Benefit Plans 3 (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
American Electric Power System Retirement Savings Plans
Cost of Company Matching Contributions	$ 87,900	$ 81,900	$ 79,900
Benefit Plans Textuals [Abstract]
Matching Contributions Provided Percentage	100.00%
Eligible Compensation Contribution by Employee Percentage	1.00%
Second Matching Contributions Provided Percentage	70.00%
Second Eligible Compensation Contribution by Employee Percentage	5.00%
Multiemployer Plans Withdrawal Obligation	$ 13,000	12,000
Noncurrent Regulatory Assets	5,092,400	4,762,000
Noncurrent Regulatory Liabilities	8,182,400	8,115,600
Multiemployer Plan, Employer Contribution, Cost	396	329	339
AEP Texas Inc. [Member]
American Electric Power System Retirement Savings Plans
Cost of Company Matching Contributions	$ 7,100	6,500	6,400
Benefit Plans Textuals [Abstract]
Matching Contributions Provided Percentage	100.00%
Eligible Compensation Contribution by Employee Percentage	1.00%
Second Matching Contributions Provided Percentage	70.00%
Second Eligible Compensation Contribution by Employee Percentage	5.00%
Noncurrent Regulatory Assets	$ 315,300	298,300
Noncurrent Regulatory Liabilities	1,261,400	1,259,600
Appalachian Power Co [Member]
American Electric Power System Retirement Savings Plans
Cost of Company Matching Contributions	$ 8,400	7,800	7,600
Benefit Plans Textuals [Abstract]
Matching Contributions Provided Percentage	100.00%
Eligible Compensation Contribution by Employee Percentage	1.00%
Second Matching Contributions Provided Percentage	70.00%
Second Eligible Compensation Contribution by Employee Percentage	5.00%
Noncurrent Regulatory Assets	$ 1,155,100	1,058,600
Noncurrent Regulatory Liabilities	1,081,900	1,143,600
Indiana Michigan Power Co [Member]
American Electric Power System Retirement Savings Plans
Cost of Company Matching Contributions	$ 11,000	11,100	10,900
Benefit Plans Textuals [Abstract]
Matching Contributions Provided Percentage	100.00%
Eligible Compensation Contribution by Employee Percentage	1.00%
Second Matching Contributions Provided Percentage	70.00%
Second Eligible Compensation Contribution by Employee Percentage	5.00%
Noncurrent Regulatory Assets	$ 406,300	459,600
Noncurrent Regulatory Liabilities	2,052,300	1,702,200
Ohio Power Co [Member]
American Electric Power System Retirement Savings Plans
Cost of Company Matching Contributions	$ 8,200	7,700	7,200
Benefit Plans Textuals [Abstract]
Matching Contributions Provided Percentage	100.00%
Eligible Compensation Contribution by Employee Percentage	1.00%
Second Matching Contributions Provided Percentage	70.00%
Second Eligible Compensation Contribution by Employee Percentage	5.00%
Noncurrent Regulatory Assets	$ 455,000	327,300
Noncurrent Regulatory Liabilities	1,003,600	1,044,000
Public Service Co Of Oklahoma [Member]
American Electric Power System Retirement Savings Plans
Cost of Company Matching Contributions	$ 5,300	4,700	4,600
Benefit Plans Textuals [Abstract]
Matching Contributions Provided Percentage	100.00%
Eligible Compensation Contribution by Employee Percentage	1.00%
Second Matching Contributions Provided Percentage	70.00%
Second Eligible Compensation Contribution by Employee Percentage	5.00%
Noncurrent Regulatory Assets	$ 522,700	653,700
Noncurrent Regulatory Liabilities	765,600	809,100
Southwestern Electric Power Co [Member]
American Electric Power System Retirement Savings Plans
Cost of Company Matching Contributions	$ 6,700	6,400	6,400
Benefit Plans Textuals [Abstract]
Matching Contributions Provided Percentage	100.00%
Eligible Compensation Contribution by Employee Percentage	1.00%
Second Matching Contributions Provided Percentage	70.00%
Second Eligible Compensation Contribution by Employee Percentage	5.00%
Noncurrent Regulatory Assets	$ 1,131,800	1,042,400
Noncurrent Regulatory Liabilities	756,100	825,700
