Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues
Utility Operations	$ 3,797,000,000	$ 3,814,000,000	$ 10,539,000,000	$ 10,412,000,000
Other Revenues	379,000,000	342,000,000	1,045,000,000	920,000,000
TOTAL REVENUES	4,176,000,000	4,156,000,000	11,584,000,000	11,332,000,000
Expenses
Fuel and Other Consumables Used for Electric Generation	1,168,000,000	1,180,000,000	3,107,000,000	3,137,000,000
Purchased Electricity for Resale	373,000,000	327,000,000	1,103,000,000	855,000,000
Other Operation	677,000,000	775,000,000	2,079,000,000	2,150,000,000
Maintenance	261,000,000	255,000,000	839,000,000	769,000,000
Asset Impairments and Other Related Charges	144,000,000	13,000,000	298,000,000	13,000,000
Depreciation and Amortization	447,000,000	470,000,000	1,310,000,000	1,353,000,000
Taxes Other Than Income Taxes	231,000,000	224,000,000	671,000,000	648,000,000
TOTAL EXPENSES	3,301,000,000	3,244,000,000	9,407,000,000	8,925,000,000
OPERATING INCOME (LOSS)	875,000,000	912,000,000	2,177,000,000	2,407,000,000
Other Income (Expense):
Interest and Investment Income	3,000,000	2,000,000	55,000,000	6,000,000
Carrying Costs Income	8,000,000	11,000,000	20,000,000	42,000,000
Allowance for Equity Funds Used During Construction	19,000,000	23,000,000	51,000,000	70,000,000
Interest Expense	(225,000,000)	(233,000,000)	(685,000,000)	(697,000,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	680,000,000	715,000,000	1,618,000,000	1,828,000,000
Income Tax Expense (Credit)	257,000,000	241,000,000	520,000,000	620,000,000
Equity Earnings (Loss) of Unconsolidated Subsidiaries	11,000,000	14,000,000	39,000,000	33,000,000
NET INCOME (LOSS)	434,000,000	488,000,000	1,137,000,000	1,241,000,000
Net Income Attributable to Noncontrolling Interests	1,000,000	1,000,000	3,000,000	3,000,000
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS	433,000,000	487,000,000	1,134,000,000	1,238,000,000
Earnings Per Share
WEIGHTED AVERAGE NUMBER OF BASIC AEP COMMON SHARES OUTSTANDING	486,932,747	484,979,543	486,353,876	484,437,875
TOTAL BASIC EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$ 0.89	$ 1.00	$ 2.33	$ 2.55
WEIGHTED AVERAGE NUMBER OF DILUTED AEP COMMON SHARES OUTSTANDING	487,258,905	485,362,858	486,792,914	484,826,123
TOTAL DILUTED EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$ 0.89	$ 1.00	$ 2.33	$ 2.55
CASH DIVIDENDS DECLARED PER SHARE	$ 0.49	$ 0.47	$ 1.45	$ 1.41
Appalachian Power Co [Member]
Revenues
Utility Operations	756,606,000	776,066,000	2,299,587,000	2,161,901,000
Sales to AEP Affiliates	90,558,000	84,940,000	241,311,000	216,284,000
Other Revenues	2,569,000	3,192,000	6,833,000	7,950,000
TOTAL REVENUES	849,733,000	864,198,000	2,547,731,000	2,386,135,000
Expenses
Fuel and Other Consumables Used for Electric Generation	207,442,000	241,448,000	575,902,000	609,985,000
Purchased Electricity for Resale	47,391,000	45,196,000	172,334,000	155,421,000
Purchased Electricity from AEP Affiliates	220,736,000	181,134,000	625,534,000	463,015,000
Other Operation	64,508,000	92,700,000	223,180,000	239,704,000
Maintenance	49,924,000	47,047,000	207,870,000	131,212,000
Depreciation and Amortization	84,513,000	86,636,000	255,656,000	252,188,000
Taxes Other Than Income Taxes	27,527,000	27,315,000	82,931,000	79,272,000
TOTAL EXPENSES	702,041,000	721,476,000	2,143,407,000	1,930,797,000
OPERATING INCOME (LOSS)	147,692,000	142,722,000	404,324,000	455,338,000
Other Income (Expense):
Interest Income	334,000	332,000	2,134,000	1,034,000
