Rate Matters (Details) (USD $)	3 Months Ended		9 Months Ended											9 Months Ended			9 Months Ended																					9 Months Ended			9 Months Ended													3 Months Ended		9 Months Ended											3 Months Ended		9 Months Ended																							9 Months Ended			9 Months Ended			9 Months Ended																													9 Months Ended				9 Months Ended	1 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended					9 Months Ended						9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Sep. 30, 2012 Regulatory Assets Not Yet Being Recovered [Member]	Dec. 31, 2011 Regulatory Assets Not Yet Being Recovered [Member]	Sep. 30, 2012 Storm Costs [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Earning Return [Member]	Dec. 31, 2011 Storm Costs [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Earning Return [Member]	Sep. 30, 2012 Storm Costs [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Storm Costs [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Mountaineer Carbon Capture and Storage Product Validation Facility [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Mountaineer Carbon Capture and Storage Product Validation Facility [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Virginia Environmental Rate Adjustment Clause [Member]	Sep. 30, 2012 Virginia Environmental Rate Adjustment Clause [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Virginia Environmental Rate Adjustment Clause [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Virginia Generation Rate Adjustment Clause [Member]	Sep. 30, 2012 Virginia Deferred Wind Power Costs [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Virginia Deferred Wind Power Costs [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Special Rate Mechanism for Century Aluminum [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Special Rate Mechanism for Century Aluminum [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Other Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Earning Return [Member]	Dec. 31, 2011 Other Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Earning Return [Member]	Sep. 30, 2012 Other Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Other Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Litigation Settlement [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Litigation Settlement [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Economic Development Rider [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Earning Return [Member]	Dec. 31, 2011 Economic Development Rider [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Earning Return [Member]	Sep. 30, 2012 Appalachian Power Co [Member]	Dec. 31, 2011 Appalachian Power Co [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Regulatory Assets Not Yet Being Recovered [Member]	Dec. 31, 2011 Appalachian Power Co [Member] Regulatory Assets Not Yet Being Recovered [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Storm Costs [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Appalachian Power Co [Member] Storm Costs [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Mountaineer Carbon Capture and Storage Product Validation Facility [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Appalachian Power Co [Member] Mountaineer Carbon Capture and Storage Product Validation Facility [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Virginia Environmental Rate Adjustment Clause [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Virginia Environmental Rate Adjustment Clause [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Appalachian Power Co [Member] Virginia Environmental Rate Adjustment Clause [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Virginia Generation Rate Adjustment Clause [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Virginia Deferred Wind Power Costs [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Appalachian Power Co [Member] Virginia Deferred Wind Power Costs [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Special Rate Mechanism for Century Aluminum [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Appalachian Power Co [Member] Special Rate Mechanism for Century Aluminum [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Other Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Appalachian Power Co [Member] Other Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Dresden Operating Costs [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Appalachian Power Co [Member] Dresden Operating Costs [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Transmission Agreement Phase-In [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Appalachian Power Co [Member] Transmission Agreement Phase-In [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Appalachian Power Co [Member] Mountaineer Carbon Capture and Storage Commercial Scale Facility [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Appalachian Power Co [Member] Mountaineer Carbon Capture and Storage Commercial Scale Facility [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member]	Sep. 30, 2011 Southwestern Electric Power Co [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member]	Sep. 30, 2011 Southwestern Electric Power Co [Member]	Dec. 31, 2011 Southwestern Electric Power Co [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Regulatory Assets Not Yet Being Recovered [Member]	Dec. 31, 2011 Southwestern Electric Power Co [Member] Regulatory Assets Not Yet Being Recovered [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Other Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Southwestern