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Derivatives and Hedging (Tables)
9 Months Ended
Sep. 30, 2013
Notional Volume of Derivative Instruments
 Notional Volume of Derivative Instruments
           
    Volume  
    September 30, December 31, Unit of
   2013 2012 Measure
 Primary Risk Exposure (in millions) 
 Commodity:        
  Power   464   498 MWhs
  Coal   6   10 Tons
  Natural Gas   141   147 MMBtus
  Heating Oil and Gasoline   5   6 Gallons
  Interest Rate $ 201 $ 235 USD
           
 Interest Rate and Foreign Currency $ 820 $ 1,199 USD
Fair Value of Derivative Instruments
Fair Value of Derivative Instruments
September 30, 2013
  
             Gross Amounts Gross Net Amounts of
   Risk Management     of Risk Amounts Assets/Liabilities
   Contracts Hedging Contracts Management Offset in the Presented in the
       Interest Rate Assets/ Statement of  Statement of
       and Foreign  Liabilities Financial Financial
Balance Sheet Location Commodity (a) Commodity (a) Currency (a) Recognized Position (b) Position (c)
                    
   (in millions)
Current Risk Management Assets $ 441 $ 19 $ 4 $ 464 $ (293) $ 171
Long-term Risk Management Assets   433   6   1   440   (126)   314
Total Assets   874   25   5   904   (419)   485
                    
Current Risk Management Liabilities   389   23   1   413   (311)   102
Long-term Risk Management Liabilities    301   4   13   318   (136)   182
Total Liabilities   690   27   14   731   (447)   284
                    
Total MTM Derivative Contract Net                  
 Assets (Liabilities) $ 184 $ (2) $ (9) $ 173 $ 28 $ 201
                    
Fair Value of Derivative Instruments
December 31, 2012
  
            Gross Amounts Gross Net Amounts of
   Risk Management     of Risk Amounts Assets/Liabilities
   Contracts Hedging Contracts Management Offset in the Presented in the
       Interest Rate Assets/Statement of  Statement of
       and Foreign LiabilitiesFinancial Financial
Balance Sheet Location Commodity (a) Commodity (a) Currency (a) Recognized Position (b) Position (c)
                    
   (in millions)
Current Risk Management Assets $ 589 $ 32 $ 3 $ 624 $ (433) $ 191
Long-term Risk Management Assets   528   5   1   534   (166)   368
Total Assets   1,117   37   4   1,158   (599)   559
                    
Current Risk Management Liabilities   546   43   35   624   (469)   155
Long-term Risk Management Liabilities    383   6   6   395   (181)   214
Total Liabilities   929   49   41   1,019   (650)   369
                    
Total MTM Derivative Contract Net                  
 Assets (Liabilities) $ 188 $ (12) $ (37) $ 139 $ 51 $ 190

(a)       Derivative instruments within these categories are reported gross. These instruments are subject to master netting agreements and are presented on the condensed balance sheets on a net basis in accordance with the accounting guidance for "Derivatives and Hedging."

(b)       Amounts primarily include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for "Derivatives and Hedging." Amounts also include de-designated risk management contracts.

(c)       There are no derivative contracts subject to a master netting arrangement or similar agreement which are not offset in the statement of financial position.

Amount of Gain Loss Recognized on Risk Management Contracts
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Three and Nine Months Ended September 30, 2013 and 2012
              
   Three Months Ended September 30, Nine Months Ended September 30,
 Location of Gain (Loss) 2013 2012 2013 2012
   (in millions)
 Utility Operations Revenues $ 4 $ 5 $ 17 $ 19
 Other Revenues   9   20   39   28
 Regulatory Assets (a)   -   2   (3)   (35)
 Regulatory Liabilities (a)   (5)   (14)   (10)   12
 Total Gain (Loss) on Risk             
  Management Contracts $ 8 $ 13 $ 43 $ 24
              

(a)       Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current or noncurrent on the condensed balance sheets.

Impact of Cash Flow Hedges on the Condensed Balance Sheet
 Impact of Cash Flow Hedges on the Condensed Balance Sheet
 September 30, 2013
             
        Interest Rate   
        and Foreign    
     Commodity Currency Total
     (in millions)
 Hedging Assets (a) $ 9 $ - $ 9
 Hedging Liabilities (a)   11   2   13
 AOCI Gain (Loss) Net of Tax   (1)   (24)   (25)
 Portion Expected to be Reclassified to Net         
  Income During the Next Twelve Months   (2)   (4)   (6)
             
 Impact of Cash Flow Hedges on the Condensed Balance Sheet
 December 31, 2012
             
        Interest Rate   
        and Foreign    
     Commodity Currency Total
     (in millions)
 Hedging Assets (a) $ 24 $ - $ 24
 Hedging Liabilities (a)   36   37   73
 AOCI Gain (Loss) Net of Tax   (8)   (30)   (38)
 Portion Expected to be Reclassified to Net         
  Income During the Next Twelve Months   (8)   (4)   (12)

(a)       Hedging Assets and Hedging Liabilities are included in Risk Management Assets and Liabilities on the condensed balance sheets.

Collateral Required Under Various Triggering Events
    September 30, December 31,
    2013 2012
    (in millions)
 Liabilities for Derivative Contracts with Credit Downgrade Triggers $ 3 $ 7
 Amount of Collateral AEP Subsidiaries Would Have Been      
  Required to Post   39   32
 Amount Attributable to RTO and ISO Activities   38   31
Liabilities Subject to Cross Default Provisions
   September 30, December 31,
   2013 2012
   (in millions)
 Liabilities for Contracts with Cross Default Provisions Prior to Contractual      
  Netting Arrangements $ 341 $ 469
 Amount of Cash Collateral Posted   1   8
 Additional Settlement Liability if Cross Default Provision is Triggered   258   328
Appalachian Power Co [Member]
 
Notional Volume of Derivative Instruments
Notional Volume of Derivative Instruments
September 30, 2013
                    
Primary Risk Unit of               
Exposure Measure APCo I&M OPCo PSO SWEPCo
      (in thousands)
Commodity:                 
 Power MWhs   75,861   49,918   104,093   8   10
 Coal Tons   282   3,980   813   2,075   1,229
 Natural Gas MMBtus   4,121   2,711   5,654   -   -
 Heating Oil and                 
  Gasoline Gallons   981   484   1,155   491   603
 Interest Rate USD $ 16,501 $ 10,858 $ 22,642 $ - $ -
                    
Interest Rate and                 
 Foreign Currency USD $ - $ - $ - $ - $ -
                    
Notional Volume of Derivative Instruments
December 31, 2012
                    
Primary Risk Unit of               
Exposure Measure APCo I&M OPCo PSO SWEPCo
      (in thousands)
Commodity:                 
 Power MWhs   94,059   64,791   132,188   -   -
 Coal Tons   1,401   2,711   3,033   1,980   1,312
 Natural Gas MMBtus   10,077   6,922   14,163   -   -
 Heating Oil and                 
  Gasoline Gallons   1,050   532   1,260   616   585
 Interest Rate USD $ 24,146 $ 16,584 $ 33,934 $ - $ -
                    
