Condensed Consolidated Statements of Cash Flows (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating Activities
Net Income (Loss)	$ 561,000,000	$ 364,000,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	491,000,000	420,000,000
Deferred Income Taxes	299,000,000	246,000,000
Carrying Costs Income	(6,000,000)	(4,000,000)
Allowance for Equity Funds Used During Construction	(22,000,000)	(15,000,000)
Mark-to-Market of Risk Management Contracts	6,000,000	34,000,000
Amortization of Nuclear Fuel	38,000,000	34,000,000
Property Taxes	(54,000,000)	(51,000,000)
Fuel Over/Under-Recovery, Net	(137,000,000)	(4,000,000)
Deferral of Ohio Capacity Costs, Net	(56,000,000)	(49,000,000)
Change in Other Noncurrent Assets	(25,000,000)	36,000,000
Change in Other Noncurrent Liabilities	77,000,000	17,000,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(83,000,000)	(4,000,000)
Fuel, Materials and Supplies	209,000,000	(1,000,000)
Accounts Payable	33,000,000	(3,000,000)
Accrued Taxes, Net	(16,000,000)	(69,000,000)
Other Current Assets	(51,000,000)	(16,000,000)
Other Current Liabilities	(131,000,000)	(179,000,000)
Net Cash Flows from (Used for) Operating Activities	1,133,000,000	756,000,000
Investing Activities
Construction Expenditures	(907,000,000)	(843,000,000)
Change in Other Temporary Investments, Net	44,000,000	75,000,000
Purchases of Investment Securities	(165,000,000)	(196,000,000)
Sales of Investment Securities	148,000,000	168,000,000
Acquisitions of Nuclear Fuel	(49,000,000)	(47,000,000)
Acquisitions of Assets/Businesses	(43,000,000)	(2,000,000)
Insurance Proceeds Related to Cook Plant Fire	0	72,000,000
Other Investing Activities	(9,000,000)	1,000,000
Net Cash Flows from (Used for) Investing Activities	(981,000,000)	(772,000,000)
Financing Activities
Issuance of Common Stock, Net	15,000,000	15,000,000
Issuance of Long-term Debt	76,000,000	671,000,000
Credit Facility Borrowings	0	17,000,000
Change in Short-term Debt, Net	575,000,000	329,000,000
Retirement of Long-term Debt	(370,000,000)	(858,000,000)
Credit Facility Repayments	0	(20,000,000)
Principal Payments for Capital Lease Obligations	(33,000,000)	(16,000,000)
Dividends Paid on Common Stock	(245,000,000)	(230,000,000)
Other Financing Activities	4,000,000	8,000,000
Net Cash Flows from (Used for) Financing Activities	22,000,000	(84,000,000)
Net Increase (Decrease) in Cash and Cash Equivalents	174,000,000	(100,000,000)
Cash and Cash Equivalents at Beginning of Period	118,000,000	279,000,000
Cash and Cash Equivalents at End of Period	292,000,000	179,000,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	234,000,000	253,000,000
Net Cash Paid (Received) for Income Taxes	(6,000,000)	(19,000,000)
Noncash Acquisitions Under Capital Leases	20,000,000	24,000,000
Construction Expenditures Included in Current Liabilities as of March 31,	387,000,000	300,000,000
Appalachian Power Co [Member]
Operating Activities
Net Income (Loss)	101,851,000	70,548,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	104,586,000	87,903,000
Deferred Income Taxes	65,690,000	17,185,000
Carrying Costs Income	1,875,000	(103,000)
Allowance for Equity Funds Used During Construction	(1,235,000)	(770,000)
Mark-to-Market of Risk Management Contracts	1,625,000	9,404,000
Fuel Over/Under-Recovery, Net	(102,051,000)	20,135,000
Change in Other Noncurrent Assets	4,959,000	28,314,000
Change in Other Noncurrent Liabilities	7,799,000	5,634,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	41,382,000	7,238,000
Fuel, Materials and Supplies	88,057,000	(8,726,000)
Accounts Payable	(4,314,000)	(20,597,000)
Accrued Taxes, Net	929,000	30,197,000
