Financing Activities (Details) (USD $)	3 Months Ended			6 Months Ended							6 Months Ended					1 Months Ended	6 Months Ended					3 Months Ended		6 Months Ended			6 Months Ended					3 Months Ended		6 Months Ended			6 Months Ended	1 Months Ended	6 Months Ended									3 Months Ended		6 Months Ended			1 Months Ended	6 Months Ended				3 Months Ended		6 Months Ended			6 Months Ended				3 Months Ended		6 Months Ended			6 Months Ended	1 Months Ended	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013	Jun. 30, 2014		Jun. 30, 2013	Dec. 31, 2013		Jun. 30, 2014 AEP Subsidiaries [Member]	Dec. 31, 2013 AEP Subsidiaries [Member]	Jun. 30, 2014 AEP Subsidiaries [Member] Notes Payable One [Member]	Jun. 30, 2014 AEP Subsidiaries [Member] Notes Payable Two [Member]	Jun. 30, 2014 AEP Subsidiaries [Member] Notes Payable Three [Member]	Jun. 30, 2014 AEP Generating Co [Member] Senior Unsecured Notes One [Member]	Jun. 30, 2014 AEP Texas Central Co [Member] Securitization Bonds One [Member]	Jul. 25, 2014 AEP Texas Central Co [Member] Securitization Bonds One [Member] Subsequent Event [Member]	Jun. 30, 2014 AEP Texas Central Co [Member] Securitization Bonds Two [Member]	Jun. 30, 2014 AEP Texas Central Co [Member] Securitization Bonds Three [Member]	Jun. 30, 2014 AEP Texas Central Co [Member] Senior Unsecured Notes One [Member]	Jun. 30, 2014 AEP Texas Central Co [Member] Senior Unsecured Notes Two [Member]	Jun. 30, 2014 AEP Texas Central Co [Member] Senior Unsecured Notes Three [Member]	Jun. 30, 2014 Appalachian Power Co [Member]	Jun. 30, 2013 Appalachian Power Co [Member]	Jun. 30, 2014 Appalachian Power Co [Member]	Jun. 30, 2013 Appalachian Power Co [Member]	Dec. 31, 2013 Appalachian Power Co [Member]	Jun. 30, 2014 Appalachian Power Co [Member] Senior Unsecured Notes One [Member]		Jun. 30, 2014 Appalachian Power Co [Member] Senior Unsecured Notes Two [Member]	Jun. 30, 2014 Appalachian Power Co [Member] Long-term Debt [Member]	Jun. 30, 2014 Appalachian Power Co [Member] Land Note [Member]	Jun. 30, 2014 Indiana Michigan Power Co [Member]	Jun. 30, 2013 Indiana Michigan Power Co [Member]	Jun. 30, 2014 Indiana Michigan Power Co [Member]	Jun. 30, 2013 Indiana Michigan Power Co [Member]	Dec. 31, 2013 Indiana Michigan Power Co [Member]	Jun. 30, 2014 Indiana Michigan Power Co [Member] Notes Payable One [Member]	Jul. 25, 2014 Indiana Michigan Power Co [Member] Notes Payable One [Member] Subsequent Event [Member]	Jun. 30, 2014 Indiana Michigan Power Co [Member] Notes Payable Two [Member]	Jun. 30, 2014 Indiana Michigan Power Co [Member] Notes Payable Three [Member]	Jun. 30, 2014 Indiana Michigan Power Co [Member] Notes Payable Four [Member]	Jun. 30, 2014 Indiana Michigan Power Co [Member] Notes Payable Five [Member]	Jun. 30, 2014 Indiana Michigan Power Co [Member] Pollution Control Bonds One [Member]		Jun. 30, 2014 Indiana Michigan Power Co [Member] Pollution Control Bonds Two [Member]	Jun. 30, 2014 Indiana Michigan Power Co [Member] Long-term Debt [Member]	Jun. 30, 2014 Indiana Michigan Power Co [Member] Long Term Debt Two [Member]	Jun. 30, 2014 Ohio Power Co [Member]	Jun. 30, 2013 Ohio Power Co [Member]	Jun. 30, 2014 Ohio Power Co [Member]	Jun. 30, 2013 Ohio Power Co [Member]	Dec. 31, 2013 Ohio Power Co [Member]	Jul. 25, 2014 Ohio Power Co [Member] Securitization Bonds One [Member] Subsequent Event [Member]	Jun. 30, 2014 Ohio Power Co [Member] Pollution Control Bonds One [Member]	Jun. 30, 2014 Ohio Power Co [Member] Pollution Control Bonds Two [Member]	Jun. 30, 2014 Ohio Power Co [Member] Senior Unsecured Notes One [Member]	Jun. 30, 2014 Ohio Power Co [Member] Long-term Debt [Member]	Jun. 30, 2014 Public Service Co Of Oklahoma [Member]	Jun. 30, 2013 Public Service Co Of Oklahoma [Member]	Jun. 30, 2014 Public Service Co Of Oklahoma [Member]	Jun. 30, 2013 Public Service Co Of Oklahoma [Member]	Dec. 31, 2013 Public Service Co Of Oklahoma [Member]	Jun. 30, 2014 Public Service Co Of Oklahoma [Member] Pollution Control Bonds One [Member]	Jun. 30, 2014 Public Service Co Of Oklahoma [Member] Long-term Debt [Member]		Jun. 30, 2014 Public Service Co Of Oklahoma [Member] Long Term Debt Two [Member]	Jun. 30, 2014 Southwestern Electric Power Co [Member]	Jun. 30, 2013 Southwestern Electric Power Co [Member]	Jun. 30, 2014 Southwestern Electric Power Co [Member]	Jun. 30, 