Interest Rate and                 
 Foreign Currency USD $ - $ 200,000 $ - $ - $ -
Cash Collateral Netting
    September 30, 2013 December 31, 2012
    Cash Collateral Cash Collateral Cash Collateral Cash Collateral
    Received Paid Received Paid
    Netted Against Netted Against Netted Against Netted Against
    Risk Management Risk Management Risk Management Risk Management
 Company Assets Liabilities Assets Liabilities
    (in thousands)
 APCo $ 116 $ 5,608 $ 1,262 $ 11,029
 I&M   76   3,688   867   7,576
 OPCo   159   7,693   1,774   15,500
 PSO   -   7   -   -
 SWEPCo   -   8   -   -
Fair Value of Derivative Instruments
APCo                  
Fair Value of Derivative Instruments
September 30, 2013
                    
   Risk     Gross Amounts Gross Net Amounts of
   Management     of Risk Amounts Assets/Liabilities
   Contracts Hedging Contracts Management Offset in the Presented in the
        Interest Rate Assets/ Statement of Statement of
       and Foreign Liabilities Financial Financial
Balance Sheet Location Commodity (a) Commodity (a) Currency (a) Recognized Position (b) Position (c)
                    
   (in thousands)
Current Risk Management Assets $68,593 $233 $- $68,826 $(44,276) $24,550
Long-term Risk Management Assets  32,501  226  -  32,727  (11,888)  20,839
Total Assets  101,094  459  -  101,553  (56,164)  45,389
                    
Current Risk Management Liabilities  59,793  567  -  60,360  (48,719)  11,641
Long-term Risk Management Liabilities   25,003  15  -  25,018  (12,937)  12,081
Total Liabilities  84,796  582  -  85,378  (61,656)  23,722
                    
Total MTM Derivative Contract Net                  
 Assets (Liabilities) $16,298 $(123) $- $16,175 $5,492 $21,667
                    
APCo                  
Fair Value of Derivative Instruments
December 31, 2012
                    
   Risk     Gross Amounts Gross Net Amounts of
   Management     of Risk Amounts Assets/Liabilities
   Contracts Hedging Contracts Management Offset in the Presented in the
        Interest Rate Assets/ Statement of Statement of
       and Foreign Liabilities Financial Financial
Balance Sheet Location Commodity (a) Commodity (a) Currency (a) Recognized Position (b) Position (c)
                    
   (in thousands)
Current Risk Management Assets $127,645 $338 $- $127,983 $(97,023) $30,960
Long-term Risk Management Assets  60,498  215  -  60,713  (26,353)  34,360
Total Assets  188,143  553  -  188,696  (123,376)  65,320
                    
Current Risk Management Liabilities  119,430  1,182  -  120,612  (103,914)  16,698
Long-term Risk Management Liabilities   47,281  424  -  47,705  (29,229)  18,476
Total Liabilities  166,711  1,606  -  168,317  (133,143)  35,174
                    
Total MTM Derivative Contract Net                  
 Assets (Liabilities) $21,432 $(1,053) $- $20,379 $9,767 $30,146

(a)       Derivative instruments within these categories are reported gross. These instruments are subject to master netting agreements and are presented on the condensed balance sheets on a net basis in accordance with the accounting guidance for "Derivatives and Hedging."

(b)       Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for "Derivatives and Hedging."

(c)       There are no derivative contracts subject to a master netting arrangement or similar agreement which are not offset in the statement of financial position.

Amount of Gain Loss Recognized on Risk Management Contracts
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Three Months Ended September 30, 2013
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
     (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 746 $ 1,742 $ 66 $ 25 $ 51
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   -   (1,349)   -   960   421
 Regulatory Liabilities (a)   (950)   (2,347)   (1,264)   18   130
 Total Gain (Loss) on Risk Management               
  Contracts $ (204) $ (1,954) $ (1,198) $ 1,003 $ 602
                   
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Three Months Ended September 30, 2012
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
     (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 378 $ 3,814 $ 87 $ 71 $ 174
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   (138)   (1,213)   3,000   598   115
 Regulatory Liabilities (a)   (1,672)   (5,267)   (6,788)   2   11
 Total Gain (Loss) on Risk Management               
  Contracts $ (1,432) $ (2,666) $ (3,701) $ 671 $ 300

 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Nine Months Ended September 30, 2013
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
    (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 1,619 $ 9,586 $ 3,599 $ 241 $ 381
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   -   (1,648)   (5,158)   3,162   427
 Regulatory Liabilities (a)   (1,160)   (9,209)   1,557   18   157
 Total Gain (Loss) on Risk Management               
  Contracts $ 459 $ (1,271) $ (2) $ 3,421 $ 965
                  
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Nine Months Ended September 30, 2012
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
    (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ (548) $ 9,206 $ 11,118 $ 231 $ 426
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   (6,133)   (7,228)   (9,026)   (5,360)   (6,977)
 Regulatory Liabilities (a)   8,166   1,851   390   3   6
 Total Gain (Loss) on Risk Management               
  Contracts $ 1,485 $ 3,829 $ 2,482 $ (5,126) $ (6,545)
                  
 (a) Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current
  or noncurrent on the condensed balance sheets.
Impact of Cash Flow Hedges on the Condensed Balance Sheet
 Impact of Cash Flow Hedges on the Registrant Subsidiaries’
 Condensed Balance Sheets
 September 30, 2013
  
    Hedging Assets (a) Hedging Liabilities (a) AOCI Gain (Loss) Net of Tax
      Interest Rate   Interest Rate   Interest Rate
      and Foreign    and Foreign    and Foreign
 Company Commodity Currency Commodity Currency Commodity Currency
    (in thousands)
 APCo $ 307 $ - $ 430 $ - $ (34) $ 2,836
 I&M   199   -   278   -   (19)   (16,386)
 OPCo   418   -   585   -   (47)   7,076
 PSO   10   -   16   -   (3)   5,891
 SWEPCo   12   -   19   -   (3)   (13,871)

    Expected to be Reclassified to   
    Net Income During the Next   
    Twelve Months   
        Maximum Term for
      Interest Rate Exposure to
      and Foreign  Variability of Future
 Company Commodity Currency Cash Flows
    (in thousands) (in months)
 APCo $ (172) $ (930)   15
 I&M   (113)   (1,640)   15
 OPCo   (236)   1,359   15
 PSO   1   759   15
 SWEPCo   1   (2,267)   15

 Impact of Cash Flow Hedges on the Registrant Subsidiaries’
 Condensed Balance Sheets
 December 31, 2012
  
    Hedging Assets (a) Hedging Liabilities (a) AOCI Gain (Loss) Net of Tax
      Interest Rate   Interest Rate   Interest Rate
      and Foreign    and Foreign    and Foreign
 Company Commodity Currency Commodity Currency Commodity Currency
    (in thousands)
 APCo $ 302 $ - $ 1,355 $ - $ (644) $ 2,077
 I&M   200   -   931   19,524   (446)   (19,647)
 OPCo   416   -   1,903   -   (912)   8,095
 PSO   25   -   -   -   21   6,460
 SWEPCo   24   -   -   -   22   (15,571)

    Expected to be Reclassified to 
    Net Income During the Next 
    Twelve Months 
      Interest Rate 
      and Foreign  
 Company Commodity Currency 
    (in thousands) 
 APCo $ (507) $ (1,013) 
 I&M   (355)   (1,600) 
 OPCo   (720)   1,359 
 PSO   21   759 
 SWEPCo   22   (2,267) 

(a)       Hedging Assets and Hedging Liabilities are included in Risk Management Assets and Liabilities on the condensed balance sheets.

