Consolidated Statements of Income (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues
Vertically Integrated Utilities	$ 2,549,000,000	$ 2,356,000,000
Transmission and Distribution Utilities	1,161,000,000	1,090,000,000
Generation and Marketing	821,000,000	258,000,000
Other Revenues	117,000,000	122,000,000
TOTAL REVENUES	4,648,000,000	3,826,000,000
Expenses
Fuel and Other Consumables Used for Electric Generation	1,168,000,000	1,031,000,000
Purchased Electricity for Resale	638,000,000	371,000,000
Other Operation	780,000,000	738,000,000
Maintenance	292,000,000	293,000,000
Depreciation and Amortization	491,000,000	420,000,000
Taxes Other Than Income Taxes	238,000,000	218,000,000
TOTAL EXPENSES	3,607,000,000	3,071,000,000
OPERATING INCOME (LOSS)	1,041,000,000	755,000,000
Other Income (Expense):
Interest and Investment Income	1,000,000	3,000,000
Carrying Costs Income	6,000,000	4,000,000
Allowance for Equity Funds Used During Construction	22,000,000	15,000,000
Interest Expense	(220,000,000)	(232,000,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	850,000,000	545,000,000
Income Tax Expense (Credit)	307,000,000	195,000,000
Equity Earnings (Loss) of Unconsolidated Subsidiaries	18,000,000	14,000,000
NET INCOME (LOSS)	561,000,000	364,000,000
Net Income Attributable to Noncontrolling Interests	1,000,000	1,000,000
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS	560,000,000	363,000,000
Earnings Per Share
WEIGHTED AVERAGE NUMBER OF BASIC AEP COMMON SHARES OUTSTANDING	487,867,089	485,823,668
TOTAL BASIC EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$ 1.15	$ 0.75
WEIGHTED AVERAGE NUMBER OF DILUTED AEP COMMON SHARES OUTSTANDING	488,271,167	486,344,036
TOTAL DILUTED EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$ 1.15	$ 0.75
CASH DIVIDENDS DECLARED PER SHARE	$ 0.50	$ 0.47
Appalachian Power Co [Member]
Revenues
Vertically Integrated Utilities	866,457,000	872,732,000
Sales to AEP Affiliates	44,914,000	76,860,000
Other Revenues	2,020,000	1,902,000
TOTAL REVENUES	913,391,000	951,494,000
Expenses
Fuel and Other Consumables Used for Electric Generation	230,737,000	204,939,000
Purchased Electricity for Resale	168,991,000	65,456,000
Purchased Electricity from AEP Affiliates	4,662,000	222,942,000
Other Operation	93,538,000	78,908,000
Maintenance	60,090,000	99,386,000
Depreciation and Amortization	104,586,000	87,903,000
Taxes Other Than Income Taxes	30,777,000	27,400,000
TOTAL EXPENSES	693,381,000	786,934,000
OPERATING INCOME (LOSS)	220,010,000	164,560,000
Other Income (Expense):
Interest Income	401,000	331,000
Carrying Costs Income	(1,875,000)	103,000
Allowance for Equity Funds Used During Construction	1,235,000	770,000
Interest Expense	(51,672,000)	(48,204,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	168,099,000	117,560,000
Income Tax Expense (Credit)	66,248,000	47,012,000
NET INCOME (LOSS)	101,851,000	70,548,000
Indiana Michigan Power Co [Member]
Revenues
Vertically Integrated Utilities	614,843,000	490,603,000
Sales to AEP Affiliates	2,284,000	54,977,000
Other Revenues - Affiliated	24,727,000	35,825,000
Other Revenues	0	1,988,000
TOTAL REVENUES	641,854,000	583,393,000
Expenses
Fuel and Other Consumables Used for Electric Generation	156,643,000	104,865,000
Purchased Electricity for Resale	5,362,000	41,812,000
Purchased Electricity from AEP Affiliates	72,056,000	101,376,000
Other Operation	141,350,000	145,238,000
Maintenance	48,565,000	45,514,000
Depreciation and Amortization	50,031,000	40,902,000
Taxes Other Than Income Taxes	21,823,000	22,456,000
TOTAL EXPENSES	495,830,000	502,163,000
OPERATING INCOME (LOSS)	146,024,000	81,230,000
Other Income (Expense):
Interest Income	1,049,000	2,055,000
