Condensed Consolidated Balance Sheets (USD $)	Jun. 30, 2012		Dec. 31, 2011
Current Assets
Cash and Cash Equivalents	$ 297,000,000		$ 221,000,000
Other Temporary Investments	297,000,000		294,000,000
Accounts Receivable:
Customers	674,000,000		690,000,000
Accrued Unbilled Revenues	129,000,000		106,000,000
Pledged Accounts Receivable - AEP Credit	910,000,000		920,000,000
Miscellaneous	84,000,000		150,000,000
Allowance for Uncollectible Accounts	(35,000,000)		(32,000,000)
Total Accounts Receivable	1,762,000,000		1,834,000,000
Fuel	837,000,000		657,000,000
Materials and Supplies	657,000,000		635,000,000
Risk Management Assets	219,000,000		193,000,000
Accrued Tax Benefits	46,000,000		51,000,000
Regulatory Asset for Under-Recovered Fuel Costs	126,000,000		65,000,000
Margin Deposits	63,000,000		67,000,000
Prepayments and Other Current Assets	179,000,000		165,000,000
TOTAL CURRENT ASSETS	4,483,000,000		4,182,000,000
Property, Plant and Equipment
Generation	25,382,000,000		24,938,000,000
Transmission	9,372,000,000		9,048,000,000
Distribution	15,148,000,000		14,783,000,000
Other Property, Plant and Equipment	3,862,000,000		3,780,000,000
Construction Work in Progress	3,020,000,000		3,121,000,000
Total Property, Plant and Equipment	56,784,000,000		55,670,000,000
Accumulated Depreciation and Amortization	18,956,000,000		18,699,000,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	37,828,000,000		36,971,000,000
Other Noncurrent Assets
Regulatory Assets	5,277,000,000		6,026,000,000
Securitized Transition Assets	2,241,000,000		1,627,000,000
Spent Nuclear Fuel and Decommissioning Trusts	1,658,000,000		1,592,000,000
Goodwill	90,000,000		76,000,000
Long-term Risk Management Assets	439,000,000		403,000,000
Deferred Charges and Other Noncurrent Assets	1,405,000,000		1,346,000,000
TOTAL OTHER NONCURRENT ASSETS	11,110,000,000		11,070,000,000
TOTAL ASSETS	53,421,000,000		52,223,000,000
Current Liabilities
Accounts Payable	906,000,000		1,095,000,000
Short-term Debt:
Securitized Debt for Receivables - AEP Credit	658,000,000	[1]	666,000,000	[1]
Other Short-term Debt	550,000,000		984,000,000
Total Short-term Debt	1,208,000,000		1,650,000,000
Long-term Debt Due Within One Year	1,983,000,000		1,433,000,000
Risk Management Liabilities	165,000,000		150,000,000
Customer Deposits	293,000,000		289,000,000
Accrued Taxes	617,000,000		717,000,000
Accrued Interest	281,000,000		279,000,000
Regulatory Liability for Over-Recovered Fuel Costs	84,000,000		8,000,000
Other Current Liabilities	870,000,000		990,000,000
TOTAL CURRENT LIABILITIES	6,407,000,000		6,611,000,000
Noncurrent Liabilities
Long-term Debt	15,319,000,000		15,083,000,000
Long-term Risk Management Liabilities	259,000,000		195,000,000
Deferred Income Taxes	8,627,000,000		8,227,000,000
Regulatory Liabilities and Deferred Investment Tax Credits	3,615,000,000		3,195,000,000
Asset Retirement Obligations	1,523,000,000		1,472,000,000
Employee Benefits and Pension Obligations	1,729,000,000		1,801,000,000
Deferred Credits and Other Noncurrent Liabilities	934,000,000		974,000,000
TOTAL NONCURRENT LIABILITIES	32,006,000,000		30,947,000,000
TOTAL LIABILITIES	38,413,000,000		37,558,000,000
Rate Matters
Commitments and Contingencies
Equity
Common Stock	3,284,000,000		3,274,000,000
Paid-in Capital	6,013,000,000		5,970,000,000
Retained Earnings	6,185,000,000		5,890,000,000
Accumulated Other Comprehensive Income (Loss)	(475,000,000)		(470,000,000)
TOTAL COMMON SHAREHOLDER'S EQUITY	15,007,000,000		14,664,000,000
Noncontrolling Interests	1,000,000		1,000,000
TOTAL EQUITY	15,008,000,000		14,665,000,000
