Comprehensive Income (Details) (USD $)	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	$ (337,000,000)
Change in Fair Value Recognized in AOCI	22,000,000
Amounts Reclassified from AOCI	9,000,000
Net Current Period Other Comprehensive Income	31,000,000		(2,000,000)
Ending Balance in AOCI	(306,000,000)
Interest Rate and Foreign Currency:
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	(203,000)
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	9,000,000
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI	(38,000,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI	(14,000,000)
Cash Flow Hedges [Member]
Commodity:
Commodity	5,000,000
Interest Rate and Foreign Currency:
Reclassifications from AOCI, before Income Tax (Expense) Credit	5,000,000
Income Tax (Expense) Credit	2,000,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	3,000,000
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			(23,000,000)
Changes in Fair Value Recognized in AOCI			(19,000,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			(34,000,000)
Utility Operations Revenues [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Other Revenues [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(1,000,000)
Purchased Electricity for Resale [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			7,000,000
Interest Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			1,000,000
Regulatory Assets [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			1,000,000	[1]
Commodity [Member] | Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(8,000,000)
Change in Fair Value Recognized in AOCI	18,000,000
Amounts Reclassified from AOCI	2,000,000
Net Current Period Other Comprehensive Income	20,000,000
Ending Balance in AOCI	12,000,000
Commodity:
Commodity	3,000,000
Interest Rate and Foreign Currency:
Reclassifications from AOCI, before Income Tax (Expense) Credit	3,000,000
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	2,000,000
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			(3,000,000)
Changes in Fair Value Recognized in AOCI			(20,000,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			(16,000,000)
Commodity [Member] | Utility Operations Revenues [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	0
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	0
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Commodity [Member] | Other Revenues [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(3,000,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(3,000,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(1,000,000)
Commodity [Member] | Purchased Electricity for Resale [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	6,000,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	6,000,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			7,000,000
Commodity [Member] | Property Plant and Equipment [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet	0
Commodity [Member] | Interest Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Commodity [Member] | Regulatory Assets [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet	0	[1]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			1,000,000	[1]
Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(30,000,000)
Change in Fair Value Recognized in AOCI	3,000,000
Amounts Reclassified from AOCI	1,000,000
Net Current Period Other Comprehensive Income	4,000,000
Ending Balance in AOCI	(26,000,000)
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	2,000,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	2,000,000
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	1,000,000
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			(20,000,000)
Changes in Fair Value Recognized in AOCI			1,000,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			(18,000,000)
Interest Rate and Foreign Currency [Member] | Utility Operations Revenues [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Interest Rate and Foreign Currency [Member] | Other Revenues [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Interest Rate and Foreign Currency [Member] | Purchased Electricity for Resale [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Interest Rate and Foreign Currency [Member] | Interest Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	2,000,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	2,000,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			1,000,000
Interest Rate and Foreign Currency [Member] | Regulatory Assets [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			0	[1]
Securities Available for Sale [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	4,000,000
Change in Fair Value Recognized in AOCI	1,000,000
Amounts Reclassified from AOCI	0
Net Current Period Other Comprehensive Income	1,000,000
Ending Balance in AOCI	5,000,000
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit	0
Income Tax (Expense) Credit	0
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	0
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	0
Total Accumulated Other Comprehensive Income (Loss) Activity For Other Temporary Investments
Beginning Balance in AOCI			2,000,000
Changes in Fair Value Recognized in AOCI			2,000,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	0
Ending Balance in AOCI			4,000,000
Securities Available for Sale [Member] | Interest Expense [Member]
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit	0
Securities Available for Sale [Member] | Interest Income [Member]
Gains and Losses on Available-for-Sale Securities
Reclassifications from AOCI, before Income Tax (Expense) Credit	0
Reclassifications from AOCI, Net of Income Tax (Expense) Credit			0
Total Accumulated Other Comprehensive Income (Loss) Activity For Other Temporary Investments