Allowance for Equity Funds Used During Construction	3,964,000	5,646,000
Interest Expense	(25,633,000)	(24,211,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	125,404,000	64,720,000
Income Tax Expense (Credit)	38,315,000	21,263,000
NET INCOME (LOSS)	87,089,000	43,457,000
Ohio Power Co [Member]
Revenues
Transmission and Distribution Utilities	846,906,000	933,681,000
Sales to AEP Affiliates	31,978,000	285,642,000
Other Revenues - Affiliated	0	7,840,000
Other Revenues	1,308,000	6,627,000
TOTAL REVENUES	880,192,000	1,233,790,000
Expenses
Fuel and Other Consumables Used for Electric Generation	0	409,584,000
Purchased Electricity for Resale	79,130,000	43,185,000
Purchased Electricity from AEP Affiliates	314,124,000	80,381,000
Other Operation	151,426,000	184,187,000
Maintenance	34,651,000	74,295,000
Depreciation and Amortization	58,699,000	92,324,000
Amortization of Generation Deferrals	31,186,000	0
Taxes Other Than Income Taxes	95,257,000	105,021,000
TOTAL EXPENSES	764,473,000	988,977,000
OPERATING INCOME (LOSS)	115,719,000	244,813,000
Other Income (Expense):
Interest Income	3,274,000	363,000
Carrying Costs Income	7,114,000	3,263,000
Allowance for Equity Funds Used During Construction	1,726,000	1,304,000
Interest Expense	(33,007,000)	(50,173,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	94,826,000	199,570,000
Income Tax Expense (Credit)	34,052,000	69,796,000
NET INCOME (LOSS)	60,774,000	129,774,000
Public Service Co Of Oklahoma [Member]
Revenues
Vertically Integrated Utilities	296,710,000	259,903,000
Sales to AEP Affiliates	4,597,000	1,834,000
Other Revenues	78,000	552,000
TOTAL REVENUES	301,385,000	262,289,000
Expenses
Fuel and Other Consumables Used for Electric Generation	65,937,000	43,310,000
Purchased Electricity for Resale	79,691,000	64,655,000
Purchased Electricity from AEP Affiliates	11,024,000	10,216,000
Other Operation	58,711,000	47,807,000
Maintenance	24,745,000	28,572,000
Depreciation and Amortization	23,982,000	24,180,000
Taxes Other Than Income Taxes	11,969,000	9,997,000
TOTAL EXPENSES	276,059,000	228,737,000
OPERATING INCOME (LOSS)	25,326,000	33,552,000
Other Income (Expense):
Allowance for Equity Funds Used During Construction	1,431,000	980,000
Other Income	1,428,000	2,115,000
Interest Expense	(13,317,000)	(13,340,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	13,437,000	22,327,000
Income Tax Expense (Credit)	4,989,000	8,634,000
NET INCOME (LOSS)	8,448,000	13,693,000
Southwestern Electric Power Co [Member]
Revenues
Vertically Integrated Utilities	426,627,000	381,277,000
Sales to AEP Affiliates	13,598,000	12,709,000
Other Revenues	365,000	331,000
TOTAL REVENUES	440,590,000	394,317,000
Expenses
Fuel and Other Consumables Used for Electric Generation	145,587,000	151,358,000
Purchased Electricity for Resale	61,165,000	39,760,000
Purchased Electricity from AEP Affiliates	3,766,000	1,017,000
Other Operation	68,537,000	59,448,000
Maintenance	30,411,000	27,791,000
Depreciation and Amortization	45,661,000	44,882,000
Taxes Other Than Income Taxes	20,737,000	19,422,000
TOTAL EXPENSES	375,864,000	343,678,000
OPERATING INCOME (LOSS)	64,726,000	50,639,000
Other Income (Expense):
Allowance for Equity Funds Used During Construction	2,081,000	1,024,000
Other Income	1,967,000	1,054,000
Interest Expense	(31,876,000)	(33,990,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	34,817,000	17,703,000
Income Tax Expense (Credit)	12,165,000	6,796,000
Equity Earnings (Loss) of Unconsolidated Subsidiaries	310,000	641,000
NET INCOME (LOSS)	22,962,000	11,548,000
Net Income Attributable to Noncontrolling Interests	1,102,000	1,090,000
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 21,860,000	$ 10,458,000