Collateral Required Under Various Triggering Events
    September 30, 2013
    Liabilities for Amount of Collateral the Amount
    Derivative Contracts Registrant Subsidiaries Attributable to
    with Credit Would Have Been RTO and ISO
 Company Downgrade Triggers Required to Post Activities
    (in thousands)
 APCo $ 850 $ 6,183 $ 5,812
 I&M   560   4,069   3,824
 OPCo   1,167   8,484   7,975
 PSO   -   255   200
 SWEPCo   -   315   247

    December 31, 2012
    Liabilities for Amount of Collateral the Amount
    Derivative Contracts Registrant Subsidiaries Attributable to
    with Credit  Would Have Been RTO and ISO
 Company Downgrade Triggers Required to Post Activities
    (in thousands)
 APCo $ 2,159 $ 3,699 $ 3,510
 I&M   1,483   2,540   2,411
 OPCo   3,034   5,198   4,933
 PSO   -   1,509   1,429
 SWEPCo   -   1,778   1,683
Liabilities Subject to Cross Default Provisions
    September 30, 2013
    Liabilities for   Additional
    Contracts with Cross   Settlement
    Default Provisions   Liability if Cross
    Prior to Contractual Amount of Cash Default Provision
 Company Netting Arrangements Collateral Posted is Triggered
    (in thousands)
 APCo $ 27,044 $ - $ 22,162
 I&M   17,796   -   14,583
 OPCo   37,110   -   30,410
 PSO   5   -   5
 SWEPCo   6   -   6
            
    December 31, 2012
    Liabilities for   Additional
    Contracts with Cross   Settlement
    Default Provisions   Liability if Cross
    Prior to Contractual Amount of Cash Default Provision
 Company Netting Arrangements Collateral Posted is Triggered
    (in thousands)
 APCo $ 49,465 $ 1,822 $ 30,160
 I&M   53,499   1,252   40,240
 OPCo   69,516   2,561   42,386
 PSO   -   -   -
 SWEPCo   -   -   -
Indiana Michigan Power Co [Member]
 
Notional Volume of Derivative Instruments
Notional Volume of Derivative Instruments
September 30, 2013
                    
Primary Risk Unit of               
Exposure Measure APCo I&M OPCo PSO SWEPCo
      (in thousands)
Commodity:                 
 Power MWhs   75,861   49,918   104,093   8   10
 Coal Tons   282   3,980   813   2,075   1,229
 Natural Gas MMBtus   4,121   2,711   5,654   -   -
 Heating Oil and                 
  Gasoline Gallons   981   484   1,155   491   603
 Interest Rate USD $ 16,501 $ 10,858 $ 22,642 $ - $ -
                    
Interest Rate and                 
 Foreign Currency USD $ - $ - $ - $ - $ -
                    
Notional Volume of Derivative Instruments
December 31, 2012
                    
Primary Risk Unit of               
Exposure Measure APCo I&M OPCo PSO SWEPCo
      (in thousands)
Commodity:                 
 Power MWhs   94,059   64,791   132,188   -   -
 Coal Tons   1,401   2,711   3,033   1,980   1,312
 Natural Gas MMBtus   10,077   6,922   14,163   -   -
 Heating Oil and                 
  Gasoline Gallons   1,050   532   1,260   616   585
 Interest Rate USD $ 24,146 $ 16,584 $ 33,934 $ - $ -
                    
Interest Rate and                 
 Foreign Currency USD $ - $ 200,000 $ - $ - $ -
Cash Collateral Netting
    September 30, 2013 December 31, 2012
    Cash Collateral Cash Collateral Cash Collateral Cash Collateral
    Received Paid Received Paid
    Netted Against Netted Against Netted Against Netted Against
    Risk Management Risk Management Risk Management Risk Management
 Company Assets Liabilities Assets Liabilities
    (in thousands)
 APCo $ 116 $ 5,608 $ 1,262 $ 11,029
 I&M   76   3,688   867   7,576
 OPCo   159   7,693   1,774   15,500
 PSO   -   7   -   -
 SWEPCo   -   8   -   -
Fair Value of Derivative Instruments
I&M                  
Fair Value of Derivative Instruments
September 30, 2013
                    
   Risk     Gross Amounts Gross Net Amounts of
   Management     of Risk Amounts Assets/Liabilities
   Contracts Hedging Contracts Management Offset in the Presented in the
        Interest Rate Assets/ Statement of Statement of
       and Foreign Liabilities Financial Financial
Balance Sheet Location Commodity (a) Commodity (a) Currency (a) Recognized Position (b) Position (c)
                    
   (in thousands)
Current Risk Management Assets $44,988 $149 $- $45,137 $(28,987) $16,150
Long-term Risk Management Assets  21,432  149  -  21,581  (7,848)  13,733
Total Assets  66,420  298  -  66,718  (36,835)  29,883
                    
Current Risk Management Liabilities  40,809  370  -  41,179  (31,911)  9,268
Long-term Risk Management Liabilities   16,836  7  -  16,843  (8,536)  8,307
Total Liabilities  57,645  377  -  58,022  (40,447)  17,575
                    
Total MTM Derivative Contract Net                  
 Assets (Liabilities) $8,775 $(79) $- $8,696 $3,612 $12,308
                    
I&M                  
Fair Value of Derivative Instruments
December 31, 2012
                   
   Risk     Gross Amounts Gross Net Amounts of
   Management     of Risk Amounts Assets/Liabilities
   Contracts Hedging Contracts Management Offset in the Presented in the
        Interest Rate Assets/ Statement of Statement of
       and Foreign Liabilities Financial Financial
Balance Sheet Location Commodity (a) Commodity (a) Currency (a) Recognized Position (b) Position (c)
                    
   (in thousands)
Current Risk Management Assets $93,268 $220 $- $93,488 $(66,514) $26,974
Long-term Risk Management Assets  41,553  148  -  41,701  (18,132)  23,569
Total Assets  134,821  368  -  135,189  (84,646)  50,543
                    
Current Risk Management Liabilities  82,433  807  19,524  102,764  (71,247)  31,517
Long-term Risk Management Liabilities   33,714  292  -  34,006  (20,108)  13,898
Total Liabilities  116,147  1,099  19,524  136,770  (91,355)  45,415
                    
Total MTM Derivative Contract Net                  
 Assets (Liabilities) $18,674 $(731) $(19,524) $(1,581) $6,709 $5,128

(a)       Derivative instruments within these categories are reported gross. These instruments are subject to master netting agreements and are presented on the condensed balance sheets on a net basis in accordance with the accounting guidance for "Derivatives and Hedging."

