Condensed Consolidated Balance Sheets (USD $)	Jun. 30, 2013		Dec. 31, 2012
Current Assets
Cash and Cash Equivalents	$ 117,000,000		$ 279,000,000
Other Temporary Investments	298,000,000		324,000,000
Accounts Receivable:
Customers	725,000,000		685,000,000
Accrued Unbilled Revenues	95,000,000		195,000,000
Pledged Accounts Receivable - AEP Credit	975,000,000		856,000,000
Miscellaneous	174,000,000		171,000,000
Allowance for Uncollectible Accounts	(38,000,000)		(36,000,000)
Total Accounts Receivable	1,931,000,000		1,871,000,000
Fuel	879,000,000		844,000,000
Materials and Supplies	695,000,000		675,000,000
Risk Management Assets	187,000,000		191,000,000
Regulatory Asset for Under-Recovered Fuel Costs	98,000,000		88,000,000
Margin Deposits	80,000,000		76,000,000
Prepayments and Other Current Assets	337,000,000		241,000,000
TOTAL CURRENT ASSETS	4,622,000,000		4,589,000,000
Property, Plant and Equipment
Generation	26,183,000,000		26,279,000,000
Transmission	10,081,000,000		9,846,000,000
Distribution	15,887,000,000		15,565,000,000
Other Property, Plant and Equipment	4,033,000,000		3,945,000,000
Construction Work in Progress	2,173,000,000		1,819,000,000
Total Property, Plant and Equipment	58,357,000,000		57,454,000,000
Accumulated Depreciation and Amortization	18,932,000,000		18,691,000,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	39,425,000,000		38,763,000,000
Other Noncurrent Assets
Regulatory Assets	5,139,000,000		5,106,000,000
Securitized Transition Assets	2,013,000,000		2,117,000,000
Spent Nuclear Fuel and Decommissioning Trusts	1,791,000,000		1,706,000,000
Goodwill	91,000,000		91,000,000
Long-term Risk Management Assets	317,000,000		368,000,000
Deferred Charges and Other Noncurrent Assets	1,581,000,000		1,627,000,000
TOTAL OTHER NONCURRENT ASSETS	10,932,000,000		11,015,000,000
TOTAL ASSETS	54,979,000,000		54,367,000,000
Current Liabilities
Accounts Payable	987,000,000		1,169,000,000
Short-term Debt:
Securitized Debt for Receivable - AEP Credit	688,000,000	[1]	657,000,000	[1]
Other Short-term Debt	850,000,000		324,000,000
Total Short-term Debt	1,538,000,000		981,000,000
Long-term Debt Due Within One Year	1,819,000,000		2,171,000,000
Risk Management Liabilities	111,000,000		155,000,000
Customer Deposits	297,000,000		316,000,000
Accrued Taxes	680,000,000		747,000,000
Accrued Interest	254,000,000		269,000,000
Regulatory Liability for Over-Recovered Fuel Costs	10,000,000		47,000,000
Other Current Liabilities	823,000,000		968,000,000
TOTAL CURRENT LIABILITIES	6,519,000,000		6,823,000,000
Noncurrent Liabilities
Long-term Debt	15,799,000,000		15,586,000,000
Long-term Risk Management Liabilities	181,000,000		214,000,000
Deferred Income Taxes	9,691,000,000		9,252,000,000
Regulatory Liabilities and Deferred Investment Tax Credits	3,585,000,000		3,544,000,000
Asset Retirement Obligations	1,734,000,000		1,696,000,000
Employee Benefits and Pension Obligations	1,044,000,000		1,075,000,000
Deferred Credits and Other Noncurrent Liabilities	889,000,000		940,000,000
TOTAL NONCURRENT LIABILITIES	32,923,000,000		32,307,000,000
TOTAL LIABILITIES	39,442,000,000		39,130,000,000
Rate Matters
Commitments and Contingencies
Equity
Common Stock	3,296,000,000		3,289,000,000
Paid-in Capital	6,084,000,000		6,049,000,000
Retained Earnings	6,470,000,000		6,236,000,000
Accumulated Other Comprehensive Income (Loss)	(313,000,000)		(337,000,000)
TOTAL COMMON SHAREHOLDER'S EQUITY	15,537,000,000		15,237,000,000
Noncontrolling Interests	0		0
TOTAL EQUITY	15,537,000,000		15,237,000,000
TOTAL LIABILITIES AND EQUITY	54,979,000,000		54,367,000,000
