Comprehensive Income (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		$ (103,000)	$ (109,000)	$ (103,000)	$ (115,000)
Change in Fair Value Recognized in AOCI		(2,000)	4,000	2,000	(10,000)
Amounts Reclassified from AOCI		3,000	1,000	(6,000)	21,000
Net Current Period Other Comprehensive Income		1,000	5,000	(4,000)	11,000
Pension and OPEB Adjustment Related to Mitchell Plant				5,000
Ending Balance in AOCI		(102,000)	(104,000)	(102,000)	(104,000)
Commodity:
Generation & Marketing Revenues		147,000	171,000	303,000	288,000
Purchased Electricity for Resale		601,000	473,000	1,319,000	1,111,000
Other Operation Expense		695,000	760,000	1,441,000	1,540,000
Maintenance Expense		333,000	340,000	627,000	632,000
Interest Rate and Foreign Currency:
Depreciation and Amortization Expense		506,000	443,000	1,011,000	934,000
Interest Expense		224,000	221,000	447,000	441,000
Income Tax (Expense) Credit		(225,000)	(215,000)	(558,000)	(522,000)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		3,000	1,000	(6,000)	21,000
Gains and Losses on Available-for-Sale Securities
Interest Expense		224,000	221,000	447,000	441,000
Income Tax (Expense) Credit		(225,000)	(215,000)	(558,000)	(522,000)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		3,000	1,000	(6,000)	21,000
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(225,000)	(215,000)	(558,000)	(522,000)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		3,000	1,000	(6,000)	21,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		3,000	1,000	(6,000)	21,000
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts Reclassified from AOCI		2,000	0	(7,000)	19,000
Commodity:
Subtotal - Commodity		3,000	0	(10,000)	30,000
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		3,000	0	(10,000)	30,000
Reclassifications from AOCI, before Income Tax (Expense) Credit		3,000	0	(10,000)	30,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2,000	0	(7,000)	19,000
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		3,000	0	(10,000)	30,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2,000	0	(7,000)	19,000
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		3,000	0	(10,000)	30,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2,000	0	(7,000)	19,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2,000	0	(7,000)	19,000
Securities Available for Sale [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		9,000	7,000	8,000	7,000
Change in Fair Value Recognized in AOCI		(1,000)	1,000	0	1,000
Amounts Reclassified from AOCI		0	0	0	0
Net Current Period Other Comprehensive Income		(1,000)	1,000	0	1,000
Pension and OPEB Adjustment Related to Mitchell Plant				0
Ending Balance in AOCI		8,000	8,000	8,000	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		(88,000)	(98,000)	(93,000)	(99,000)
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		1,000	1,000	1,000	2,000
Net Current Period Other Comprehensive Income		1,000	1,000	1,000	2,000
Pension and OPEB Adjustment Related to Mitchell Plant				5,000
Ending Balance in AOCI		(87,000)	(97,000)	(87,000)	(97,000)
Commodity:
Subtotal - Commodity		1,000	2,000	1,000	4,000
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		1,000	2,000	1,000	4,000
Reclassifications from AOCI, before Income Tax (Expense) Credit		1,000	2,000	1,000	4,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		1,000	1,000	1,000	2,000
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		1,000	2,000	1,000	4,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		1,000	1,000	1,000	2,000
Amortization of Pension and OPEB
Prior Service Cost (Credit)		(5,000)	(5,000)	(10,000)	(10,000)
Actuarial (Gains)/Losses		6,000	7,000	11,000	14,000
Reclassifications from AOCI, before Income Tax (Expense) Credit		1,000	2,000	1,000	4,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		1,000	1,000	1,000	2,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		1,000	1,000	1,000	2,000
Commodity [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		(6,000)	4,000	1,000	0
Change in Fair Value Recognized in AOCI		(1,000)	3,000	2,000	(11,000)
Amounts Reclassified from AOCI		2,000	(1,000)	(8,000)	17,000
Net Current Period Other Comprehensive Income		1,000	2,000	(6,000)	6,000
Pension and OPEB Adjustment Related to Mitchell Plant				0
Ending Balance in AOCI		(5,000)	6,000	(5,000)	6,000
Commodity:
Subtotal - Commodity		3,000	(2,000)	(11,000)	26,000
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		3,000	(2,000)	(11,000)	26,000
Reclassifications from AOCI, before Income Tax (Expense) Credit		3,000	(2,000)	(11,000)	26,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2,000	(1,000)	(8,000)	17,000
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		3,000	(2,000)	(11,000)	26,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2,000	(1,000)	(8,000)	17,000
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		3,000	(2,000)	(11,000)	26,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2,000	(1,000)	(8,000)	17,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2,000	(1,000)	(8,000)	17,000
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)	(22,000)	(19,000)	(23,000)
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		0	1,000	1,000	2,000
Net Current Period Other Comprehensive Income		0	1,000	1,000	2,000
Pension and OPEB Adjustment Related to Mitchell Plant				0
