Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		$ (102,000)	$ (104,000)	$ (103,000)	$ (115,000)
Change in Fair Value Recognized in AOCI		(4,000)	3,000	(3,000)	(7,000)
Amounts Reclassified from AOCI		(3,000)	(4,000)	(8,000)	17,000
Net Current Period Other Comprehensive Income		(7,000)	(1,000)	(11,000)	10,000
Pension and OPEB Adjustment Related to Mitchell Plant				5,000
Ending Balance in AOCI		(109,000)	(105,000)	(109,000)	(105,000)
Commodity:
Generation & Marketing Revenues		30,000	28,000	90,000	22,000
Purchased Electricity for Resale		731,000	449,000	2,050,000	1,560,000
Other Operation Expense		691,000	685,000	1,955,000	1,985,000
Maintenance Expense		312,000	313,000	923,000	929,000
Interest Rate and Foreign Currency:
Depreciation and Amortization Expense		535,000	499,000	1,528,000	1,418,000
Interest Expense		221,000	217,000	659,000	650,000
Income Tax (Expense) Credit		(275,000)	(264,000)	(827,000)	(783,000)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(3,000)	(4,000)	(8,000)	17,000
Gains and Losses on Available-for-Sale Securities
Interest Expense		221,000	217,000	659,000	650,000
Income Tax (Expense) Credit		(275,000)	(264,000)	(827,000)	(783,000)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(3,000)	(4,000)	(8,000)	17,000
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(275,000)	(264,000)	(827,000)	(783,000)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(3,000)	(4,000)	(8,000)	17,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(3,000)	(4,000)	(8,000)	17,000
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts Reclassified from AOCI		(3,000)	(5,000)	(9,000)	14,000
Commodity:
Subtotal - Commodity		(5,000)	(7,000)	(15,000)	23,000
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(5,000)	(7,000)	(15,000)	23,000
Reclassifications from AOCI, before Income Tax (Expense) Credit		(5,000)	(7,000)	(15,000)	23,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(3,000)	(5,000)	(9,000)	14,000
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(5,000)	(7,000)	(15,000)	23,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(3,000)	(5,000)	(9,000)	14,000
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		(5,000)	(7,000)	(15,000)	23,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(3,000)	(5,000)	(9,000)	14,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(3,000)	(5,000)	(9,000)	14,000
Securities Available for Sale [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		8,000	8,000	8,000	7,000
Change in Fair Value Recognized in AOCI		(1,000)	0	(1,000)	1,000
Amounts Reclassified from AOCI		0	0	0	0
Net Current Period Other Comprehensive Income		(1,000)	0	(1,000)	1,000
Pension and OPEB Adjustment Related to Mitchell Plant				0
Ending Balance in AOCI		7,000	8,000	7,000	8,000
Interest Rate and Foreign Currency:
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	0
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	0
Amortization of Pension and OPEB
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	0
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	0
Pension and OPEB [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		(87,000)	(97,000)	(93,000)	(99,000)
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		0	1,000	1,000	3,000
Net Current Period Other Comprehensive Income		0	1,000	1,000	3,000
Pension and OPEB Adjustment Related to Mitchell Plant				5,000
Ending Balance in AOCI		(87,000)	(96,000)	(87,000)	(96,000)
Commodity:
Subtotal - Commodity		0	2,000	1,000	6,000
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		0	2,000	1,000	6,000
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	2,000	1,000	6,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	1,000	1,000	3,000
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	2,000	1,000	6,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	1,000	1,000	3,000
Amortization of Pension and OPEB
Prior Service Cost (Credit)		(5,000)	(5,000)	(15,000)	(15,000)
Actuarial (Gains)/Losses		5,000	7,000	16,000	21,000
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	2,000	1,000	6,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	1,000	1,000	3,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	1,000	1,000	3,000
Commodity [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		(5,000)	6,000	1,000	0
Change in Fair Value Recognized in AOCI		(3,000)	3,000	(2,000)	(8,000)
Amounts Reclassified from AOCI		(3,000)	(6,000)	(10,000)	11,000
Net Current Period Other Comprehensive Income		(6,000)	(3,000)	(12,000)	3,000
Pension and OPEB Adjustment Related to Mitchell Plant				0
Ending Balance in AOCI		(11,000)	3,000	(11,000)	3,000
Commodity:
Subtotal - Commodity		(5,000)	(9,000)	(16,000)	17,000
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(5,000)	(9,000)	(16,000)	17,000
Reclassifications from AOCI, before Income Tax (Expense) Credit		(5,000)	(9,000)	(16,000)	17,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(3,000)	(6,000)	(10,000)	11,000
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(5,000)	(9,000)	(16,000)	17,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(3,000)	(6,000)	(10,000)	11,000
