Regulatory Asset for Under-Recovered Fuel Costs	103,000,000		65,000,000
Margin Deposits	74,000,000		67,000,000
Prepayments and Other Current Assets	209,000,000		165,000,000
TOTAL CURRENT ASSETS	4,648,000,000		4,182,000,000
Property, Plant and Equipment
Generation	25,463,000,000		24,938,000,000
Transmission	9,503,000,000		9,048,000,000
Distribution	15,359,000,000		14,783,000,000
Other Property, Plant and Equipment	3,943,000,000		3,780,000,000
Construction Work in Progress	3,191,000,000		3,121,000,000
Total Property, Plant and Equipment	57,459,000,000		55,670,000,000
Accumulated Depreciation and Amortization	19,326,000,000		18,699,000,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	38,133,000,000		36,971,000,000
Other Noncurrent Assets
Regulatory Assets	5,306,000,000		6,026,000,000
Securitized Transition Assets	2,179,000,000		1,627,000,000
Spent Nuclear Fuel and Decommissioning Trusts	1,700,000,000		1,592,000,000
Goodwill	90,000,000		76,000,000
Long-term Risk Management Assets	390,000,000		403,000,000
Deferred Charges and Other Noncurrent Assets	1,397,000,000		1,346,000,000
TOTAL OTHER NONCURRENT ASSETS	11,062,000,000		11,070,000,000
TOTAL ASSETS	53,843,000,000		52,223,000,000
Current Liabilities
Accounts Payable	988,000,000		1,095,000,000
Short-term Debt:
Securitized Debt for Receivable - AEP Credit	696,000,000	[1]	666,000,000	[1]
Other Short-term Debt	520,000,000		984,000,000
Total Short-term Debt	1,216,000,000		1,650,000,000
Long-term Debt Due Within One Year	2,272,000,000		1,433,000,000
Risk Management Liabilities	150,000,000		150,000,000
Customer Deposits	295,000,000		289,000,000
Accrued Taxes	512,000,000		717,000,000
Accrued Interest	249,000,000		279,000,000
Regulatory Liability for Over-Recovered Fuel Costs	76,000,000		8,000,000
Other Current Liabilities	1,037,000,000		990,000,000
TOTAL CURRENT LIABILITIES	6,795,000,000		6,611,000,000
Noncurrent Liabilities
Long-term Debt	14,955,000,000		15,083,000,000
Long-term Risk Management Liabilities	224,000,000		195,000,000
Deferred Income Taxes	8,905,000,000		8,227,000,000
Regulatory Liabilities and Deferred Investment Tax Credits	3,589,000,000		3,195,000,000
Asset Retirement Obligations	1,535,000,000		1,472,000,000
Employee Benefits and Pension Obligations	1,611,000,000		1,801,000,000
Deferred Credits and Other Noncurrent Liabilities	923,000,000		974,000,000
TOTAL NONCURRENT LIABILITIES	31,742,000,000		30,947,000,000
TOTAL LIABILITIES	38,537,000,000		37,558,000,000
Rate Matters
Commitments and Contingencies
Equity
Common Stock	3,286,000,000		3,274,000,000
Paid-in Capital	6,030,000,000		5,970,000,000
Retained Earnings	6,444,000,000		5,890,000,000
Accumulated Other Comprehensive Income (Loss)	(454,000,000)		(470,000,000)
TOTAL COMMON SHAREHOLDER'S EQUITY	15,306,000,000		14,664,000,000
Noncontrolling Interests	0		1,000,000
TOTAL EQUITY	15,306,000,000		14,665,000,000
TOTAL LIABILITIES AND EQUITY	53,843,000,000		52,223,000,000
Appalachian Power Co [Member]
Current Assets
Cash and Cash Equivalents	1,575,000		2,317,000
Advances to Affiliates	22,767,000		22,008,000
Accounts Receivable:
Customers	159,974,000		158,382,000
Affiliated Companies	70,043,000		136,194,000
Accrued Unbilled Revenues	48,717,000		68,427,000
Miscellaneous	458,000		5,505,000
Allowance for Uncollectible Accounts	(10,884,000)		(5,289,000)
Total Accounts Receivable	268,308,000		363,219,000
Fuel	187,181,000		143,931,000
Materials and Supplies	102,481,000		101,724,000
Risk Management Assets	31,227,000		39,645,000
Accrued Tax Benefits	18,170,000		7,715,000
Regulatory Asset for Under-Recovered Fuel Costs	88,713,000		41,105,000