2013 Southwestern Electric Power Co [Member]	Dec. 31, 2013 Southwestern Electric Power Co [Member]	Jun. 30, 2014 Southwestern Electric Power Co [Member] Notes Payable One [Member]	Jul. 25, 2014 Southwestern Electric Power Co [Member] Long-term Debt [Member] Subsequent Event [Member]	Jun. 30, 2014 AEP Transmission Company, LLC [Member] Senior Unsecured Notes One [Member]	Jun. 30, 2014 Kentucky Power Co [Member] Pollution Control Bonds One [Member]		Jun. 30, 2014 Transource Missouri [Member] Long-term Debt [Member]	Jun. 30, 2014 AEP Generation Resources [Member] Pollution Control Bonds One [Member]	Jun. 30, 2014 AEP Generation Resources [Member] Pollution Control Bonds Two [Member]
Long-term Debt
Senior Unsecured Notes	$ 11,901,000,000			$ 11,901,000,000			$ 11,799,000,000
Pollution Control Bonds	1,963,000,000			1,963,000,000			1,932,000,000
Notes Payable	310,000,000			310,000,000			369,000,000
Securitization Bonds	2,547,000,000			2,547,000,000			2,686,000,000
Spent Nuclear Fuel Obligation	265,000,000	[1]		265,000,000	[1]		265,000,000	[1]
Other Long-term Debt	1,169,000,000			1,169,000,000			1,360,000,000
Fair Value of Interest Rate Hedges	(5,000,000)			(5,000,000)			(9,000,000)
Unamortized Discount, Net	(25,000,000)			(25,000,000)			(25,000,000)
Total Long-term Debt Outstanding	18,125,000,000			18,125,000,000			18,377,000,000															3,992,617,000		3,992,617,000		4,194,357,000						1,979,041,000		1,979,041,000		2,039,016,000												2,370,952,000		2,370,952,000		2,735,175,000						1,041,075,000		1,041,075,000		999,810,000					2,041,885,000		2,041,885,000		2,043,332,000
Long-term Debt Due Within One Year	2,524,000,000			2,524,000,000			1,549,000,000		434,000,000	416,000,000												653,400,000		653,400,000		342,360,000						260,728,000		260,728,000		294,845,000												182,335,000		182,335,000		438,595,000						421,000		421,000		34,115,000					156,750,000		156,750,000		3,250,000
Long-term Debt	15,601,000,000			15,601,000,000			16,828,000,000		2,359,000,000	2,532,000,000												3,253,217,000		3,253,217,000		3,765,997,000						1,718,313,000		1,718,313,000		1,744,171,000												2,188,617,000		2,188,617,000		2,296,580,000						1,040,654,000		1,040,654,000		965,695,000					1,885,135,000		1,885,135,000		2,040,082,000
Long-term Debt and Other Securities Issued, Retired and Principal Payments Made
Issuances				948,000,000	[2]														50,000,000	50,000,000	100,000,000						300,000,000	[3]															100,000,000	[3]																				75,000,000	[3]								100,000,000	30,000,000	65,000,000	[4]	39,000,000	79,000,000	60,000,000	[4]
Retirements and Principal Payments				1,205,000,000		1,073,000,000					1,000,000	1,000,000	1,000,000	4,000,000	72,000,000	112,000,000	40,000,000	26,000,000						500,016,000	14,000				200,000,000	300,000,000	16,000			160,292,000	103,793,000		19,410,000	9,000,000	13,782,000	10,258,000	7,105,000	4,402,000			100,000,000	4,813,000	522,000			364,498,000	606,000,000		35,000,000	79,450,000	60,000,000	225,000,000	48,000			33,906,000	200,000		33,700,000			206,000			1,625,000	1,625,000		1,625,000
Interest Rate (Percentage)												8.03%	7.59%	6.33%	5.09%		6.25%	0.88%	2.61%	3.81%	4.67%						4.40%		4.95%		13.718%										2.12%	4.00%	1.75%		6.25%		6.00%							3.25%	3.875%	4.85%	1.149%						5.25%			3.00%						4.58%		5.42%
Interest Rate (Variable)											Variable																			Variable							Variable		Variable	Variable						Variable																		Variable											Variable		Variable	Variable	Variable
Due Date											2017	2026	2026	2037	2015		2016	2017	2019	2026	2044						2044		2015	2015	2026						2017		2016	2016	2016	2014	2018		2014	2015	2025							2014	2014	2014	2028						2014	2016		2027						2032		2044	2036		2018	2015	2038
Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits
Maximum Borrowings from Utility Money Pool																								44,215,000										68,332,000																120,264,000										176,950,000									153,503,000
Maximum Loans to Utility Money Pool																								542,186,000										158,857,000																405,350,000										0									0
Average Borrowings from Utility Money Pool																								15,653,000										38,811,000																35,792,000										87,805,000									92,467,000