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		(5,000)	(9,000)	(16,000)	17,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(3,000)	(6,000)	(10,000)	11,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(3,000)	(6,000)	(10,000)	11,000
Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		(18,000)	(21,000)	(19,000)	(23,000)
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		0	1,000	1,000	3,000
Net Current Period Other Comprehensive Income		0	1,000	1,000	3,000
Pension and OPEB Adjustment Related to Mitchell Plant				0
Ending Balance in AOCI		(18,000)	(20,000)	(18,000)	(20,000)
Commodity:
Subtotal - Commodity		0	2,000	1,000	6,000
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		0	2,000	1,000	6,000
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	2,000	1,000	6,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	1,000	1,000	3,000
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	2,000	1,000	6,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	1,000	1,000	3,000
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	2,000	1,000	6,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	1,000	1,000	3,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	1,000	1,000	3,000
Reclassifications from Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		(2,000)	(2,000)	(6,000)	9,000
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		(2,000)	(2,000)	(6,000)	9,000
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(2,000)	(2,000)	(6,000)	9,000
Reclassifications from Accumulated Other Comprehensive Income [Member] | Pension and OPEB [Member]
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		0	1,000	0	3,000
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		0	1,000	0	3,000
Amortization of Pension and OPEB
Income Tax (Expense) Credit		0	1,000	0	3,000
Reclassifications from Accumulated Other Comprehensive Income [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Commodity:
Generation & Marketing Revenues		(19,000)	0	(36,000)	0
Purchased Electricity for Resale		14,000	(9,000)	20,000	20,000
Regulatory Assets/(Liabilities), Net	[1]			0	(3,000)
Reclassifications from Accumulated Other Comprehensive Income [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Interest Expense		0	2,000	1,000	6,000
Gains and Losses on Available-for-Sale Securities
Interest Expense		0	2,000	1,000	6,000
Appalachian Power Co [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		4,247	2,697	5,032	2,951
Change in Fair Value Recognized in AOCI		0	0	0	1,686
Amounts Reclassified from AOCI		(680)	(163)	(1,465)	(2,103)
Net Current Period Other Comprehensive Income		(680)	(163)	(1,465)	(417)
Ending Balance in AOCI		3,567	2,534	3,567	2,534
Commodity:
Generation & Marketing Revenues		2,857	1,970	7,870	6,537
Purchased Electricity for Resale		80,452	85,656	258,836	340,680
Other Operation Expense		101,841	103,835	311,631	297,269
Maintenance Expense		70,459	64,333	179,793	193,907
Interest Rate and Foreign Currency:
Depreciation and Amortization Expense		96,295	99,889	292,735	300,125
Interest Expense		46,625	52,738	145,600	157,540
Income Tax (Expense) Credit		(40,507)	(31,408)	(168,368)	(121,233)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(680)	(163)	(1,465)	(2,103)
Gains and Losses on Available-for-Sale Securities
Interest Expense		46,625	52,738	145,600	157,540
Income Tax (Expense) Credit		(40,507)	(31,408)	(168,368)	(121,233)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(680)	(163)	(1,465)	(2,103)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(40,507)	(31,408)	(168,368)	(121,233)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(680)	(163)	(1,465)	(2,103)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(680)	(163)	(1,465)	(2,103)
Appalachian Power Co [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts Reclassified from AOCI		(222)	170	(91)	(1,104)
Commodity:
Subtotal - Commodity		(342)	262	(140)	(1,696)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(342)	262	(140)	(1,696)
Reclassifications from AOCI, before Income Tax (Expense) Credit		(342)	262	(140)	(1,696)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(222)	170	(91)	(1,104)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(342)	262	(140)	(1,696)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(222)	170	(91)	(1,104)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		(342)	262	(140)	(1,696)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(222)	170	(91)	(1,104)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(222)	170	(91)	(1,104)
Appalachian Power Co [Member] | Pension and OPEB [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		220	(899)	1,136	(233)
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		(458)	(333)	(1,374)	(999)
Net Current Period Other Comprehensive Income		(458)	(333)	(1,374)	(999)
Ending Balance in AOCI		(238)	(1,232)	(238)	(1,232)
Commodity:
Subtotal - Commodity		(705)	(512)	(2,114)	(1,537)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(705)	(512)	(2,114)	(1,537)
Reclassifications from AOCI, before Income Tax (Expense) Credit		(705)	(512)	(2,114)	(1,537)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(458)	(333)	(1,374)	(999)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(705)	(512)	(2,114)	(1,537)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(458)	(333)	(1,374)	(999)
