Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Operating Activities
Net Income (Loss)	$ 1,446,000,000	$ 1,137,000,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	1,441,000,000	1,310,000,000
Deferred Income Taxes	383,000,000	582,000,000
Asset Impairments and Other Related Charges	0	298,000,000
Carrying Costs Income	(22,000,000)	(20,000,000)
Allowance for Equity Funds Used During Construction	(74,000,000)	(51,000,000)
Mark-to-Market of Risk Management Contracts	15,000,000	29,000,000
Amortization of Nuclear Fuel	114,000,000	101,000,000
Pension Contributions to Qualified Plan Trust	(71,000,000)	0
Property Taxes	220,000,000	191,000,000
Fuel Over/Under-Recovery, Net	(77,000,000)	38,000,000
Deferral of Ohio Capacity Costs, Net	(106,000,000)	(157,000,000)
Change in Other Noncurrent Assets	(54,000,000)	(35,000,000)
Change in Other Noncurrent Liabilities	272,000,000	16,000,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	0	4,000,000
Fuel, Materials and Supplies	222,000,000	72,000,000
Accounts Payable	(43,000,000)	(28,000,000)
Accrued Taxes, Net	32,000,000	(278,000,000)
Other Current Assets	(12,000,000)	(5,000,000)
Other Current Liabilities	39,000,000	(164,000,000)
Net Cash Flows from (Used for) Operating Activities	3,725,000,000	3,040,000,000
Investing Activities
Construction Expenditures	(2,899,000,000)	(2,481,000,000)
Change in Other Temporary Investments, Net	37,000,000	53,000,000
Purchases of Investment Securities	(791,000,000)	(693,000,000)
Sales of Investment Securities	746,000,000	635,000,000
Acquisitions of Nuclear Fuel	(109,000,000)	(110,000,000)
Acquisitions of Assets/Businesses	(45,000,000)	(6,000,000)
Insurance Proceeds Related to Cook Plant Fire	0	72,000,000
Proceeds from Sales of Assets	2,000,000	14,000,000
Other Investing Activities	(22,000,000)	(4,000,000)
Net Cash Flows from (Used for) Investing Activities	(3,081,000,000)	(2,520,000,000)
Financing Activities
Issuance of Common Stock, Net	63,000,000	61,000,000
Issuance of Long-term Debt	1,206,000,000	2,087,000,000
Credit Facility Borrowings	0	17,000,000
Change in Short-term Debt, Net	525,000,000	240,000,000
Retirement of Long-term Debt	(1,538,000,000)	(2,281,000,000)
Credit Facility Repayments	0	(20,000,000)
Principal Payments for Capital Lease Obligations	(91,000,000)	(53,000,000)
Dividends Paid on Common Stock	(736,000,000)	(709,000,000)
Other Financing Activities	3,000,000	6,000,000
Net Cash Flows from (Used for) Financing Activities	(568,000,000)	(652,000,000)
Net Increase (Decrease) in Cash and Cash Equivalents	76,000,000	(132,000,000)
Cash and Cash Equivalents at Beginning of Period	118,000,000	279,000,000
Cash and Cash Equivalents at End of Period	194,000,000	147,000,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	649,000,000	702,000,000
Net Cash Paid (Received) for Income Taxes	109,000,000	(64,000,000)
Noncash Acquisitions Under Capital Leases	80,000,000	53,000,000
Construction Expenditures Included in Current Liabilities as of September 30,	515,000,000	363,000,000
Appalachian Power Co [Member]
Operating Activities
Net Income (Loss)	186,856,000	163,035,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	300,125,000	255,656,000
Deferred Income Taxes	114,778,000	89,501,000
Carrying Costs Income	1,130,000	(6,029,000)
Deferral of Storm Costs	5,112,000	34,364,000
Allowance for Equity Funds Used During Construction	(4,525,000)	(2,809,000)
Mark-to-Market of Risk Management Contracts	255,000	9,409,000
Pension Contributions to Qualified Plan Trust	(8,963,000)	0
Property Taxes	25,856,000	21,940,000
Fuel Over/Under-Recovery, Net	(114,022,000)	46,009,000
Change in Other Noncurrent Assets	(24,290,000)	(19,784,000)
Change in Other Noncurrent Liabilities	29,312,000	10,199,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	114,387,000	62,363,000
Fuel, Materials and Supplies	78,977,000	5,094,000
Accounts Payable	(65,358,000)	(76,665,000)