Prepayments and Other Current Assets	19,682,000		21,745,000
TOTAL CURRENT ASSETS	740,104,000		743,409,000
Property, Plant and Equipment
Generation	5,577,549,000		5,194,967,000
Transmission	2,007,720,000		1,943,969,000
Distribution	2,937,648,000		2,845,405,000
Other Property, Plant and Equipment	381,235,000		357,326,000
Construction Work in Progress	283,775,000		565,841,000
Total Property, Plant and Equipment	11,187,927,000		10,907,508,000
Accumulated Depreciation and Amortization	3,162,532,000		2,994,016,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	8,025,395,000		7,913,492,000
Other Noncurrent Assets
Regulatory Assets	1,416,426,000		1,481,193,000
Long-term Risk Management Assets	38,371,000		39,226,000
Deferred Charges and Other Noncurrent Assets	100,444,000		122,187,000
TOTAL OTHER NONCURRENT ASSETS	1,555,241,000		1,642,606,000
TOTAL ASSETS	10,320,740,000		10,299,507,000
Current Liabilities
Advances from Affiliates	117,574,000		198,248,000
Accounts Payable	189,323,000		186,612,000
Affiliated Companies	100,849,000		137,376,000
Short-term Debt:
Long-term Debt Due Within One Year	574,678,000		594,525,000
Risk Management Liabilities	18,326,000		26,606,000
Customer Deposits	63,459,000		61,690,000
Deferred Income Taxes	33,145,000		14,255,000
Accrued Taxes	55,075,000		63,422,000
Accrued Interest	67,110,000		57,230,000
Other Current Liabilities	105,825,000		105,646,000
TOTAL CURRENT LIABILITIES	1,325,364,000		1,445,610,000
Noncurrent Liabilities
Long-term Debt	3,127,605,000		3,131,726,000
Long-term Risk Management Liabilities	20,805,000		12,923,000
Deferred Income Taxes	1,802,416,000		1,736,180,000
Regulatory Liabilities and Deferred Investment Tax Credits	601,926,000		576,792,000
Employee Benefits and Pension Obligations	283,506,000		302,182,000
Deferred Credits and Other Noncurrent Liabilities	152,426,000		157,680,000
TOTAL NONCURRENT LIABILITIES	5,988,684,000		5,917,483,000
TOTAL LIABILITIES	7,314,048,000		7,363,093,000
Rate Matters
Commitments and Contingencies
Equity
Common Stock	260,458,000		260,458,000
Paid-in Capital	1,573,752,000		1,573,752,000
Retained Earnings	1,226,581,000		1,160,747,000
Accumulated Other Comprehensive Income (Loss)	(54,099,000)		(58,543,000)
TOTAL EQUITY	3,006,692,000		2,936,414,000
TOTAL LIABILITIES AND EQUITY	10,320,740,000		10,299,507,000
Indiana Michigan Power Co [Member]
Current Assets
Cash and Cash Equivalents	767,000		1,020,000
Advances to Affiliates	284,768,000		95,714,000
Accounts Receivable:
Customers	63,685,000		72,461,000
Affiliated Companies	76,472,000		90,980,000
Accrued Unbilled Revenues	20,229,000		14,780,000
Miscellaneous	13,488,000		22,685,000
Allowance for Uncollectible Accounts	(133,000)		(1,750,000)
Total Accounts Receivable	173,741,000		199,156,000
Fuel	53,587,000		52,979,000
Materials and Supplies	165,284,000		175,924,000
Risk Management Assets	28,502,000		32,152,000
Accrued Tax Benefits	11,413,000		38,425,000
Deferred Cook Plant Fire Costs	64,448,000		63,809,000
Prepayments and Other Current Assets	60,657,000		35,395,000
TOTAL CURRENT ASSETS	843,167,000		694,574,000
Property, Plant and Equipment
Generation	3,929,486,000		3,932,472,000
Transmission	1,272,008,000		1,224,786,000
Distribution	1,527,157,000		1,481,608,000
Other Property, Plant and Equipment	683,879,000		709,558,000
Construction Work in Progress	237,109,000		236,096,000
Total Property, Plant and Equipment	7,649,639,000		7,584,520,000
Accumulated Depreciation and Amortization	3,224,298,000		3,179,920,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	4,425,341,000		4,404,600,000