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Pension and OPEB [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(303,000,000)
Change in Fair Value Recognized in AOCI	0
Amounts Reclassified from AOCI	6,000,000
Net Current Period Other Comprehensive Income	6,000,000
Ending Balance in AOCI	(297,000,000)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	9,000,000
Income Tax (Expense) Credit	3,000,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	6,000,000
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	6,000,000
Pension and OPEB [Member] | Prior Service Cost (Credit) [Member]
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	(5,000,000)
Pension and OPEB [Member] | Actuarial (Gains) Losses [Member]
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	14,000,000
Appalachian Power Co [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(29,898,000)
Change in Fair Value Recognized in AOCI	793,000
Amounts Reclassified from AOCI	823,000
Net Current Period Other Comprehensive Income	1,616,000		361,000
Ending Balance in AOCI	(28,282,000)
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	823,000
Appalachian Power Co [Member] | Cash Flow Hedges [Member]
Commodity:
Commodity	715,000
Interest Rate and Foreign Currency:
Reclassifications from AOCI, before Income Tax (Expense) Credit	715,000
Income Tax (Expense) Credit	250,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	465,000
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			(285,000)
Changes in Fair Value Recognized in AOCI			(1,845,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			(824,000)
Appalachian Power Co [Member] | Electric Generation, Transmission and Distribution Revenues [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Appalachian Power Co [Member] | Purchased Electricity for Resale [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			219,000
Appalachian Power Co [Member] | Other Operation Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(2,000)
Appalachian Power Co [Member] | Maintenance Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(3,000)
Appalachian Power Co [Member] | Depreciation and Amortization Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Appalachian Power Co [Member] | Property Plant and Equipment [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			(2,000)
Appalachian Power Co [Member] | Interest Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			269,000
Appalachian Power Co [Member] | Regulatory Assets [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			825,000	[1]
Appalachian Power Co [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(644,000)
Change in Fair Value Recognized in AOCI	794,000
Amounts Reclassified from AOCI	211,000
Net Current Period Other Comprehensive Income	1,005,000
Ending Balance in AOCI	361,000
Commodity:
Commodity	325,000
Interest Rate and Foreign Currency:
Reclassifications from AOCI, before Income Tax (Expense) Credit	325,000
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	211,000
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			(1,309,000)
Changes in Fair Value Recognized in AOCI			(1,845,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			(2,117,000)
Appalachian Power Co [Member] | Commodity [Member] | Electric Generation, Transmission and Distribution Revenues [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	20,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	20,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Appalachian Power Co [Member] | Commodity [Member] | Purchased Electricity for Resale [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	57,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	57,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			219,000
Appalachian Power Co [Member] | Commodity [Member] | Other Operation Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(11,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(11,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(2,000)
Appalachian Power Co [Member] | Commodity [Member] | Maintenance Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(16,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(16,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(3,000)
Appalachian Power Co [Member] | Commodity [Member] | Property Plant and Equipment [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet	(14,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			(2,000)
Appalachian Power Co [Member] | Commodity [Member] | Regulatory Assets [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet	289,000	[1]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			825,000	[1]
Appalachian Power Co [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	2,077,000
Change in Fair Value Recognized in AOCI	(1,000)
Amounts Reclassified from AOCI	254,000
Net Current Period Other Comprehensive Income	253,000
Ending Balance in AOCI	2,330,000
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	390,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	390,000
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	254,000
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			1,024,000
Changes in Fair Value Recognized in AOCI			0
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			1,293,000
Appalachian Power Co [Member] | Interest Rate and Foreign Currency [Member] | Depreciation and Amortization Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Appalachian Power Co [Member] | Interest Rate and Foreign Currency [Member] | Interest Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	390,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	390,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			269,000
Appalachian Power Co [Member] | Pension and OPEB [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(31,331,000)