Appalachian Power Co [Member]
Current Assets
Cash and Cash Equivalents	2,735,000		3,576,000
Advances to Affiliates	23,303,000		23,024,000
Accounts Receivable:
Customers	145,730,000		158,380,000
Affiliated Companies	58,353,000		96,213,000
Accrued Unbilled Revenues	44,839,000		70,825,000
Miscellaneous	2,177,000		1,344,000
Allowance for Uncollectible Accounts	(2,656,000)		(6,087,000)
Total Accounts Receivable	248,443,000		320,675,000
Fuel	218,577,000		185,813,000
Materials and Supplies	108,522,000		105,208,000
Risk Management Assets	28,520,000		30,960,000
Accrued Tax Benefits	37,354,000		50,032,000
Regulatory Asset for Under-Recovered Fuel Costs	62,849,000		74,906,000
Prepayments and Other Current Assets	16,262,000		18,690,000
TOTAL CURRENT ASSETS	746,565,000		812,884,000
Property, Plant and Equipment
Generation	5,678,562,000		5,632,665,000
Transmission	2,053,457,000		2,042,144,000
Distribution	3,049,503,000		2,991,898,000
Other Property, Plant and Equipment	380,863,000		373,327,000
Construction Work in Progress	241,215,000		266,247,000
Total Property, Plant and Equipment	11,403,600,000		11,306,281,000
Accumulated Depreciation and Amortization	3,263,771,000		3,196,639,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	8,139,829,000		8,109,642,000
Other Noncurrent Assets
Regulatory Assets	1,364,541,000		1,435,704,000
Long-term Risk Management Assets	23,608,000		34,360,000
Deferred Charges and Other Noncurrent Assets	109,465,000		115,078,000
TOTAL OTHER NONCURRENT ASSETS	1,497,614,000		1,585,142,000
TOTAL ASSETS	10,384,008,000		10,507,668,000
Current Liabilities
Advances from Affiliates	87,783,000		173,965,000
Accounts Payable	150,500,000		195,203,000
Affiliated Companies	99,096,000		137,088,000
Short-term Debt:
Long-term Debt Due Within One Year	574,681,000		574,679,000
Risk Management Liabilities	13,397,000		16,698,000
Customer Deposits	65,999,000		67,339,000
Deferred Income Taxes	8,388,000		11,715,000
Accrued Taxes	80,347,000		74,967,000
Accrued Interest	51,207,000		51,442,000
Other Current Liabilities	97,782,000		110,657,000
TOTAL CURRENT LIABILITIES	1,229,180,000		1,413,753,000
Noncurrent Liabilities
Long-term Debt	3,128,078,000		3,127,763,000
Long-term Risk Management Liabilities	14,007,000		18,476,000
Deferred Income Taxes	1,968,214,000		1,928,683,000
Regulatory Liabilities and Deferred Investment Tax Credits	623,394,000		607,680,000
Employee Benefits and Pension Obligations	202,114,000		204,207,000
Deferred Credits and Other Noncurrent Liabilities	153,986,000		154,544,000
TOTAL NONCURRENT LIABILITIES	6,089,793,000		6,041,353,000
TOTAL LIABILITIES	7,318,973,000		7,455,106,000
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	1,258,660,000		1,248,250,000
Accumulated Other Comprehensive Income (Loss)	(27,835,000)		(29,898,000)
TOTAL EQUITY	3,065,035,000		3,052,562,000
TOTAL LIABILITIES AND EQUITY	10,384,008,000		10,507,668,000
Indiana Michigan Power Co [Member]
Current Assets
Cash and Cash Equivalents	1,014,000		1,562,000
Advances to Affiliates	273,117,000		116,977,000
Accounts Receivable:
Customers	79,501,000		61,776,000
Affiliated Companies	58,494,000		79,886,000
Accrued Unbilled Revenues	11,207,000		11,218,000
Miscellaneous	6,400,000		12,260,000
Allowance for Uncollectible Accounts	(67,000)		(229,000)
Total Accounts Receivable	155,535,000		164,911,000
Fuel	74,818,000		53,406,000
Materials and Supplies	191,195,000		195,147,000
Risk Management Assets	19,599,000		26,974,000
Deferred Cook Plant Fire Costs	0		80,000,000
Prepayments and Other Current Assets	71,782,000		83,270,000