Other Noncurrent Assets
Regulatory Assets	581,048,000		602,979,000
Spent Nuclear Fuel and Decommissioning Trusts	1,699,691,000		1,591,732,000
Long-term Risk Management Assets	26,304,000		29,362,000
Deferred Charges and Other Noncurrent Assets	95,026,000		69,309,000
TOTAL OTHER NONCURRENT ASSETS	2,402,069,000		2,293,382,000
TOTAL ASSETS	7,670,577,000		7,392,556,000
Current Liabilities
Accounts Payable	95,611,000		113,063,000
Affiliated Companies	65,865,000		81,102,000
Short-term Debt:
Long-term Debt Due Within One Year	304,694,000		279,075,000
Risk Management Liabilities	33,188,000		16,980,000
Customer Deposits	30,570,000		30,696,000
Accrued Taxes	43,963,000		65,233,000
Accrued Interest	22,372,000		27,798,000
Other Current Liabilities	154,827,000		117,879,000
TOTAL CURRENT LIABILITIES	751,090,000		731,826,000
Noncurrent Liabilities
Long-term Debt	1,804,936,000		1,778,600,000
Long-term Risk Management Liabilities	14,829,000		18,871,000
Deferred Income Taxes	983,791,000		925,712,000
Regulatory Liabilities and Deferred Investment Tax Credits	974,541,000		875,202,000
Asset Retirement Obligations	1,052,773,000		1,013,122,000
Deferred Credits and Other Noncurrent Liabilities	273,898,000		288,243,000
TOTAL NONCURRENT LIABILITIES	5,104,768,000		4,899,750,000
TOTAL LIABILITIES	5,855,858,000		5,631,576,000
Rate Matters
Commitments and Contingencies
Equity
Common Stock	56,584,000		56,584,000
Paid-in Capital	980,896,000		980,896,000
Retained Earnings	810,006,000		751,721,000
Accumulated Other Comprehensive Income (Loss)	(32,767,000)		(28,221,000)
TOTAL EQUITY	1,814,719,000		1,760,980,000
TOTAL LIABILITIES AND EQUITY	7,670,577,000		7,392,556,000
Ohio Power Co [Member]
Current Assets
Cash and Cash Equivalents	1,930,000		2,095,000
Advances to Affiliates	124,606,000		219,458,000
Accounts Receivable:
Customers	103,211,000		146,432,000
Affiliated Companies	150,978,000		162,830,000
Accrued Unbilled Revenues	51,967,000		19,012,000
Miscellaneous	6,391,000		16,994,000
Allowance for Uncollectible Accounts	(26,000)		(3,563,000)
Total Accounts Receivable	312,521,000		341,705,000
Fuel	325,330,000		262,886,000
Materials and Supplies	187,899,000		201,325,000
Risk Management Assets	44,704,000		54,293,000
Accrued Tax Benefits	1,512,000		11,975,000
Prepayments and Other Current Assets	33,276,000		41,560,000
TOTAL CURRENT ASSETS	1,031,778,000		1,135,297,000
Property, Plant and Equipment
Generation	9,608,241,000		9,502,614,000
Transmission	1,986,600,000		1,948,329,000
Distribution	3,690,824,000		3,545,574,000
Other Property, Plant and Equipment	585,349,000		546,642,000
Construction Work in Progress	318,092,000		354,465,000
Total Property, Plant and Equipment	16,189,106,000		15,897,624,000
Accumulated Depreciation and Amortization	5,894,263,000		5,742,561,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	10,294,843,000		10,155,063,000
Other Noncurrent Assets
Regulatory Assets	1,455,396,000		1,370,504,000
Long-term Risk Management Assets	54,327,000		53,614,000
Deferred Charges and Other Noncurrent Assets	140,166,000		309,775,000
TOTAL OTHER NONCURRENT ASSETS	1,649,889,000		1,733,893,000
TOTAL ASSETS	12,976,510,000		13,024,253,000
Current Liabilities
Accounts Payable	233,017,000		293,730,000
Affiliated Companies	101,268,000		183,898,000
Short-term Debt:
Long-term Debt Due Within One Year	856,000,000		244,500,000
Risk Management Liabilities	26,658,000		36,561,000
Accrued Taxes	249,301,000		450,570,000
Accrued Interest	66,973,000		66,441,000
Other Current Liabilities	267,814,000		238,275,000
TOTAL CURRENT LIABILITIES	1,801,031,000		1,513,975,000
