Condensed Consolidated Statements of Cash Flows (USD $)	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Operating Activities
Net Income (Loss)	$ 1,137,000,000	$ 1,241,000,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	1,310,000,000	1,353,000,000
Deferred Income Taxes	582,000,000	592,000,000
Asset Impairments and Other Related Charges	298,000,000	13,000,000
Carrying Costs Income	(20,000,000)	(42,000,000)
Allowance for Equity Funds Used During Construction	(51,000,000)	(70,000,000)
Mark-to-Market of Risk Management Contracts	29,000,000	70,000,000
Amortization of Nuclear Fuel	101,000,000	100,000,000
Pension Contributions to Qualified Plan Trust	0	(100,000,000)
Property Taxes	191,000,000	181,000,000
Fuel Over/Under-Recovery, Net	38,000,000	133,000,000
Deferral of Ohio Capacity Costs, Net	(157,000,000)	(22,000,000)
Change in Other Noncurrent Assets	(35,000,000)	(173,000,000)
Change in Other Noncurrent Liabilities	16,000,000	119,000,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	4,000,000	(4,000,000)
Fuel, Materials and Supplies	72,000,000	(169,000,000)
Accounts Payable	(28,000,000)	(135,000,000)
Accrued Taxes, Net	(278,000,000)	(130,000,000)
Other Current Assets	(5,000,000)	(28,000,000)
Other Current Liabilities	(164,000,000)	(17,000,000)
Net Cash Flows from (Used for) Operating Activities	3,040,000,000	2,912,000,000
Investing Activities
Construction Expenditures	(2,481,000,000)	(2,108,000,000)
Change in Other Temporary Investments, Net	53,000,000	19,000,000
Purchases of Investment Securities	(693,000,000)	(745,000,000)
Sales of Investment Securities	635,000,000	699,000,000
Acquisitions of Nuclear Fuel	(110,000,000)	(13,000,000)
Acquisitions of Assets/Businesses	(6,000,000)	(89,000,000)
Insurance Proceeds Related to Cook Plant Fire	72,000,000	0
Proceeds from Sales of Assets	14,000,000	13,000,000
Other Investing Activities	(4,000,000)	(57,000,000)
Net Cash Flows from (Used for) Investing Activities	(2,520,000,000)	(2,281,000,000)
Financing Activities
Issuance of Common Stock, Net	61,000,000	64,000,000
Issuance of Long-term Debt	2,087,000,000	1,600,000,000
Credit Facility Borrowings	17,000,000	21,000,000
Change in Short-term Debt, Net	240,000,000	(417,000,000)
Retirement of Long-term Debt	(2,281,000,000)	(904,000,000)
Credit Facility Repayments	(20,000,000)	(38,000,000)
Principal Payments for Capital Lease Obligations	(53,000,000)	(53,000,000)
Dividends Paid on Common Stock	(709,000,000)	(687,000,000)
Other Financing Activities	6,000,000	5,000,000
Net Cash Flows from (Used for) Financing Activities	(652,000,000)	(409,000,000)
Net Increase (Decrease) in Cash and Cash Equivalents	(132,000,000)	222,000,000
Cash and Cash Equivalents at Beginning of Period	279,000,000	221,000,000
Cash and Cash Equivalents at End of Period	147,000,000	443,000,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	702,000,000	698,000,000
Net Cash Paid (Received) for Income Taxes	(64,000,000)	(44,000,000)
Noncash Acquisitions Under Capital Leases	53,000,000	46,000,000
Construction Expenditures Included in Current Liabilities as of September 30,	363,000,000	325,000,000
Acquisition of Nuclear Fuel Included in Current Liabilities as of September 30,	0	43,000,000
Noncash Assumption of Liabilities Related to Acquisitions	0	56,000,000
Appalachian Power Co [Member]
Operating Activities
Net Income (Loss)	163,035,000	200,834,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	255,656,000	252,188,000
Deferred Income Taxes	89,501,000	84,850,000
Carrying Costs Income	(6,029,000)	(17,202,000)
Deferral of Storm Costs	34,364,000	(57,638,000)
Allowance for Equity Funds Used During Construction	(2,809,000)	(960,000)
Mark-to-Market of Risk Management Contracts	9,409,000	10,284,000
Property Taxes	21,940,000	20,056,000
Fuel Over/Under-Recovery, Net	46,009,000	61,404,000