(b)       Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for "Derivatives and Hedging."

(c)       There are no derivative contracts subject to a master netting arrangement or similar agreement which are not offset in the statement of financial position.

Amount of Gain Loss Recognized on Risk Management Contracts
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Three Months Ended September 30, 2013
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
     (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 746 $ 1,742 $ 66 $ 25 $ 51
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   -   (1,349)   -   960   421
 Regulatory Liabilities (a)   (950)   (2,347)   (1,264)   18   130
 Total Gain (Loss) on Risk Management               
  Contracts $ (204) $ (1,954) $ (1,198) $ 1,003 $ 602
                   
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Three Months Ended September 30, 2012
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
     (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 378 $ 3,814 $ 87 $ 71 $ 174
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   (138)   (1,213)   3,000   598   115
 Regulatory Liabilities (a)   (1,672)   (5,267)   (6,788)   2   11
 Total Gain (Loss) on Risk Management               
  Contracts $ (1,432) $ (2,666) $ (3,701) $ 671 $ 300

 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Nine Months Ended September 30, 2013
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
    (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 1,619 $ 9,586 $ 3,599 $ 241 $ 381
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   -   (1,648)   (5,158)   3,162   427
 Regulatory Liabilities (a)   (1,160)   (9,209)   1,557   18   157
 Total Gain (Loss) on Risk Management               
  Contracts $ 459 $ (1,271) $ (2) $ 3,421 $ 965
                  
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Nine Months Ended September 30, 2012
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
    (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ (548) $ 9,206 $ 11,118 $ 231 $ 426
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   (6,133)   (7,228)   (9,026)   (5,360)   (6,977)
 Regulatory Liabilities (a)   8,166   1,851   390   3   6
 Total Gain (Loss) on Risk Management               
  Contracts $ 1,485 $ 3,829 $ 2,482 $ (5,126) $ (6,545)
                  
 (a) Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current
  or noncurrent on the condensed balance sheets.
Impact of Cash Flow Hedges on the Condensed Balance Sheet
 Impact of Cash Flow Hedges on the Registrant Subsidiaries’
 Condensed Balance Sheets
 September 30, 2013
  
    Hedging Assets (a) Hedging Liabilities (a) AOCI Gain (Loss) Net of Tax
      Interest Rate   Interest Rate   Interest Rate
      and Foreign    and Foreign    and Foreign
 Company Commodity Currency Commodity Currency Commodity Currency
    (in thousands)
 APCo $ 307 $ - $ 430 $ - $ (34) $ 2,836
 I&M   199   -   278   -   (19)   (16,386)
 OPCo   418   -   585   -   (47)   7,076
 PSO   10   -   16   -   (3)   5,891
 SWEPCo   12   -   19   -   (3)   (13,871)

    Expected to be Reclassified to   
    Net Income During the Next   
    Twelve Months   
        Maximum Term for
      Interest Rate Exposure to
      and Foreign  Variability of Future
 Company Commodity Currency Cash Flows
    (in thousands) (in months)
 APCo $ (172) $ (930)   15
 I&M   (113)   (1,640)   15
 OPCo   (236)   1,359   15
 PSO   1   759   15
 SWEPCo   1   (2,267)   15

 Impact of Cash Flow Hedges on the Registrant Subsidiaries’
 Condensed Balance Sheets
 December 31, 2012
  
    Hedging Assets (a) Hedging Liabilities (a) AOCI Gain (Loss) Net of Tax
      Interest Rate   Interest Rate   Interest Rate
      and Foreign    and Foreign    and Foreign
 Company Commodity Currency Commodity Currency Commodity Currency
    (in thousands)
 APCo $ 302 $ - $ 1,355 $ - $ (644) $ 2,077
 I&M   200   -   931   19,524   (446)   (19,647)
 OPCo   416   -   1,903   -   (912)   8,095
 PSO   25   -   -   -   21   6,460
 SWEPCo   24   -   -   -   22   (15,571)

    Expected to be Reclassified to 
    Net Income During the Next 
    Twelve Months 
      Interest Rate 
      and Foreign  
 Company Commodity Currency 
    (in thousands) 
 APCo $ (507) $ (1,013) 
 I&M   (355)   (1,600) 
 OPCo   (720)   1,359 
 PSO   21   759 
 SWEPCo   22   (2,267) 

(a)       Hedging Assets and Hedging Liabilities are included in Risk Management Assets and Liabilities on the condensed balance sheets.

Collateral Required Under Various Triggering Events
    September 30, 2013
    Liabilities for Amount of Collateral the Amount
    Derivative Contracts Registrant Subsidiaries Attributable to
    with Credit Would Have Been RTO and ISO
 Company Downgrade Triggers Required to Post Activities
    (in thousands)
 APCo $ 850 $ 6,183 $ 5,812
 I&M   560   4,069   3,824
 OPCo   1,167   8,484   7,975
 PSO   -   255   200
 SWEPCo   -   315   247

    December 31, 2012
    Liabilities for Amount of Collateral the Amount
    Derivative Contracts Registrant Subsidiaries Attributable to
    with Credit  Would Have Been RTO and ISO
 Company Downgrade Triggers Required to Post Activities
    (in thousands)
 APCo $ 2,159 $ 3,699 $ 3,510
 I&M   1,483   2,540   2,411
 OPCo   3,034   5,198   4,933
 PSO   -   1,509   1,429
 SWEPCo   -   1,778   1,683
Liabilities Subject to Cross Default Provisions
    September 30, 2013
    Liabilities for   Additional
    Contracts with Cross   Settlement
    Default Provisions   Liability if Cross
    Prior to Contractual Amount of Cash Default Provision
 Company Netting Arrangements Collateral Posted is Triggered
    (in thousands)
 APCo $ 27,044 $ - $ 22,162
 I&M   17,796   -   14,583
 OPCo   37,110   -   30,410
 PSO   5   -   5
 SWEPCo   6   -   6
            
    December 31, 2012
    Liabilities for   Additional
    Contracts with Cross   Settlement
    Default Provisions   Liability if Cross
    Prior to Contractual Amount of Cash Default Provision
 Company Netting Arrangements Collateral Posted is Triggered
    (in thousands)
 APCo $ 49,465 $ 1,822 $ 30,160
 I&M   53,499   1,252   40,240
 OPCo   69,516   2,561   42,386
 PSO   -   -   -
 SWEPCo   -   -   -
Ohio Power Co [Member]
 