Pension Plans [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	3,933,500	3,883,000
Underfunded Benefit Obligation
Projected Benefit Obligation	4,161,600	4,072,700	5,187,000
Accumulated Benefit Obligation	3,933,500	3,883,000
Fair Value of Plan Assets	4,118,200	4,124,700	5,352,900
Estimated Future Benefit Payments and Contributions
Expected Contributions and Payments During 2024	6,700
Components of Net Periodic Benefit Cost
Service Cost	94,300	123,100	129,200
Interest Cost	219,200	148,200	137,200
Expected Return on Plan Assets	(339,200)	(253,400)	(229,700)
Amortization of Net Actuarial Loss	1,400	63,000	101,500
Net Periodic Benefit Cost (Credit)	(24,300)	80,900	138,200
Capitalized Portion	(43,600)	(53,800)	(55,700)
Net Periodic Benefit Cost (Credit) Recognized in Expense	(67,900)	27,100	82,500
Pension Plans [Member] \| Pension Payments [Member]
Estimated Future Benefit Payments and Contributions
Year One	369,500
Year Two	361,800
Year Three	365,700
Year Four	361,900
Year Five	357,800
After Year Five for Next Five Years, in Total	1,657,600
Pension Plans [Member] \| AEP Texas Inc. [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	323,200	317,900
Underfunded Benefit Obligation
Projected Benefit Obligation	343,100	334,100	419,800
Accumulated Benefit Obligation	323,200	317,900
Fair Value of Plan Assets	332,700	335,100	444,900
Estimated Future Benefit Payments and Contributions
Expected Contributions and Payments During 2024	300
Components of Net Periodic Benefit Cost
Service Cost	8,200	11,100	11,800
Interest Cost	18,300	12,100	11,200
Expected Return on Plan Assets	(28,100)	(21,000)	(19,500)
Amortization of Net Actuarial Loss	100	5,200	8,300
Net Periodic Benefit Cost (Credit)	(1,500)	7,400	11,800
Capitalized Portion	(4,700)	(6,200)	(6,600)
Net Periodic Benefit Cost (Credit) Recognized in Expense	(6,200)	1,200	5,200
Pension Plans [Member] \| AEP Texas Inc. [Member] \| Pension Payments [Member]
Estimated Future Benefit Payments and Contributions
Year One	36,700
Year Two	34,300
Year Three	34,500
Year Four	32,200
Year Five	32,200
After Year Five for Next Five Years, in Total	133,500
Pension Plans [Member] \| Appalachian Power Co [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	485,700	470,400
Underfunded Benefit Obligation
Projected Benefit Obligation	504,100	485,700	621,700
Accumulated Benefit Obligation	485,700	470,400
Fair Value of Plan Assets	549,800	531,700	683,300
Estimated Future Benefit Payments and Contributions
Expected Contributions and Payments During 2024	0
Components of Net Periodic Benefit Cost
Service Cost	9,100	11,400	11,900
Interest Cost	26,400	17,500	16,400
Expected Return on Plan Assets	(44,600)	(32,300)	(29,100)
Amortization of Net Actuarial Loss	0	7,400	12,000
Net Periodic Benefit Cost (Credit)	(9,100)	4,000	11,200
Capitalized Portion	(4,200)	(5,000)	(5,200)
Net Periodic Benefit Cost (Credit) Recognized in Expense	(13,300)	(1,000)	6,000
Pension Plans [Member] \| Appalachian Power Co [Member] \| Pension Payments [Member]
Estimated Future Benefit Payments and Contributions
Year One	43,900
Year Two	43,300
Year Three	44,100
Year Four	42,600
Year Five	43,500
After Year Five for Next Five Years, in Total	200,000
Pension Plans [Member] \| Indiana Michigan Power Co [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	451,000	445,000
Underfunded Benefit Obligation
Projected Benefit Obligation	477,000	466,800	612,100
Accumulated Benefit Obligation	451,000	445,000
Fair Value of Plan Assets	550,600	533,700	681,500
Estimated Future Benefit Payments and Contributions
Expected Contributions and Payments During 2024	0
Components of Net Periodic Benefit Cost
Service Cost	11,900	16,200	17,500
Interest Cost	24,900	17,000	16,200
Expected Return on Plan Assets	(44,200)	(32,400)	(28,900)
Amortization of Net Actuarial Loss	100	7,100	11,700
Net Periodic Benefit Cost (Credit)	(7,300)	7,900	16,500