Change in Other Noncurrent Assets	(19,784,000)	(35,501,000)
Change in Other Noncurrent Liabilities	10,199,000	7,155,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	62,363,000	94,528,000
Fuel, Materials and Supplies	5,094,000	(44,007,000)
Accounts Payable	(76,665,000)	(27,443,000)
Accrued Taxes, Net	(726,000)	(709,000)
Other Current Assets	1,970,000	1,754,000
Other Current Liabilities	(14,820,000)	12,128,000
Net Cash Flows from (Used for) Operating Activities	578,707,000	561,721,000
Investing Activities
Construction Expenditures	(272,433,000)	(323,866,000)
Change in Advances to Affiliates, Net	(400,000)	(759,000)
Other Investing Activities	103,000	7,880,000
Net Cash Flows from (Used for) Investing Activities	(272,730,000)	(316,745,000)
Financing Activities
Issuance of Long-term Debt	69,346,000	339,396,000
Change in Advances from Affiliates, Net	102,811,000	(80,674,000)
Retirement of Long-term Debt	(345,021,000)	(364,868,000)
Principal Payments for Capital Lease Obligations	(4,049,000)	(4,873,000)
Dividends Paid on Common Stock	(130,000,000)	(135,000,000)
Other Financing Activities	1,490,000	301,000
Net Cash Flows from (Used for) Financing Activities	(305,423,000)	(245,718,000)
Net Increase (Decrease) in Cash and Cash Equivalents	554,000	(742,000)
Cash and Cash Equivalents at Beginning of Period	3,576,000	2,317,000
Cash and Cash Equivalents at End of Period	4,130,000	1,575,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	131,600,000	137,992,000
Net Cash Paid (Received) for Income Taxes	(3,746,000)	10,870,000
Noncash Acquisitions Under Capital Leases	3,440,000	2,338,000
Construction Expenditures Included in Current Liabilities as of September 30,	43,802,000	59,041,000
Indiana Michigan Power Co [Member]
Operating Activities
Net Income (Loss)	142,091,000	108,285,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	131,991,000	109,273,000
Deferred Income Taxes	84,067,000	46,365,000
Amortization (Deferral) of Incremental Nuclear Refueling Outage Expense, Net	(15,450,000)	2,598,000
Allowance for Equity Funds Used During Construction	(15,568,000)	(6,931,000)
Mark-to-Market of Risk Management Contracts	12,995,000	9,882,000
Amortization of Nuclear Fuel	101,316,000	100,435,000
Fuel Over/Under-Recovery, Net	6,459,000	2,867,000
Change in Other Noncurrent Assets	(718,000)	14,214,000
Change in Other Noncurrent Liabilities	25,249,000	46,263,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	23,111,000	25,415,000
Fuel, Materials and Supplies	(9,859,000)	7,315,000
Accounts Payable	(35,517,000)	(75,799,000)
Accrued Taxes, Net	(8,987,000)	7,398,000
Other Current Assets	18,948,000	(3,368,000)
Other Current Liabilities	(4,130,000)	39,541,000
Net Cash Flows from (Used for) Operating Activities	455,998,000	433,753,000
Investing Activities
Construction Expenditures	(360,668,000)	(212,006,000)
Change in Advances to Affiliates, Net	(205,499,000)	(189,054,000)
Purchases of Investment Securities	(675,727,000)	(744,131,000)
Sales of Investment Securities	635,256,000	698,567,000
Acquisitions of Nuclear Fuel	(109,598,000)	(12,545,000)
Insurance Proceeds Related to Cook Plant Fire	72,000,000	0
Other Investing Activities	27,888,000	29,714,000
Net Cash Flows from (Used for) Investing Activities	(616,348,000)	(429,455,000)
Financing Activities
Issuance of Long-term Debt	348,892,000	128,228,000
Retirement of Long-term Debt	(137,544,000)	(78,062,000)
Principal Payments for Capital Lease Obligations	(4,112,000)	(4,929,000)
Dividends Paid on Common Stock	(47,500,000)	(50,000,000)
Other Financing Activities	850,000	212,000
Net Cash Flows from (Used for) Financing Activities	160,586,000	(4,551,000)
Net Increase (Decrease) in Cash and Cash Equivalents	236,000	(253,000)
Cash and Cash Equivalents at Beginning of Period	1,562,000	1,020,000