Notional Volume of Derivative Instruments
Notional Volume of Derivative Instruments
September 30, 2013
                    
Primary Risk Unit of               
Exposure Measure APCo I&M OPCo PSO SWEPCo
      (in thousands)
Commodity:                 
 Power MWhs   75,861   49,918   104,093   8   10
 Coal Tons   282   3,980   813   2,075   1,229
 Natural Gas MMBtus   4,121   2,711   5,654   -   -
 Heating Oil and                 
  Gasoline Gallons   981   484   1,155   491   603
 Interest Rate USD $ 16,501 $ 10,858 $ 22,642 $ - $ -
                    
Interest Rate and                 
 Foreign Currency USD $ - $ - $ - $ - $ -
                    
Notional Volume of Derivative Instruments
December 31, 2012
                    
Primary Risk Unit of               
Exposure Measure APCo I&M OPCo PSO SWEPCo
      (in thousands)
Commodity:                 
 Power MWhs   94,059   64,791   132,188   -   -
 Coal Tons   1,401   2,711   3,033   1,980   1,312
 Natural Gas MMBtus   10,077   6,922   14,163   -   -
 Heating Oil and                 
  Gasoline Gallons   1,050   532   1,260   616   585
 Interest Rate USD $ 24,146 $ 16,584 $ 33,934 $ - $ -
                    
Interest Rate and                 
 Foreign Currency USD $ - $ 200,000 $ - $ - $ -
Cash Collateral Netting
    September 30, 2013 December 31, 2012
    Cash Collateral Cash Collateral Cash Collateral Cash Collateral
    Received Paid Received Paid
    Netted Against Netted Against Netted Against Netted Against
    Risk Management Risk Management Risk Management Risk Management
 Company Assets Liabilities Assets Liabilities
    (in thousands)
 APCo $ 116 $ 5,608 $ 1,262 $ 11,029
 I&M   76   3,688   867   7,576
 OPCo   159   7,693   1,774   15,500
 PSO   -   7   -   -
 SWEPCo   -   8   -   -
Fair Value of Derivative Instruments
OPCo                  
Fair Value of Derivative Instruments
September 30, 2013
                    
   Risk     Gross Amounts Gross Net Amounts of
   Management     of Risk Amounts Assets/Liabilities
   Contracts Hedging Contracts Management Offset in the Presented in the
        Interest Rate Assets/ Statement of Statement of
       and Foreign Liabilities Financial Financial
Balance Sheet Location Commodity (a) Commodity (a) Currency (a) Recognized Position (b) Position (c)
                    
   (in thousands)
Current Risk Management Assets $96,628 $315 $- $96,943 $(62,765) $34,178
Long-term Risk Management Assets  44,597  310  -  44,907  (16,313)  28,594
Total Assets  141,225  625  -  141,850  (79,078)  62,772
                    
Current Risk Management Liabilities  84,519  774  -  85,293  (68,862)  16,431
Long-term Risk Management Liabilities   34,309  18  -  34,327  (17,750)  16,577
Total Liabilities  118,828  792  -  119,620  (86,612)  33,008
                    
Total MTM Derivative Contract Net                  
 Assets (Liabilities) $22,397 $(167) $- $22,230 $7,534 $29,764
                    
OPCo                  
Fair Value of Derivative Instruments
December 31, 2012
                    
   Risk     Gross Amounts Gross Net Amounts of
   Management     of Risk Amounts Assets/Liabilities
   Contracts Hedging Contracts Management Offset in the Presented in the
        Interest Rate Assets/ Statement of Statement of
       and Foreign Liabilities Financial Financial
Balance Sheet Location Commodity (a) Commodity (a) Currency (a) Recognized Position (b) Position (c)
                    
   (in thousands)
Current Risk Management Assets $183,064 $464 $- $183,528 $(139,215) $44,313
Long-term Risk Management Assets  85,023  303  -  85,326  (37,038)  48,288
Total Assets  268,087  767  -  268,854  (176,253)  92,601
                    
Current Risk Management Liabilities  171,397  1,658  -  173,055  (148,900)  24,155
Long-term Risk Management Liabilities   66,448  596  -  67,044  (41,079)  25,965
Total Liabilities  237,845  2,254  -  240,099  (189,979)  50,120
                    
Total MTM Derivative Contract Net                  
 Assets (Liabilities) $30,242 $(1,487) $- $28,755 $13,726 $42,481

(a)       Derivative instruments within these categories are reported gross. These instruments are subject to master netting agreements and are presented on the condensed balance sheets on a net basis in accordance with the accounting guidance for "Derivatives and Hedging."

(b)       Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for "Derivatives and Hedging."

(c)       There are no derivative contracts subject to a master netting arrangement or similar agreement which are not offset in the statement of financial position.

Amount of Gain Loss Recognized on Risk Management Contracts
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Three Months Ended September 30, 2013
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
     (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 746 $ 1,742 $ 66 $ 25 $ 51
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   -   (1,349)   -   960   421
 Regulatory Liabilities (a)   (950)   (2,347)   (1,264)   18   130
 Total Gain (Loss) on Risk Management               
  Contracts $ (204) $ (1,954) $ (1,198) $ 1,003 $ 602
                   
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Three Months Ended September 30, 2012
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
     (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 378 $ 3,814 $ 87 $ 71 $ 174
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   (138)   (1,213)   3,000   598   115
 Regulatory Liabilities (a)   (1,672)   (5,267)   (6,788)   2   11
 Total Gain (Loss) on Risk Management               
  Contracts $ (1,432) $ (2,666) $ (3,701) $ 671 $ 300

 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Nine Months Ended September 30, 2013
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
    (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 1,619 $ 9,586 $ 3,599 $ 241 $ 381
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   -   (1,648)   (5,158)   3,162   427
 Regulatory Liabilities (a)   (1,160)   (9,209)   1,557   18   157
 Total Gain (Loss) on Risk Management               
  Contracts $ 459 $ (1,271) $ (2) $ 3,421 $ 965
                  
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Nine Months Ended September 30, 2012
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
    (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ (548) $ 9,206 $ 11,118 $ 231 $ 426
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   (6,133)   (7,228)   (9,026)   (5,360)   (6,977)
 Regulatory Liabilities (a)   8,166   1,851   390   3   6
 Total Gain (Loss) on Risk Management               
  Contracts $ 1,485 $ 3,829 $ 2,482 $ (5,126) $ (6,545)
                  
 (a) Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current
  or noncurrent on the condensed balance sheets.
Impact of Cash Flow Hedges on the Condensed Balance Sheet
 Impact of Cash Flow Hedges on the Registrant Subsidiaries’
 Condensed Balance Sheets
 September 30, 2013
  