Capitalized Portion	(3,600)	(4,600)	(4,900)
Net Periodic Benefit Cost (Credit) Recognized in Expense	(10,900)	3,300	11,600
Pension Plans [Member] \| Indiana Michigan Power Co [Member] \| Pension Payments [Member]
Estimated Future Benefit Payments and Contributions
Year One	39,000
Year Two	39,700
Year Three	39,700
Year Four	39,800
Year Five	39,400
After Year Five for Next Five Years, in Total	189,400
Pension Plans [Member] \| Ohio Power Co [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	354,100	344,200
Underfunded Benefit Obligation
Projected Benefit Obligation	378,400	363,600	470,700
Accumulated Benefit Obligation	354,100	344,200
Fair Value of Plan Assets	419,500	406,400	524,800
Estimated Future Benefit Payments and Contributions
Expected Contributions and Payments During 2024	0
Components of Net Periodic Benefit Cost
Service Cost	8,400	11,200	11,400
Interest Cost	19,800	13,300	12,500
Expected Return on Plan Assets	(34,000)	(24,800)	(22,300)
Amortization of Net Actuarial Loss	0	5,500	9,100
Net Periodic Benefit Cost (Credit)	(5,800)	5,200	10,700
Capitalized Portion	(4,700)	(6,100)	(6,200)
Net Periodic Benefit Cost (Credit) Recognized in Expense	(10,500)	(900)	4,500
Pension Plans [Member] \| Ohio Power Co [Member] \| Pension Payments [Member]
Estimated Future Benefit Payments and Contributions
Year One	32,600
Year Two	32,700
Year Three	32,500
Year Four	32,400
Year Five	31,300
After Year Five for Next Five Years, in Total	144,500
Pension Plans [Member] \| Public Service Co Of Oklahoma [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	187,800	180,300
Underfunded Benefit Obligation
Projected Benefit Obligation	202,200	192,300	252,600
Accumulated Benefit Obligation	187,800	180,300
Fair Value of Plan Assets	222,700	218,500	286,200
Estimated Future Benefit Payments and Contributions
Expected Contributions and Payments During 2024	100
Components of Net Periodic Benefit Cost
Service Cost	5,500	7,400	8,000
Interest Cost	10,700	7,000	6,700
Expected Return on Plan Assets	(18,300)	(13,400)	(12,300)
Amortization of Net Actuarial Loss	0	2,900	4,900
Net Periodic Benefit Cost (Credit)	(2,100)	3,900	7,300
Capitalized Portion	(2,500)	(3,200)	(3,400)
Net Periodic Benefit Cost (Credit) Recognized in Expense	(4,600)	700	3,900
Pension Plans [Member] \| Public Service Co Of Oklahoma [Member] \| Pension Payments [Member]
Estimated Future Benefit Payments and Contributions
Year One	19,700
Year Two	19,200
Year Three	19,400
Year Four	19,300
Year Five	19,000
After Year Five for Next Five Years, in Total	81,000
Pension Plans [Member] \| Southwestern Electric Power Co [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	242,900	235,100
Underfunded Benefit Obligation
Projected Benefit Obligation	261,200	250,700	317,700
Accumulated Benefit Obligation	242,900	235,100
Fair Value of Plan Assets	227,500	231,300	308,300
Underfunded Status, Projected Benefit Obligation	(33,700)	(19,400)
Estimated Future Benefit Payments and Contributions
Expected Contributions and Payments During 2024	100
Components of Net Periodic Benefit Cost
Service Cost	7,700	10,600	11,200
Interest Cost	13,900	9,100	8,500
Expected Return on Plan Assets	(19,400)	(14,600)	(13,500)
Amortization of Net Actuarial Loss	100	3,800	6,200
Net Periodic Benefit Cost (Credit)	2,300	8,900	12,400
Capitalized Portion	(3,000)	(4,000)	(4,100)
Net Periodic Benefit Cost (Credit) Recognized in Expense	(700)	4,900	8,300
Pension Plans [Member] \| Southwestern Electric Power Co [Member] \| Pension Payments [Member]
Estimated Future Benefit Payments and Contributions
Year One	24,400
Year Two	25,800
Year Three	26,100
Year Four	25,300
Year Five	23,700
After Year Five for Next Five Years, in Total	105,600
Qualified Pension Plans [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	3,878,700	3,827,400
Underfunded Benefit Obligation