Ending Balance in AOCI		(18,000)	(21,000)	(18,000)	(21,000)
Commodity:
Subtotal - Commodity		0	2,000	1,000	4,000
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		0	2,000	1,000	4,000
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	2,000	1,000	4,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	1,000	1,000	2,000
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	2,000	1,000	4,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	1,000	1,000	2,000
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	2,000	1,000	4,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	1,000	1,000	2,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	1,000	1,000	2,000
Reclassifications from Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		1,000	0	(3,000)	11,000
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		1,000	0	(3,000)	11,000
Amortization of Pension and OPEB
Income Tax (Expense) Credit		1,000	0	(3,000)	11,000
Reclassifications from Accumulated Other Comprehensive Income [Member] | Pension and OPEB [Member]
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		0	1,000	0	2,000
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		0	1,000	0	2,000
Amortization of Pension and OPEB
Income Tax (Expense) Credit		0	1,000	0	2,000
Reclassifications from Accumulated Other Comprehensive Income [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Commodity:
Generation & Marketing Revenues		(4,000)	0	(17,000)	0
Purchased Electricity for Resale		7,000	(2,000)	6,000	29,000
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	4,000
Gains and Losses on Available-for-Sale Securities
Interest Expense		0	2,000	1,000	4,000
Appalachian Power Co [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		4,703	2,864	5,032	2,951
Change in Fair Value Recognized in AOCI		0	103	0	1,686
Amounts Reclassified from AOCI		(456)	(270)	(785)	(1,940)
Net Current Period Other Comprehensive Income		(456)	(167)	(785)	(254)
Ending Balance in AOCI		4,247	2,697	4,247	2,697
Commodity:
Generation & Marketing Revenues		2,692	2,547	5,013	4,567
Purchased Electricity for Resale		65,715	86,033	178,384	255,024
Other Operation Expense		103,720	99,896	209,790	193,434
Maintenance Expense		57,037	69,484	109,334	129,574
Interest Rate and Foreign Currency:
Depreciation and Amortization Expense		96,297	95,650	196,440	200,236
Interest Expense		48,684	53,130	98,975	104,802
Income Tax (Expense) Credit		(42,713)	(23,577)	(127,861)	(89,825)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(456)	(270)	(785)	(1,940)
Gains and Losses on Available-for-Sale Securities
Interest Expense		48,684	53,130	98,975	104,802
Income Tax (Expense) Credit		(42,713)	(23,577)	(127,861)	(89,825)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(456)	(270)	(785)	(1,940)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(42,713)	(23,577)	(127,861)	(89,825)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(456)	(270)	(785)	(1,940)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(456)	(270)	(785)	(1,940)
Appalachian Power Co [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts Reclassified from AOCI		2	63	131	(1,274)
Commodity:
Subtotal - Commodity		3	98	202	(1,958)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		3	98	202	(1,958)
Reclassifications from AOCI, before Income Tax (Expense) Credit		3	98	202	(1,958)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2	63	131	(1,274)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		3	98	202	(1,958)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2	63	131	(1,274)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		3	98	202	(1,958)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2	63	131	(1,274)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2	63	131	(1,274)
Appalachian Power Co [Member] | Pension and OPEB [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		678	(566)	1,136	(233)
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		(458)	(333)	(916)	(666)
Net Current Period Other Comprehensive Income		(458)	(333)	(916)	(666)
Ending Balance in AOCI		220	(899)	220	(899)
Commodity:
Subtotal - Commodity		(705)	(513)	(1,409)	(1,025)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(705)	(513)	(1,409)	(1,025)
Reclassifications from AOCI, before Income Tax (Expense) Credit		(705)	(513)	(1,409)	(1,025)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(458)	(333)	(916)	(666)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(705)	(513)	(1,409)	(1,025)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(458)	(333)	(916)	(666)
Amortization of Pension and OPEB
Prior Service Cost (Credit)		(1,283)	(1,283)	(2,565)	(2,565)
Actuarial (Gains)/Losses		578	770	1,156	1,540
Reclassifications from AOCI, before Income Tax (Expense) Credit		(705)	(513)	(1,409)	(1,025)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(458)	(333)	(916)	(666)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(458)	(333)	(916)	(666)
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	87	0	94
Change in Fair Value Recognized in AOCI		0	103	0	1,686
Amounts Reclassified from AOCI		0	(190)	0	(1,780)
Net Current Period Other Comprehensive Income		0	(87)	0	(94)
Ending Balance in AOCI		0	0	0	0
Commodity:
Subtotal - Commodity		0	(292)	0	(2,738)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		0	(292)	0	(2,738)