    Hedging Assets (a) Hedging Liabilities (a) AOCI Gain (Loss) Net of Tax
      Interest Rate   Interest Rate   Interest Rate
      and Foreign    and Foreign    and Foreign
 Company Commodity Currency Commodity Currency Commodity Currency
    (in thousands)
 APCo $ 307 $ - $ 430 $ - $ (34) $ 2,836
 I&M   199   -   278   -   (19)   (16,386)
 OPCo   418   -   585   -   (47)   7,076
 PSO   10   -   16   -   (3)   5,891
 SWEPCo   12   -   19   -   (3)   (13,871)

    Expected to be Reclassified to   
    Net Income During the Next   
    Twelve Months   
        Maximum Term for
      Interest Rate Exposure to
      and Foreign  Variability of Future
 Company Commodity Currency Cash Flows
    (in thousands) (in months)
 APCo $ (172) $ (930)   15
 I&M   (113)   (1,640)   15
 OPCo   (236)   1,359   15
 PSO   1   759   15
 SWEPCo   1   (2,267)   15

 Impact of Cash Flow Hedges on the Registrant Subsidiaries’
 Condensed Balance Sheets
 December 31, 2012
  
    Hedging Assets (a) Hedging Liabilities (a) AOCI Gain (Loss) Net of Tax
      Interest Rate   Interest Rate   Interest Rate
      and Foreign    and Foreign    and Foreign
 Company Commodity Currency Commodity Currency Commodity Currency
    (in thousands)
 APCo $ 302 $ - $ 1,355 $ - $ (644) $ 2,077
 I&M   200   -   931   19,524   (446)   (19,647)
 OPCo   416   -   1,903   -   (912)   8,095
 PSO   25   -   -   -   21   6,460
 SWEPCo   24   -   -   -   22   (15,571)

    Expected to be Reclassified to 
    Net Income During the Next 
    Twelve Months 
      Interest Rate 
      and Foreign  
 Company Commodity Currency 
    (in thousands) 
 APCo $ (507) $ (1,013) 
 I&M   (355)   (1,600) 
 OPCo   (720)   1,359 
 PSO   21   759 
 SWEPCo   22   (2,267) 

(a)       Hedging Assets and Hedging Liabilities are included in Risk Management Assets and Liabilities on the condensed balance sheets.

Collateral Required Under Various Triggering Events
    September 30, 2013
    Liabilities for Amount of Collateral the Amount
    Derivative Contracts Registrant Subsidiaries Attributable to
    with Credit Would Have Been RTO and ISO
 Company Downgrade Triggers Required to Post Activities
    (in thousands)
 APCo $ 850 $ 6,183 $ 5,812
 I&M   560   4,069   3,824
 OPCo   1,167   8,484   7,975
 PSO   -   255   200
 SWEPCo   -   315   247

    December 31, 2012
    Liabilities for Amount of Collateral the Amount
    Derivative Contracts Registrant Subsidiaries Attributable to
    with Credit  Would Have Been RTO and ISO
 Company Downgrade Triggers Required to Post Activities
    (in thousands)
 APCo $ 2,159 $ 3,699 $ 3,510
 I&M   1,483   2,540   2,411
 OPCo   3,034   5,198   4,933
 PSO   -   1,509   1,429
 SWEPCo   -   1,778   1,683
Liabilities Subject to Cross Default Provisions
    September 30, 2013
    Liabilities for   Additional
    Contracts with Cross   Settlement
    Default Provisions   Liability if Cross
    Prior to Contractual Amount of Cash Default Provision
 Company Netting Arrangements Collateral Posted is Triggered
    (in thousands)
 APCo $ 27,044 $ - $ 22,162
 I&M   17,796   -   14,583
 OPCo   37,110   -   30,410
 PSO   5   -   5
 SWEPCo   6   -   6
            
    December 31, 2012
    Liabilities for   Additional
    Contracts with Cross   Settlement
    Default Provisions   Liability if Cross
    Prior to Contractual Amount of Cash Default Provision
 Company Netting Arrangements Collateral Posted is Triggered
    (in thousands)
 APCo $ 49,465 $ 1,822 $ 30,160
 I&M   53,499   1,252   40,240
 OPCo   69,516   2,561   42,386
 PSO   -   -   -
 SWEPCo   -   -   -
Public Service Co Of Oklahoma [Member]
 
Notional Volume of Derivative Instruments
Notional Volume of Derivative Instruments
September 30, 2013
                    
Primary Risk Unit of               
Exposure Measure APCo I&M OPCo PSO SWEPCo
      (in thousands)
Commodity:                 
 Power MWhs   75,861   49,918   104,093   8   10
 Coal Tons   282   3,980   813   2,075   1,229
 Natural Gas MMBtus   4,121   2,711   5,654   -   -
 Heating Oil and                 
  Gasoline Gallons   981   484   1,155   491   603
 Interest Rate USD $ 16,501 $ 10,858 $ 22,642 $ - $ -
                    
Interest Rate and                 
 Foreign Currency USD $ - $ - $ - $ - $ -
                    
Notional Volume of Derivative Instruments
December 31, 2012
                    
Primary Risk Unit of               
Exposure Measure APCo I&M OPCo PSO SWEPCo
      (in thousands)
Commodity:                 
 Power MWhs   94,059   64,791   132,188   -   -
 Coal Tons   1,401   2,711   3,033   1,980   1,312
 Natural Gas MMBtus   10,077   6,922   14,163   -   -
 Heating Oil and                 
  Gasoline Gallons   1,050   532   1,260   616   585
 Interest Rate USD $ 24,146 $ 16,584 $ 33,934 $ - $ -
                    
Interest Rate and                 
 Foreign Currency USD $ - $ 200,000 $ - $ - $ -
Cash Collateral Netting
    September 30, 2013 December 31, 2012
    Cash Collateral Cash Collateral Cash Collateral Cash Collateral
    Received Paid Received Paid
    Netted Against Netted Against Netted Against Netted Against
    Risk Management Risk Management Risk Management Risk Management
 Company Assets Liabilities Assets Liabilities
    (in thousands)
 APCo $ 116 $ 5,608 $ 1,262 $ 11,029
 I&M   76   3,688   867   7,576
 OPCo   159   7,693   1,774   15,500
 PSO   -   7   -   -
 SWEPCo   -   8   -   -
Fair Value of Derivative Instruments
PSO                  
Fair Value of Derivative Instruments
September 30, 2013
                    
   Risk     Gross Amounts Gross Net Amounts of
   Management     of Risk Amounts Assets/Liabilities
   Contracts Hedging Contracts Management Offset in the Presented in the
        Interest Rate Assets/ Statement of Statement of
       and Foreign Liabilities Financial Financial
Balance Sheet Location Commodity (a) Commodity (a) Currency (a) Recognized Position (b) Position (c)
                    
   (in thousands)
Current Risk Management Assets $1,394 $13 $- $1,407 $(555) $852
Long-term Risk Management Assets  149  -  -  149  -  149
Total Assets  1,543  13  -  1,556  (555)  1,001
                    