Accrued Taxes, Net	(43,092,000)	(726,000)
Other Current Assets	(3,748,000)	1,970,000
Other Current Liabilities	9,085,000	(14,820,000)
Net Cash Flows from (Used for) Operating Activities	601,875,000	578,707,000
Investing Activities
Construction Expenditures	(342,291,000)	(272,433,000)
Change in Advances to Affiliates, Net	22,395,000	(400,000)
Other Investing Activities	(1,114,000)	103,000
Net Cash Flows from (Used for) Investing Activities	(321,010,000)	(272,730,000)
Financing Activities
Issuance of Long-term Debt	295,039,000	69,346,000
Change in Advances from Affiliates, Net	0	102,811,000
Retirement of Long-term Debt	(512,702,000)	(345,021,000)
Principal Payments for Capital Lease Obligations	(4,255,000)	(4,049,000)
Dividends Paid on Common Stock	(60,000,000)	(130,000,000)
Other Financing Activities	1,009,000	1,490,000
Net Cash Flows from (Used for) Financing Activities	(280,909,000)	(305,423,000)
Net Increase (Decrease) in Cash and Cash Equivalents	(44,000)	554,000
Cash and Cash Equivalents at Beginning of Period	2,745,000	3,576,000
Cash and Cash Equivalents at End of Period	2,701,000	4,130,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	136,919,000	131,600,000
Net Cash Paid (Received) for Income Taxes	22,148,000	(3,746,000)
Noncash Acquisitions Under Capital Leases	3,451,000	3,440,000
Construction Expenditures Included in Current Liabilities as of September 30,	54,463,000	43,802,000
Indiana Michigan Power Co [Member]
Operating Activities
Net Income (Loss)	141,049,000	142,091,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	150,062,000	131,991,000
Deferred Income Taxes	15,792,000	84,067,000
Amortization (Deferral) of Incremental Nuclear Refueling Outage Expense, Net	23,951,000	(15,450,000)
Allowance for Equity Funds Used During Construction	(14,364,000)	(15,568,000)
Mark-to-Market of Risk Management Contracts	(2,196,000)	12,995,000
Amortization of Nuclear Fuel	114,238,000	101,316,000
Fuel Over/Under-Recovery, Net	18,931,000	6,459,000
Change in Other Noncurrent Assets	(36,596,000)	(718,000)
Change in Other Noncurrent Liabilities	66,502,000	25,249,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	59,646,000	23,111,000
Fuel, Materials and Supplies	14,884,000	(9,859,000)
Accounts Payable	(12,052,000)	(35,517,000)
Accrued Taxes, Net	30,719,000	(8,987,000)
Other Current Assets	11,741,000	18,948,000
Other Current Liabilities	(8,201,000)	(4,130,000)
Net Cash Flows from (Used for) Operating Activities	574,106,000	455,998,000
Investing Activities
Construction Expenditures	(345,369,000)	(360,668,000)
Change in Advances to Affiliates, Net	42,364,000	(205,499,000)
Purchases of Investment Securities	(789,461,000)	(675,727,000)
Sales of Investment Securities	746,272,000	635,256,000
Acquisitions of Nuclear Fuel	(109,224,000)	(109,598,000)
Insurance Proceeds Related to Cook Plant Fire	0	72,000,000
Other Investing Activities	11,773,000	27,888,000
Net Cash Flows from (Used for) Investing Activities	(443,645,000)	(616,348,000)
Financing Activities
Issuance of Long-term Debt	99,323,000	348,892,000
Change in Advances from Affiliates, Net	95,899,000	0
Retirement of Long-term Debt	(190,550,000)	(137,544,000)
Principal Payments for Capital Lease Obligations	(35,660,000)	(4,112,000)
Dividends Paid on Common Stock	(100,000,000)	(47,500,000)
Other Financing Activities	628,000	850,000
Net Cash Flows from (Used for) Financing Activities	(130,360,000)	160,586,000
Net Increase (Decrease) in Cash and Cash Equivalents	101,000	236,000
Cash and Cash Equivalents at Beginning of Period	1,317,000	1,562,000
Cash and Cash Equivalents at End of Period	1,418,000	1,798,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	75,789,000	76,468,000
Net Cash Paid (Received) for Income Taxes	(1,475,000)	(35,307,000)
Noncash Acquisitions Under Capital Leases	5,015,000	2,858,000
Construction Expenditures Included in Current Liabilities as of September 30,	69,241,000	54,082,000