Change in Fair Value Recognized in AOCI	0
Amounts Reclassified from AOCI	358,000
Net Current Period Other Comprehensive Income	358,000
Ending Balance in AOCI	(30,973,000)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	551,000
Income Tax (Expense) Credit	193,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	358,000
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	358,000
Appalachian Power Co [Member] | Pension and OPEB [Member] | Prior Service Cost (Credit) [Member]
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	(1,282,000)
Appalachian Power Co [Member] | Pension and OPEB [Member] | Actuarial (Gains) Losses [Member]
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	1,833,000
Indiana Michigan Power Co [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(28,883,000)
Change in Fair Value Recognized in AOCI	2,781,000
Amounts Reclassified from AOCI	518,000
Net Current Period Other Comprehensive Income	3,299,000		2,735,000
Ending Balance in AOCI	(25,584,000)
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	518,000
Indiana Michigan Power Co [Member] | Cash Flow Hedges [Member]
Commodity:
Commodity	526,000
Interest Rate and Foreign Currency:
Reclassifications from AOCI, before Income Tax (Expense) Credit	526,000
Income Tax (Expense) Credit	184,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	342,000
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			(15,284,000)
Changes in Fair Value Recognized in AOCI			1,602,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			(12,828,000)
Indiana Michigan Power Co [Member] | Electric Generation, Transmission and Distribution Revenues [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Indiana Michigan Power Co [Member] | Purchased Electricity for Resale [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			567,000
Indiana Michigan Power Co [Member] | Other Operation Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(2,000)
Indiana Michigan Power Co [Member] | Maintenance Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(1,000)
Indiana Michigan Power Co [Member] | Depreciation and Amortization Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Indiana Michigan Power Co [Member] | Property Plant and Equipment [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			(1,000)
Indiana Michigan Power Co [Member] | Interest Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			149,000
Indiana Michigan Power Co [Member] | Regulatory Assets [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			142,000	[1]
Indiana Michigan Power Co [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(446,000)
Change in Fair Value Recognized in AOCI	532,000
Amounts Reclassified from AOCI	150,000
Net Current Period Other Comprehensive Income	682,000
Ending Balance in AOCI	236,000
Commodity:
Commodity	230,000
Interest Rate and Foreign Currency:
Reclassifications from AOCI, before Income Tax (Expense) Credit	230,000
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	150,000
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			(819,000)
Changes in Fair Value Recognized in AOCI			(1,394,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			(1,508,000)
Indiana Michigan Power Co [Member] | Commodity [Member] | Electric Generation, Transmission and Distribution Revenues [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	52,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	52,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Indiana Michigan Power Co [Member] | Commodity [Member] | Purchased Electricity for Resale [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	149,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	149,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			567,000
Indiana Michigan Power Co [Member] | Commodity [Member] | Other Operation Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(7,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(7,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(2,000)
Indiana Michigan Power Co [Member] | Commodity [Member] | Maintenance Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(7,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(7,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(1,000)
Indiana Michigan Power Co [Member] | Commodity [Member] | Property Plant and Equipment [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet	(7,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			(1,000)
Indiana Michigan Power Co [Member] | Commodity [Member] | Regulatory Assets [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet	50,000	[1]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			142,000	[1]
Indiana Michigan Power Co [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(19,647,000)
Change in Fair Value Recognized in AOCI	2,249,000
Amounts Reclassified from AOCI	192,000
Net Current Period Other Comprehensive Income	2,441,000
Ending Balance in AOCI	(17,206,000)
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	296,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	296,000
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	192,000
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			(14,465,000)
Changes in Fair Value Recognized in AOCI			2,996,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			(11,320,000)
Indiana Michigan Power Co [Member] | Interest Rate and Foreign Currency [Member] | Depreciation and Amortization Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Indiana Michigan Power Co [Member] | Interest Rate and Foreign Currency [Member] | Interest Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	296,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	296,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			149,000
