Financing Activities (Details) (USD $)	3 Months Ended							3 Months Ended							3 Months Ended				3 Months Ended	1 Months Ended	3 Months Ended								3 Months Ended					3 Months Ended					3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013	Dec. 31, 2013		Mar. 31, 2014 AEP Subsidiaries [Member]	Dec. 31, 2013 AEP Subsidiaries [Member]	Mar. 31, 2014 AEP Subsidiaries [Member] Notes Payable One [Member]	Mar. 31, 2014 AEP Generating Co [Member] Senior Unsecured Notes One [Member]	Mar. 31, 2014 AEP Texas Central Co [Member] Securitization Bonds One [Member]	Mar. 31, 2014 AEP Texas Central Co [Member] Securitization Bonds Two [Member]	Mar. 31, 2014 Appalachian Power Co [Member]	Mar. 31, 2013 Appalachian Power Co [Member]	Dec. 31, 2013 Appalachian Power Co [Member]	Mar. 31, 2014 Appalachian Power Co [Member] Land Note [Member]	Mar. 31, 2014 Indiana Michigan Power Co [Member]	Mar. 31, 2013 Indiana Michigan Power Co [Member]	Dec. 31, 2013 Indiana Michigan Power Co [Member]	Mar. 31, 2014 Indiana Michigan Power Co [Member] Notes Payable One [Member]	Apr. 25, 2014 Indiana Michigan Power Co [Member] Notes Payable One [Member] Subsequent Event [Member]	Mar. 31, 2014 Indiana Michigan Power Co [Member] Notes Payable Two [Member]	Mar. 31, 2014 Indiana Michigan Power Co [Member] Notes Payable Three [Member]	Mar. 31, 2014 Indiana Michigan Power Co [Member] Notes Payable Four [Member]	Mar. 31, 2014 Indiana Michigan Power Co [Member] Long-term Debt [Member]	Mar. 31, 2014 Indiana Michigan Power Co [Member] Long Term Debt Two [Member]	Mar. 31, 2014 Ohio Power Co [Member]	Mar. 31, 2013 Ohio Power Co [Member]	Dec. 31, 2013 Ohio Power Co [Member]	Mar. 31, 2014 Ohio Power Co [Member] Senior Unsecured Notes One [Member]	Mar. 31, 2014 Ohio Power Co [Member] Long-term Debt [Member]	Mar. 31, 2014 Public Service Co Of Oklahoma [Member]	Mar. 31, 2013 Public Service Co Of Oklahoma [Member]	Dec. 31, 2013 Public Service Co Of Oklahoma [Member]	Mar. 31, 2014 Public Service Co Of Oklahoma [Member] Long-term Debt [Member]	Mar. 31, 2014 Public Service Co Of Oklahoma [Member] Long Term Debt Two [Member]	Mar. 31, 2014 Southwestern Electric Power Co [Member]	Mar. 31, 2013 Southwestern Electric Power Co [Member]	Dec. 31, 2013 Southwestern Electric Power Co [Member]	Mar. 31, 2014 Southwestern Electric Power Co [Member] Notes Payable Two [Member]	Mar. 31, 2014 Transource Missouri [Member] Long-term Debt [Member]
Long-term Debt
Senior Unsecured Notes	$ 11,571,000,000			$ 11,799,000,000
Pollution Control Bonds	1,932,000,000			1,932,000,000
Notes Payable	342,000,000			369,000,000
Securitization Bonds	2,574,000,000			2,686,000,000
Spent Nuclear Fuel Obligation	265,000,000	[1]		265,000,000	[1]
Other Long-term Debt	1,434,000,000			1,360,000,000
Fair Value of Interest Rate Hedges	(7,000,000)			(9,000,000)
Unamortized Discount, Net	(24,000,000)			(25,000,000)
Total Long-term Debt Outstanding	18,087,000,000			18,377,000,000								4,194,516,000		4,194,357,000		2,012,844,000		2,039,016,000								2,510,285,000		2,735,175,000			1,049,793,000		999,810,000			2,041,796,000		2,043,332,000
Long-term Debt Due Within One Year	1,612,000,000			1,549,000,000		449,000,000	416,000,000					553,399,000		342,360,000		287,598,000		294,845,000								235,785,000		438,595,000			34,118,000		34,115,000			56,750,000		3,250,000
Long-term Debt	16,475,000,000			16,828,000,000		2,388,000,000	2,532,000,000					3,555,117,000		3,765,997,000		1,725,246,000		1,744,171,000								2,274,500,000		2,296,580,000			1,015,675,000		965,695,000			1,985,046,000		2,040,082,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Issuances	77,000,000	[2]																																50,000,000						27,000,000
Retirements and Principal Payments	370,000,000		858,000,000					1,000,000	4,000,000	72,000,000	40,000,000	8,000	7,000		8,000	26,337,000	24,864,000		9,866,000	13,000,000	5,324,000	5,214,000	3,611,000	2,063,000	259,000	225,029,000	500,000,000		225,000,000	29,000	102,000	99,000			102,000	1,625,000	1,625,000		1,625,000
Interest Rate (Percentage)									6.33%	5.09%	6.25%				13.718%								2.12%		6.00%				4.85%	1.149%					3.00%				4.58%
Interest Rate (Variable)								Variable											Variable		Variable	Variable		Variable										Variable						Variable
