Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011
Operating Activities
Net Income (Loss)	$ 1,241,000,000	$ 1,638,000,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	1,353,000,000	1,258,000,000
Deferred Income Taxes	592,000,000	764,000,000
Gain on Settlement with BOA and Enron	0	(51,000,000)
Settlement of Litigation with BOA and Enron	0	(211,000,000)
Extraordinary Item, Net of Tax	0	(273,000,000)
Asset Impairments and Other Related Charges	13,000,000	90,000,000
Carrying Costs Income	(42,000,000)	(323,000,000)
Allowance for Equity Funds Used During Construction	(70,000,000)	(69,000,000)
Mark-to-Market of Risk Management Contracts	70,000,000	84,000,000
Amortization of Nuclear Fuel	100,000,000	108,000,000
Pension Contributions to Qualified Plan Trust	(100,000,000)	(150,000,000)
Property Taxes	181,000,000	173,000,000
Fuel Over/Under-Recovery, Net	133,000,000	(94,000,000)
Change in Other Noncurrent Assets	(195,000,000)	(32,000,000)
Change in Other Noncurrent Liabilities	119,000,000	225,000,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(4,000,000)	51,000,000
Fuel, Materials and Supplies	(169,000,000)	275,000,000
Accounts Payable	(135,000,000)	(66,000,000)
Accrued Taxes, Net	(130,000,000)	(42,000,000)
Accrued Interest	(32,000,000)	(46,000,000)
Other Current Assets	(28,000,000)	13,000,000
Other Current Liabilities	15,000,000	16,000,000
Net Cash Flows from (Used for) Operating Activities	2,912,000,000	3,338,000,000
Investing Activities
Construction Expenditures	(2,108,000,000)	(1,849,000,000)
Change in Other Temporary Investments, Net	19,000,000	62,000,000
Purchases of Investment Securities	(745,000,000)	(1,024,000,000)
Sales of Investment Securities	699,000,000	1,094,000,000
Acquisitions of Nuclear Fuel	(13,000,000)	(104,000,000)
Acquisitions of Assets/Businesses	(89,000,000)	(10,000,000)
Acquisition of Cushion Gas from BOA	0	(214,000,000)
Proceeds from Sales of Assets	13,000,000	116,000,000
Other Investing Activities	(57,000,000)	(38,000,000)
Net Cash Flows from (Used for) Investing Activities	(2,281,000,000)	(1,967,000,000)
Financing Activities
Issuance of Common Stock, Net	64,000,000	70,000,000
Issuance of Long-term Debt	1,600,000,000	1,118,000,000
Credit Facility Borrowings	21,000,000	462,000,000
Change in Short-term Debt, Net	(417,000,000)	290,000,000
Retirement of Long-term Debt	(904,000,000)	(1,520,000,000)
Credit Facility Repayments	(38,000,000)	(819,000,000)
Principal Payments for Capital Lease Obligations	(53,000,000)	(53,000,000)
Dividends Paid on Common Stock	(687,000,000)	(668,000,000)
Dividends Paid on Cumulative Preferred Stock	0	(2,000,000)
Other Financing Activities	5,000,000	3,000,000
Net Cash Flows from (Used for) Financing Activities	(409,000,000)	(1,119,000,000)
Net Increase (Decrease) in Cash and Cash Equivalents	222,000,000	252,000,000
Cash and Cash Equivalents at Beginning of Period	221,000,000	294,000,000
Cash and Cash Equivalents at End of Period	443,000,000	546,000,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	698,000,000	716,000,000
Net Cash Paid (Received) for Income Taxes	(44,000,000)	(119,000,000)
Noncash Acquisitions Under Capital Leases	46,000,000	39,000,000
Construction Expenditures Included in Current Liabilities as of September 30,	325,000,000	304,000,000
Acquisition of Nuclear Fuel Included in Current Liabilities as of September 30,	43,000,000	0
Noncash Assumption of Liabilities Related to Acquisitions	56,000,000	0
Noncash Increase in Long-Term Debt Through the Fort Wayne Lease Settlement	0	27,000,000
Appalachian Power Co [Member]
Operating Activities
Net Income (Loss)	200,834,000	123,411,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	252,188,000	205,492,000
Deferred Income Taxes	84,850,000	184,986,000
Carrying Costs Income	(17,202,000)	(17,560,000)
Deferral Of Storm Costs	(57,638,000)	(16,977,000)
Allowance for Equity Funds Used During Construction	(960,000)	(4,546,000)
Mark-to-Market of Risk Management Contracts	10,284,000	13,161,000