Indiana Michigan Power Co [Member] | Pension and OPEB [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(8,790,000)
Change in Fair Value Recognized in AOCI	0
Amounts Reclassified from AOCI	176,000
Net Current Period Other Comprehensive Income	176,000
Ending Balance in AOCI	(8,614,000)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	270,000
Income Tax (Expense) Credit	94,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	176,000
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	176,000
Indiana Michigan Power Co [Member] | Pension and OPEB [Member] | Prior Service Cost (Credit) [Member]
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	(199,000)
Indiana Michigan Power Co [Member] | Pension and OPEB [Member] | Actuarial (Gains) Losses [Member]
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	469,000
Ohio Power Co [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(165,725,000)
Change in Fair Value Recognized in AOCI	1,102,000
Amounts Reclassified from AOCI	3,233,000
Net Current Period Other Comprehensive Income	4,335,000		1,500,000
Ending Balance in AOCI	(161,390,000)
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	3,233,000
Ohio Power Co [Member] | Cash Flow Hedges [Member]
Commodity:
Commodity	(55,000)
Interest Rate and Foreign Currency:
Reclassifications from AOCI, before Income Tax (Expense) Credit	(55,000)
Income Tax (Expense) Credit	(19,000)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	(36,000)
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			7,706,000
Changes in Fair Value Recognized in AOCI			(2,877,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			5,965,000
Ohio Power Co [Member] | Electric Generation, Transmission and Distribution Revenues [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Ohio Power Co [Member] | Purchased Electricity for Resale [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			1,486,000
Ohio Power Co [Member] | Other Operation Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(5,000)
Ohio Power Co [Member] | Maintenance Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(2,000)
Ohio Power Co [Member] | Depreciation and Amortization Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			1,000
Ohio Power Co [Member] | Property Plant and Equipment [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			(3,000)
Ohio Power Co [Member] | Interest Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(341,000)
Ohio Power Co [Member] | Regulatory Assets [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			0	[1]
Ohio Power Co [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(912,000)
Change in Fair Value Recognized in AOCI	1,102,000
Amounts Reclassified from AOCI	304,000
Net Current Period Other Comprehensive Income	1,406,000
Ending Balance in AOCI	494,000
Commodity:
Commodity	467,000
Interest Rate and Foreign Currency:
Reclassifications from AOCI, before Income Tax (Expense) Credit	467,000
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	304,000
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			(1,748,000)
Changes in Fair Value Recognized in AOCI			(2,877,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			(3,149,000)
Ohio Power Co [Member] | Commodity [Member] | Electric Generation, Transmission and Distribution Revenues [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	134,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	134,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Ohio Power Co [Member] | Commodity [Member] | Purchased Electricity for Resale [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	382,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	382,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			1,486,000
Ohio Power Co [Member] | Commodity [Member] | Other Operation Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(18,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(18,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(5,000)
Ohio Power Co [Member] | Commodity [Member] | Maintenance Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(12,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(12,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(2,000)
Ohio Power Co [Member] | Commodity [Member] | Property Plant and Equipment [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet	(19,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			(3,000)
Ohio Power Co [Member] | Commodity [Member] | Regulatory Assets [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			0	[1]
Ohio Power Co [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	8,095,000
Change in Fair Value Recognized in AOCI	0
Amounts Reclassified from AOCI	(340,000)
Net Current Period Other Comprehensive Income	(340,000)
Ending Balance in AOCI	7,755,000
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(522,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(522,000)
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	(340,000)
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			9,454,000
Changes in Fair Value Recognized in AOCI			0
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			9,114,000
Ohio Power Co [Member] | Interest Rate and Foreign Currency [Member] | Depreciation and Amortization Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	2,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	2,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			1,000
Ohio Power Co [Member] | Interest Rate and Foreign Currency [Member] | Interest Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(524,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(524,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(341,000)
Ohio Power Co [Member] | Pension and OPEB [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(172,908,000)
Change in Fair Value Recognized in AOCI	0