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	(292)	0	(2,738)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	(190)	0	(1,780)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	(292)	0	(2,738)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	(190)	0	(1,780)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	(292)	0	(2,738)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	(190)	0	(1,780)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	(190)	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		4,025	3,343	3,896	3,090
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		2	253	131	506
Net Current Period Other Comprehensive Income		2	253	131	506
Ending Balance in AOCI		4,027	3,596	4,027	3,596
Commodity:
Subtotal - Commodity		3	390	202	780
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		3	390	202	780
Reclassifications from AOCI, before Income Tax (Expense) Credit		3	390	202	780
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2	253	131	506
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		3	390	202	780
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2	253	131	506
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		3	390	202	780
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2	253	131	506
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		2	253	131	506
Appalachian Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		1	35	71	(684)
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		1	35	71	(684)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		1	35	71	(684)
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)	(180)	(493)	(359)
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		(247)	(180)	(493)	(359)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(247)	(180)	(493)	(359)
Appalachian Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Commodity:
Purchased Electricity for Resale		0	(64)	0	(526)
Other Operation Expense				0	(10)
Maintenance Expense				0	(20)
Property, Plant and Equipment				0	(17)
Regulatory Assets/(Liabilities), Net	[1]	0	(228)	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		3	390	202	780
Gains and Losses on Available-for-Sale Securities
Interest Expense		3	390	202	780
Indiana Michigan Power Co [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		(14,081)	(15,041)	(14,360)	(15,509)
Change in Fair Value Recognized in AOCI		0	68	0	1,130
Amounts Reclassified from AOCI		278	325	557	(269)
Net Current Period Other Comprehensive Income		278	393	557	861
Ending Balance in AOCI		(13,803)	(14,648)	(13,803)	(14,648)
Commodity:
Generation & Marketing Revenues		812	549	1,840	549
Purchased Electricity for Resale		50,260	27,086	106,167	32,448
Other Operation Expense		137,306	146,272	266,266	287,622
Maintenance Expense		59,829	54,246	107,180	102,811
Interest Rate and Foreign Currency:
Depreciation and Amortization Expense		49,540	49,446	100,947	99,477
Interest Expense		22,968	23,705	45,745	49,338
Income Tax (Expense) Credit		(24,264)	(12,627)	(59,034)	(50,942)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		278	325	557	(269)
Gains and Losses on Available-for-Sale Securities
Interest Expense		22,968	23,705	45,745	49,338
Income Tax (Expense) Credit		(24,264)	(12,627)	(59,034)	(50,942)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		278	325	557	(269)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(24,264)	(12,627)	(59,034)	(50,942)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		278	325	557	(269)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		278	325	557	(269)
Indiana Michigan Power Co [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts Reclassified from AOCI		268	282	535	(355)
Commodity:
Subtotal - Commodity		411	433	822	(547)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		411	433	822	(547)
Reclassifications from AOCI, before Income Tax (Expense) Credit		411	433	822	(547)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		268	282	535	(355)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		411	433	822	(547)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		268	282	535	(355)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		411	433	822	(547)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		268	282	535	(355)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		268	282	535	(355)
Indiana Michigan Power Co [Member] | Pension and OPEB [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		58	464	46	421
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		10	43	22	86
Net Current Period Other Comprehensive Income		10	43	22	86
Ending Balance in AOCI		68	507	68	507
Commodity:
Subtotal - Commodity		16	64	34	130
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		16	64	34	130
Reclassifications from AOCI, before Income Tax (Expense) Credit		16	64	34	130
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		10	43	22	86
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		16	64	34	130
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		10	43	22	86
Amortization of Pension and OPEB
Prior Service Cost (Credit)		(199)	(198)	(398)	(397)
Actuarial (Gains)/Losses		215	262	432	527
Reclassifications from AOCI, before Income Tax (Expense) Credit		16	64	34	130
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		10	43	22	86