Amortization of Pension and OPEB
Prior Service Cost (Credit)		(1,282)	(1,281)	(3,847)	(3,846)
Actuarial (Gains)/Losses		577	769	1,733	2,309
Reclassifications from AOCI, before Income Tax (Expense) Credit		(705)	(512)	(2,114)	(1,537)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(458)	(333)	(1,374)	(999)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(458)	(333)	(1,374)	(999)
Appalachian Power Co [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		0	0	0	94
Change in Fair Value Recognized in AOCI		0	0	0	1,686
Amounts Reclassified from AOCI		0	0	0	(1,780)
Net Current Period Other Comprehensive Income		0	0	0	(94)
Ending Balance in AOCI		0	0	0	0
Commodity:
Subtotal - Commodity		0	0	0	(2,738)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		0	0	0	(2,738)
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(2,738)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(1,780)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(2,738)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(1,780)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(2,738)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(1,780)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(1,780)
Appalachian Power Co [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		4,027	3,596	3,896	3,090
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		(222)	170	(91)	676
Net Current Period Other Comprehensive Income		(222)	170	(91)	676
Ending Balance in AOCI		3,805	3,766	3,805	3,766
Commodity:
Subtotal - Commodity		(342)	262	(140)	1,042
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(342)	262	(140)	1,042
Reclassifications from AOCI, before Income Tax (Expense) Credit		(342)	262	(140)	1,042
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(222)	170	(91)	676
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(342)	262	(140)	1,042
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(222)	170	(91)	676
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		(342)	262	(140)	1,042
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(222)	170	(91)	676
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(222)	170	(91)	676
Appalachian Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		(120)	92	(49)	(592)
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		(120)	92	(49)	(592)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(120)	92	(49)	(592)
Appalachian Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Pension and OPEB [Member]
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		(247)	(179)	(740)	(538)
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		(247)	(179)	(740)	(538)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(247)	(179)	(740)	(538)
Appalachian Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Commodity:
Purchased Electricity for Resale		0	0	0	(526)
Other Operation Expense				0	(10)
Maintenance Expense				0	(20)
Property, Plant and Equipment				0	(17)
Regulatory Assets/(Liabilities), Net	[1]	0	0	0	(2,165)
Appalachian Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Interest Expense		(342)	262	(140)	1,042
Gains and Losses on Available-for-Sale Securities
Interest Expense		(342)	262	(140)	1,042
Indiana Michigan Power Co [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		(13,803)	(14,648)	(14,360)	(15,509)
Change in Fair Value Recognized in AOCI		0	0	0	1,130
Amounts Reclassified from AOCI		278	452	835	183
Net Current Period Other Comprehensive Income		278	452	835	1,313
Ending Balance in AOCI		(13,525)	(14,196)	(13,525)	(14,196)
Commodity:
Generation & Marketing Revenues		786	749	2,626	1,298
Purchased Electricity for Resale		41,544	20,019	147,711	52,467
Other Operation Expense		141,054	144,331	407,320	431,953
Maintenance Expense		53,727	59,043	160,907	161,854
Interest Rate and Foreign Currency:
Depreciation and Amortization Expense		49,215	50,585	150,162	150,062
Interest Expense		23,144	22,617	68,889	71,955
Income Tax (Expense) Credit		(27,691)	(20,654)	(86,725)	(71,596)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		278	452	835	183
Gains and Losses on Available-for-Sale Securities
Interest Expense		23,144	22,617	68,889	71,955
Income Tax (Expense) Credit		(27,691)	(20,654)	(86,725)	(71,596)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		278	452	835	183
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(27,691)	(20,654)	(86,725)	(71,596)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		278	452	835	183
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		278	452	835	183
Indiana Michigan Power Co [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts Reclassified from AOCI		267	410	802	55
Commodity:
Subtotal - Commodity		412	631	1,234	84
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		412	631	1,234	84
Reclassifications from AOCI, before Income Tax (Expense) Credit		412	631	1,234	84
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		267	410	802	55
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		412	631	1,234	84
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		267	410	802	55
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		412	631	1,234	84