Current Risk Management Liabilities  1,931  12  -  1,943  (555)  1,388
Long-term Risk Management Liabilities  -  7  -  7  (7)  -
Total Liabilities  1,931  19  -  1,950  (562)  1,388
                    
Total MTM Derivative Contract Net                  
 Assets (Liabilities) $(388) $(6) $- $(394) $7 $(387)
                    
PSO                  
Fair Value of Derivative Instruments
December 31, 2012
                    
   Risk     Gross Amounts Gross Net Amounts of
   Management     of Risk Amounts Assets/Liabilities
   Contracts Hedging Contracts Management Offset in the Presented in the
        Interest Rate Assets/ Statement of Statement of
       and Foreign Liabilities Financial Financial
Balance Sheet Location Commodity (a) Commodity (a) Currency (a) Recognized Position (b) Position (c)
                    
   (in thousands)
Current Risk Management Assets $1,657 $42 $- $1,699 $(1,190) $509
Long-term Risk Management Assets  -  -  -  -  31  31
Total Assets  1,657  42  -  1,699  (1,159)  540
                    
Current Risk Management Liabilities  7,021  17  -  7,038  (1,190)  5,848
Long-term Risk Management Liabilities  -  -  -  -  31  31
Total Liabilities  7,021  17  -  7,038  (1,159)  5,879
                    
Total MTM Derivative Contract Net                  
 Assets (Liabilities) $(5,364) $25 $- $(5,339) $- $(5,339)

(a)       Derivative instruments within these categories are reported gross. These instruments are subject to master netting agreements and are presented on the condensed balance sheets on a net basis in accordance with the accounting guidance for "Derivatives and Hedging."

(b)       Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for "Derivatives and Hedging."

(c)       There are no derivative contracts subject to a master netting arrangement or similar agreement which are not offset in the statement of financial position.

Amount of Gain Loss Recognized on Risk Management Contracts
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Three Months Ended September 30, 2013
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
     (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 746 $ 1,742 $ 66 $ 25 $ 51
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   -   (1,349)   -   960   421
 Regulatory Liabilities (a)   (950)   (2,347)   (1,264)   18   130
 Total Gain (Loss) on Risk Management               
  Contracts $ (204) $ (1,954) $ (1,198) $ 1,003 $ 602
                   
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Three Months Ended September 30, 2012
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
     (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 378 $ 3,814 $ 87 $ 71 $ 174
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   (138)   (1,213)   3,000   598   115
 Regulatory Liabilities (a)   (1,672)   (5,267)   (6,788)   2   11
 Total Gain (Loss) on Risk Management               
  Contracts $ (1,432) $ (2,666) $ (3,701) $ 671 $ 300

 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Nine Months Ended September 30, 2013
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
    (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 1,619 $ 9,586 $ 3,599 $ 241 $ 381
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   -   (1,648)   (5,158)   3,162   427
 Regulatory Liabilities (a)   (1,160)   (9,209)   1,557   18   157
 Total Gain (Loss) on Risk Management               
  Contracts $ 459 $ (1,271) $ (2) $ 3,421 $ 965
                  
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Nine Months Ended September 30, 2012
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
    (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ (548) $ 9,206 $ 11,118 $ 231 $ 426
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   (6,133)   (7,228)   (9,026)   (5,360)   (6,977)
 Regulatory Liabilities (a)   8,166   1,851   390   3   6
 Total Gain (Loss) on Risk Management               
  Contracts $ 1,485 $ 3,829 $ 2,482 $ (5,126) $ (6,545)
                  
 (a) Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current
  or noncurrent on the condensed balance sheets.
Impact of Cash Flow Hedges on the Condensed Balance Sheet
 Impact of Cash Flow Hedges on the Registrant Subsidiaries’
 Condensed Balance Sheets
 September 30, 2013
  
    Hedging Assets (a) Hedging Liabilities (a) AOCI Gain (Loss) Net of Tax
      Interest Rate   Interest Rate   Interest Rate
      and Foreign    and Foreign    and Foreign
 Company Commodity Currency Commodity Currency Commodity Currency
    (in thousands)
 APCo $ 307 $ - $ 430 $ - $ (34) $ 2,836
 I&M   199   -   278   -   (19)   (16,386)
 OPCo   418   -   585   -   (47)   7,076
 PSO   10   -   16   -   (3)   5,891
 SWEPCo   12   -   19   -   (3)   (13,871)

    Expected to be Reclassified to   
    Net Income During the Next   
    Twelve Months   
        Maximum Term for
      Interest Rate Exposure to
      and Foreign  Variability of Future
 Company Commodity Currency Cash Flows
    (in thousands) (in months)
 APCo $ (172) $ (930)   15
 I&M   (113)   (1,640)   15
 OPCo   (236)   1,359   15
 PSO   1   759   15
 SWEPCo   1   (2,267)   15

 Impact of Cash Flow Hedges on the Registrant Subsidiaries’
 Condensed Balance Sheets
 December 31, 2012
  
    Hedging Assets (a) Hedging Liabilities (a) AOCI Gain (Loss) Net of Tax
      Interest Rate   Interest Rate   Interest Rate
      and Foreign    and Foreign    and Foreign
 Company Commodity Currency Commodity Currency Commodity Currency
    (in thousands)
 APCo $ 302 $ - $ 1,355 $ - $ (644) $ 2,077
 I&M   200   -   931   19,524   (446)   (19,647)
 OPCo   416   -   1,903   -   (912)   8,095
 PSO   25   -   -   -   21   6,460
 SWEPCo   24   -   -   -   22   (15,571)

    Expected to be Reclassified to 
    Net Income During the Next 
    Twelve Months 
      Interest Rate 
      and Foreign  
 Company Commodity Currency 
    (in thousands) 
 APCo $ (507) $ (1,013) 
 I&M   (355)   (1,600) 
 OPCo   (720)   1,359 
 PSO   21   759 
 SWEPCo   22   (2,267) 

(a)       Hedging Assets and Hedging Liabilities are included in Risk Management Assets and Liabilities on the condensed balance sheets.