TOTAL LIABILITIES AND EQUITY	53,421,000,000		52,223,000,000
Appalachian Power Co [Member]
Current Assets
Cash and Cash Equivalents	2,109,000		2,317,000
Advances to Affiliates	22,573,000		22,008,000
Accounts Receivable:
Customers	145,133,000		158,382,000
Affiliated Companies	70,561,000		136,194,000
Accrued Unbilled Revenues	47,419,000		68,427,000
Miscellaneous	456,000		5,505,000
Allowance for Uncollectible Accounts	(4,413,000)		(5,289,000)
Total Accounts Receivable	259,156,000		363,219,000
Fuel	197,342,000		143,931,000
Materials and Supplies	103,267,000		101,724,000
Risk Management Assets	41,841,000		39,645,000
Accrued Tax Benefits	320,000		7,715,000
Regulatory Asset for Under-Recovered Fuel Costs	102,091,000		41,105,000
Prepayments and Other Current Assets	18,857,000		21,745,000
TOTAL CURRENT ASSETS	747,556,000		743,409,000
Property, Plant and Equipment
Generation	5,563,066,000		5,194,967,000
Transmission	2,007,141,000		1,943,969,000
Distribution	2,901,775,000		2,845,405,000
Other Property, Plant and Equipment	373,255,000		357,326,000
Construction Work in Progress	217,902,000		565,841,000
Total Property, Plant and Equipment	11,063,139,000		10,907,508,000
Accumulated Depreciation and Amortization	3,087,299,000		2,994,016,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	7,975,840,000		7,913,492,000
Other Noncurrent Assets
Regulatory Assets	1,404,116,000		1,481,193,000
Long-term Risk Management Assets	44,676,000		39,226,000
Deferred Charges and Other Noncurrent Assets	110,514,000		122,187,000
TOTAL OTHER NONCURRENT ASSETS	1,559,306,000		1,642,606,000
TOTAL ASSETS	10,282,702,000		10,299,507,000
Current Liabilities
Advances from Affiliates	166,988,000		198,248,000
Accounts Payable	139,851,000		186,612,000
Affiliated Companies	107,129,000		137,376,000
Short-term Debt:
Long-term Debt Due Within One Year	545,027,000		594,525,000
Risk Management Liabilities	23,036,000		26,606,000
Customer Deposits	60,971,000		61,690,000
Deferred Income Taxes	38,857,000		14,255,000
Accrued Taxes	85,479,000		63,422,000
Accrued Interest	56,561,000		57,230,000
Other Current Liabilities	88,886,000		105,646,000
TOTAL CURRENT LIABILITIES	1,312,785,000		1,445,610,000
Noncurrent Liabilities
Long-term Debt	3,132,089,000		3,131,726,000
Long-term Risk Management Liabilities	22,638,000		12,923,000
Deferred Income Taxes	1,766,932,000		1,736,180,000
Regulatory Liabilities and Deferred Investment Tax Credits	620,058,000		576,792,000
Employee Benefits and Pension Obligations	296,168,000		302,182,000
Deferred Credits and Other Noncurrent Liabilities	156,149,000		157,680,000
TOTAL NONCURRENT LIABILITIES	5,994,034,000		5,917,483,000
TOTAL LIABILITIES	7,306,819,000		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	1,198,390,000		1,160,747,000
Accumulated Other Comprehensive Income (Loss)	(56,717,000)		(58,543,000)
TOTAL EQUITY	2,975,883,000		2,936,414,000
TOTAL LIABILITIES AND EQUITY	10,282,702,000		10,299,507,000
Indiana Michigan Power Co [Member]
Current Assets
Cash and Cash Equivalents	898,000		1,020,000
Advances to Affiliates	238,466,000		95,714,000
Accounts Receivable:
Customers	67,410,000		72,461,000
Affiliated Companies	69,138,000		90,980,000
Accrued Unbilled Revenues	19,088,000		14,780,000
Miscellaneous	13,631,000		22,685,000
Allowance for Uncollectible Accounts	(1,725,000)		(1,750,000)
Total Accounts Receivable	167,542,000		199,156,000
Fuel	68,321,000		52,979,000
Materials and Supplies	170,538,000		175,924,000
Risk Management Assets	39,058,000		32,152,000
Accrued Tax Benefits	16,769,000		38,425,000
Deferred Cook Plant Fire Costs	64,435,000		63,809,000