Electric Power Co [Member] Other Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Mountaineer Carbon Capture and Storage Commercial Scale Facility [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Southwestern Electric Power Co [Member] Mountaineer Carbon Capture and Storage Commercial Scale Facility [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Southwestern Electric Power Co [Member] Rate Case Expenses [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Southwestern Electric Power Co [Member] Rate Case Expenses [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Ohio Power Co [Member]	Sep. 30, 2011 Ohio Power Co [Member]	Sep. 30, 2012 Ohio Power Co [Member]	Sep. 30, 2011 Ohio Power Co [Member]	Dec. 31, 2011 Ohio Power Co [Member]	Sep. 30, 2012 Ohio Power Co [Member] Regulatory Assets Not Yet Being Recovered [Member]	Dec. 31, 2011 Ohio Power Co [Member] Regulatory Assets Not Yet Being Recovered [Member]	Sep. 30, 2012 Ohio Power Co [Member] Storm Costs [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Ohio Power Co [Member] Storm Costs [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Ohio Power Co [Member] Economic Development Rider [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Earning Return [Member]	Dec. 31, 2011 Ohio Power Co [Member] Economic Development Rider [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Earning Return [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member]	Dec. 31, 2011 Public Service Co Of Oklahoma [Member]	Sep. 30, 2012 Public Service Co Of Oklahoma [Member] Regulatory Assets Not Yet Being Recovered [Member]	Dec. 31, 2011 Public Service Co Of Oklahoma [Member] Regulatory Assets Not Yet Being Recovered [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member]	Dec. 31, 2011 Indiana Michigan Power Co [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member] Regulatory Assets Not Yet Being Recovered [Member]	Dec. 31, 2011 Indiana Michigan Power Co [Member] Regulatory Assets Not Yet Being Recovered [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member] Other Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Indiana Michigan Power Co [Member] Other Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member] Litigation Settlement [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Indiana Michigan Power Co [Member] Litigation Settlement [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Indiana Michigan Power Co [Member] Mountaineer Carbon Capture and Storage Commercial Scale Facility [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Indiana Michigan Power Co [Member] Mountaineer Carbon Capture and Storage Commercial Scale Facility [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Ohio Electric Security Plan Filing [Member]	Sep. 30, 2012 Ohio Electric Security Plan Filing [Member] Storm Costs [Member]	Sep. 30, 2012 Ohio Electric Security Plan Filing [Member] Deferred Fuel Costs [Member]	Sep. 30, 2012 Ohio Electric Security Plan Filing [Member] Ohio Power Co [Member]	Sep. 30, 2012 Ohio Electric Security Plan Filing [Member] Ohio Power Co [Member] Storm Costs [Member]	Sep. 30, 2012 Ohio Electric Security Plan Filing [Member] Ohio Power Co [Member] Deferred Fuel Costs [Member]	Sep. 30, 2012 Ohio Electric Security Plan Filing [Member] Significantly Excessive Earnings Test - 2009 [Member]	Sep. 30, 2012 Ohio Electric Security Plan Filing [Member] Significantly Excessive Earnings Test - 2009 [Member] Ohio Power Co [Member]	Sep. 30, 2012 Ohio Electric Security Plan Filing [Member] Significantly Excessive Earnings Test - 2010 [Member]	Sep. 30, 2012 Ohio Electric Security Plan Filing [Member] Significantly Excessive Earnings Test - 2010 [Member] Ohio Power Co [Member]	Sep. 30, 2012 Ohio Distribution Base Rate Case [Member]	Sep. 30, 2012 Ohio Distribution Base Rate Case [Member] Ohio Power Co [Member]	Sep. 30, 2012 Ohio Fuel Adjustment Clause Audit - 2009 [Member]	Sep. 30, 2012 Ohio Fuel Adjustment Clause Audit - 2009 [Member] Ohio Power Co [Member]	Sep. 30, 2012 Ohio Fuel Adjustment Clause Audit - 2010 and 2011 [Member]	Sep. 30, 2012 Ohio Fuel Adjustment Clause Audit - 2010 and 2011 [Member] Ohio Power Co [Member]	Sep. 30, 2012 Ormet Interim Arrangement [Member]	Sep. 30, 2012 Ormet Interim Arrangement [Member] Ohio Power Co [Member]	Sep. 30, 2012 Ohio IGCC Plant [Member]	Sep. 30, 2012 Ohio IGCC Plant [Member] Ohio Power Co [Member]	Sep. 30, 2012 Turk Plant [Member]	Sep. 30, 2012 Turk Plant [Member] Electric Transmission [Member]	Sep. 30, 2012 Turk Plant [Member] Southwestern Electric Power Co [Member]	Sep. 30, 2012 Turk Plant [Member] Southwestern Electric Power Co [Member] Electric Transmission [Member]	Sep. 30, 2012 Texas Base Rate Case [Member]	Sep. 30, 2012 Texas Base Rate Case [Member] Southwestern Electric Power Co [Member]	Sep. 30, 2012 Louisiana 2010 Formula Rate Filing [Member] Southwestern Electric Power Co [Member]	Sep. 30, 2012 Virginia Fuel Filing [Member]	Sep. 30, 2012 Virginia Fuel Filing [Member] Appalachian Power Co [Member]	Sep. 30, 2012 APCo's Filing for IGCC Plant [Member] Applicable to West Virginia Jurisdiction [Member]	Sep. 30, 2012 APCo's Filing for IGCC Plant [Member] Applicable to West Virginia Jurisdiction [Member] Appalachian Power Co [Member]	Sep. 30, 2012 APCo's Filing for IGCC Plant [Member] Applicable to FERC Jurisdiction [Member]	Sep. 30, 2012 APCo's Filing for IGCC Plant [Member] Applicable to FERC Jurisdiction [Member] Appalachian Power Co [Member]	Sep. 30, 2012 APCo's Filing for IGCC Plant [Member] Applicable to Virginia Jurisdiction [Member]	Sep. 