Carrying Costs Income	2,793,000	3,950,000	6,029,000	17,202,000
Allowance for Equity Funds Used During Construction	826,000	443,000	2,809,000	960,000
Interest Expense	(47,375,000)	(50,071,000)	(143,707,000)	(153,323,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	104,270,000	97,376,000	271,589,000	321,211,000
Income Tax Expense (Credit)	41,645,000	34,185,000	108,554,000	120,377,000
NET INCOME (LOSS)	62,625,000	63,191,000	163,035,000	200,834,000
Indiana Michigan Power Co [Member]
Revenues
Utility Operations	537,453,000	499,078,000	1,518,357,000	1,371,070,000
Sales to AEP Affiliates	73,576,000	71,324,000	159,888,000	192,967,000
Other Revenues - Affiliated	27,322,000	27,034,000	89,962,000	86,797,000
Other Revenues	514,000	768,000	3,552,000	4,453,000
TOTAL REVENUES	638,865,000	598,204,000	1,771,759,000	1,655,287,000
Expenses
Fuel and Other Consumables Used for Electric Generation	140,193,000	137,960,000	330,088,000	347,045,000
Purchased Electricity for Resale	32,976,000	23,399,000	111,602,000	88,797,000
Purchased Electricity from AEP Affiliates	116,511,000	110,891,000	317,434,000	281,032,000
Other Operation	136,702,000	141,728,000	414,418,000	411,218,000
Maintenance	43,448,000	44,308,000	139,200,000	133,817,000
Depreciation and Amortization	45,393,000	37,734,000	131,991,000	109,273,000
Taxes Other Than Income Taxes	21,278,000	21,698,000	65,899,000	62,491,000
TOTAL EXPENSES	536,501,000	517,718,000	1,510,632,000	1,433,673,000
OPERATING INCOME (LOSS)	102,364,000	80,486,000	261,127,000	221,614,000
Other Income (Expense):
Interest Income	2,360,000	453,000	7,077,000	2,228,000
Allowance for Equity Funds Used During Construction	5,041,000	1,596,000	15,568,000	6,931,000
Interest Expense	(23,932,000)	(26,307,000)	(72,579,000)	(76,733,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	85,833,000	56,228,000	211,193,000	154,040,000
Income Tax Expense (Credit)	27,953,000	16,974,000	69,102,000	45,755,000
NET INCOME (LOSS)	57,880,000	39,254,000	142,091,000	108,285,000
Ohio Power Co [Member]
Revenues
Utility Operations	959,816,000	1,114,339,000	2,710,990,000	3,084,657,000
Sales to AEP Affiliates	313,818,000	229,879,000	873,850,000	584,197,000
Other Revenues - Affiliated	2,715,000	10,207,000	18,138,000	27,297,000
Other Revenues	2,827,000	5,391,000	12,982,000	14,638,000
TOTAL REVENUES	1,279,176,000	1,359,816,000	3,615,960,000	3,710,789,000
Expenses
Fuel and Other Consumables Used for Electric Generation	396,437,000	426,989,000	1,158,389,000	1,095,276,000
Purchased Electricity for Resale	34,568,000	46,146,000	114,911,000	156,384,000
Purchased Electricity from AEP Affiliates	103,869,000	109,453,000	257,540,000	279,954,000
Other Operation	159,965,000	189,566,000	481,417,000	481,994,000
Maintenance	71,670,000	73,024,000	218,962,000	227,643,000
Asset Impairments and Other Related Charges	0	0	154,304,000	0
Depreciation and Amortization	94,802,000	130,026,000	289,472,000	401,465,000
Taxes Other Than Income Taxes	105,070,000	105,503,000	310,285,000	309,341,000
TOTAL EXPENSES	966,381,000	1,080,707,000	2,985,280,000	2,952,057,000
OPERATING INCOME (LOSS)	312,795,000	279,109,000	630,680,000	758,732,000
Other Income (Expense):
Interest Income	476,000	425,000	3,165,000	1,868,000
Carrying Costs Income	2,813,000	7,132,000	9,833,000	14,401,000
Allowance for Equity Funds Used During Construction	1,028,000	998,000	2,853,000	3,036,000
Interest Expense	(45,070,000)	(53,576,000)	(142,487,000)	(160,984,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	272,042,000	234,088,000	504,044,000	617,053,000