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		10	43	22	86
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	61	0	46
Change in Fair Value Recognized in AOCI		0	68	0	1,130
Amounts Reclassified from AOCI		0	(129)	0	(1,176)
Net Current Period Other Comprehensive Income		0	(61)	0	(46)
Ending Balance in AOCI		0	0	0	0
Commodity:
Subtotal - Commodity		0	(198)	0	(1,809)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		0	(198)	0	(1,809)
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	(198)	0	(1,809)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	(129)	0	(1,176)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	(198)	0	(1,809)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	(129)	0	(1,176)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		0	(198)	0	(1,809)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	(129)	0	(1,176)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		0	(129)	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		(14,139)	(15,566)	(14,406)	(15,976)
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		268	411	535	821
Net Current Period Other Comprehensive Income		268	411	535	821
Ending Balance in AOCI		(13,871)	(15,155)	(13,871)	(15,155)
Commodity:
Subtotal - Commodity		411	631	822	1,262
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		411	631	822	1,262
Reclassifications from AOCI, before Income Tax (Expense) Credit		411	631	822	1,262
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		268	411	535	821
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		411	631	822	1,262
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		268	411	535	821
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		411	631	822	1,262
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		268	411	535	821
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		268	411	535	821
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		143	151	287	(192)
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		143	151	287	(192)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		143	151	287	(192)
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		10	43
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		6	21	12	44
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		10	43
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		6	21	12	44
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		10	43
Amortization of Pension and OPEB
Income Tax (Expense) Credit		6	21	12	44
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		10	43
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		10	43
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	(95)	0	(812)
Other Operation Expense				0	(7)
Maintenance Expense				0	(7)
Property, Plant and Equipment				0	(10)
Regulatory Assets/(Liabilities), Net	[1]	0	(103)	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		411	631	822	1,262
Gains and Losses on Available-for-Sale Securities
Interest Expense		411	631	822	1,262
Ohio Power Co [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		5,259	6,631	5,602	7,079
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		(343)	(343)	(686)	(791)
Net Current Period Other Comprehensive Income		(343)	(343)	(686)	(791)
Ending Balance in AOCI		4,916	6,288	4,916	6,288
Commodity:
Generation & Marketing Revenues		2,346	1,756	4,463	3,064
Purchased Electricity for Resale		116,434	64,059	258,514	143,189
Other Operation Expense		129,829	131,485	276,673	282,911
Maintenance Expense		34,214	48,590	81,787	83,241
Interest Rate and Foreign Currency:
Depreciation and Amortization Expense		55,640	51,485	114,852	110,184
Interest Expense		31,271	32,759	63,720	65,766
Income Tax (Expense) Credit		(26,213)	(35,842)	(62,100)	(69,894)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(343)	(343)	(686)	(791)
Gains and Losses on Available-for-Sale Securities
Interest Expense		31,271	32,759	63,720	65,766
Income Tax (Expense) Credit		(26,213)	(35,842)	(62,100)	(69,894)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(343)	(343)	(686)	(791)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(26,213)	(35,842)	(62,100)	(69,894)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(343)	(343)	(686)	(791)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(343)	(343)	(686)	(791)
Ohio Power Co [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts Reclassified from AOCI		(343)	(343)	(686)	(791)
Commodity:
Subtotal - Commodity		(527)	(527)	(1,054)	(1,216)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(527)	(527)	(1,054)	(1,216)
Reclassifications from AOCI, before Income Tax (Expense) Credit		(527)	(527)	(1,054)	(1,216)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(343)	(343)	(686)	(791)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(527)	(527)	(1,054)	(1,216)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(343)	(343)	(686)	(791)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		(527)	(527)	(1,054)	(1,216)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(343)	(343)	(686)	(791)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(343)	(343)	(686)	(791)
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		5,259	6,631	5,602	6,974
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		(343)	(343)	(686)	(686)
Net Current Period Other Comprehensive Income		(343)	(343)	(686)	(686)