TOTAL CURRENT ASSETS	787,060,000		722,247,000
Property, Plant and Equipment
Generation	4,130,327,000		4,062,733,000
Transmission	1,298,743,000		1,278,236,000
Distribution	1,580,709,000		1,553,358,000
Other Property, Plant and Equipment	752,084,000		725,313,000
Construction Work in Progress	370,384,000		341,063,000
Total Property, Plant and Equipment	8,132,247,000		7,960,703,000
Accumulated Depreciation and Amortization	3,269,566,000		3,232,135,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	4,862,681,000		4,728,568,000
Other Noncurrent Assets
Regulatory Assets	564,163,000		540,019,000
Spent Nuclear Fuel and Decommissioning Trusts	1,791,394,000		1,705,772,000
Long-term Risk Management Assets	16,315,000		23,569,000
Deferred Charges and Other Noncurrent Assets	117,327,000		111,364,000
TOTAL OTHER NONCURRENT ASSETS	2,489,199,000		2,380,724,000
TOTAL ASSETS	8,138,940,000		7,831,539,000
Current Liabilities
Accounts Payable	143,935,000		208,701,000
Affiliated Companies	59,793,000		104,631,000
Short-term Debt:
Long-term Debt Due Within One Year	228,748,000		203,953,000
Risk Management Liabilities	9,387,000		31,517,000
Customer Deposits	29,794,000		31,142,000
Accrued Taxes	66,786,000		67,675,000
Accrued Interest	28,745,000		26,859,000
Other Current Liabilities	102,011,000		122,053,000
TOTAL CURRENT LIABILITIES	669,199,000		796,531,000
Noncurrent Liabilities
Long-term Debt	2,076,444,000		1,853,713,000
Long-term Risk Management Liabilities	10,020,000		13,898,000
Deferred Income Taxes	1,090,509,000		1,019,160,000
Regulatory Liabilities and Deferred Investment Tax Credits	990,801,000		948,292,000
Asset Retirement Obligations	1,233,640,000		1,192,313,000
Deferred Credits and Other Noncurrent Liabilities	201,546,000		203,857,000
TOTAL NONCURRENT LIABILITIES	5,602,960,000		5,231,233,000
TOTAL LIABILITIES	6,272,159,000		6,027,764,000
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	854,389,000		795,178,000
Accumulated Other Comprehensive Income (Loss)	(25,088,000)		(28,883,000)
TOTAL EQUITY	1,866,781,000		1,803,775,000
TOTAL LIABILITIES AND EQUITY	8,138,940,000		7,831,539,000
Ohio Power Co [Member]
Current Assets
Cash and Cash Equivalents	2,545,000		3,640,000
Advances to Affiliates	10,321,000		116,422,000
Accounts Receivable:
Customers	115,913,000		135,954,000
Affiliated Companies	158,313,000		176,590,000
Accrued Unbilled Revenues	11,674,000		57,887,000
Miscellaneous	3,887,000		9,327,000
Allowance for Uncollectible Accounts	(7,418,000)		(129,000)
Total Accounts Receivable	282,369,000		379,629,000
Fuel	312,293,000		328,840,000
Materials and Supplies	186,662,000		186,269,000
Risk Management Assets	41,145,000		44,313,000
Accrued Tax Benefits	43,706,000		17,785,000
Prepayments and Other Current Assets	32,684,000		26,807,000
TOTAL CURRENT ASSETS	911,725,000		1,103,705,000
Property, Plant and Equipment
Generation	8,363,747,000		8,673,296,000
Transmission	2,011,693,000		2,013,737,000
Distribution	3,773,461,000		3,722,745,000
Other Property, Plant and Equipment	584,611,000		571,154,000
Construction Work in Progress	409,751,000		354,497,000
Total Property, Plant and Equipment	15,143,263,000		15,335,429,000
Accumulated Depreciation and Amortization	5,154,691,000		5,242,805,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	9,988,572,000		10,092,624,000
Other Noncurrent Assets
Regulatory Assets	1,527,609,000		1,420,966,000
Long-term Risk Management Assets	33,381,000		48,288,000
Deferred Charges and Other Noncurrent Assets	193,947,000		320,026,000
TOTAL OTHER NONCURRENT ASSETS	1,754,937,000		1,789,280,000
TOTAL ASSETS	12,655,234,000		12,985,609,000