Accumulated Benefit Obligation	3,878,700	3,827,400
Qualified Pension Plans [Member] \| AEP Texas Inc. [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	321,100	315,400
Underfunded Benefit Obligation
Accumulated Benefit Obligation	321,100	315,400
Qualified Pension Plans [Member] \| Appalachian Power Co [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	485,600	470,100
Underfunded Benefit Obligation
Accumulated Benefit Obligation	485,600	470,100
Qualified Pension Plans [Member] \| Indiana Michigan Power Co [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	450,300	443,800
Underfunded Benefit Obligation
Accumulated Benefit Obligation	450,300	443,800
Qualified Pension Plans [Member] \| Ohio Power Co [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	354,000	344,100
Underfunded Benefit Obligation
Accumulated Benefit Obligation	354,000	344,100
Qualified Pension Plans [Member] \| Public Service Co Of Oklahoma [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	186,600	179,100
Underfunded Benefit Obligation
Accumulated Benefit Obligation	186,600	179,100
Qualified Pension Plans [Member] \| Southwestern Electric Power Co [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	241,900	234,000
Underfunded Benefit Obligation
Accumulated Benefit Obligation	241,900	234,000
Nonqualified Pension Plans [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	54,800	55,600
Underfunded Benefit Obligation
Projected Benefit Obligation	60,700	61,500
Accumulated Benefit Obligation	54,800	55,600
Fair Value of Plan Assets	0	0
Underfunded Status, Projected Benefit Obligation	(60,700)	(61,500)
Underfunded Status, Accumulated Benefit Obligation	(54,800)	(55,600)
Nonqualified Pension Plans [Member] \| AEP Texas Inc. [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	2,100	2,500
Underfunded Benefit Obligation
Projected Benefit Obligation		2,700
Accumulated Benefit Obligation	2,100	2,500
Fair Value of Plan Assets	0	0
Underfunded Status, Projected Benefit Obligation	(10,400)	(2,700)
Underfunded Status, Accumulated Benefit Obligation	(2,100)	(2,500)
Nonqualified Pension Plans [Member] \| Appalachian Power Co [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	100	300
Underfunded Benefit Obligation
Projected Benefit Obligation	400	600
Accumulated Benefit Obligation	100	300
Fair Value of Plan Assets	0	0
Underfunded Status, Projected Benefit Obligation	(400)	(600)
Underfunded Status, Accumulated Benefit Obligation	(100)	(300)
Nonqualified Pension Plans [Member] \| Indiana Michigan Power Co [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	700	1,200
Underfunded Benefit Obligation
Projected Benefit Obligation	1,200	1,600
Accumulated Benefit Obligation	700	1,200
Fair Value of Plan Assets	0	0
Underfunded Status, Projected Benefit Obligation	(1,200)	(1,600)
Underfunded Status, Accumulated Benefit Obligation	(700)	(1,200)
Nonqualified Pension Plans [Member] \| Ohio Power Co [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	100	100
Underfunded Benefit Obligation
Projected Benefit Obligation	300	300
Accumulated Benefit Obligation	100	100
Fair Value of Plan Assets	0	0
Underfunded Status, Projected Benefit Obligation	(300)	(300)
Underfunded Status, Accumulated Benefit Obligation	(100)	(100)
Nonqualified Pension Plans [Member] \| Public Service Co Of Oklahoma [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	1,200	1,200
Underfunded Benefit Obligation
Projected Benefit Obligation	1,400	1,500
Accumulated Benefit Obligation	1,200	1,200
Fair Value of Plan Assets	0	0
Underfunded Status, Projected Benefit Obligation	(1,400)	(1,500)
Underfunded Status, Accumulated Benefit Obligation	(1,200)	(1,200)
Nonqualified Pension Plans [Member] \| Southwestern Electric Power Co [Member]
Accumulated Benefit Obligation
Accumulated Benefit Obligation	1,000	1,100
Underfunded Benefit Obligation