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		267	410	802	55
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		267	410	802	55
Indiana Michigan Power Co [Member] | Pension and OPEB [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		68	507	46	421
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		11	42	33	128
Net Current Period Other Comprehensive Income		11	42	33	128
Ending Balance in AOCI		79	549	79	549
Commodity:
Subtotal - Commodity		17	64	51	194
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		17	64	51	194
Reclassifications from AOCI, before Income Tax (Expense) Credit		17	64	51	194
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		11	42	33	128
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		17	64	51	194
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		11	42	33	128
Amortization of Pension and OPEB
Prior Service Cost (Credit)		(198)	(200)	(596)	(597)
Actuarial (Gains)/Losses		215	264	647	791
Reclassifications from AOCI, before Income Tax (Expense) Credit		17	64	51	194
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		11	42	33	128
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		11	42	33	128
Indiana Michigan Power Co [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		0	0	0	46
Change in Fair Value Recognized in AOCI		0	0	0	1,130
Amounts Reclassified from AOCI		0	0	0	(1,176)
Net Current Period Other Comprehensive Income		0	0	0	(46)
Ending Balance in AOCI		0	0	0	0
Commodity:
Subtotal - Commodity		0	0	0	(1,809)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		0	0	0	(1,809)
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(1,809)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(1,176)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(1,809)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(1,176)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(1,809)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(1,176)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(1,176)
Indiana Michigan Power Co [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		(13,871)	(15,155)	(14,406)	(15,976)
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		267	410	802	1,231
Net Current Period Other Comprehensive Income		267	410	802	1,231
Ending Balance in AOCI		(13,604)	(14,745)	(13,604)	(14,745)
Commodity:
Subtotal - Commodity		412	631	1,234	1,893
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		412	631	1,234	1,893
Reclassifications from AOCI, before Income Tax (Expense) Credit		412	631	1,234	1,893
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		267	410	802	1,231
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		412	631	1,234	1,893
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		267	410	802	1,231
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		412	631	1,234	1,893
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		267	410	802	1,231
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		267	410	802	1,231
Indiana Michigan Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		145	221	432	29
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		145	221	432	29
Amortization of Pension and OPEB
Income Tax (Expense) Credit		145	221	432	29
Indiana Michigan Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Pension and OPEB [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts Reclassified from AOCI		11	42
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		6	22	18	66
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		11	42
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		6	22	18	66
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		11	42
Amortization of Pension and OPEB
Income Tax (Expense) Credit		6	22	18	66
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		11	42
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		11	42
Indiana Michigan Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Ending Balance in AOCI		0	0	0	0
Commodity:
Purchased Electricity for Resale		0	0	0	(812)
Other Operation Expense				0	(7)
Maintenance Expense				0	(7)
Property, Plant and Equipment				0	(10)
Regulatory Assets/(Liabilities), Net	[1]	0	0	0	(973)
Indiana Michigan Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Interest Expense		412	631	1,234	1,893
Gains and Losses on Available-for-Sale Securities
Interest Expense		412	631	1,234	1,893
Ohio Power Co [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		4,916	6,288	5,602	7,079
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		(344)	(343)	(1,030)	(1,134)
Net Current Period Other Comprehensive Income		(344)	(343)	(1,030)	(1,134)
Ending Balance in AOCI		4,572	5,945	4,572	5,945
Commodity:
Generation & Marketing Revenues		1,953	1,564	6,416	4,628
Purchased Electricity for Resale		173,094	48,541	431,608	191,730
Other Operation Expense		170,144	145,163	446,817	428,074
Maintenance Expense		39,437	53,724	121,224	136,965
Interest Rate and Foreign Currency:
Depreciation and Amortization Expense		63,757	54,968	178,609	165,152
Interest Expense		32,593	31,171	96,313	96,937
Income Tax (Expense) Credit		(38,541)	(28,865)	(100,641)	(98,759)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(344)	(343)	(1,030)	(1,134)
