Consolidated Statements of Income (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Revenues
Vertically Integrated Utilities	$ 2,487,000,000us-gaap_ElectricUtilityRevenue	$ 2,549,000,000us-gaap_ElectricUtilityRevenue
Transmission and Distribution Utilities	1,206,000,000	1,161,000,000
Generation & Marketing	859,000,000us-gaap_ElectricalGenerationRevenue	821,000,000us-gaap_ElectricalGenerationRevenue
Other Revenues	156,000,000us-gaap_OtherSalesRevenueNet	117,000,000us-gaap_OtherSalesRevenueNet
TOTAL REVENUES	4,708,000,000us-gaap_Revenues	4,648,000,000us-gaap_Revenues
Expenses
Fuel and Other Consumables Used for Electric Generation	1,071,000,000us-gaap_ElectricProductionExpense	1,168,000,000us-gaap_ElectricProductionExpense
Purchased Electricity for Resale	718,000,000us-gaap_CostOfPurchasedPower	638,000,000us-gaap_CostOfPurchasedPower
Other Operation	746,000,000	780,000,000
Maintenance	294,000,000	292,000,000
Depreciation and Amortization	505,000,000	491,000,000
Taxes Other Than Income Taxes	250,000,000	238,000,000
TOTAL EXPENSES	3,584,000,000us-gaap_OperatingExpenses	3,607,000,000us-gaap_OperatingExpenses
OPERATING INCOME (LOSS)	1,124,000,000us-gaap_OperatingIncomeLoss	1,041,000,000us-gaap_OperatingIncomeLoss
Other Income (Expense):
Interest and Investment Income	1,000,000us-gaap_InvestmentIncomeNet	1,000,000us-gaap_InvestmentIncomeNet
Carrying Costs Income	8,000,000aep_CarryingCostsIncome	6,000,000aep_CarryingCostsIncome
Allowance for Equity Funds Used During Construction	30,000,000	22,000,000
Interest Expense	(223,000,000)us-gaap_InterestExpense	(220,000,000)us-gaap_InterestExpense
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	940,000,000	850,000,000
Income Tax Expense (Credit)	333,000,000us-gaap_IncomeTaxExpenseBenefit	307,000,000us-gaap_IncomeTaxExpenseBenefit
Equity Earnings (Loss) of Unconsolidated Subsidiaries	24,000,000	18,000,000
NET INCOME (LOSS)	631,000,000us-gaap_ProfitLoss	561,000,000us-gaap_ProfitLoss
Net Income Attributable to Noncontrolling Interests	2,000,000	1,000,000
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS	629,000,000	560,000,000
Earnings Per Share
WEIGHTED AVERAGE NUMBER OF BASIC AEP COMMON SHARES OUTSTANDING	489,597,986	487,867,089
TOTAL BASIC EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$ 1.29us-gaap_EarningsPerShareBasic	$ 1.15us-gaap_EarningsPerShareBasic
WEIGHTED AVERAGE NUMBER OF DILUTED AEP COMMON SHARES OUTSTANDING	489,936,726	488,271,167
TOTAL DILUTED EARNINGS PER SHARE ATTRIBUTABLE TO AEP COMMON SHAREHOLDERS	$ 1.29us-gaap_EarningsPerShareDiluted	$ 1.15us-gaap_EarningsPerShareDiluted
CASH DIVIDENDS DECLARED PER SHARE	$ 0.53	$ 0.5
Appalachian Power Co [Member]
Revenues
Vertically Integrated Utilities	854,179,000	866,457,000
Sales to AEP Affiliates	42,515,000	44,914,000
Other Revenues	2,321,000	2,020,000
TOTAL REVENUES	899,015,000	913,391,000
Expenses
Fuel and Other Consumables Used for Electric Generation	223,247,000	230,737,000
Purchased Electricity for Resale	112,669,000	168,991,000
Purchased Electricity from AEP Affiliates	0	4,662,000
Other Operation	106,070,000	93,538,000
Maintenance	52,297,000	60,090,000
Depreciation and Amortization	100,143,000	104,586,000
Taxes Other Than Income Taxes	31,047,000	30,777,000
TOTAL EXPENSES	625,473,000	693,381,000
OPERATING INCOME (LOSS)	273,542,000	220,010,000
Other Income (Expense):
Interest Income	389,000	401,000
Carrying Costs Income	293,000	(1,875,000)
Allowance for Equity Funds Used During Construction	3,008,000	1,235,000
Interest Expense	(50,291,000)	(51,672,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	226,941,000	168,099,000
Income Tax Expense (Credit)	85,148,000	66,248,000
NET INCOME (LOSS)	141,793,000	101,851,000
Indiana Michigan Power Co [Member]
Revenues
Vertically Integrated Utilities	566,250,000	614,843,000
Sales to AEP Affiliates	453,000	2,284,000
Other Revenues - Affiliated	18,580,000	24,727,000
Other Revenues	1,028,000	0
TOTAL REVENUES	586,311,000	641,854,000
Expenses
Fuel and Other Consumables Used for Electric Generation	99,884,000	156,643,000
Purchased Electricity for Resale	55,907,000	5,362,000
Purchased Electricity from AEP Affiliates	54,965,000	72,056,000
Other Operation	128,960,000	141,350,000