Property Taxes	20,056,000	19,231,000
Fuel Over/Under-Recovery, Net	61,404,000	(20,603,000)
Change in Other Noncurrent Assets	(35,501,000)	11,121,000
Change in Other Noncurrent Liabilities	7,155,000	1,014,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	94,528,000	124,404,000
Fuel, Materials and Supplies	(44,007,000)	132,579,000
Accounts Payable	(27,443,000)	(72,682,000)
Accrued Taxes, Net	(709,000)	(54,214,000)
Other Current Assets	1,754,000	13,023,000
Other Current Liabilities	12,128,000	3,984,000
Net Cash Flows from (Used for) Operating Activities	561,721,000	645,824,000
Investing Activities
Construction Expenditures	(323,866,000)	(300,357,000)
Change in Advances to Affiliates, Net	(759,000)	(81,825,000)
Acquisitions of Assets/Businesses	(171,000)	(302,217,000)
Other Investing Activities	8,051,000	11,885,000
Net Cash Flows from (Used for) Investing Activities	(316,745,000)	(672,514,000)
Financing Activities
Capital Contribution from Parent	0	100,000,000
Issuance of Long-term Debt	339,396,000	640,027,000
Change in Advances from Affiliates, Net	(80,674,000)	(128,331,000)
Retirement of Long-term Debt	(364,868,000)	(479,666,000)
Retirement of Cumulative Preferred Stock	0	(8,000)
Principal Payments for Capital Lease Obligations	(4,873,000)	(5,546,000)
Dividends Paid on Common Stock	(135,000,000)	(97,500,000)
Dividends Paid on Cumulative Preferred Stock	0	(599,000)
Other Financing Activities	301,000	31,000
Net Cash Flows from (Used for) Financing Activities	(245,718,000)	28,408,000
Net Increase (Decrease) in Cash and Cash Equivalents	(742,000)	1,718,000
Cash and Cash Equivalents at Beginning of Period	2,317,000	951,000
Cash and Cash Equivalents at End of Period	1,575,000	2,669,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	137,992,000	145,969,000
Net Cash Paid (Received) for Income Taxes	10,870,000	(74,384,000)
Noncash Acquisitions Under Capital Leases	2,338,000	697,000
Government Grants Included in Accounts Receivable as of September 30,	0	137,000
Construction Expenditures Included in Current Liabilities as of September 30,	59,041,000	60,265,000
Indiana Michigan Power Co [Member]
Operating Activities
Net Income (Loss)	108,285,000	128,515,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	109,273,000	100,564,000
Deferred Income Taxes	46,365,000	71,121,000
Amortization (Deferral) of Incremental Nuclear Refueling Outage Expense, Net	2,598,000	13,544,000
Allowance for Equity Funds Used During Construction	(6,931,000)	(11,790,000)
Mark-to-Market of Risk Management Contracts	9,882,000	9,014,000
Amortization of Nuclear Fuel	100,435,000	107,801,000
Fuel Over/Under-Recovery, Net	2,867,000	(4,676,000)
Change in Other Noncurrent Assets	14,214,000	15,975,000
Change in Other Noncurrent Liabilities	46,263,000	24,603,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	25,415,000	78,062,000
Fuel, Materials and Supplies	7,315,000	40,476,000
Accounts Payable	(75,799,000)	(50,265,000)
Accrued Taxes, Net	7,398,000	74,510,000
Other Current Assets	(3,368,000)	2,924,000
Other Current Liabilities	39,541,000	24,264,000
Net Cash Flows from (Used for) Operating Activities	433,753,000	624,642,000
Investing Activities
Construction Expenditures	(212,006,000)	(224,749,000)
Change in Advances to Affiliates, Net	(189,054,000)	(134,004,000)
Purchases of Investment Securities	(744,131,000)	(870,769,000)
Sales of Investment Securities	698,567,000	825,689,000
Acquisitions of Nuclear Fuel	(12,545,000)	(103,970,000)
Other Investing Activities	29,714,000	35,583,000
Net Cash Flows from (Used for) Investing Activities	(429,455,000)	(472,220,000)
Financing Activities
Issuance of Long-term Debt	128,228,000	76,414,000
Change in Advances from Affiliates, Net	0	(42,769,000)
Retirement of Long-term Debt	(78,062,000)	(122,469,000)
Principal Payments for Capital Lease Obligations	(4,929,000)	(6,353,000)
Dividends Paid on Common Stock	(50,000,000)	(56,250,000)
Dividends Paid on Cumulative Preferred Stock	0	(255,000)
Other Financing Activities	212,000	53,000