Gains and Losses on Available-for-Sale Securities
Interest Expense		32,593	31,171	96,313	96,937
Income Tax (Expense) Credit		(38,541)	(28,865)	(100,641)	(98,759)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(344)	(343)	(1,030)	(1,134)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(38,541)	(28,865)	(100,641)	(98,759)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(344)	(343)	(1,030)	(1,134)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(344)	(343)	(1,030)	(1,134)
Ohio Power Co [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts Reclassified from AOCI		(344)	(343)	(1,030)	(1,134)
Commodity:
Subtotal - Commodity		(530)	(527)	(1,584)	(1,743)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(530)	(527)	(1,584)	(1,743)
Reclassifications from AOCI, before Income Tax (Expense) Credit		(530)	(527)	(1,584)	(1,743)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(344)	(343)	(1,030)	(1,134)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(530)	(527)	(1,584)	(1,743)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(344)	(343)	(1,030)	(1,134)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		(530)	(527)	(1,584)	(1,743)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(344)	(343)	(1,030)	(1,134)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(344)	(343)	(1,030)	(1,134)
Ohio Power Co [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		0	0	0	105
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		0	0	0	(105)
Net Current Period Other Comprehensive Income		0	0	0	(105)
Ending Balance in AOCI		0	0	0	0
Commodity:
Subtotal - Commodity		0	0	0	(162)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		0	0	0	(162)
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(162)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(105)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(162)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(105)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(162)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(105)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(105)
Ohio Power Co [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		4,916	6,288	5,602	6,974
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		(344)	(343)	(1,030)	(1,029)
Net Current Period Other Comprehensive Income		(344)	(343)	(1,030)	(1,029)
Ending Balance in AOCI		4,572	5,945	4,572	5,945
Commodity:
Subtotal - Commodity		(530)	(527)	(1,584)	(1,581)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(530)	(527)	(1,584)	(1,581)
Reclassifications from AOCI, before Income Tax (Expense) Credit		(530)	(527)	(1,584)	(1,581)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(344)	(343)	(1,030)	(1,029)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(530)	(527)	(1,584)	(1,581)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(344)	(343)	(1,030)	(1,029)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		(530)	(527)	(1,584)	(1,581)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(344)	(343)	(1,030)	(1,029)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(344)	(343)	(1,030)	(1,029)
Ohio Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		(186)	(184)	(554)	(609)
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		(186)	(184)	(554)	(609)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(186)	(184)	(554)	(609)
Ohio Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Commodity:
Other Operation Expense		0	0	0	(11)
Maintenance Expense		0	0	0	(11)
Property, Plant and Equipment		0	0	0	(18)
Regulatory Assets/(Liabilities), Net	[1]	0	0	0	(122)
Ohio Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Depreciation and Amortization Expense		(4)	(3)	(10)	(9)
Interest Expense		(526)	(524)	(1,574)	(1,572)
Gains and Losses on Available-for-Sale Securities
Interest Expense		(526)	(524)	(1,574)	(1,572)
Public Service Co Of Oklahoma [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		4,563	5,322	4,943	5,758
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		(189)	(190)	(569)	(626)
Net Current Period Other Comprehensive Income		(189)	(190)	(569)	(626)
Ending Balance in AOCI		4,374	5,132	4,374	5,132
Commodity:
Generation & Marketing Revenues		709	1,009	2,258	2,524
Purchased Electricity for Resale		103,226	117,521	253,785	301,816
Other Operation Expense		77,541	71,605	199,334	193,101
Maintenance Expense		27,239	21,800	74,322	76,223
Interest Rate and Foreign Currency:
Depreciation and Amortization Expense		30,832	24,496	90,148	73,085
Interest Expense		14,950	13,913	44,372	41,009
Income Tax (Expense) Credit		(27,298)	(28,746)	(51,260)	(46,979)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(189)	(190)	(569)	(626)
Gains and Losses on Available-for-Sale Securities
Interest Expense		14,950	13,913	44,372	41,009
Income Tax (Expense) Credit		(27,298)	(28,746)	(51,260)	(46,979)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(189)	(190)	(569)	(626)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(27,298)	(28,746)	(51,260)	(46,979)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(189)	(190)	(569)	(626)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(189)	(190)	(569)	(626)