Acquisition of Nuclear Fuel Included in Current Liabilities as of September 30,	11,000	279,000
Expected Reimbursement for Spent Nuclear Fuel Dry Cask Storage	3,208,000	19,000
Ohio Power Co [Member]
Operating Activities
Net Income (Loss)	171,369,000	329,731,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	165,152,000	289,472,000
Amortization of Generation Deferrals	82,818,000	0
Deferred Income Taxes	27,990,000	111,850,000
Asset Impairments and Other Related Charges	0	154,304,000
Carrying Costs Income	(19,594,000)	(9,833,000)
Allowance for Equity Funds Used During Construction	(4,893,000)	(2,853,000)
Mark-to-Market of Risk Management Contracts	(5,003,000)	14,037,000
Pension Contributions to Qualified Plan Trust	(6,547,000)	0
Property Taxes	148,124,000	166,607,000
Fuel Over/Under-Recovery, Net	37,326,000	21,271,000
Deferral of Ohio Capacity Costs, Net	(138,737,000)	(156,952,000)
Change in Other Noncurrent Assets	35,962,000	(29,012,000)
Change in Other Noncurrent Liabilities	59,081,000	(11,664,000)
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(20,395,000)	123,893,000
Fuel, Materials and Supplies	(1,247,000)	79,028,000
Accounts Payable	(83,029,000)	(67,487,000)
Customer Deposits	2,973,000	(2,275,000)
Accrued Taxes, Net	(173,470,000)	(187,677,000)
Other Current Assets	(947,000)	3,246,000
Other Current Liabilities	26,039,000	(36,976,000)
Net Cash Flows from (Used for) Operating Activities	302,972,000	788,710,000
Investing Activities
Construction Expenditures	(327,972,000)	(445,189,000)
Change in Restricted Cash for Securitized Funding	1,653,000	0
Change in Advances to Affiliates, Net	315,325,000	101,616,000
Proceeds from Sales of Assets	886,000	13,059,000
Proceeds from Notes Receivable Affiliated	178,580,000	0
Other Investing Activities	5,921,000	(8,586,000)
Net Cash Flows from (Used for) Investing Activities	174,393,000	(339,100,000)
Financing Activities
Issuance of Long-term Debt	0	977,002,000
Issuance of Long-term Debt - Affiliated	0	200,000,000
Change in Advances from Affiliates, Net	0	1,063,000
Retirement of Long-term Debt	(438,583,000)	(1,146,000,000)
Retirement of Long-term Debt - Affiliated	0	(200,000,000)
Principal Payments for Capital Lease Obligations	(3,912,000)	(7,920,000)
Dividends Paid on Common Stock	(35,000,000)	(275,000,000)
Other Financing Activities	1,015,000	1,946,000
Net Cash Flows from (Used for) Financing Activities	(476,480,000)	(448,909,000)
Net Increase (Decrease) in Cash and Cash Equivalents	885,000	701,000
Cash and Cash Equivalents at Beginning of Period	3,004,000	3,640,000
Cash and Cash Equivalents at End of Period	3,889,000	4,341,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	90,188,000	145,817,000
Net Cash Paid (Received) for Income Taxes	15,523,000	38,446,000
Noncash Acquisitions Under Capital Leases	4,505,000	5,756,000
Government Grants Included in Accounts Receivable as of September 30,	0	377,000
Construction Expenditures Included in Current Liabilities as of September 30,	45,691,000	68,481,000
Noncash Distribution of Cook Coal Terminal to Parent	0	(22,303,000)
Public Service Co Of Oklahoma [Member]
Operating Activities
Net Income (Loss)	75,983,000	93,221,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	73,085,000	72,449,000
Deferred Income Taxes	27,327,000	39,665,000
Carrying Costs Income	0	(338,000)
Allowance for Equity Funds Used During Construction	(2,215,000)	(2,676,000)
Mark-to-Market of Risk Management Contracts	432,000	(4,984,000)
Pension Contributions to Qualified Plan Trust	(4,439,000)	0
Property Taxes	(7,970,000)	(10,177,000)
Fuel Over/Under-Recovery, Net	(33,246,000)	(9,201,000)
Change in Other Noncurrent Assets	2,035,000	(3,513,000)
Change in Other Noncurrent Liabilities	(2,015,000)	(13,094,000)
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	333,000	6,454,000
Fuel, Materials and Supplies	5,755,000	3,876,000