Current Liabilities
Advances from Affiliates	292,051,000		0
Accounts Payable	228,348,000		276,220,000
Affiliated Companies	112,737,000		153,222,000
Short-term Debt:
Long-term Debt Due Within One Year	664,450,000		856,000,000
Risk Management Liabilities	19,769,000		24,155,000
Accrued Taxes	324,412,000		467,309,000
Accrued Interest	52,499,000		63,560,000
Other Current Liabilities	231,272,000		263,638,000
TOTAL CURRENT LIABILITIES	1,925,538,000		2,104,104,000
Noncurrent Liabilities
Long-term Debt	2,440,344,000		2,804,440,000
Long-term Debt - Affiliated	400,000,000		200,000,000
Long-term Risk Management Liabilities	19,803,000		25,965,000
Deferred Income Taxes	2,412,119,000		2,345,850,000
Regulatory Liabilities and Deferred Investment Tax Credits	444,931,000		451,071,000
Deferred Credits and Other Noncurrent Liabilities	503,900,000		528,470,000
TOTAL NONCURRENT LIABILITIES	6,221,097,000		6,355,796,000
TOTAL LIABILITIES	8,146,635,000		8,459,900,000
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	2,601,964,000		2,626,134,000
Accumulated Other Comprehensive Income (Loss)	(158,665,000)		(165,725,000)
TOTAL EQUITY	4,508,599,000		4,525,709,000
TOTAL LIABILITIES AND EQUITY	12,655,234,000		12,985,609,000
Public Service Co Of Oklahoma [Member]
Current Assets
Cash and Cash Equivalents	1,042,000		1,367,000
Advances to Affiliates	0		10,558,000
Accounts Receivable:
Customers	42,422,000		31,047,000
Affiliated Companies	21,844,000		24,751,000
Miscellaneous	2,336,000		6,216,000
Allowance for Uncollectible Accounts	(713,000)		(872,000)
Total Accounts Receivable	65,889,000		61,142,000
Fuel	22,459,000		22,085,000
Materials and Supplies	52,908,000		52,183,000
Risk Management Assets	484,000		509,000
Deferred Income Tax Benefits	2,459,000		7,183,000
Accrued Tax Benefits	21,358,000		11,812,000
Regulatory Asset for Under-Recovered Fuel Costs	9,986,000		0
Prepayments and Other Current Assets	4,880,000		7,633,000
TOTAL CURRENT ASSETS	181,465,000		174,472,000
Property, Plant and Equipment
Generation	1,374,411,000		1,346,530,000
Transmission	723,331,000		706,917,000
Distribution	1,909,976,000		1,859,557,000
Other Property, Plant and Equipment	215,260,000		210,549,000
Construction Work in Progress	101,119,000		95,170,000
Total Property, Plant and Equipment	4,324,097,000		4,218,723,000
Accumulated Depreciation and Amortization	1,309,699,000		1,278,941,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	3,014,398,000		2,939,782,000
Other Noncurrent Assets
Regulatory Assets	181,392,000		202,328,000
Long-term Risk Management Assets	0		31,000
Deferred Charges and Other Noncurrent Assets	27,927,000		8,560,000
TOTAL OTHER NONCURRENT ASSETS	209,319,000		210,919,000
TOTAL ASSETS	3,405,182,000		3,325,173,000
Current Liabilities
Advances from Affiliates	25,276,000		0
Accounts Payable	96,206,000		87,050,000
Affiliated Companies	49,320,000		36,189,000
Short-term Debt:
Long-term Debt Due Within One Year	34,108,000		764,000
Risk Management Liabilities	2,111,000		5,848,000
Customer Deposits	46,223,000		46,533,000
Accrued Taxes	42,173,000		28,024,000
Accrued Interest	12,318,000		12,654,000
Regulatory Liability for Over-Recovered Fuel Costs	0		7,945,000
Other Current Liabilities	50,139,000		50,684,000
TOTAL CURRENT LIABILITIES	357,874,000		275,691,000
Noncurrent Liabilities
Long-term Debt	915,733,000		949,107,000
Long-term Risk Management Liabilities	2,000		31,000
Deferred Income Taxes	798,812,000		740,676,000
Regulatory Liabilities and Deferred Investment Tax Credits	329,359,000		344,817,000
Employee Benefits and Pension Obligations	34,853,000		34,906,000