Other Current Assets	(7,276,000)	642,000
Other Current Liabilities	(6,707,000)	(10,917,000)
Net Cash Flows from (Used for) Operating Activities	297,170,000	236,087,000
Investing Activities
Construction Expenditures	(112,824,000)	(110,552,000)
Change in Advances to Affiliates, Net	(153,031,000)	(179,000)
Other Investing Activities	(8,677,000)	(179,000)
Net Cash Flows from (Used for) Investing Activities	(274,532,000)	(110,910,000)
Financing Activities
Issuance of Long-term Debt	(45,000)	(258,000)
Change in Advances from Affiliates, Net	0	(77,314,000)
Retirement of Long-term Debt	(8,000)	(7,000)
Principal Payments for Capital Lease Obligations	(1,559,000)	(1,238,000)
Dividends Paid on Common Stock	(20,000,000)	(50,000,000)
Other Financing Activities	987,000	1,320,000
Net Cash Flows from (Used for) Financing Activities	(20,625,000)	(127,497,000)
Net Increase (Decrease) in Cash and Cash Equivalents	2,013,000	(2,320,000)
Cash and Cash Equivalents at Beginning of Period	2,745,000	3,576,000
Cash and Cash Equivalents at End of Period	4,758,000	1,256,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	39,431,000	31,018,000
Net Cash Paid (Received) for Income Taxes	0	231,000
Noncash Acquisitions Under Capital Leases	2,657,000	1,548,000
Construction Expenditures Included in Current Liabilities as of March 31,	38,972,000	35,733,000
Indiana Michigan Power Co [Member]
Operating Activities
Net Income (Loss)	87,089,000	43,457,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	50,031,000	40,902,000
Deferred Income Taxes	21,017,000	26,791,000
Amortization (Deferral) of Incremental Nuclear Refueling Outage Expense, Net	14,821,000	(5,840,000)
Allowance for Equity Funds Used During Construction	(3,964,000)	(5,646,000)
Mark-to-Market of Risk Management Contracts	426,000	9,238,000
Amortization of Nuclear Fuel	38,049,000	34,000,000
Fuel Over/Under-Recovery, Net	11,683,000	417,000
Change in Other Noncurrent Assets	(16,211,000)	(9,217,000)
Change in Other Noncurrent Liabilities	11,505,000	8,577,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	24,411,000	22,531,000
Fuel, Materials and Supplies	7,340,000	(6,868,000)
Accounts Payable	(20,902,000)	(31,801,000)
Accrued Taxes, Net	29,583,000	14,198,000
Other Current Assets	5,933,000	8,487,000
Other Current Liabilities	(18,862,000)	(13,443,000)
Net Cash Flows from (Used for) Operating Activities	241,949,000	135,783,000
Investing Activities
Construction Expenditures	(117,807,000)	(153,262,000)
Change in Advances to Affiliates, Net	(3,299,000)	(205,008,000)
Purchases of Investment Securities	(164,511,000)	(184,299,000)
Sales of Investment Securities	147,700,000	167,670,000
Acquisitions of Nuclear Fuel	(49,420,000)	(46,739,000)
Insurance Proceeds Related to Cook Plant Fire	0	72,000,000
Other Investing Activities	8,860,000	3,077,000
Net Cash Flows from (Used for) Investing Activities	(178,477,000)	(346,561,000)
Financing Activities
Issuance of Long-term Debt	0	247,771,000
Retirement of Long-term Debt	(26,337,000)	(24,864,000)
Principal Payments for Capital Lease Obligations	(11,569,000)	(1,265,000)
Dividends Paid on Common Stock	(25,000,000)	(12,500,000)
Other Financing Activities	405,000	646,000
Net Cash Flows from (Used for) Financing Activities	(62,501,000)	209,788,000
Net Increase (Decrease) in Cash and Cash Equivalents	971,000	(990,000)
Cash and Cash Equivalents at Beginning of Period	1,317,000	1,562,000
Cash and Cash Equivalents at End of Period	2,288,000	572,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	34,592,000	30,116,000
Net Cash Paid (Received) for Income Taxes	0	(8,007,000)
Noncash Acquisitions Under Capital Leases	2,406,000	1,355,000