Cash and Cash Equivalents at End of Period	1,798,000	767,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	76,468,000	79,158,000
Net Cash Paid (Received) for Income Taxes	(35,307,000)	(29,089,000)
Noncash Acquisitions Under Capital Leases	2,858,000	4,993,000
Construction Expenditures Included in Current Liabilities as of September 30,	54,082,000	43,334,000
Acquisition of Nuclear Fuel Included in Current Liabilities as of September 30,	279,000	42,957,000
Expected Reimbursement for Spent Nuclear Fuel Dry Cask Storage	19,000	28,057,000
Ohio Power Co [Member]
Operating Activities
Net Income (Loss)	329,731,000	403,763,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	289,472,000	401,465,000
Deferred Income Taxes	111,850,000	126,009,000
Asset Impairments and Other Related Charges	154,304,000	0
Carrying Costs Income	(9,833,000)	(14,401,000)
Allowance for Equity Funds Used During Construction	(2,853,000)	(3,036,000)
Mark-to-Market of Risk Management Contracts	14,037,000	12,420,000
Property Taxes	166,607,000	164,496,000
Fuel Over/Under-Recovery, Net	21,271,000	4,766,000
Deferral of Ohio Capacity Costs, Net	(156,952,000)	(21,541,000)
Change in Other Noncurrent Assets	(29,012,000)	(55,769,000)
Change in Other Noncurrent Liabilities	(11,664,000)	(11,019,000)
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	123,893,000	29,255,000
Fuel, Materials and Supplies	79,028,000	(46,712,000)
Accounts Payable	(67,487,000)	(135,419,000)
Accrued Taxes, Net	(187,677,000)	(161,613,000)
Other Current Assets	3,246,000	2,599,000
Other Current Liabilities	(39,251,000)	(3,639,000)
Net Cash Flows from (Used for) Operating Activities	788,710,000	691,624,000
Investing Activities
Construction Expenditures	(445,189,000)	(374,417,000)
Change in Advances to Affiliates, Net	101,616,000	94,852,000
Proceeds from Sales of Assets	13,059,000	6,226,000
Other Investing Activities	(8,586,000)	8,526,000
Net Cash Flows from (Used for) Investing Activities	(339,100,000)	(264,813,000)
Financing Activities
Issuance of Long-term Debt	977,002,000	0
Issuance of Long-term Debt - Affiliated	200,000,000	0
Change in Advances from Affiliates, Net	1,063,000	0
Retirement of Long-term Debt	(1,146,000,000)	(194,500,000)
Retirement of Long-term Debt - Affiliated	(200,000,000)	0
Principal Payments for Capital Lease Obligations	(7,920,000)	(7,678,000)
Dividends Paid on Common Stock	(275,000,000)	(225,000,000)
Other Financing Activities	1,946,000	202,000
Net Cash Flows from (Used for) Financing Activities	(448,909,000)	(426,976,000)
Net Increase (Decrease) in Cash and Cash Equivalents	701,000	(165,000)
Cash and Cash Equivalents at Beginning of Period	3,640,000	2,095,000
Cash and Cash Equivalents at End of Period	4,341,000	1,930,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	145,817,000	157,944,000
Net Cash Paid (Received) for Income Taxes	38,446,000	33,400,000
Noncash Acquisitions Under Capital Leases	5,756,000	5,658,000
Government Grants Included in Accounts Receivable as of September 30,	377,000	585,000
Construction Expenditures Included in Current Liabilities as of September 30,	68,481,000	56,357,000
Noncash Distribution of Cook Coal Terminal to Parent	(22,303,000)	0
Public Service Co Of Oklahoma [Member]
Operating Activities
Net Income (Loss)	93,221,000	105,962,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	72,449,000	71,356,000
Deferred Income Taxes	39,665,000	22,524,000
Carrying Costs Income	(338,000)	(1,560,000)
Allowance for Equity Funds Used During Construction	(2,676,000)	(1,298,000)
Mark-to-Market of Risk Management Contracts	(4,984,000)	3,868,000
Property Taxes	(10,177,000)	(9,673,000)
Fuel Over/Under-Recovery, Net	(9,201,000)	40,240,000
Change in Other Noncurrent Assets	(3,175,000)	10,869,000
Change in Other Noncurrent Liabilities	(13,094,000)	(1,325,000)
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	6,454,000	10,684,000