30, 2012 APCo's Filing for IGCC Plant [Member] Applicable to Virginia Jurisdiction [Member] Appalachian Power Co [Member]	Sep. 30, 2012 West Virginia Expanded Net Energy Charge [Member]	Sep. 30, 2012 West Virginia Expanded Net Energy Charge [Member] Appalachian Power Co [Member]	Sep. 30, 2012 West Virginia Expanded Net Energy Charge [Member] Appalachian Power Co [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Earning Return [Member]	Dec. 31, 2011 West Virginia Expanded Net Energy Charge [Member] Appalachian Power Co [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Earning Return [Member]	Sep. 30, 2012 Oklahoma Fuel and Purchased Power 2008 [Member]	Oct. 26, 2012 Oklahoma Fuel and Purchased Power 2008 [Member] Subsequent Event [Member]	Sep. 30, 2012 Oklahoma Fuel and Purchased Power 2008 [Member] Public Service Co Of Oklahoma [Member]	Oct. 26, 2012 Oklahoma Fuel and Purchased Power 2008 [Member] Public Service Co Of Oklahoma [Member] Subsequent Event [Member]	Sep. 30, 2012 Indiana Base Rate Case [Member]	Sep. 30, 2012 Indiana Base Rate Case [Member] Indiana Michigan Power Co [Member]	Sep. 30, 2012 Cook Plant Life Cycle Management Project [Member]	Sep. 30, 2012 Cook Plant Life Cycle Management Project [Member] Indiana Michigan Power Co [Member]	Sep. 30, 2012 Big Sandy Unit Two Flue Gas Desulfurization System [Member]	Sep. 30, 2012 Seams Elimination Cost Allocation [Member]	Sep. 30, 2012 Seams Elimination Cost Allocation [Member] Appalachian Power Co [Member]	Sep. 30, 2012 Seams Elimination Cost Allocation [Member] Ohio Power Co [Member]	Sep. 30, 2012 Seams Elimination Cost Allocation [Member] Indiana Michigan Power Co [Member]	Sep. 30, 2012 Environmental Compliance Costs [Member] Public Service Co Of Oklahoma [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Dec. 31, 2011 Environmental Compliance Costs [Member] Public Service Co Of Oklahoma [Member] Regulatory Assets Not Yet Being Recovered [Member] Regulatory Assets Currently Not Earning Return [Member]	Sep. 30, 2012 Flint Creek Plant Environmental Controls [Member]	Sep. 30, 2012 Flint Creek Plant Environmental Controls [Member] Southwestern Electric Power Co [Member]	Sep. 30, 2012 Rockport Plant Environmental Controls [Member]	Sep. 30, 2012 Rockport Plant Environmental Controls [Member] Minimum [Member]	Sep. 30, 2012 Rockport Plant Environmental Controls [Member] Maximum [Member]	Sep. 30, 2012 Rockport Plant Environmental Controls [Member] Indiana Michigan Power Co [Member]	Sep. 30, 2012 Rockport Plant Environmental Controls [Member] Indiana Michigan Power Co [Member] Minimum [Member]	Sep. 30, 2012 Rockport Plant Environmental Controls [Member] Indiana Michigan Power Co [Member] Maximum [Member]
Regulatory Assets Not Being Recovered [Abstract]
Regulatory Assets, Noncurrent	$ 5,306,000,000		$ 5,306,000,000		$ 6,026,000,000	$ 272,000,000	$ 155,000,000	$ 23,000,000	$ 24,000,000	$ 133,000,000	$ 10,000,000	$ 14,000,000	$ 14,000,000		$ 23,000,000	$ 18,000,000		$ 4,000,000	$ 38,000,000	$ 13,000,000	$ 13,000,000	$ 9,000,000	$ 0	$ 29,000,000	$ 14,000,000	$ 11,000,000	$ 11,000,000	$ 13,000,000	$ 13,000,000	$ 1,416,426,000	$ 1,481,193,000	$ 140,051,000	$ 87,378,000	$ 62,400,000	$ 0	$ 14,155,000	$ 14,155,000		$ 23,204,000	$ 17,950,000		$ 4,355,000	$ 38,192,000	$ 13,002,000	$ 12,811,000	$ 1,308,000	$ 1,010,000	$ 8,758,000	$ 0	$ 2,803,000	$ 1,925,000	$ 1,291,000	$ 1,335,000	$ 430,013,000		$ 430,013,000		$ 394,276,000	$ 8,073,000	$ 4,079,000	$ 2,099,000	$ 1,699,000	$ 2,301,000	$ 2,380,000	$ 3,673,000	$ 0	$ 1,455,396,000		$ 1,455,396,000		$ 1,370,504,000	$ 66,653,000	$ 20,947,000	$ 53,600,000	$ 8,375,000	$ 13,053,000	$ 12,572,000	$ 241,984,000	$ 266,545,000	$ 351,000	$ 0	$ 581,048,000	$ 602,979,000	$ 13,310,000	$ 12,483,000	$ 899,000	$ 0	$ 11,027,000	$ 10,803,000	$ 1,384,000	$ 1,680,000		$ 54,000,000	$ 536,000,000		$ 54,000,000	$ 536,000,000																														$ 307,000,000	$ 307,000,000	$ 8,775,000	$ 0														$ 351,000	$ 0
Recognized Gross Seams Elimination Cost Allocation Revenue [Abstract]
Recognized Gross Seams Elimination Cost Allocation Revenue																																																																																																																																												220,000,000	70,200,000	92,100,000	41,300,000
Originally Booked Reserve for Net Refund [Abstract]
Originally Booked Reserve for Net Refund																																																																																																																																												44,000,000	14,100,000	18,500,000	8,300,000
Reserve for Net Refund [Abstract]
Reserve for Net Refund																																																																																																																																												31,000,000	10,000,000	13,100,000	5,900,000
Acceptance of Compliance Filing [Abstract]
Potential Payment if Compliance Filing is Accepted																																																																																																																																												20,000,000	6,400,000	8,300,000	3,700,000
Rate Matters (Textuals) [Abstract]
Intervenors' Recommended Refund of POLR and Environmental Carrying Charge																																																																																												698,000,000			698,000,000
Intervenors' Recommended Additional Refund of Excessive Earnings																																																																																																		22,000,000	22,000,000	62,000,000	62,000,000
Commission Staff's Recommended Refund of Excessive Earnings																																																																																																				23,000,000	23,000,000