Prepayments and Other Current Assets	41,256,000		35,395,000
TOTAL CURRENT ASSETS	807,283,000		694,574,000
Property, Plant and Equipment
Generation	3,932,503,000		3,932,472,000
Transmission	1,261,018,000		1,224,786,000
Distribution	1,506,629,000		1,481,608,000
Other Property, Plant and Equipment	667,272,000		709,558,000
Construction Work in Progress	254,149,000		236,096,000
Total Property, Plant and Equipment	7,621,571,000		7,584,520,000
Accumulated Depreciation and Amortization	3,196,749,000		3,179,920,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	4,424,822,000		4,404,600,000
Other Noncurrent Assets
Regulatory Assets	599,542,000		602,979,000
Spent Nuclear Fuel and Decommissioning Trusts	1,657,502,000		1,591,732,000
Long-term Risk Management Assets	31,408,000		29,362,000
Deferred Charges and Other Noncurrent Assets	64,510,000		69,309,000
TOTAL OTHER NONCURRENT ASSETS	2,352,962,000		2,293,382,000
TOTAL ASSETS	7,585,067,000		7,392,556,000
Current Liabilities
Accounts Payable	78,758,000		113,063,000
Affiliated Companies	65,145,000		81,102,000
Short-term Debt:
Long-term Debt Due Within One Year	303,240,000		279,075,000
Risk Management Liabilities	34,239,000		16,980,000
Customer Deposits	30,543,000		30,696,000
Accrued Taxes	63,380,000		65,233,000
Accrued Interest	27,839,000		27,798,000
Other Current Liabilities	85,437,000		117,879,000
TOTAL CURRENT LIABILITIES	688,581,000		731,826,000
Noncurrent Liabilities
Long-term Debt	1,828,261,000		1,778,600,000
Long-term Risk Management Liabilities	15,908,000		18,871,000
Deferred Income Taxes	968,806,000		925,712,000
Regulatory Liabilities and Deferred Investment Tax Credits	955,482,000		875,202,000
Asset Retirement Obligations	1,039,442,000		1,013,122,000
Deferred Credits and Other Noncurrent Liabilities	287,996,000		288,243,000
TOTAL NONCURRENT LIABILITIES	5,095,895,000		4,899,750,000
TOTAL LIABILITIES	5,784,476,000		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	795,752,000		751,721,000
Accumulated Other Comprehensive Income (Loss)	(32,641,000)		(28,221,000)
TOTAL EQUITY	1,800,591,000		1,760,980,000
TOTAL LIABILITIES AND EQUITY	7,585,067,000		7,392,556,000
Ohio Power Co [Member]
Current Assets
Cash and Cash Equivalents	2,366,000		2,095,000
Advances to Affiliates	32,671,000		219,458,000
Accounts Receivable:
Customers	116,264,000		146,432,000
Affiliated Companies	146,434,000		162,830,000
Accrued Unbilled Revenues	13,865,000		19,012,000
Miscellaneous	5,030,000		16,994,000
Allowance for Uncollectible Accounts	(3,712,000)		(3,563,000)
Total Accounts Receivable	277,881,000		341,705,000
Fuel	344,642,000		262,886,000
Materials and Supplies	191,005,000		201,325,000
Risk Management Assets	62,962,000		54,293,000
Accrued Tax Benefits	6,643,000		11,975,000
Prepayments and Other Current Assets	29,430,000		41,560,000
TOTAL CURRENT ASSETS	947,600,000		1,135,297,000
Property, Plant and Equipment
Generation	9,552,733,000		9,502,614,000
Transmission	1,971,788,000		1,948,329,000
Distribution	3,631,335,000		3,545,574,000
Other Property, Plant and Equipment	568,702,000		546,642,000
Construction Work in Progress	346,531,000		354,465,000
Total Property, Plant and Equipment	16,071,089,000		15,897,624,000
Accumulated Depreciation and Amortization	5,764,534,000		5,742,561,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	10,306,555,000		10,155,063,000
Other Noncurrent Assets
Regulatory Assets	1,405,104,000		1,370,504,000
Long-term Risk Management Assets	66,290,000		53,614,000
Deferred Charges and Other Noncurrent Assets	193,784,000		309,775,000
TOTAL OTHER NONCURRENT ASSETS	1,665,178,000		1,733,893,000