Due Date								2017	2037	2015	2016				2026				2017		2016	2016	2016	2015	2025				2014	2028				2016	2027				2032	2018
Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits
Maximum Borrowings from Utility Money Pool												0				0										55,640,000					121,100,000					130,258,000
Maximum Loans to Utility Money Pool												249,630,000				158,857,000										405,350,000					0					0
Average Borrowings from Utility Money Pool												0				0										25,930,000					58,500,000					61,132,000
Average Loans to Utility Money Pool												164,681,000				92,303,000										135,747,000					0					0
Net Loans (Borrowings) to/from Utility Money Pool												245,516,000				59,162,000										(27,108,000)					(70,119,000)					(117,342,000)
Authorized Short-term Borrowing Limit												600,000,000				500,000,000										600,000,000					300,000,000					350,000,000
Maximum and Minimum Interest Rates
Maximum Interest Rate												0.33%	0.43%			0.33%	0.43%									0.33%	0.43%				0.33%	0.43%				0.33%	0.43%
Minimum Interest Rate												0.28%	0.35%			0.28%	0.35%									0.28%	0.35%				0.28%	0.35%				0.28%	0.35%
Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool
Average Interest Rate for Funds Borrowed												0.00%	0.38%			0.00%	0.36%									0.31%	0.36%				0.31%	0.36%				0.31%	0.00%
Average Interest Rate for Funds Loaned												0.31%	0.37%			0.31%	0.37%									0.29%	0.37%				0.00%	0.38%				0.00%	0.38%
Short-term Debt:
Securitized Debt for Receivables	700,000,000	[3]		700,000,000	[3]
Commercial Paper	632,000,000			57,000,000
Total Short-term Debt	1,332,000,000			757,000,000
Securitized Debt for Receivables	0.24%	[4]		0.23%	[4]
Commercial Paper	0.31%	[4]		0.29%	[4]
Comparative Accounts Receivable Information
Effective Interest Rates on Securitization of Accounts Receivable	0.24%		0.23%
Net Uncollectible Accounts Receivable Written Off	8,000,000		7,000,000
Customer Accounts Receivable Managed Portfolio
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts	997,000,000			929,000,000
Total Principal Outstanding	700,000,000			700,000,000
Delinquent Securitized Accounts Receivable	55,000,000			45,000,000
Bad Debt Reserves Related to Securitization, Sale of Accounts Receivable	17,000,000			16,000,000
Unbilled Receivables Related to Securitization, Sale of Accounts Receivable	278,000,000			331,000,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues												175,738,000		156,599,000		154,510,000		139,257,000								350,735,000		324,287,000			111,522,000		115,260,000			145,648,000		149,337,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold												2,423,000	1,556,000			2,040,000	1,452,000									7,498,000	4,669,000				1,323,000	1,414,000				1,566,000	1,380,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit												437,196,000	398,193,000			407,150,000	351,830,000									686,627,000	696,958,000				290,217,000	240,275,000				390,588,000	331,936,000
Financing Activities (Textuals) [Abstract]
Reacquired Pollution Controls Bonds Held by Trustees	500,000,000															40,000,000										460,000,000
Maximum Percentage Debt to Capitalization	67.50%											67.50%				67.50%															67.50%
Commitment from Bank Conduits that Expire in One Year	385,000,000
Commitment from Bank Conduits that Expire in Two Years	315,000,000
Total Commitment from Bank Conduits to Finance Receivables	700,000,000
Trust Fund Assets One Time Fee Obligation for Nuclear Fuel Disposition	$ 309,000,000			$ 309,000,000

[1] Pursuant to the Nuclear Waste Policy Act of 1982, I&M, a nuclear licensee, has an obligation to the United States Department of Energy for spent nuclear fuel disposal. The obligation includes a one-time fee for nuclear fuel consumed prior to April 7, 1983. Trust fund assets related to this obligation were $309 million and $309 million as of March 31, 2014 and December 31, 2013, respectively, and are included in Spent Nuclear Fuel and Decommissioning Trusts on our condensed balance sheets.

[2] Amount indicated on the statement of cash flows is net of issuance costs and premium or discount and will not tie to the total issuances.

[3] Amount of securitized debt for receivables as accounted for under the ''Transfers and Servicing'' accounting guidance.

[4] Weighted average rate.