Accumulated Benefit Obligation	1,000	1,100
Fair Value of Plan Assets	227,500	231,300
Underfunded Status, Accumulated Benefit Obligation	(15,400)	(3,800)
Other Postretirement Benefit Plans [Member]
Underfunded Benefit Obligation
Projected Benefit Obligation	849,500	872,600	1,041,300
Fair Value of Plan Assets	1,673,300	1,549,300	2,044,300
Estimated Future Benefit Payments and Contributions
Expected Contributions and Payments During 2024	3,000
Components of Net Periodic Benefit Cost
Service Cost	4,600	7,400	9,500
Interest Cost	46,200	29,200	30,500
Expected Return on Plan Assets	(109,600)	(110,000)	(91,100)
Amortization of Prior Service Cost (Credit)	(63,100)	(71,400)	(70,900)
Amortization of Net Actuarial Loss	14,800
Net Periodic Benefit Cost (Credit)	(107,100)	(144,800)	(122,000)
Capitalized Portion	(2,100)	(3,200)	(4,100)
Net Periodic Benefit Cost (Credit) Recognized in Expense	(109,200)	(148,000)	(126,100)
Other Postretirement Benefit Plans [Member] \| Benefit Payments [Member]
Estimated Future Benefit Payments and Contributions
Year One	117,200
Year Two	122,600
Year Three	122,400
Year Four	121,500
Year Five	120,200
After Year Five for Next Five Years, in Total	566,100
Other Postretirement Benefit Plans [Member] \| Medicare Subsidy Receipts [Member]
Estimated Future Benefit Payments and Contributions
Year One	300
Year Two	300
Year Three	300
Year Four	300
Year Five	300
After Year Five for Next Five Years, in Total	1,500
Other Postretirement Benefit Plans [Member] \| AEP Texas Inc. [Member]
Underfunded Benefit Obligation
Projected Benefit Obligation	66,400	68,600	80,500
Fair Value of Plan Assets	137,500	128,300	168,800
Estimated Future Benefit Payments and Contributions
Expected Contributions and Payments During 2024	0
Components of Net Periodic Benefit Cost
Service Cost	300	500	700
Interest Cost	3,600	2,200	2,400
Expected Return on Plan Assets	(9,000)	(9,100)	(7,500)
Amortization of Prior Service Cost (Credit)	(5,300)	(6,100)	(6,000)
Amortization of Net Actuarial Loss	1,200
Net Periodic Benefit Cost (Credit)	(9,200)	(12,500)	(10,400)
Capitalized Portion	(200)	(300)	(400)
Net Periodic Benefit Cost (Credit) Recognized in Expense	(9,400)	(12,800)	(10,800)
Other Postretirement Benefit Plans [Member] \| AEP Texas Inc. [Member] \| Benefit Payments [Member]
Estimated Future Benefit Payments and Contributions
Year One	9,400
Year Two	10,000
Year Three	10,200
Year Four	10,200
Year Five	9,900
After Year Five for Next Five Years, in Total	45,200
Other Postretirement Benefit Plans [Member] \| AEP Texas Inc. [Member] \| Medicare Subsidy Receipts [Member]
Estimated Future Benefit Payments and Contributions
Year One	0
Year Two	0
Year Three	0
Year Four	0
Year Five	0
After Year Five for Next Five Years, in Total	0
Other Postretirement Benefit Plans [Member] \| Appalachian Power Co [Member]
Underfunded Benefit Obligation
Projected Benefit Obligation	134,600	140,700	167,300
Fair Value of Plan Assets	243,000	228,600	302,300
Estimated Future Benefit Payments and Contributions
Expected Contributions and Payments During 2024	1,600
Components of Net Periodic Benefit Cost
Service Cost	500	800	1,000
Interest Cost	7,400	4,700	4,900
Expected Return on Plan Assets	(16,100)	(16,300)	(13,500)
Amortization of Prior Service Cost (Credit)	(9,200)	(10,400)	(10,300)
Amortization of Net Actuarial Loss	2,300
Net Periodic Benefit Cost (Credit)	(15,100)	(21,200)	(17,900)
Capitalized Portion	(200)	(400)	(400)
Net Periodic Benefit Cost (Credit) Recognized in Expense	(15,300)	(21,600)	(18,300)
Other Postretirement Benefit Plans [Member] \| Appalachian Power Co [Member] \| Benefit Payments [Member]
Estimated Future Benefit Payments and Contributions
Year One	18,800
Year Two	19,400
Year Three	19,300
Year Four	19,100
Year Five	19,000
After Year Five for Next Five Years, in Total	88,300