Amounts Reclassified from AOCI	3,269,000
Net Current Period Other Comprehensive Income	3,269,000
Ending Balance in AOCI	(169,639,000)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	5,029,000
Income Tax (Expense) Credit	1,760,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	3,269,000
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	3,269,000
Ohio Power Co [Member] | Pension and OPEB [Member] | Prior Service Cost (Credit) [Member]
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	(1,468,000)
Ohio Power Co [Member] | Pension and OPEB [Member] | Actuarial (Gains) Losses [Member]
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	6,497,000
Public Service Co Of Oklahoma [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	6,481,000
Change in Fair Value Recognized in AOCI	36,000
Amounts Reclassified from AOCI	(203,000)
Net Current Period Other Comprehensive Income	(167,000)		(53,000)
Ending Balance in AOCI	6,314,000
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	(203,000)
Public Service Co Of Oklahoma [Member] | Cash Flow Hedges [Member]
Commodity:
Commodity	(312,000)
Interest Rate and Foreign Currency:
Reclassifications from AOCI, before Income Tax (Expense) Credit	(312,000)
Income Tax (Expense) Credit	(109,000)
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			7,149,000
Changes in Fair Value Recognized in AOCI			139,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			7,096,000
Public Service Co Of Oklahoma [Member] | Electric Generation, Transmission and Distribution Revenues [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Public Service Co Of Oklahoma [Member] | Purchased Electricity for Resale [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Public Service Co Of Oklahoma [Member] | Other Operation Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(2,000)
Public Service Co Of Oklahoma [Member] | Maintenance Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Public Service Co Of Oklahoma [Member] | Depreciation and Amortization Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Public Service Co Of Oklahoma [Member] | Property Plant and Equipment [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			(1,000)
Public Service Co Of Oklahoma [Member] | Interest Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(189,000)
Public Service Co Of Oklahoma [Member] | Regulatory Assets [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			0	[1]
Public Service Co Of Oklahoma [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	21,000
Change in Fair Value Recognized in AOCI	36,000
Amounts Reclassified from AOCI	(13,000)
Net Current Period Other Comprehensive Income	23,000
Ending Balance in AOCI	44,000
Commodity:
Commodity	(20,000)
Interest Rate and Foreign Currency:
Reclassifications from AOCI, before Income Tax (Expense) Credit	(20,000)
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	(13,000)
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			(69,000)
Changes in Fair Value Recognized in AOCI			139,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			67,000
Public Service Co Of Oklahoma [Member] | Commodity [Member] | Electric Generation, Transmission and Distribution Revenues [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Public Service Co Of Oklahoma [Member] | Commodity [Member] | Purchased Electricity for Resale [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Public Service Co Of Oklahoma [Member] | Commodity [Member] | Other Operation Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(9,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(9,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(2,000)
Public Service Co Of Oklahoma [Member] | Commodity [Member] | Maintenance Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(4,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(4,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Public Service Co Of Oklahoma [Member] | Commodity [Member] | Property Plant and Equipment [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet	(7,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			(1,000)
Public Service Co Of Oklahoma [Member] | Commodity [Member] | Regulatory Assets [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			0	[1]
Public Service Co Of Oklahoma [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	6,460,000
Change in Fair Value Recognized in AOCI	0
Amounts Reclassified from AOCI	(190,000)
Net Current Period Other Comprehensive Income	(190,000)
Ending Balance in AOCI	6,270,000
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(292,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(292,000)
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	(190,000)
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			7,218,000
Changes in Fair Value Recognized in AOCI			0
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			7,029,000
Public Service Co Of Oklahoma [Member] | Interest Rate and Foreign Currency [Member] | Depreciation and Amortization Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Public Service Co Of Oklahoma [Member] | Interest Rate and Foreign Currency [Member] | Interest Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(292,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(292,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(189,000)
Southwestern Electric Power Co [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(17,860,000)
Change in Fair Value Recognized in AOCI	44,000
Amounts Reclassified from AOCI	489,000
Net Current Period Other Comprehensive Income	533,000		(1,610,000)
Ending Balance in AOCI	(17,327,000)
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	489,000
Southwestern Electric Power Co [Member] | Cash Flow Hedges [Member]
Commodity:
Commodity	849,000