Deferred Credits and Other Noncurrent Liabilities	38,067,000		63,667,000
TOTAL NONCURRENT LIABILITIES	2,116,826,000		2,133,204,000
TOTAL LIABILITIES	2,474,700,000		2,408,895,000
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	403,155,000		388,530,000
Accumulated Other Comprehensive Income (Loss)	6,060,000		6,481,000
TOTAL EQUITY	930,482,000		916,278,000
TOTAL LIABILITIES AND EQUITY	3,405,182,000		3,325,173,000
Southwestern Electric Power Co [Member]
Current Assets
Cash and Cash Equivalents	11,840,000		2,036,000
Advances to Affiliates	14,806,000		153,829,000
Accounts Receivable:
Customers	42,443,000		39,349,000
Affiliated Companies	30,602,000		26,288,000
Miscellaneous	20,958,000		35,514,000
Allowance for Uncollectible Accounts	(2,045,000)		(2,041,000)
Total Accounts Receivable	91,958,000		99,110,000
Fuel	137,238,000		134,234,000
Materials and Supplies	72,660,000		69,212,000
Risk Management Assets	398,000		695,000
Deferred Income Tax Benefits	104,894,000		101,403,000
Accrued Tax Benefits	30,801,000		9,616,000
Regulatory Asset for Under-Recovered Fuel Costs	14,210,000		8,527,000
Prepayments and Other Current Assets	12,795,000		16,489,000
TOTAL CURRENT ASSETS	491,600,000		595,151,000
Property, Plant and Equipment
Generation	3,919,327,000		3,888,230,000
Transmission	1,140,451,000		1,115,795,000
Distribution	1,794,684,000		1,758,988,000
Other Property, Plant and Equipment	695,944,000		688,254,000
Construction Work in Progress	153,715,000		99,783,000
Total Property, Plant and Equipment	7,704,121,000		7,551,050,000
Accumulated Depreciation and Amortization	2,353,562,000		2,284,258,000
TOTAL PROPERTY, PLANT AND EQUIPMENT - NET	5,350,559,000		5,266,792,000
Other Noncurrent Assets
Regulatory Assets	407,408,000		403,278,000
Deferred Charges and Other Noncurrent Assets	100,880,000		76,432,000
TOTAL OTHER NONCURRENT ASSETS	508,288,000		479,710,000
TOTAL ASSETS	6,350,447,000		6,341,653,000
Current Liabilities
Accounts Payable	107,438,000		126,768,000
Affiliated Companies	64,553,000		62,835,000
Short-term Debt:
Other Short-term Debt	0		2,603,000
Long-term Debt Due Within One Year	3,250,000		3,250,000
Risk Management Liabilities	941,000		1,128,000
Customer Deposits	55,658,000		69,393,000
Accrued Taxes	63,796,000		31,532,000
Accrued Interest	43,335,000		43,950,000
Obligations Under Capital Leases	17,978,000		17,599,000
Regulatory Liability for Over-Recovered Fuel Costs	5,102,000		16,761,000
Other Current Liabilities	66,388,000		64,997,000
TOTAL CURRENT LIABILITIES	428,439,000		440,816,000
Noncurrent Liabilities
Long-term Debt	2,041,530,000		2,042,978,000
Long-term Risk Management Liabilities	3,000		0
Deferred Income Taxes	1,122,609,000		1,075,551,000
Regulatory Liabilities and Deferred Investment Tax Credits	472,434,000		476,471,000
Asset Retirement Obligations	86,998,000		78,017,000
Employee Benefits and Pension Obligations	41,795,000		38,240,000
Obligations Under Capital Leases	107,728,000		114,161,000
Deferred Credits and Other Noncurrent Liabilities	49,244,000		53,946,000
TOTAL NONCURRENT LIABILITIES	3,922,341,000		3,879,364,000
TOTAL LIABILITIES	4,350,780,000		4,320,180,000
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	1,205,935,000		1,228,806,000
Accumulated Other Comprehensive Income (Loss)	(16,901,000)		(17,860,000)
TOTAL COMMON SHAREHOLDER'S EQUITY	1,999,300,000		2,021,212,000
Noncontrolling Interests	367,000		261,000
TOTAL EQUITY	1,999,667,000		2,021,473,000
TOTAL LIABILITIES AND EQUITY	$ 6,350,447,000		$ 6,341,653,000

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