Other Postretirement Benefit Plans [Member] \| Appalachian Power Co [Member] \| Medicare Subsidy Receipts [Member]
Estimated Future Benefit Payments and Contributions
Year One	100
Year Two	100
Year Three	100
Year Four	100
Year Five	100
After Year Five for Next Five Years, in Total	500
Other Postretirement Benefit Plans [Member] \| Indiana Michigan Power Co [Member]
Underfunded Benefit Obligation
Projected Benefit Obligation	98,800	101,900	118,600
Fair Value of Plan Assets	204,600	190,500	248,700
Estimated Future Benefit Payments and Contributions
Expected Contributions and Payments During 2024	0
Components of Net Periodic Benefit Cost
Service Cost	600	900	1,300
Interest Cost	5,400	3,400	3,500
Expected Return on Plan Assets	(13,500)	(13,700)	(11,100)
Amortization of Prior Service Cost (Credit)	(8,700)	(9,700)	(9,600)
Amortization of Net Actuarial Loss	1,900
Net Periodic Benefit Cost (Credit)	(14,300)	(19,100)	(15,900)
Capitalized Portion	(200)	(300)	(400)
Net Periodic Benefit Cost (Credit) Recognized in Expense	(14,500)	(19,400)	(16,300)
Other Postretirement Benefit Plans [Member] \| Indiana Michigan Power Co [Member] \| Benefit Payments [Member]
Estimated Future Benefit Payments and Contributions
Year One	15,200
Year Two	15,700
Year Three	15,700
Year Four	15,400
Year Five	15,000
After Year Five for Next Five Years, in Total	69,700
Other Postretirement Benefit Plans [Member] \| Indiana Michigan Power Co [Member] \| Medicare Subsidy Receipts [Member]
Estimated Future Benefit Payments and Contributions
Year One	0
Year Two	0
Year Three	0
Year Four	0
Year Five	0
After Year Five for Next Five Years, in Total	0
Other Postretirement Benefit Plans [Member] \| Ohio Power Co [Member]
Underfunded Benefit Obligation
Projected Benefit Obligation	85,900	88,900	104,900
Fair Value of Plan Assets	177,800	166,200	220,000
Estimated Future Benefit Payments and Contributions
Expected Contributions and Payments During 2024	0
Components of Net Periodic Benefit Cost
Service Cost	400	600	800
Interest Cost	4,700	3,000	3,000
Expected Return on Plan Assets	(11,800)	(12,000)	(9,700)
Amortization of Prior Service Cost (Credit)	(6,300)	(7,100)	(7,200)
Amortization of Net Actuarial Loss	1,600
Net Periodic Benefit Cost (Credit)	(11,400)	(15,500)	(13,100)
Capitalized Portion	(200)	(300)	(400)
Net Periodic Benefit Cost (Credit) Recognized in Expense	(11,600)	(15,800)	(13,500)
Other Postretirement Benefit Plans [Member] \| Ohio Power Co [Member] \| Benefit Payments [Member]
Estimated Future Benefit Payments and Contributions
Year One	12,600
Year Two	13,000
Year Three	12,800
Year Four	12,700
Year Five	12,500
After Year Five for Next Five Years, in Total	57,600
Other Postretirement Benefit Plans [Member] \| Ohio Power Co [Member] \| Medicare Subsidy Receipts [Member]
Estimated Future Benefit Payments and Contributions
Year One	0
Year Two	0
Year Three	0
Year Four	0
Year Five	0
After Year Five for Next Five Years, in Total	0
Other Postretirement Benefit Plans [Member] \| Public Service Co Of Oklahoma [Member]

Accumulated Benefit Obligation.

No definition available.

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- Definition

American Electric Power System Retirement Savings Plans

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No definition available.

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- Definition

Benefit Plans.

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No definition available.

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- Definition

Capitalized portion of Net Periodic Benefit Cost.

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No definition available.

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- Definition

Eligible Compensation Contribution by Employee.

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No definition available.

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