TOTAL ASSETS	12,919,333,000		13,024,253,000
Current Liabilities
Accounts Payable	224,892,000		293,730,000
Affiliated Companies	97,248,000		183,898,000
Short-term Debt:
Long-term Debt Due Within One Year	606,000,000		244,500,000
Risk Management Liabilities	35,141,000		36,561,000
Accrued Taxes	327,397,000		450,570,000
Accrued Interest	65,405,000		66,441,000
Other Current Liabilities	240,361,000		238,275,000
TOTAL CURRENT LIABILITIES	1,596,444,000		1,513,975,000
Noncurrent Liabilities
Long-term Debt	3,054,044,000		3,609,648,000
Long-term Debt - Affiliated	200,000,000		200,000,000
Long-term Risk Management Liabilities	33,753,000		17,890,000
Deferred Income Taxes	2,323,655,000		2,245,380,000
Regulatory Liabilities and Deferred Investment Tax Credits	507,454,000		301,124,000
Employee Benefits and Pension Obligations	318,506,000		335,029,000
Deferred Credits and Other Noncurrent Liabilities	328,136,000		351,029,000
TOTAL NONCURRENT LIABILITIES	6,765,548,000		7,060,100,000
TOTAL LIABILITIES	8,361,992,000		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	2,684,853,000		2,582,600,000
Accumulated Other Comprehensive Income (Loss)	(192,812,000)		(197,722,000)
TOTAL EQUITY	4,557,341,000		4,450,178,000
TOTAL LIABILITIES AND EQUITY	12,919,333,000		13,024,253,000
Public Service Co Of Oklahoma [Member]
Current Assets
Cash and Cash Equivalents	1,233,000		1,413,000
Advances to Affiliates	120,424,000		39,876,000
Accounts Receivable:
Customers	39,426,000		39,977,000
Affiliated Companies	22,922,000		23,079,000
Miscellaneous	7,408,000		8,993,000
Allowance for Uncollectible Accounts	(951,000)		(777,000)
Total Accounts Receivable	68,805,000		71,272,000
Fuel	18,311,000		20,854,000
Materials and Supplies	50,409,000		50,347,000
Risk Management Assets	592,000		565,000
Deferred Income Tax Benefits	10,439,000		7,013,000
Accrued Tax Benefits	5,508,000		6,733,000
Regulatory Asset for Under-Recovered Fuel Costs	0		4,313,000
Prepayments and Other Current Assets	5,248,000		6,440,000
TOTAL CURRENT ASSETS	280,969,000		208,826,000
Property, Plant and Equipment
Generation	1,326,618,000		1,317,948,000
Transmission	701,121,000		692,644,000
Distribution	1,812,061,000		1,762,110,000
Other Property, Plant and Equipment	222,958,000		214,626,000
Construction Work in Progress	59,916,000		70,371,000
Total Property, Plant and Equipment	4,122,674,000		4,057,699,000
Accumulated Depreciation and Amortization	1,266,744,000		1,266,816,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	2,855,930,000		2,790,883,000
Other Noncurrent Assets
Regulatory Assets	254,017,000		266,545,000
Long-term Risk Management Assets	131,000		314,000
Deferred Charges and Other Noncurrent Assets	32,220,000		13,536,000
TOTAL OTHER NONCURRENT ASSETS	286,368,000		280,395,000
TOTAL ASSETS	3,423,267,000		3,280,104,000
Current Liabilities
Accounts Payable	71,070,000		76,607,000
Affiliated Companies	49,294,000		45,029,000
Short-term Debt:
Long-term Debt Due Within One Year	758,000		311,000
Risk Management Liabilities	4,651,000		1,280,000
Customer Deposits	46,818,000		47,493,000
Accrued Taxes	53,566,000		21,660,000
Accrued Interest	12,285,000		12,637,000
Regulatory Liability for Over-Recovered Fuel Costs	71,785,000		0
Other Current Liabilities	41,277,000		43,586,000
TOTAL CURRENT LIABILITIES	351,504,000		248,603,000
Noncurrent Liabilities
Long-term Debt	949,139,000		947,053,000
Long-term Risk Management Liabilities	2,490,000		1,330,000
Deferred Income Taxes	740,600,000		726,463,000
Regulatory Liabilities and Deferred Investment Tax Credits	343,762,000		334,812,000