Net Cash Flows from (Used for) Financing Activities	(4,551,000)	(151,629,000)
Net Increase (Decrease) in Cash and Cash Equivalents	(253,000)	793,000
Cash and Cash Equivalents at Beginning of Period	1,020,000	361,000
Cash and Cash Equivalents at End of Period	767,000	1,154,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	79,158,000	76,390,000
Net Cash Paid (Received) for Income Taxes	(29,089,000)	(96,339,000)
Noncash Acquisitions Under Capital Leases	4,993,000	2,492,000
Construction Expenditures Included in Current Liabilities as of September 30,	43,334,000	28,132,000
Acquisition of Nuclear Fuel Included in Current Liabilities as of September 30,	42,957,000	46,000
Noncash Increase in Long-Term Debt Through the Fort Wayne Lease Settlement	0	26,802,000
Expected Reimbursement for Spent Nuclear Fuel Dry Cask Storage	28,057,000	0
Ohio Power Co [Member]
Operating Activities
Net Income (Loss)	403,763,000	436,503,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	401,465,000	412,736,000
Deferred Income Taxes	126,009,000	117,803,000
Asset Impairments and Other Related Charges	0	89,824,000
Carrying Costs Income	(14,401,000)	(42,164,000)
Allowance for Equity Funds Used During Construction	(3,036,000)	(4,124,000)
Mark-to-Market of Risk Management Contracts	12,420,000	14,548,000
Property Taxes	164,496,000	160,466,000
Fuel Over/Under-Recovery, Net	4,766,000	(41,989,000)
Change in Other Noncurrent Assets	(77,310,000)	(60,179,000)
Change in Other Noncurrent Liabilities	(11,019,000)	19,110,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	29,255,000	126,873,000
Fuel, Materials and Supplies	(46,712,000)	129,232,000
Accounts Payable	(135,419,000)	(77,427,000)
Accrued Taxes, Net	(161,613,000)	(197,378,000)
Other Current Assets	2,599,000	12,711,000
Other Current Liabilities	(3,639,000)	(28,093,000)
Net Cash Flows from (Used for) Operating Activities	691,624,000	1,068,452,000
Investing Activities
Construction Expenditures	(374,417,000)	(299,854,000)
Change in Advances to Affiliates, Net	94,852,000	(225,426,000)
Acquisitions of Assets/Businesses	(116,000)	(1,734,000)
Proceeds from Sales of Assets	6,226,000	47,075,000
Other Investing Activities	8,642,000	26,013,000
Net Cash Flows from (Used for) Investing Activities	(264,813,000)	(453,926,000)
Financing Activities
Issuance of Long-term Debt	0	49,757,000
Retirement of Long-term Debt	(194,500,000)	(165,000,000)
Retirement of Cumulative Preferred Stock	0	(2,000)
Principal Payments for Capital Lease Obligations	(7,678,000)	(8,956,000)
Dividends Paid on Common Stock	(225,000,000)	(487,500,000)
Dividends Paid on Cumulative Preferred Stock	0	(549,000)
Other Financing Activities	202,000	18,000
Net Cash Flows from (Used for) Financing Activities	(426,976,000)	(612,232,000)
Net Increase (Decrease) in Cash and Cash Equivalents	(165,000)	2,294,000
Cash and Cash Equivalents at Beginning of Period	2,095,000	949,000
Cash and Cash Equivalents at End of Period	1,930,000	3,243,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	157,944,000	165,600,000
Net Cash Paid (Received) for Income Taxes	33,400,000	103,310,000
Noncash Acquisitions Under Capital Leases	5,658,000	2,198,000
Government Grants Included in Accounts Receivable as of September 30,	585,000	1,539,000
Construction Expenditures Included in Current Liabilities as of September 30,	56,357,000	46,138,000
Public Service Co Of Oklahoma [Member]
Operating Activities
Net Income (Loss)	105,962,000	104,298,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	71,356,000	72,761,000
Deferred Income Taxes	22,524,000	45,927,000
Carrying Costs Income	(1,560,000)	(3,333,000)
Allowance for Equity Funds Used During Construction	(1,298,000)	(839,000)
Mark-to-Market of Risk Management Contracts	3,868,000	(2,226,000)
Fuel Over/Under-Recovery, Net	40,240,000	4,389,000
Change in Other Noncurrent Assets	1,196,000	4,326,000
Change in Other Noncurrent Liabilities	(1,325,000)	22,794,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	10,684,000	53,995,000