Income Tax Expense (Credit)	93,141,000	82,578,000	174,313,000	213,290,000
NET INCOME (LOSS)	178,901,000	151,510,000	329,731,000	403,763,000
Public Service Co Of Oklahoma [Member]
Revenues
Utility Operations	408,803,000	364,851,000	986,008,000	968,683,000
Sales to AEP Affiliates	1,659,000	6,865,000	9,186,000	19,377,000
Other Revenues	621,000	1,156,000	2,865,000	2,654,000
TOTAL REVENUES	411,083,000	372,872,000	998,059,000	990,714,000
Expenses
Fuel and Other Consumables Used for Electric Generation	124,763,000	65,195,000	254,314,000	281,746,000
Purchased Electricity for Resale	55,915,000	75,719,000	179,405,000	145,983,000
Purchased Electricity from AEP Affiliates	13,129,000	5,870,000	30,168,000	16,328,000
Other Operation	60,566,000	58,975,000	162,032,000	154,834,000
Maintenance	25,071,000	25,685,000	78,396,000	78,863,000
Depreciation and Amortization	24,191,000	24,433,000	72,449,000	71,356,000
Taxes Other Than Income Taxes	11,616,000	10,799,000	33,440,000	32,619,000
TOTAL EXPENSES	315,251,000	266,676,000	810,204,000	781,729,000
OPERATING INCOME (LOSS)	95,832,000	106,196,000	187,855,000	208,985,000
Other Income (Expense):
Interest Income	25,000	171,000	1,146,000	1,203,000
Carrying Costs Income	21,000	418,000	338,000	1,560,000
Allowance for Equity Funds Used During Construction	852,000	408,000	2,676,000	1,298,000
Interest Expense	(13,417,000)	(13,735,000)	(40,016,000)	(42,212,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	83,313,000	93,458,000	151,999,000	170,834,000
Income Tax Expense (Credit)	32,217,000	35,355,000	58,778,000	64,872,000
NET INCOME (LOSS)	51,096,000	58,103,000	93,221,000	105,962,000
Southwestern Electric Power Co [Member]
Revenues
Utility Operations	534,196,000	473,391,000	1,324,325,000	1,196,753,000
Sales to AEP Affiliates	18,296,000	11,098,000	41,935,000	26,945,000
Other Revenues	441,000	680,000	1,163,000	1,403,000
TOTAL REVENUES	552,933,000	485,169,000	1,367,423,000	1,225,101,000
Expenses
Fuel and Other Consumables Used for Electric Generation	202,024,000	180,991,000	490,447,000	447,233,000
Purchased Electricity for Resale	37,505,000	35,109,000	120,273,000	97,150,000
Purchased Electricity from AEP Affiliates	815,000	6,121,000	6,757,000	16,965,000
Other Operation	62,108,000	60,217,000	182,351,000	165,877,000
Maintenance	24,654,000	27,816,000	84,725,000	78,835,000
Asset Impairments and Other Related Charges	110,850,000	0	110,850,000	13,000,000
Depreciation and Amortization	41,846,000	35,144,000	132,460,000	103,820,000
Taxes Other Than Income Taxes	20,772,000	19,763,000	59,530,000	53,869,000
TOTAL EXPENSES	500,574,000	365,161,000	1,187,393,000	976,749,000
OPERATING INCOME (LOSS)	52,359,000	120,008,000	180,030,000	248,352,000
Other Income (Expense):
Allowance for Equity Funds Used During Construction			4,872,000	43,401,000
Other Income	2,457,000	15,255,000	5,048,000	44,572,000
Interest Expense	(32,614,000)	(21,498,000)	(100,151,000)	(65,210,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	22,202,000	113,765,000	84,927,000	227,714,000
Income Tax Expense (Credit)	14,935,000	25,229,000	37,057,000	49,206,000
Equity Earnings (Loss) of Unconsolidated Subsidiaries	653,000	682,000	1,825,000	2,007,000
NET INCOME (LOSS)	7,920,000	89,218,000	49,695,000	180,515,000
Net Income Attributable to Noncontrolling Interests	1,058,000	955,000	3,204,000	3,099,000
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 6,862,000	$ 88,263,000	$ 46,491,000	$ 177,416,000