Public Service Co Of Oklahoma [Member] | Cash Flow Hedges [Member]
Commodity:
Subtotal - Commodity		(291)	(292)	(875)	(964)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(291)	(292)	(875)	(964)
Reclassifications from AOCI, before Income Tax (Expense) Credit		(291)	(292)	(875)	(964)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(291)	(292)	(875)	(964)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		(291)	(292)	(875)	(964)
Public Service Co Of Oklahoma [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		0	0	0	57
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		0	0	0	(57)
Net Current Period Other Comprehensive Income		0	0	0	(57)
Ending Balance in AOCI		0	0	0	0
Commodity:
Subtotal - Commodity		0	0	0	(88)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		0	0	0	(88)
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(88)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(57)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(88)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(57)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(88)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(57)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(57)
Public Service Co Of Oklahoma [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		4,563	5,322	4,943	5,701
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		(189)	(190)	(569)	(569)
Net Current Period Other Comprehensive Income		(189)	(190)	(569)	(569)
Ending Balance in AOCI		4,374	5,132	4,374	5,132
Commodity:
Subtotal - Commodity		(291)	(292)	(875)	(876)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(291)	(292)	(875)	(876)
Reclassifications from AOCI, before Income Tax (Expense) Credit		(291)	(292)	(875)	(876)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(189)	(190)	(569)	(569)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(291)	(292)	(875)	(876)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(189)	(190)	(569)	(569)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		(291)	(292)	(875)	(876)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(189)	(190)	(569)	(569)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(189)	(190)	(569)	(569)
Public Service Co Of Oklahoma [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts Reclassified from AOCI				(569)	(626)
Interest Rate and Foreign Currency:
Reclassifications from AOCI, Net of Income Tax (Expense) Credit				(569)	(626)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, Net of Income Tax (Expense) Credit				(569)	(626)
Amortization of Pension and OPEB
Reclassifications from AOCI, Net of Income Tax (Expense) Credit				(569)	(626)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit				(569)	(626)
Public Service Co Of Oklahoma [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		(102)	(102)	(306)	(338)
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		(102)	(102)	(306)	(338)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(102)	(102)	(306)	(338)
Public Service Co Of Oklahoma [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Commodity:
Other Operation Expense		0	0	0	(8)
Maintenance Expense		0	0	0	(9)
Property, Plant and Equipment		0	0	0	(13)
Regulatory Assets/(Liabilities), Net	[1]	0	0	0	(58)
Public Service Co Of Oklahoma [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Interest Expense		(291)	(292)	(875)	(876)
Gains and Losses on Available-for-Sale Securities
Interest Expense		(291)	(292)	(875)	(876)
Southwestern Electric Power Co [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		(6,811)	(7,844)	(7,466)	(8,444)
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		192	332	847	932
Net Current Period Other Comprehensive Income		192	332	847	932
Ending Balance in AOCI		(6,619)	(7,512)	(6,619)	(7,512)
Commodity:
Generation & Marketing Revenues		618	521	1,486	1,570
Purchased Electricity for Resale		23,597	36,960	70,799	138,380
Other Operation Expense		81,391	68,601	214,835	206,442
Maintenance Expense		34,425	29,867	100,076	93,946
Interest Rate and Foreign Currency:
Depreciation and Amortization Expense		48,862	46,791	143,780	138,316
Interest Expense		29,263	31,644	91,423	95,258
Income Tax (Expense) Credit		(37,358)	(31,042)	(85,417)	(60,252)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		192	332	847	932
Gains and Losses on Available-for-Sale Securities
Interest Expense		29,263	31,644	91,423	95,258
Income Tax (Expense) Credit		(37,358)	(31,042)	(85,417)	(60,252)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		192	332	847	932
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(37,358)	(31,042)	(85,417)	(60,252)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		192	332	847	932
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		192	332	847	932
Southwestern Electric Power Co [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts Reclassified from AOCI		432	567	1,566	1,636
Commodity:
Subtotal - Commodity		665	872	2,409	2,515
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		665	872	2,409	2,515
Reclassifications from AOCI, before Income Tax (Expense) Credit		665	872	2,409	2,515
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		432	567	1,566	1,636