Maintenance	47,351,000	48,565,000
Depreciation and Amortization	51,407,000	50,031,000
Taxes Other Than Income Taxes	23,407,000	21,823,000
TOTAL EXPENSES	461,881,000	495,830,000
OPERATING INCOME (LOSS)	124,430,000	146,024,000
Other Income (Expense):
Interest Income	1,748,000	1,049,000
Allowance for Equity Funds Used During Construction	4,043,000	3,964,000
Interest Expense	(22,777,000)	(25,633,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	107,444,000	125,404,000
Income Tax Expense (Credit)	34,770,000	38,315,000
NET INCOME (LOSS)	72,674,000	87,089,000
Ohio Power Co [Member]
Revenues
Transmission and Distribution Utilities	874,217,000	846,906,000
Sales to AEP Affiliates	42,106,000	31,978,000
Other Revenues	2,117,000	1,308,000
TOTAL REVENUES	918,440,000	880,192,000
Expenses
Purchased Electricity for Resale	142,080,000	79,130,000
Purchased Electricity from AEP Affiliates	270,604,000	314,124,000
Amortization of Generation Deferrals	31,454,000	31,186,000
Other Operation	146,844,000	151,426,000
Maintenance	47,573,000	34,651,000
Depreciation and Amortization	59,212,000	58,699,000
Taxes Other Than Income Taxes	97,787,000	95,257,000
TOTAL EXPENSES	795,554,000	764,473,000
OPERATING INCOME (LOSS)	122,886,000	115,719,000
Other Income (Expense):
Interest Income	1,913,000	3,274,000
Carrying Costs Income	6,460,000	7,114,000
Allowance for Equity Funds Used During Construction	2,444,000	1,726,000
Interest Expense	(32,449,000)	(33,007,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	101,254,000	94,826,000
Income Tax Expense (Credit)	35,887,000	34,052,000
NET INCOME (LOSS)	65,367,000	60,774,000
Public Service Co Of Oklahoma [Member]
Revenues
Vertically Integrated Utilities	304,673,000	296,710,000
Sales to AEP Affiliates	1,279,000	4,597,000
Other Revenues	820,000	78,000
TOTAL REVENUES	306,772,000	301,385,000
Expenses
Fuel and Other Consumables Used for Electric Generation	85,599,000	65,937,000
Purchased Electricity for Resale	65,523,000	79,691,000
Purchased Electricity from AEP Affiliates	0	11,024,000
Other Operation	60,765,000	58,711,000
Maintenance	21,140,000	24,745,000
Depreciation and Amortization	29,534,000	23,982,000
Taxes Other Than Income Taxes	9,278,000	11,969,000
TOTAL EXPENSES	271,839,000	276,059,000
OPERATING INCOME (LOSS)	34,933,000	25,326,000
Other Income (Expense):
Allowance for Equity Funds Used During Construction	1,327,000	1,431,000
Other Income	1,363,000	1,428,000
Interest Expense	(14,570,000)	(13,317,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	21,726,000	13,437,000
Income Tax Expense (Credit)	8,041,000	4,989,000
NET INCOME (LOSS)	13,685,000	8,448,000
Southwestern Electric Power Co [Member]
Revenues
Vertically Integrated Utilities	428,535,000	426,627,000
Sales to AEP Affiliates	2,670,000	13,598,000
Other Revenues	504,000	365,000
TOTAL REVENUES	431,709,000	440,590,000
Expenses
Fuel and Other Consumables Used for Electric Generation	157,732,000	145,587,000
Purchased Electricity for Resale	20,014,000	61,165,000
Purchased Electricity from AEP Affiliates	0	3,766,000
Other Operation	65,545,000	68,537,000
Maintenance	27,414,000	30,411,000
Depreciation and Amortization	46,954,000	45,661,000
Taxes Other Than Income Taxes	21,732,000	20,737,000
TOTAL EXPENSES	339,391,000	375,864,000
OPERATING INCOME (LOSS)	92,318,000	64,726,000
Other Income (Expense):
Allowance for Equity Funds Used During Construction	5,229,000	2,081,000
Other Income	5,209,000	1,967,000
Interest Expense	(30,215,000)	(31,876,000)
INCOME BEFORE INCOME TAX EXPENSE (CREDIT) AND EQUITY EARNINGS (LOSS)	67,312,000	34,817,000
Income Tax Expense (Credit)	21,172,000	12,165,000
Equity Earnings (Loss) of Unconsolidated Subsidiaries	597,000	310,000
NET INCOME (LOSS)	46,737,000	22,962,000
Net Income Attributable to Noncontrolling Interests	1,033,000	1,102,000
EARNINGS ATTRIBUTABLE TO COMMON SHAREHOLDERS	$ 45,704,000	$ 21,860,000

Amortizations related to recoveries of pre-2012 deferred fuel balances are recovered by the Phase In Recover Rider. Amortizations related to recoveries of deferred capacity costs are recovered by the Retail Stability Rider ($1/MWH is the Distribution portion through 5/31/15).

No definition available.