Ending Balance in AOCI		4,916	6,288	4,916	6,288
Commodity:
Subtotal - Commodity		(527)	(527)	(1,054)	(1,054)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(527)	(527)	(1,054)	(1,054)
Reclassifications from AOCI, before Income Tax (Expense) Credit		(527)	(527)	(1,054)	(1,054)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(343)	(343)	(686)	(686)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(527)	(527)	(1,054)	(1,054)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(343)	(343)	(686)	(686)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		(527)	(527)	(1,054)	(1,054)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(343)	(343)	(686)	(686)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(343)	(343)	(686)	(686)
Ohio Power Co [Member] | Reclassifications from Accumulated Other Comprehensive Income [Member] | Cash Flow Hedges [Member]
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		(184)	(184)	(368)	(425)
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		(184)	(184)	(368)	(425)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(184)	(184)	(368)	(425)
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		(3)	(3)	(6)	(6)
Interest Expense		(524)	(524)	(1,048)	(1,048)
Gains and Losses on Available-for-Sale Securities
Interest Expense		(524)	(524)	(1,048)	(1,048)
Public Service Co Of Oklahoma [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		4,753	5,512	4,943	5,758
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		(190)	(190)	(380)	(436)
Net Current Period Other Comprehensive Income		(190)	(190)	(380)	(436)
Ending Balance in AOCI		4,563	5,322	4,563	5,322
Commodity:
Generation & Marketing Revenues		729	1,437	1,549	1,515
Purchased Electricity for Resale		85,036	104,604	150,559	184,295
Other Operation Expense		61,028	62,785	121,793	121,496
Maintenance Expense		25,943	29,678	47,083	54,423
Interest Rate and Foreign Currency:
Depreciation and Amortization Expense		29,782	24,607	59,316	48,589
Interest Expense		14,852	13,779	29,422	27,096
Income Tax (Expense) Credit		(15,921)	(13,244)	(23,962)	(18,233)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(190)	(190)	(380)	(436)
Gains and Losses on Available-for-Sale Securities
Interest Expense		14,852	13,779	29,422	27,096
Income Tax (Expense) Credit		(15,921)	(13,244)	(23,962)	(18,233)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(190)	(190)	(380)	(436)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(15,921)	(13,244)	(23,962)	(18,233)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(190)	(190)	(380)	(436)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(190)	(190)	(380)	(436)
Public Service Co Of Oklahoma [Member] | Cash Flow Hedges [Member]
Commodity:
Subtotal - Commodity		(292)	(292)	(584)	(672)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(292)	(292)	(584)	(672)
Reclassifications from AOCI, before Income Tax (Expense) Credit		(292)	(292)	(584)	(672)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(292)	(292)	(584)	(672)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		(292)	(292)	(584)	(672)
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		4,753	5,512	4,943	5,701
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		(190)	(190)	(380)	(379)
Net Current Period Other Comprehensive Income		(190)	(190)	(380)	(379)
Ending Balance in AOCI		4,563	5,322	4,563	5,322
Commodity:
Subtotal - Commodity		(292)	(292)	(584)	(584)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(292)	(292)	(584)	(584)
Reclassifications from AOCI, before Income Tax (Expense) Credit		(292)	(292)	(584)	(584)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(190)	(190)	(380)	(379)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(292)	(292)	(584)	(584)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(190)	(190)	(380)	(379)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		(292)	(292)	(584)	(584)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(190)	(190)	(380)	(379)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(190)	(190)	(380)	(379)
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				(380)	(436)
Interest Rate and Foreign Currency:
Reclassifications from AOCI, Net of Income Tax (Expense) Credit				(380)	(436)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, Net of Income Tax (Expense) Credit				(380)	(436)
Amortization of Pension and OPEB
Reclassifications from AOCI, Net of Income Tax (Expense) Credit				(380)	(436)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit				(380)	(436)
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)	(204)	(236)
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		(102)	(102)	(204)	(236)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(102)	(102)	(204)	(236)
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		(292)	(292)	(584)	(584)
Gains and Losses on Available-for-Sale Securities
Interest Expense		(292)	(292)	(584)	(584)
Southwestern Electric Power Co [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		(7,139)	(8,176)	(7,466)	(8,444)
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		328	332	655	600
Net Current Period Other Comprehensive Income		328	332	655	600
Ending Balance in AOCI		(6,811)	(7,844)	(6,811)	(7,844)
Commodity:
Generation & Marketing Revenues		364	684	868	1,049