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		665	872	2,409	2,515
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		432	567	1,566	1,636
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		665	872	2,409	2,515
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		432	567	1,566	1,636
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		432	567	1,566	1,636
Southwestern Electric Power Co [Member] | Pension and OPEB [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		3,091	4,325	3,570	4,794
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		(240)	(235)	(719)	(704)
Net Current Period Other Comprehensive Income		(240)	(235)	(719)	(704)
Ending Balance in AOCI		2,851	4,090	2,851	4,090
Commodity:
Subtotal - Commodity		(369)	(360)	(1,106)	(1,082)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(369)	(360)	(1,106)	(1,082)
Reclassifications from AOCI, before Income Tax (Expense) Credit		(369)	(360)	(1,106)	(1,082)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(240)	(235)	(719)	(704)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(369)	(360)	(1,106)	(1,082)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(240)	(235)	(719)	(704)
Amortization of Pension and OPEB
Prior Service Cost (Credit)		(468)	(478)	(1,402)	(1,433)
Actuarial (Gains)/Losses		99	118	296	351
Reclassifications from AOCI, before Income Tax (Expense) Credit		(369)	(360)	(1,106)	(1,082)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(240)	(235)	(719)	(704)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(240)	(235)	(719)	(704)
Southwestern Electric Power Co [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		0	0	0	66
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		0	0	0	(66)
Net Current Period Other Comprehensive Income		0	0	0	(66)
Ending Balance in AOCI		0	0	0	0
Commodity:
Subtotal - Commodity		0	0	0	(101)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		0	0	0	(101)
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(101)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(66)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(101)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(66)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	0	0	(101)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(66)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	0	0	(66)
Southwestern Electric Power Co [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		(9,902)	(12,169)	(11,036)	(13,304)
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		432	567	1,566	1,702
Net Current Period Other Comprehensive Income		432	567	1,566	1,702
Ending Balance in AOCI		(9,470)	(11,602)	(9,470)	(11,602)
Commodity:
Subtotal - Commodity		665	872	2,409	2,616
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		665	872	2,409	2,616
Reclassifications from AOCI, before Income Tax (Expense) Credit		665	872	2,409	2,616
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		432	567	1,566	1,702
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		665	872	2,409	2,616
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		432	567	1,566	1,702
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		665	872	2,409	2,616
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		432	567	1,566	1,702
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		432	567	1,566	1,702
Southwestern Electric Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts Reclassified from AOCI		192
Interest Rate and Foreign Currency:
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		192
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		192
Amortization of Pension and OPEB
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		192
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		192
Southwestern Electric Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		233	305	843	879
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		233	305	843	879
Amortization of Pension and OPEB
Income Tax (Expense) Credit		233	305	843	879
Southwestern Electric Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Pension and OPEB [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts Reclassified from AOCI		(240)	(235)
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		(129)	(125)	(387)	(378)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(240)	(235)
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		(129)	(125)	(387)	(378)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(240)	(235)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(129)	(125)	(387)	(378)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(240)	(235)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(240)	(235)
Southwestern Electric Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Commodity:
Other Operation Expense		0	0	0	(13)
Maintenance Expense		0	0	0	(10)
Property, Plant and Equipment		0	0	0	(11)
Regulatory Assets/(Liabilities), Net	[1]	0	0	0	(67)
Southwestern Electric Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Interest Expense		665	872	2,409	2,616
Gains and Losses on Available-for-Sale Securities
Interest Expense		$ 665	$ 872	$ 2,409	$ 2,616

[1] Represents realized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the condensed balance sheets.