Construction Expenditures Included in Current Liabilities as of March 31,	56,668,000	42,430,000
Acquisition of Nuclear Fuel Included in Current Liabilities as of March 31,	116,000	1,485,000
Expected Reimbursement for Spent Nuclear Fuel Dry Cask Storage	854,000	0
Ohio Power Co [Member]
Operating Activities
Net Income (Loss)	60,774,000	129,774,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	58,699,000	92,324,000
Amortization of Generation Deferrals	31,186,000	0
Deferred Income Taxes	24,917,000	55,328,000
Carrying Costs Income	(7,114,000)	(3,263,000)
Allowance for Equity Funds Used During Construction	(1,726,000)	(1,304,000)
Mark-to-Market of Risk Management Contracts	(1,060,000)	12,901,000
Property Taxes	48,743,000	55,246,000
Fuel Over/Under-Recovery, Net	12,265,000	9,191,000
Deferral of Ohio Capacity Costs, Net	(56,167,000)	(49,056,000)
Change in Other Noncurrent Assets	(21,285,000)	14,092,000
Change in Other Noncurrent Liabilities	29,277,000	1,730,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	(34,984,000)	58,235,000
Fuel, Materials and Supplies	(1,600,000)	(1,388,000)
Accounts Payable	(30,911,000)	(42,749,000)
Accrued Taxes, Net	(98,147,000)	(91,308,000)
Other Current Assets	(1,415,000)	(705,000)
Other Current Liabilities	(13,633,000)	(21,374,000)
Net Cash Flows from (Used for) Operating Activities	(2,181,000)	217,674,000
Investing Activities
Construction Expenditures	(100,220,000)	(131,590,000)
Change in Restricted Cash for Securitized Funding	(12,668,000)	0
Change in Advances to Affiliates, Net	339,070,000	106,080,000
Other Investing Activities	1,162,000	9,760,000
Net Cash Flows from (Used for) Investing Activities	227,344,000	(15,750,000)
Financing Activities
Issuance of Long-term Debt - Affiliated	0	200,000,000
Change in Advances from Affiliates, Net	27,108,000	172,211,000
Retirement of Long-term Debt	(225,029,000)	(500,000,000)
Principal Payments for Capital Lease Obligations	(1,396,000)	(2,508,000)
Dividends Paid on Common Stock	(25,000,000)	(75,000,000)
Other Financing Activities	930,000	760,000
Net Cash Flows from (Used for) Financing Activities	(223,387,000)	(204,537,000)
Net Increase (Decrease) in Cash and Cash Equivalents	1,776,000	(2,613,000)
Cash and Cash Equivalents at Beginning of Period	3,004,000	3,640,000
Cash and Cash Equivalents at End of Period	4,780,000	1,027,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	23,425,000	50,327,000
Net Cash Paid (Received) for Income Taxes	0	(2,390,000)
Noncash Acquisitions Under Capital Leases	3,324,000	1,811,000
Government Grants Included in Accounts Receivable as of March 31,	0	1,147,000
Construction Expenditures Included in Current Liabilities as of March 31,	46,910,000	69,152,000
Public Service Co Of Oklahoma [Member]
Operating Activities
Net Income (Loss)	8,448,000	13,693,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	23,982,000	24,180,000
Deferred Income Taxes	19,178,000	20,242,000
Allowance for Equity Funds Used During Construction	(1,431,000)	(980,000)
Mark-to-Market of Risk Management Contracts	(267,000)	(3,013,000)
Property Taxes	(31,260,000)	(28,730,000)
Fuel Over/Under-Recovery, Net	(23,394,000)	(17,812,000)
Change In Regulatory Assets	(8,468,000)	4,165,000
Change in Other Noncurrent Assets	(1,045,000)	(3,780,000)
Change in Other Noncurrent Liabilities	(2,204,000)	4,620,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	14,193,000	1,665,000
Fuel, Materials and Supplies	149,000	1,344,000
Accounts Payable	(16,891,000)	(5,827,000)
Accrued Taxes, Net	7,362,000	6,106,000
Other Current Assets	(395,000)	1,181,000
Other Current Liabilities	22,401,000	10,663,000