Accounts Payable	(28,643,000)	8,783,000
Accrued Taxes, Net	32,131,000	37,739,000
Other Current Assets	(4,034,000)	216,000
Other Current Liabilities	17,024,000	(3,780,000)
Net Cash Flows from (Used for) Operating Activities	151,543,000	214,978,000
Investing Activities
Construction Expenditures	(256,741,000)	(172,602,000)
Change in Advances to Affiliates, Net	0	(8,884,000)
Other Investing Activities	2,881,000	10,657,000
Net Cash Flows from (Used for) Investing Activities	(253,860,000)	(170,829,000)
Financing Activities
Issuance of Long-term Debt	74,973,000	0
Change in Advances from Affiliates, Net	64,095,000	0
Retirement of Long-term Debt	(34,010,000)	(301,000)
Principal Payments for Capital Lease Obligations	(2,785,000)	(2,558,000)
Dividends Paid on Common Stock	0	(41,250,000)
Other Financing Activities	595,000	593,000
Net Cash Flows from (Used for) Financing Activities	102,868,000	(43,516,000)
Net Increase (Decrease) in Cash and Cash Equivalents	551,000	633,000
Cash and Cash Equivalents at Beginning of Period	1,277,000	1,367,000
Cash and Cash Equivalents at End of Period	1,828,000	2,000,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	37,458,000	36,054,000
Net Cash Paid (Received) for Income Taxes	(416,000)	2,026,000
Noncash Acquisitions Under Capital Leases	2,098,000	4,068,000
Construction Expenditures Included in Current Liabilities as of September 30,	33,527,000	33,820,000
Southwestern Electric Power Co [Member]
Operating Activities
Net Income (Loss)	130,332,000	49,695,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	138,316,000	132,460,000
Deferred Income Taxes	181,482,000	27,736,000
Asset Impairments and Other Related Charges	0	110,850,000
Allowance for Equity Funds Used During Construction	(7,415,000)	(4,872,000)
Mark-to-Market of Risk Management Contracts	802,000	(591,000)
Pension Contributions to Qualified Plan Trust	(3,832,000)	0
Property Taxes	(12,503,000)	(11,804,000)
Fuel Over/Under-Recovery, Net	(19,547,000)	(24,110,000)
Change in Other Noncurrent Assets	11,926,000	21,935,000
Change in Other Noncurrent Liabilities	39,000	(10,203,000)
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	36,622,000	(7,384,000)
Fuel, Materials and Supplies	22,500,000	8,638,000
Accounts Payable	(15,046,000)	(7,626,000)
Accrued Taxes, Net	(76,982,000)	36,127,000
Increase (Decrease) in Interest Payable, Net	(24,406,000)	(24,752,000)
Other Current Assets	(7,448,000)	(1,483,000)
Other Current Liabilities	(2,983,000)	(13,770,000)
Net Cash Flows from (Used for) Operating Activities	351,857,000	280,846,000
Investing Activities
Construction Expenditures	(351,666,000)	(284,650,000)
Change in Advances to Affiliates, Net	0	135,195,000
Other Investing Activities	4,334,000	(383,000)
Net Cash Flows from (Used for) Investing Activities	(347,332,000)	(149,838,000)
Financing Activities
Issuance of Long-term Debt	99,633,000	0
Credit Facility Borrowings	0	17,091,000
Change in Advances from Affiliates, Net	(2,851,000)	0
Retirement of Long-term Debt	(3,250,000)	(3,250,000)
Credit Facility Repayments	0	(19,694,000)
Principal Payments for Capital Lease Obligations	(13,673,000)	(13,394,000)
Dividends Paid on Common Stock	(75,000,000)	(93,750,000)
Dividends Paid on Common Stock	(3,483,000)	(3,142,000)
Other Financing Activities	844,000	746,000
Net Cash Flows from (Used for) Financing Activities	2,220,000	(115,393,000)
Net Increase (Decrease) in Cash and Cash Equivalents	6,745,000	15,615,000
Cash and Cash Equivalents at Beginning of Period	17,241,000	2,036,000
Cash and Cash Equivalents at End of Period	23,986,000	17,651,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	113,137,000	115,627,000
Net Cash Paid (Received) for Income Taxes	(13,820,000)	265,000
Noncash Acquisitions Under Capital Leases	3,923,000	3,848,000
Construction Expenditures Included in Current Liabilities as of September 30,	$ 88,291,000	$ 44,815,000