Average Loans to Utility Money Pool																								153,179,000										65,075,000																114,371,000										0									0
Net Loans (Borrowings) to/from Utility Money Pool																						28,794,000		28,794,000								(33,847,000)		(33,847,000)														(34,723,000)		(34,723,000)								(124,800,000)		(124,800,000)							(79,098,000)		(79,098,000)
Authorized Short-term Borrowing Limit																								600,000,000										500,000,000																400,000,000										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																								0.24%	0.32%									0.24%	0.32%															0.24%	0.32%									0.24%	0.32%								0.24%	0.32%
Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool
Average Interest Rate for Funds Borrowed																								0.26%	0.36%									0.26%	0.36%															0.27%	0.35%									0.28%	0.34%								0.28%	0.34%
Average Interest Rate for Funds Loaned																								0.29%	0.36%									0.30%	0.35%															0.29%	0.37%									0.00%	0.38%								0.00%	0.37%
Short-term Debt:
Securitized Debt for Receivables	750,000,000	[5]		750,000,000	[5]		700,000,000	[5]
Commercial Paper	732,000,000			732,000,000			57,000,000
Total Short-term Debt	1,482,000,000			1,482,000,000			757,000,000
Securitized Debt for Receivables	0.23%	[6]		0.23%	[6]		0.23%	[6]
Commercial Paper	0.27%	[6]		0.27%	[6]		0.29%	[6]
Comparative Accounts Receivable Information
Effective Interest Rates on Securitization of Accounts Receivable	0.22%		0.22%	0.23%		0.23%
Net Uncollectible Accounts Receivable Written Off	7,000,000		7,000,000	14,000,000		14,000,000
Customer Accounts Receivable Managed Portfolio
Accounts Receivable Retained Interest and Pledged as Collateral Less Uncollectible Accounts	1,040,000,000			1,040,000,000			929,000,000
Total Principal Outstanding	750,000,000			750,000,000			700,000,000
Delinquent Securitized Accounts Receivable	56,000,000			56,000,000			45,000,000
Bad Debt Reserves Related to Securitization, Sale of Accounts Receivable	19,000,000			19,000,000			16,000,000
Unbilled Receivables Related to Securitization, Sale of Accounts Receivable	383,000,000			383,000,000			331,000,000
Accounts Receivable and Accrued Unbilled Revenues
Accounts Receivable and Accrued Unbilled Revenues																						156,930,000		156,930,000		156,599,000						145,273,000		145,273,000		139,257,000												359,370,000		359,370,000		324,287,000						149,600,000		149,600,000		115,260,000					179,617,000		179,617,000		149,337,000
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
Fees Paid to AEP Credit for Customer Accounts Receivable Sold																						2,037,000	1,459,000	4,460,000	3,015,000							1,785,000	1,530,000	3,825,000	2,982,000													6,647,000	4,695,000	14,145,000	9,364,000							1,349,000	1,351,000	2,672,000	2,765,000						1,579,000	1,384,000	3,145,000	2,764,000
Proceeds from Sale of Receivables
Proceeds from Sale of Receivables to AEP Credit																						345,963,000	342,984,000	783,159,000	741,177,000							353,030,000	361,417,000	760,180,000	713,247,000													626,025,000	661,959,000	1,312,652,000	1,358,917,000							325,536,000	321,620,000	615,753,000	561,895,000						420,909,000	389,076,000	811,497,000	721,012,000
Financing Activities (Textuals) [Abstract]
Reacquired Pollution Controls Bonds Held by Trustees	435,000,000			435,000,000																												40,000,000		40,000,000														395,000,000		395,000,000
Maximum Percentage Debt to Capitalization				67.50%																				67.50%										67.50%																										67.50%
Total Commitment from Bank Conduits to Finance Receivables	750,000,000		700,000,000	750,000,000		700,000,000
Trust Fund Assets One Time Fee Obligation for Nuclear Fuel Disposition	$ 309,000,000			$ 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 June 30, 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 issuance amount.

[3] Amounts indicated on the statements of cash flows are net of issuance costs and premium or discount and will not tie to the issuance amounts.

[4] Pollution Control Bonds are subject to redemption earlier than the maturity date. Consequently, these bonds have been classified for maturity purposes as Long-term Debt Due Within One Year.

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

[6] Weighted average rate.