Net Cash Flows from (Used for) Operating Activities	10,358,000	27,717,000
Investing Activities
Construction Expenditures	(93,500,000)	(54,298,000)
Change in Advances to Affiliates, Net	0	10,558,000
Other Investing Activities	776,000	5,196,000
Net Cash Flows from (Used for) Investing Activities	(92,724,000)	(38,544,000)
Financing Activities
Issuance of Long-term Debt	49,975,000	0
Change in Advances from Affiliates, Net	33,347,000	24,004,000
Retirement of Long-term Debt	(102,000)	(99,000)
Principal Payments for Capital Lease Obligations	(941,000)	(754,000)
Dividends Paid on Common Stock	0	(13,750,000)
Other Financing Activities	566,000	533,000
Net Cash Flows from (Used for) Financing Activities	82,845,000	9,934,000
Net Increase (Decrease) in Cash and Cash Equivalents	479,000	(893,000)
Cash and Cash Equivalents at Beginning of Period	1,277,000	1,367,000
Cash and Cash Equivalents at End of Period	1,756,000	474,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	10,487,000	10,519,000
Net Cash Paid (Received) for Income Taxes	67,000	284,000
Noncash Acquisitions Under Capital Leases	904,000	1,015,000
Construction Expenditures Included in Current Liabilities as of March 31,	34,199,000	19,868,000
Southwestern Electric Power Co [Member]
Operating Activities
Net Income (Loss)	22,962,000	11,548,000
Adjustments to Reconcile Net Income to Net Cash Flows from (Used for) Operating Activities:
Depreciation and Amortization	45,661,000	44,882,000
Deferred Income Taxes	11,351,000	25,583,000
Allowance for Equity Funds Used During Construction	(2,081,000)	(1,024,000)
Mark-to-Market of Risk Management Contracts	(825,000)	(293,000)
Property Taxes	(37,511,000)	(36,161,000)
Fuel Over/Under-Recovery, Net	(21,651,000)	(7,496,000)
Change in Other Noncurrent Assets	3,963,000	(1,245,000)
Change in Other Noncurrent Liabilities	2,914,000	4,953,000
Changes in Certain Components of Working Capital:
Accounts Receivable, Net	13,614,000	11,654,000
Fuel, Materials and Supplies	5,102,000	3,303,000
Accounts Payable	(9,410,000)	(12,658,000)
Customer Deposits	690,000	(14,202,000)
Accrued Taxes, Net	42,596,000	27,994,000
Accrued Interest	(25,431,000)	(25,447,000)
Other Current Assets	(4,663,000)	(638,000)
Other Current Liabilities	(18,813,000)	(13,551,000)
Net Cash Flows from (Used for) Operating Activities	28,468,000	17,202,000
Investing Activities
Construction Expenditures	(105,165,000)	(97,786,000)
Change in Advances to Affiliates, Net	0	126,944,000
Other Investing Activities	1,046,000	(1,108,000)
Net Cash Flows from (Used for) Investing Activities	(104,119,000)	28,050,000
Financing Activities
Credit Facility Borrowings	0	17,091,000
Change in Advances from Affiliates, Net	108,162,000	0
Retirement of Long-term Debt	(1,625,000)	(1,625,000)
Credit Facility Repayments	0	(19,694,000)
Principal Payments for Capital Lease Obligations	(4,470,000)	(4,225,000)
Dividends Paid on Common Stock	(25,000,000)	(31,250,000)
Dividends Paid on Common Stock	(1,236,000)	(964,000)
Other Financing Activities	574,000	522,000
Net Cash Flows from (Used for) Financing Activities	76,405,000	(40,145,000)
Net Increase (Decrease) in Cash and Cash Equivalents	754,000	5,107,000
Cash and Cash Equivalents at Beginning of Period	17,241,000	2,036,000
Cash and Cash Equivalents at End of Period	17,995,000	7,143,000
Supplementary Information
Cash Paid for Interest, Net of Capitalized Amounts	55,123,000	55,626,000
Net Cash Paid (Received) for Income Taxes	734,000	(8,387,000)
Noncash Acquisitions Under Capital Leases	2,824,000	2,454,000
Construction Expenditures Included in Current Liabilities as of March 31,	$ 53,628,000	$ 40,990,000