Interest Rate and Foreign Currency:
Reclassifications from AOCI, before Income Tax (Expense) Credit	849,000
Income Tax (Expense) Credit	297,000
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	552,000
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			(15,524,000)
Changes in Fair Value Recognized in AOCI			(2,644,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			(17,299,000)
Southwestern Electric Power Co [Member] | Electric Generation, Transmission and Distribution Revenues [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Southwestern Electric Power Co [Member] | Purchased Electricity for Resale [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Southwestern Electric Power Co [Member] | Other Operation Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(2,000)
Southwestern Electric Power Co [Member] | Maintenance Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(1,000)
Southwestern Electric Power Co [Member] | Depreciation and Amortization Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Southwestern Electric Power Co [Member] | Property Plant and Equipment [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			(1,000)
Southwestern Electric Power Co [Member] | Interest Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			873,000
Southwestern Electric Power Co [Member] | Regulatory Assets [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			0	[1]
Southwestern Electric Power Co [Member] | Commodity [Member] | Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	22,000
Change in Fair Value Recognized in AOCI	44,000
Amounts Reclassified from AOCI	(15,000)
Net Current Period Other Comprehensive Income	29,000
Ending Balance in AOCI	51,000
Commodity:
Commodity	(23,000)
Interest Rate and Foreign Currency:
Reclassifications from AOCI, before Income Tax (Expense) Credit	(23,000)
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	(15,000)
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			(62,000)
Changes in Fair Value Recognized in AOCI			132,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			66,000
Southwestern Electric Power Co [Member] | Commodity [Member] | Electric Generation, Transmission and Distribution Revenues [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Southwestern Electric Power Co [Member] | Commodity [Member] | Purchased Electricity for Resale [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Southwestern Electric Power Co [Member] | Commodity [Member] | Other Operation Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(10,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(10,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(2,000)
Southwestern Electric Power Co [Member] | Commodity [Member] | Maintenance Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	(6,000)
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	(6,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			(1,000)
Southwestern Electric Power Co [Member] | Commodity [Member] | Property Plant and Equipment [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet	(7,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			(1,000)
Southwestern Electric Power Co [Member] | Commodity [Member] | Regulatory Assets [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI within Balance Sheet			0	[1]
Southwestern Electric Power Co [Member] | Interest Rate and Foreign Currency [Member] | Cash Flow Hedges [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(15,571,000)
Change in Fair Value Recognized in AOCI	0
Amounts Reclassified from AOCI	567,000
Net Current Period Other Comprehensive Income	567,000
Ending Balance in AOCI	(15,004,000)
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	872,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	872,000
Amortization of Pension and OPEB
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	567,000
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
Beginning Balance in AOCI			(15,462,000)
Changes in Fair Value Recognized in AOCI			(2,776,000)
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Ending Balance in AOCI			(17,365,000)
Southwestern Electric Power Co [Member] | Interest Rate and Foreign Currency [Member] | Depreciation and Amortization Expense [Member] | Cash Flow Hedges [Member]
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			0
Southwestern Electric Power Co [Member] | Interest Rate and Foreign Currency [Member] | Interest Expense [Member] | Cash Flow Hedges [Member]
Commodity:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income	872,000
Interest Rate and Foreign Currency:
Interest Rate and Foreign Currency	872,000
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income/within Balance Sheet:
Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income			873,000
Southwestern Electric Power Co [Member] | Pension and OPEB [Member]
Changes in Accumulated Other Comprehensive Income (Loss) by Component
Beginning Balance in AOCI	(2,311,000)
Change in Fair Value Recognized in AOCI	0
Amounts Reclassified from AOCI	(63,000)
Net Current Period Other Comprehensive Income	(63,000)
Ending Balance in AOCI	(2,374,000)
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	(97,000)
Income Tax (Expense) Credit	(34,000)
Reclassifications from AOCI, Net of Income Tax (Expense) Credit	(63,000)
Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit	(63,000)
Southwestern Electric Power Co [Member] | Pension and OPEB [Member] | Prior Service Cost (Credit) [Member]
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	(445,000)
Southwestern Electric Power Co [Member] | Pension and OPEB [Member] | Actuarial (Gains) Losses [Member]
Amortization of Pension and OPEB
Reclassifications from AOCI, before Income Tax (Expense) Credit	$ 348,000

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