Employee Benefits and Pension Obligations	82,625,000		84,548,000
Deferred Credits and Other Noncurrent Liabilities	42,895,000		44,490,000
TOTAL NONCURRENT LIABILITIES	2,161,511,000		2,138,696,000
TOTAL LIABILITIES	2,513,015,000		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	382,248,000		364,389,000
Accumulated Other Comprehensive Income (Loss)	6,737,000		7,149,000
TOTAL EQUITY	910,252,000		892,805,000
TOTAL LIABILITIES AND EQUITY	3,423,267,000		3,280,104,000
Southwestern Electric Power Co [Member]
Current Assets
Cash and Cash Equivalents	14,617,000		801,000
Advances to Affiliates	97,022,000		0
Accounts Receivable:
Customers	39,210,000		35,054,000
Affiliated Companies	29,043,000		23,730,000
Miscellaneous	22,886,000		19,370,000
Allowance for Uncollectible Accounts	(960,000)		(989,000)
Total Accounts Receivable	90,179,000		77,165,000
Fuel	104,499,000		102,015,000
Materials and Supplies	69,742,000		55,325,000
Risk Management Assets	1,297,000		445,000
Deferred Income Tax Benefits	7,286,000		8,195,000
Accrued Tax Benefits	52,285,000		1,541,000
Regulatory Asset for Under-Recovered Fuel Costs	12,835,000		10,843,000
Prepayments and Other Current Assets	25,930,000		16,827,000
TOTAL CURRENT ASSETS	475,692,000		273,157,000
Property, Plant and Equipment
Generation	2,332,494,000		2,326,102,000
Transmission	1,053,582,000		988,534,000
Distribution	1,721,839,000		1,675,764,000
Other Property, Plant and Equipment	660,819,000		637,019,000
Construction Work in Progress	1,520,783,000		1,443,569,000
Total Property, Plant and Equipment	7,289,517,000		7,070,988,000
Accumulated Depreciation and Amortization	2,249,214,000		2,211,912,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	5,040,303,000		4,859,076,000
Other Noncurrent Assets
Regulatory Assets	423,048,000		394,276,000
Long-term Risk Management Assets	368,000		282,000
Deferred Charges and Other Noncurrent Assets	98,986,000		74,992,000
TOTAL OTHER NONCURRENT ASSETS	522,402,000		469,550,000
TOTAL ASSETS	6,038,397,000		5,601,783,000
Current Liabilities
Advances from Affiliates	0		132,473,000
Accounts Payable	155,153,000		181,268,000
Affiliated Companies	58,582,000		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	8,009,000		24,359,000
Customer Deposits	53,552,000		52,095,000
Accrued Taxes	54,527,000		44,404,000
Accrued Interest	43,685,000		39,629,000
Obligations Under Capital Leases	16,695,000		15,058,000
Regulatory Liability for Over-Recovered Fuel Costs	2,626,000		5,032,000
Other Current Liabilities	67,227,000		64,413,000
TOTAL CURRENT LIABILITIES	463,306,000		654,948,000
Noncurrent Liabilities
Long-term Debt	2,044,426,000		1,708,637,000
Long-term Risk Management Liabilities	335,000		221,000
Deferred Income Taxes	828,904,000		665,668,000
Regulatory Liabilities and Deferred Investment Tax Credits	459,529,000		428,571,000
Asset Retirement Obligations	80,851,000		65,673,000
Employee Benefits and Pension Obligations	91,985,000		87,159,000
Obligations Under Capital Leases	115,535,000		112,802,000
Deferred Credits and Other Noncurrent Liabilities	51,714,000		64,347,000
TOTAL NONCURRENT LIABILITIES	3,673,279,000		3,133,078,000
TOTAL LIABILITIES	4,136,585,000		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	1,119,068,000		1,029,915,000
Accumulated Other Comprehensive Income (Loss)	(27,862,000)		(26,815,000)
TOTAL COMMON SHAREHOLDER'S EQUITY	1,901,472,000		1,813,366,000
Noncontrolling Interests	340,000		391,000
TOTAL EQUITY	1,901,812,000		1,813,757,000
TOTAL LIABILITIES AND EQUITY	$ 6,038,397,000		$ 5,601,783,000

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