Regulatory Assets, Noncurrent	5,306,000,000		5,306,000,000		6,026,000,000	272,000,000	155,000,000	23,000,000	24,000,000	133,000,000	10,000,000	14,000,000	14,000,000		23,000,000	18,000,000		4,000,000	38,000,000	13,000,000	13,000,000	9,000,000	0	29,000,000	14,000,000	11,000,000	11,000,000	13,000,000	13,000,000	1,416,426,000	1,481,193,000	140,051,000	87,378,000	62,400,000	0	14,155,000	14,155,000		23,204,000	17,950,000		4,355,000	38,192,000	13,002,000	12,811,000	1,308,000	1,010,000	8,758,000	0	2,803,000	1,925,000	1,291,000	1,335,000	430,013,000		430,013,000		394,276,000	8,073,000	4,079,000	2,099,000	1,699,000	2,301,000	2,380,000	3,673,000	0	1,455,396,000		1,455,396,000		1,370,504,000	66,653,000	20,947,000	53,600,000	8,375,000	13,053,000	12,572,000	241,984,000	266,545,000	351,000	0	581,048,000	602,979,000	13,310,000	12,483,000	899,000	0	11,027,000	10,803,000	1,384,000	1,680,000		54,000,000	536,000,000		54,000,000	536,000,000																														307,000,000	307,000,000	8,775,000	0														351,000	0
Unrecognized Equity Carrying Costs																																																																																																																															5,000,000	5,000,000
Reversal of Liability Related to Obligation to Contribute to Partnership with Ohio and Ohio Growth Fund																																																																																												35,000,000			35,000,000
Reversal of Regulatory Asset																																																																																													8,000,000			8,000,000
Earnings Threshold for the Significantly Excessive Earnings Test																																																																																												12.00%			12.00%
Required Annual Contribution to the Ohio Growth Fund																																																																																												2,000,000			2,000,000
Percentage of Standard Service Offer Load Which Registrant Will Conduct an Energy Only Auction for Delivery through December 2014																																																																																												10.00%			10.00%
Percentage of Standard Service Offer Load Which Registrant Will Conduct an Energy Only Auction for Delivery Beginning June 2014 through June 2015																																																																																												60.00%			60.00%
Remaining Percentage of Standard Service Offer Load Which Registrant Will Conduct an Energy Only Auction for Delivery from January 2015 through June 2015																																																																																												40.00%			40.00%
PUCO-Determined Fixed Price Per MW Day for Customers Who Switch During ESP Period																																																																																												188.88			188.88
Reliability Pricing Model Rate per MW Day in Effect Through May 2013																																																																																												20			20
Total Amount Provided by the Retail Stability Rider																																																																																												508,000,000			508,000,000
Retail Stability Rider through May 2014 ($ Per MWh)																																																																																												3.50			3.50
Retail Stability Rider for the Period June 2014 through May 2015 ($ per MWh)																																																																																												4.00			4.00
Amount of Retail Stability Rider Applied to the Deferred Capacity Costs ($ Per MWh)																																																																																												1.00			1.00
Requested Base Rate Increase																																																																																																						94,000,000	94,000,000													83,000,000	83,000,000																		178,000,000	178,000,000
Requested Return on Equity																																																																																																						11.15%	11.15%													11.25%	11.25%																		11.15%	11.15%
Rider for Annual Credit to Residential Ratepayers																																																																																																						15,000,000	15,000,000
Distribution Investment Rider Revenue Cap for 2012																																																																																																						86,000,000	86,000,000
Distribution Investment Rider Revenue Cap for 2013																																																																																																						104,000,000	104,000,000
Distribution Investment Rider Revenue Cap for 2014																																																																																																						124,000,000	124,000,000
Distribution Investment Rider Revenue Cap for the Period January 2015 Through May 2015																																																																																																						52,000,000	52,000,000
Total Distribution Investment Rider Revenue Cap																																																																																																						366,000,000	366,000,000
2008 Coal Contract Settlement Proceeds to be Applied to Deferred Fuel Adjustment Clause as Orginially Ordered by the PUCO																																																																																																								65,000,000	65,000,000