Purchased Electricity for Resale		27,188	40,255	47,202	101,420
Other Operation Expense		67,899	69,304	133,444	137,841
Maintenance Expense		38,237	33,668	65,651	64,079
Interest Rate and Foreign Currency:
Depreciation and Amortization Expense		47,964	45,864	94,918	91,525
Interest Expense		31,945	31,738	62,160	63,614
Income Tax (Expense) Credit		(26,887)	(17,045)	(48,059)	(29,210)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		328	332	655	600
Gains and Losses on Available-for-Sale Securities
Interest Expense		31,945	31,738	62,160	63,614
Income Tax (Expense) Credit		(26,887)	(17,045)	(48,059)	(29,210)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		328	332	655	600
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(26,887)	(17,045)	(48,059)	(29,210)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		328	332	655	600
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		328	332	655	600
Southwestern Electric Power Co [Member] | Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Amounts Reclassified from AOCI		567	567	1,134	1,069
Commodity:
Subtotal - Commodity		872	872	1,744	1,643
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		872	872	1,744	1,643
Reclassifications from AOCI, before Income Tax (Expense) Credit		872	872	1,744	1,643
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		567	567	1,134	1,069
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		872	872	1,744	1,643
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		567	567	1,134	1,069
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		872	872	1,744	1,643
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		567	567	1,134	1,069
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		567	567	1,134	1,069
Southwestern Electric Power Co [Member] | Pension and OPEB [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance in AOCI		3,330	4,560	3,570	4,794
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		(239)	(235)	(479)	(469)
Net Current Period Other Comprehensive Income		(239)	(235)	(479)	(469)
Ending Balance in AOCI		3,091	4,325	3,091	4,325
Commodity:
Subtotal - Commodity		(368)	(362)	(737)	(722)
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		(368)	(362)	(737)	(722)
Reclassifications from AOCI, before Income Tax (Expense) Credit		(368)	(362)	(737)	(722)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(239)	(235)	(479)	(469)
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		(368)	(362)	(737)	(722)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(239)	(235)	(479)	(469)
Amortization of Pension and OPEB
Prior Service Cost (Credit)		(467)	(477)	(934)	(955)
Actuarial (Gains)/Losses		99	115	197	233
Reclassifications from AOCI, before Income Tax (Expense) Credit		(368)	(362)	(737)	(722)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(239)	(235)	(479)	(469)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(239)	(235)	(479)	(469)
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		(10,469)	(12,736)	(11,036)	(13,304)
Change in Fair Value Recognized in AOCI		0	0	0	0
Amounts Reclassified from AOCI		567	567	1,134	1,135
Net Current Period Other Comprehensive Income		567	567	1,134	1,135
Ending Balance in AOCI		(9,902)	(12,169)	(9,902)	(12,169)
Commodity:
Subtotal - Commodity		872	872	1,744	1,744
Interest Rate and Foreign Currency:
Subtotal - Interest Rate and Foreign Currency		872	872	1,744	1,744
Reclassifications from AOCI, before Income Tax (Expense) Credit		872	872	1,744	1,744
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		567	567	1,134	1,135
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit		872	872	1,744	1,744
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		567	567	1,134	1,135
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit		872	872	1,744	1,744
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		567	567	1,134	1,135
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		567	567	1,134	1,135
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		328
Interest Rate and Foreign Currency:
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		328
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		328
Amortization of Pension and OPEB
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		328
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		328
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		305	305	610	574
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		305	305	610	574
Amortization of Pension and OPEB
Income Tax (Expense) Credit		305	305	610	574
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		(239)	(235)
Interest Rate and Foreign Currency:
Income Tax (Expense) Credit		(129)	(127)	(258)	(253)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(239)	(235)
Gains and Losses on Available-for-Sale Securities
Income Tax (Expense) Credit		(129)	(127)	(258)	(253)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(239)	(235)
Amortization of Pension and OPEB
Income Tax (Expense) Credit		(129)	(127)	(258)	(253)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(239)	(235)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit		(239)	(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		872	872	1,744	1,744
Gains and Losses on Available-for-Sale Securities
Interest Expense		$ 872	$ 872	$ 1,744	$ 1,744

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