Fuel, Materials and Supplies	(2,320,000)	468,000
Accounts Payable	(11,632,000)	3,506,000
Accrued Taxes, Net	43,313,000	63,993,000
Other Current Assets	(1,864,000)	(3,839,000)
Other Current Liabilities	(1,275,000)	11,593,000
Net Cash Flows from (Used for) Operating Activities	277,869,000	377,813,000
Investing Activities
Construction Expenditures	(151,603,000)	(97,038,000)
Change in Advances to Affiliates, Net	(67,583,000)	(105,116,000)
Other Investing Activities	1,107,000	782,000
Net Cash Flows from (Used for) Investing Activities	(218,079,000)	(201,372,000)
Financing Activities
Issuance of Long-term Debt	2,395,000	247,481,000
Change in Advances from Affiliates, Net	0	(91,382,000)
Retirement of Long-term Debt	(130,000)	(275,000,000)
Principal Payments for Capital Lease Obligations	(2,585,000)	(3,103,000)
Dividends Paid on Common Stock	(60,000,000)	(52,500,000)
Dividends Paid on Cumulative Preferred Stock	0	(147,000)
Other Financing Activities	139,000	13,000
Net Cash Flows from (Used for) Financing Activities	(60,181,000)	(174,638,000)
Net Increase (Decrease) in Cash and Cash Equivalents	(391,000)	1,803,000
Cash and Cash Equivalents at Beginning of Period	1,413,000	470,000
Cash and Cash Equivalents at End of Period	1,022,000	2,273,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	36,681,000	23,397,000
Net Cash Paid (Received) for Income Taxes	17,988,000	(26,536,000)
Noncash Acquisitions Under Capital Leases	979,000	634,000
Construction Expenditures Included in Current Liabilities as of September 30,	23,872,000	13,400,000
Southwestern Electric Power Co [Member]
Operating Activities
Net Income (Loss)	180,515,000	168,693,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	103,820,000	99,927,000
Deferred Income Taxes	215,283,000	36,979,000
Asset Impairments and Other Related Charges	13,000,000	0
Allowance for Equity Funds Used During Construction	(43,401,000)	(34,861,000)
Mark-to-Market of Risk Management Contracts	(1,179,000)	(3,148,000)
Fuel Over/Under-Recovery, Net	10,429,000	(30,259,000)
Change in Other Noncurrent Assets	2,355,000	19,606,000
Change in Other Noncurrent Liabilities	25,945,000	32,685,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(15,071,000)	9,718,000
Fuel, Materials and Supplies	(27,911,000)	(10,508,000)
Accounts Payable	(13,474,000)	2,906,000
Accrued Taxes, Net	(24,649,000)	68,674,000
Accrued Interest	(20,473,000)	(22,240,000)
Other Current Assets	(7,940,000)	(3,356,000)
Other Current Liabilities	(12,570,000)	(2,545,000)
Net Cash Flows from (Used for) Operating Activities	384,679,000	332,271,000
Investing Activities
Construction Expenditures	(395,829,000)	(395,193,000)
Change in Advances to Affiliates, Net	(128,227,000)	86,222,000
Other Investing Activities	1,240,000	(3,479,000)
Net Cash Flows from (Used for) Investing Activities	(522,816,000)	(312,450,000)
Financing Activities
Issuance of Long-term Debt	336,429,000	0
Credit Facility Borrowings	21,462,000	32,532,000
Change in Advances from Affiliates, Net	(132,473,000)	41,537,000
Retirement of Long-term Debt	(21,625,000)	(41,135,000)
Retirement of Cumulative Preferred Stock	0	(2,000)
Credit Facility Repayments	(38,478,000)	(38,749,000)
Principal Payments for Capital Lease Obligations	(12,036,000)	(10,029,000)
Dividends Paid on Common Stock	(3,176,000)	(3,183,000)
Dividends Paid on Cumulative Preferred Stock	0	(172,000)
Other Financing Activities	3,859,000	3,650,000
Net Cash Flows from (Used for) Financing Activities	153,962,000	(15,551,000)
Net Increase (Decrease) in Cash and Cash Equivalents	15,825,000	4,270,000
Cash and Cash Equivalents at Beginning of Period	801,000	1,514,000
Cash and Cash Equivalents at End of Period	16,626,000	5,784,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	74,656,000	78,239,000
Net Cash Paid (Received) for Income Taxes	(112,290,000)	(8,586,000)
Noncash Acquisitions Under Capital Leases	18,560,000	10,296,000
Construction Expenditures Included in Current Liabilities as of September 30,	$ 72,318,000	$ 99,600,000