Favorable Fuel Adjustment Based on Fuel Adjustment Clause Audit Rehearing																																																																																																								30,000,000	30,000,000
Remaining Retail Gain Not Already Flowed Through Fuel Adjustment Clause																																																																																																								35,000,000	35,000,000
Potential Refund of Carrying Costs																																																																																																										38,000,000	38,000,000
Potential Refund of Unrecognized Equity Carrying Costs																																																																																																										20,000,000	20,000,000
Deferred Fuel Adjustment Clause Related to Ormet Interim Arrangement as of September 2009																																																																																																												64,000,000	64,000,000
Unrecognized Equity Carrying Costs Related to Ormet Interim Arrangement as of September 2009																																																																																																												2,000,000	2,000,000
Collection of Authorized Pre-Construction Costs																																																																																																														24,000,000	24,000,000
Subsidiary's Ownership Percentage																																																																																																																73.00%		73.00%
Total Current Estimated Generation Costs																																																																																																																1,800,000,000		1,800,000,000
Total Current Estimated Transmission Costs																																																																																																																	122,000,000		122,000,000
Subsidiary's Estimated Share of the Generation Cost																																																																																																																1,300,000,000		1,300,000,000
Subsidiary's Estimated Share of the Transmission Costs																																																																																																																	122,000,000		122,000,000
Asset Impairments and Other Related Charges	13,000,000	90,000,000	13,000,000	90,000,000																																																		0	0	13,000,000	0										0	89,824,000	0	89,824,000																																										62,000,000		62,000,000
Construction Work in Progress	3,191,000,000		3,191,000,000		3,121,000,000																									283,775,000	565,841,000																							1,583,826,000		1,583,826,000		1,443,569,000									318,092,000		318,092,000		354,465,000							69,842,000	70,371,000			237,109,000	236,096,000																													1,700,000,000	127,000,000	1,700,000,000	127,000,000																						109,000,000	109,000,000	30,000,000							10,000,000	10,000,000	48,000,000			24,000,000
Subsidiary's Capitalized AFUDC and Interest Excluding Costs Attributable to its Joint Owners																																																																																																																296,000,000		296,000,000
Contractual Construction Obligations of Joint Owners and Subsidiary																																																																																																																42,000,000		42,000,000
Transmission Contractual Construction Obligations of Subsidiary																																																																																																																	3,000,000		3,000,000
Subsidiary's Share of the Contractual Construction Obligations																																																																																																																31,000,000		31,000,000
The PUCT Required Cap on the Plant, Excluding AFUDC and Related Transmission Costs																																																																																																																1,522,000,000		1,522,000,000
The PUCT Required Cap on CO2 Emission Costs (per ton)																																																																																																																28		28
Projected Capital Costs																																																																																																																																									1,200,000,000	1,200,000,000								408,000,000	408,000,000	1,400,000,000			1,400,000,000
Subsidary's Portion of Projected Capital Costs																																																																																																																																																		204,000,000	204,000,000
Requested Reduction in Rates																																																																																																																						3,000,000
Refund as Approved in the Settlement Agreement																																																																																																																						3,000,000
Requested Increase in Rates																																																																																																																							117,000,000	117,000,000
Approved Cost Recovery														30,000,000			26,000,000																					30,000,000			26,000,000
Write-off of Regulatory Asset, Pretax														31,000,000																								31,000,000
Commission Staff's Recommended Increase in the Revenue Requirement																	5,000,000																								5,000,000
Generation Rate Adjustment Clause Under-Recovered Balance as of April 2012																	3,000,000																								3,000,000