Fuel, Materials and Supplies	3,876,000	(2,320,000)
Accounts Payable	8,783,000	(11,632,000)
Accrued Taxes, Net	37,739,000	43,313,000
Other Current Assets	216,000	(1,864,000)
Other Current Liabilities	(3,780,000)	(1,275,000)
Net Cash Flows from (Used for) Operating Activities	214,978,000	277,869,000
Investing Activities
Construction Expenditures	(172,602,000)	(151,603,000)
Change in Advances to Affiliates, Net	(8,884,000)	(67,583,000)
Other Investing Activities	10,657,000	1,107,000
Net Cash Flows from (Used for) Investing Activities	(170,829,000)	(218,079,000)
Financing Activities
Issuance of Long-term Debt	0	2,395,000
Retirement of Long-term Debt	(301,000)	(130,000)
Principal Payments for Capital Lease Obligations	(2,558,000)	(2,585,000)
Dividends Paid on Common Stock	(41,250,000)	(60,000,000)
Other Financing Activities	593,000	139,000
Net Cash Flows from (Used for) Financing Activities	(43,516,000)	(60,181,000)
Net Increase (Decrease) in Cash and Cash Equivalents	633,000	(391,000)
Cash and Cash Equivalents at Beginning of Period	1,367,000	1,413,000
Cash and Cash Equivalents at End of Period	2,000,000	1,022,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	36,054,000	36,681,000
Net Cash Paid (Received) for Income Taxes	2,026,000	17,988,000
Noncash Acquisitions Under Capital Leases	4,068,000	979,000
Construction Expenditures Included in Current Liabilities as of September 30,	33,820,000	23,872,000
Southwestern Electric Power Co [Member]
Operating Activities
Net Income (Loss)	49,695,000	180,515,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	132,460,000	103,820,000
Deferred Income Taxes	27,736,000	215,283,000
Asset Impairments and Other Related Charges	110,850,000	13,000,000
Allowance for Equity Funds Used During Construction	(4,872,000)	(43,401,000)
Mark-to-Market of Risk Management Contracts	(591,000)	(1,179,000)
Property Taxes	(11,804,000)	(10,167,000)
Fuel Over/Under-Recovery, Net	(24,110,000)	10,429,000
Change in Other Noncurrent Assets	21,935,000	12,522,000
Change in Other Noncurrent Liabilities	(10,203,000)	25,945,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(7,384,000)	(15,071,000)
Fuel, Materials and Supplies	8,638,000	(27,911,000)
Accounts Payable	(7,626,000)	(13,474,000)
Accrued Taxes, Net	36,127,000	(24,649,000)
Accrued Interest	(24,752,000)	(20,473,000)
Other Current Assets	(1,483,000)	(7,940,000)
Other Current Liabilities	(13,770,000)	(12,570,000)
Net Cash Flows from (Used for) Operating Activities	280,846,000	384,679,000
Investing Activities
Construction Expenditures	(284,650,000)	(395,829,000)
Change in Advances to Affiliates, Net	135,195,000	(128,227,000)
Other Investing Activities	(383,000)	1,240,000
Net Cash Flows from (Used for) Investing Activities	(149,838,000)	(522,816,000)
Financing Activities
Issuance of Long-term Debt	0	336,429,000
Credit Facility Borrowings	17,091,000	21,462,000
Change in Advances from Affiliates, Net	0	(132,473,000)
Retirement of Long-term Debt	(3,250,000)	(21,625,000)
Credit Facility Repayments	(19,694,000)	(38,478,000)
Principal Payments for Capital Lease Obligations	(13,394,000)	(12,036,000)
Dividends Paid on Common Stock	(93,750,000)	0
Dividends Paid on Common Stock	(3,142,000)	(3,176,000)
Other Financing Activities	746,000	3,859,000
Net Cash Flows from (Used for) Financing Activities	(115,393,000)	153,962,000
Net Increase (Decrease) in Cash and Cash Equivalents	15,615,000	15,825,000
Cash and Cash Equivalents at Beginning of Period	2,036,000	801,000
Cash and Cash Equivalents at End of Period	17,651,000	16,626,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	115,627,000	74,656,000
Net Cash Paid (Received) for Income Taxes	265,000	(112,290,000)
Noncash Acquisitions Under Capital Leases	3,848,000	18,560,000
Construction Expenditures Included in Current Liabilities as of September 30,	$ 44,815,000	$ 72,318,000