Future cash outflow to pay for acquired nuclear fuel.

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The expense charged against earnings for the periodic recognition of nuclear fuel usage.

+ References

No definition available.

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Income recorded to accrue a return on certain regulatory assets as granted by a regulator.

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No definition available.

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Change in investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy.

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The net cash inflow or outflow due to Cook Unit 1 & 2 refueling outage levelization.

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No definition available.

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Deferral of storm costs incurred.

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- Definition

Future cash inflow for nuclear fuel dry cask storage reimbursement from the DOE.

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No definition available.

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The net change during the reporting period in the value of the asset (liability) created by an (over) under recovery of fuel costs. An over recovery represents the excess of fuel revenues billed to customers over fuel costs incurred and an under recovery represents excess fuel costs incurred over fuel revenues billed to customers.

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Future cash inflow for construction reimbursement from the DOE under the ARRA grant.

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No definition available.

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Noncash acquisition of City of Fort Wayne property through issuance of Other Long-term Debt.

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No definition available.

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The amount of amortization charged against earnings during the period for deferred property taxes.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 270

-SubTopic 10

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Reference 5: http://www.xbrl.org/2003/role/presentationRef

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-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Name Accounting Standards Codification

-Topic 270

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The net cash inflow or outflow from investing activity.

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The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

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