Noncurrent Liabilities
Long-term Debt	2,804,242,000		3,609,648,000
Long-term Debt - Affiliated	200,000,000		200,000,000
Long-term Risk Management Liabilities	29,513,000		17,890,000
Deferred Income Taxes	2,398,292,000		2,245,380,000
Regulatory Liabilities and Deferred Investment Tax Credits	475,437,000		301,124,000
Employee Benefits and Pension Obligations	299,560,000		335,029,000
Deferred Credits and Other Noncurrent Liabilities	329,568,000		351,029,000
TOTAL NONCURRENT LIABILITIES	6,536,612,000		7,060,100,000
TOTAL LIABILITIES	8,337,643,000		8,574,075,000
Rate Matters
Commitments and Contingencies
Equity
Common Stock	321,201,000		321,201,000
Paid-in Capital	1,744,099,000		1,744,099,000
Retained Earnings	2,761,363,000		2,582,600,000
Accumulated Other Comprehensive Income (Loss)	(187,796,000)		(197,722,000)
TOTAL EQUITY	4,638,867,000		4,450,178,000
TOTAL LIABILITIES AND EQUITY	12,976,510,000		13,024,253,000
Public Service Co Of Oklahoma [Member]
Current Assets
Cash and Cash Equivalents	1,022,000		1,413,000
Advances to Affiliates	107,459,000		39,876,000
Accounts Receivable:
Customers	30,220,000		39,977,000
Affiliated Companies	27,952,000		23,079,000
Miscellaneous	3,688,000		8,993,000
Allowance for Uncollectible Accounts	(1,179,000)		(777,000)
Total Accounts Receivable	60,681,000		71,272,000
Fuel	21,820,000		20,854,000
Materials and Supplies	51,701,000		50,347,000
Risk Management Assets	545,000		565,000
Deferred Income Tax Benefits	9,925,000		7,013,000
Accrued Tax Benefits	7,714,000		6,733,000
Regulatory Asset for Under-Recovered Fuel Costs	0		4,313,000
Prepayments and Other Current Assets	8,030,000		6,440,000
TOTAL CURRENT ASSETS	268,897,000		208,826,000
Property, Plant and Equipment
Generation	1,335,087,000		1,317,948,000
Transmission	702,696,000		692,644,000
Distribution	1,836,835,000		1,762,110,000
Other Property, Plant and Equipment	228,234,000		214,626,000
Construction Work in Progress	69,842,000		70,371,000
Total Property, Plant and Equipment	4,172,694,000		4,057,699,000
Accumulated Depreciation and Amortization	1,290,823,000		1,266,816,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	2,881,871,000		2,790,883,000
Other Noncurrent Assets
Regulatory Assets	241,984,000		266,545,000
Long-term Risk Management Assets	124,000		314,000
Deferred Charges and Other Noncurrent Assets	18,824,000		13,536,000
TOTAL OTHER NONCURRENT ASSETS	260,932,000		280,395,000
TOTAL ASSETS	3,411,700,000		3,280,104,000
Current Liabilities
Accounts Payable	83,313,000		76,607,000
Affiliated Companies	22,996,000		45,029,000
Short-term Debt:
Long-term Debt Due Within One Year	761,000		311,000
Risk Management Liabilities	5,071,000		1,280,000
Customer Deposits	46,577,000		47,493,000
Accrued Taxes	59,612,000		21,660,000
Accrued Interest	15,350,000		12,637,000
Regulatory Liability for Over-Recovered Fuel Costs	35,927,000		0
Other Current Liabilities	39,434,000		43,586,000
TOTAL CURRENT LIABILITIES	309,041,000		248,603,000
Noncurrent Liabilities
Long-term Debt	949,123,000		947,053,000
Long-term Risk Management Liabilities	1,051,000		1,330,000
Deferred Income Taxes	754,313,000		726,463,000
Regulatory Liabilities and Deferred Investment Tax Credits	343,276,000		334,812,000
Employee Benefits and Pension Obligations	74,551,000		84,548,000
Deferred Credits and Other Noncurrent Liabilities	42,043,000		44,490,000
TOTAL NONCURRENT LIABILITIES	2,164,357,000		2,138,696,000
TOTAL LIABILITIES	2,473,398,000		2,387,299,000
Rate Matters
Commitments and Contingencies
Equity
Common Stock	157,230,000		157,230,000
Paid-in Capital	364,037,000		364,037,000