Amount of Deferred Preconstruction IGCC Costs for Future Recovery																																																																																																																									9,000,000	9,000,000	2,000,000	2,000,000	9,000,000	9,000,000
Increase in Construction Surcharge per the Settlement Agreement																																																																																																																															24,000,000	24,000,000
Reduction in Rates per the Settlement Agreement																																																																																																																															24,000,000	24,000,000
Requested Expanded Net Energy Charge Securitization																																																																																																																															422,000,000	422,000,000
Current Shareholder's Percentage of Off-System Sales Margins Sharing																																																																																																																																			25.00%		25.00%
The Intervenors' Proposed New Shareholder Percentage of Off-system Sales Margins Sharing																																																																																																																																			10.00%		10.00%
Approved Percentage of Off-system Sales Margins Sharing																																																																																																																																				25.00%		25.00%
Requested Net Base Rate Increase																																																																																																																																							149,000,000	149,000,000
Requested Reduction to Off-system Sales Sharing Rider																																																																																																																																							13,000,000	13,000,000
Requested Reduction to PJM Cost Rider																																																																																																																																							9,000,000	9,000,000
Requested Reduction to Clean Coal Technology Rider																																																																																																																																							7,000,000	7,000,000
Requested Increase in Depreciation Expense																																																																																																																																							25,000,000	25,000,000
Intervenors' Recommended Base Rate Increase																																																																																																																																							28,000,000	28,000,000
Intervenors' Recommended Return on Equity																																																																																																																																							9.20%	9.20%
Revised Requested Base Rate Increase																																																																																																																																							170,000,000	170,000,000
Indiana Michigan Power Company Industrial Group's Recommended Recovery in a Rider																																																																																																																																									229,000,000	229,000,000
The Indiana Office of Utility Consumer Counselor Recommended Maximum Recovery in a Rider																																																																																																																																									408,000,000	408,000,000
The Indiana Office of Utility Consumer Counselor Recommended Maximum Recovery in Future Base Rates																																																																																																																																									299,000,000	299,000,000
Attorney General Recommended Recovery																																																																																																																																									848,000,000	848,000,000
Intervenor Recommended Cost Cap																																																																																																																																																					1,100,000,000	1,400,000,000		1,100,000,000	1,400,000,000
Recognized Gross Seams Elimination Cost Allocation Revenue																																																																																																																																												220,000,000	70,200,000	92,100,000	41,300,000
Originally Booked Reserve for Net Refund																																																																																																																																												44,000,000	14,100,000	18,500,000	8,300,000
Potential Payment if Compliance Filing is Accepted																																																																																																																																												20,000,000	6,400,000	8,300,000	3,700,000
Amount of Estimated Interest Included in Potential Payment																																																																																																																																												5,000,000
Collection of Previously Deemed Uncollectible SECA Revenue in August 2012																																																																																																																																												8,000,000
Reserve for Net Refund																																																																																																																																												$ 31,000,000	$ 10,000,000	$ 13,100,000	$ 5,900,000