Retained Earnings	410,351,000		364,389,000
Accumulated Other Comprehensive Income (Loss)	6,684,000		7,149,000
TOTAL EQUITY	938,302,000		892,805,000
TOTAL LIABILITIES AND EQUITY	3,411,700,000		3,280,104,000
Southwestern Electric Power Co [Member]
Current Assets
Cash and Cash Equivalents	16,626,000		801,000
Advances to Affiliates	128,227,000		0
Accounts Receivable:
Customers	37,366,000		35,054,000
Affiliated Companies	18,607,000		23,730,000
Miscellaneous	37,973,000		19,370,000
Allowance for Uncollectible Accounts	(1,685,000)		(989,000)
Total Accounts Receivable	92,261,000		77,165,000
Fuel	112,278,000		102,015,000
Materials and Supplies	72,973,000		55,325,000
Risk Management Assets	705,000		445,000
Deferred Income Tax Benefits	6,664,000		8,195,000
Accrued Tax Benefits	38,376,000		1,541,000
Regulatory Asset for Under-Recovered Fuel Costs	8,382,000		10,843,000
Prepayments and Other Current Assets	23,657,000		16,827,000
TOTAL CURRENT ASSETS	500,149,000		273,157,000
Property, Plant and Equipment
Generation	2,337,734,000		2,326,102,000
Transmission	1,102,142,000		988,534,000
Distribution	1,744,173,000		1,675,764,000
Other Property, Plant and Equipment	675,694,000		637,019,000
Construction Work in Progress	1,583,826,000		1,443,569,000
Total Property, Plant and Equipment	7,443,569,000		7,070,988,000
Accumulated Depreciation and Amortization	2,282,762,000		2,211,912,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	5,160,807,000		4,859,076,000
Other Noncurrent Assets
Regulatory Assets	430,013,000		394,276,000
Long-term Risk Management Assets	178,000		282,000
Deferred Charges and Other Noncurrent Assets	89,080,000		74,992,000
TOTAL OTHER NONCURRENT ASSETS	519,271,000		469,550,000
TOTAL ASSETS	6,180,227,000		5,601,783,000
Current Liabilities
Advances from Affiliates	0		132,473,000
Accounts Payable	149,583,000		181,268,000
Affiliated Companies	40,076,000		59,201,000
Short-term Debt:
Other Short-term Debt	0		17,016,000
Long-term Debt Due Within One Year	3,250,000		20,000,000
Risk Management Liabilities	4,148,000		24,359,000
Customer Deposits	53,187,000		52,095,000
Accrued Taxes	53,188,000		44,404,000
Accrued Interest	19,182,000		39,629,000
Obligations Under Capital Leases	17,426,000		15,058,000
Regulatory Liability for Over-Recovered Fuel Costs	13,000,000		5,032,000
Other Current Liabilities	65,615,000		64,413,000
TOTAL CURRENT LIABILITIES	418,655,000		654,948,000
Noncurrent Liabilities
Long-term Debt	2,042,889,000		1,708,637,000
Long-term Risk Management Liabilities	134,000		221,000
Deferred Income Taxes	926,183,000		665,668,000
Regulatory Liabilities and Deferred Investment Tax Credits	469,652,000		428,571,000
Asset Retirement Obligations	80,359,000		65,673,000
Employee Benefits and Pension Obligations	81,257,000		87,159,000
Obligations Under Capital Leases	116,750,000		112,802,000
Deferred Credits and Other Noncurrent Liabilities	53,435,000		64,347,000
TOTAL NONCURRENT LIABILITIES	3,770,659,000		3,133,078,000
TOTAL LIABILITIES	4,189,314,000		3,788,026,000
Rate Matters
Commitments and Contingencies
Equity
Common Stock	135,660,000		135,660,000
Paid-in Capital	674,606,000		674,606,000
Retained Earnings	1,207,331,000		1,029,915,000
Accumulated Other Comprehensive Income (Loss)	(26,998,000)		(26,815,000)
TOTAL COMMON SHAREHOLDER'S EQUITY	1,990,599,000		1,813,366,000
Noncontrolling Interests	314,000		391,000
TOTAL EQUITY	1,990,913,000		1,813,757,000
TOTAL LIABILITIES AND EQUITY	$ 6,180,227,000		$ 5,601,783,000

[1] Amount of securitized debt for receivables as accounted for under the ''Transfers and Servicing'' accounting guidance.