Collateral Required Under Various Triggering Events
    September 30, 2013
    Liabilities for Amount of Collateral the Amount
    Derivative Contracts Registrant Subsidiaries Attributable to
    with Credit Would Have Been RTO and ISO
 Company Downgrade Triggers Required to Post Activities
    (in thousands)
 APCo $ 850 $ 6,183 $ 5,812
 I&M   560   4,069   3,824
 OPCo   1,167   8,484   7,975
 PSO   -   255   200
 SWEPCo   -   315   247

    December 31, 2012
    Liabilities for Amount of Collateral the Amount
    Derivative Contracts Registrant Subsidiaries Attributable to
    with Credit  Would Have Been RTO and ISO
 Company Downgrade Triggers Required to Post Activities
    (in thousands)
 APCo $ 2,159 $ 3,699 $ 3,510
 I&M   1,483   2,540   2,411
 OPCo   3,034   5,198   4,933
 PSO   -   1,509   1,429
 SWEPCo   -   1,778   1,683
Liabilities Subject to Cross Default Provisions
    September 30, 2013
    Liabilities for   Additional
    Contracts with Cross   Settlement
    Default Provisions   Liability if Cross
    Prior to Contractual Amount of Cash Default Provision
 Company Netting Arrangements Collateral Posted is Triggered
    (in thousands)
 APCo $ 27,044 $ - $ 22,162
 I&M   17,796   -   14,583
 OPCo   37,110   -   30,410
 PSO   5   -   5
 SWEPCo   6   -   6
            
    December 31, 2012
    Liabilities for   Additional
    Contracts with Cross   Settlement
    Default Provisions   Liability if Cross
    Prior to Contractual Amount of Cash Default Provision
 Company Netting Arrangements Collateral Posted is Triggered
    (in thousands)
 APCo $ 49,465 $ 1,822 $ 30,160
 I&M   53,499   1,252   40,240
 OPCo   69,516   2,561   42,386
 PSO   -   -   -
 SWEPCo   -   -   -
Southwestern Electric Power Co [Member]
 
Notional Volume of Derivative Instruments
Notional Volume of Derivative Instruments
September 30, 2013
                    
Primary Risk Unit of               
Exposure Measure APCo I&M OPCo PSO SWEPCo
      (in thousands)
Commodity:                 
 Power MWhs   75,861   49,918   104,093   8   10
 Coal Tons   282   3,980   813   2,075   1,229
 Natural Gas MMBtus   4,121   2,711   5,654   -   -
 Heating Oil and                 
  Gasoline Gallons   981   484   1,155   491   603
 Interest Rate USD $ 16,501 $ 10,858 $ 22,642 $ - $ -
                    
Interest Rate and                 
 Foreign Currency USD $ - $ - $ - $ - $ -
                    
Notional Volume of Derivative Instruments
December 31, 2012
                    
Primary Risk Unit of               
Exposure Measure APCo I&M OPCo PSO SWEPCo
      (in thousands)
Commodity:                 
 Power MWhs   94,059   64,791   132,188   -   -
 Coal Tons   1,401   2,711   3,033   1,980   1,312
 Natural Gas MMBtus   10,077   6,922   14,163   -   -
 Heating Oil and                 
  Gasoline Gallons   1,050   532   1,260   616   585
 Interest Rate USD $ 24,146 $ 16,584 $ 33,934 $ - $ -
                    
Interest Rate and                 
 Foreign Currency USD $ - $ 200,000 $ - $ - $ -
Cash Collateral Netting
    September 30, 2013 December 31, 2012
    Cash Collateral Cash Collateral Cash Collateral Cash Collateral
    Received Paid Received Paid
    Netted Against Netted Against Netted Against Netted Against
    Risk Management Risk Management Risk Management Risk Management
 Company Assets Liabilities Assets Liabilities
    (in thousands)
 APCo $ 116 $ 5,608 $ 1,262 $ 11,029
 I&M   76   3,688   867   7,576
 OPCo   159   7,693   1,774   15,500
 PSO   -   7   -   -
 SWEPCo   -   8   -   -
Fair Value of Derivative Instruments
SWEPCo                  
Fair Value of Derivative Instruments
September 30, 2013
                    
  Risk     Gross Amounts Gross Net Amounts of
  Management     of Risk Amounts Assets/Liabilities
  Contracts Hedging Contracts Management Offset in the Presented in the
       Interest Rate Assets/ Statement of Statement of
      and Foreign Liabilities Financial Financial
Balance Sheet Location Commodity (a) Commodity (a) Currency (a) Recognized Position (b) Position (c)
                    
  (in thousands)
Current Risk Management Assets $1,444 $15 $- $1,459 $(1,057) $402
Long-term Risk Management Assets  21  -  -  21  -  21
Total Assets  1,465  15  -  1,480  (1,057)  423
                   
Current Risk Management Liabilities  1,339  14  -  1,353  (1,057)  296
Long-term Risk Management Liabilities  -  8  -  8  (8)  -
Total Liabilities  1,339  22  -  1,361  (1,065)  296
                   
Total MTM Derivative Contract Net                  
 Assets (Liabilities) $126 $(7) $- $119 $8 $127
                   
SWEPCo                  
Fair Value of Derivative Instruments
December 31, 2012
                    
  Risk     Gross Amounts Gross Net Amounts of
  Management     of Risk Amounts Assets/Liabilities
  Contracts Hedging Contracts Management Offset in the Presented in the
       Interest Rate Assets/ Statement of Statement of
      and Foreign Liabilities Financial Financial
Balance Sheet Location Commodity (a) Commodity (a) Currency (a) Recognized Position (b) Position (c)
                    
  (in thousands)
Current Risk Management Assets $2,804 $41 $- $2,845 $(2,150) $695
Long-term Risk Management Assets  -  -  -  -  -  -
Total Assets  2,804  41  -  2,845  (2,150)  695
                   
Current Risk Management Liabilities  3,261  17  -  3,278  (2,150)  1,128
Long-term Risk Management Liabilities  -  -  -  -  -  -
Total Liabilities  3,261  17  -  3,278  (2,150)  1,128
                   
Total MTM Derivative Contract Net                  
 Assets (Liabilities) $(457) $24 $- $(433) $- $(433)

(a)       Derivative instruments within these categories are reported gross. These instruments are subject to master netting agreements and are presented on the condensed balance sheets on a net basis in accordance with the accounting guidance for "Derivatives and Hedging."

(b)       Amounts include counterparty netting of risk management and hedging contracts and associated cash collateral in accordance with the accounting guidance for "Derivatives and Hedging."

(c)       There are no derivative contracts subject to a master netting arrangement or similar agreement which are not offset in the statement of financial position.

Amount of Gain Loss Recognized on Risk Management Contracts
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Three Months Ended September 30, 2013
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
     (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 746 $ 1,742 $ 66 $ 25 $ 51
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   -   (1,349)   -   960   421
 Regulatory Liabilities (a)   (950)   (2,347)   (1,264)   18   130
 Total Gain (Loss) on Risk Management               
  Contracts $ (204) $ (1,954) $ (1,198) $ 1,003 $ 602
                   
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Three Months Ended September 30, 2012
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
     (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 378 $ 3,814 $ 87 $ 71 $ 174
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   (138)   (1,213)   3,000   598   115
 Regulatory Liabilities (a)   (1,672)   (5,267)   (6,788)   2   11
 Total Gain (Loss) on Risk Management               
  Contracts $ (1,432) $ (2,666) $ (3,701) $ 671 $ 300

 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Nine Months Ended September 30, 2013
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
    (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ 1,619 $ 9,586 $ 3,599 $ 241 $ 381
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   -   (1,648)   (5,158)   3,162   427
 Regulatory Liabilities (a)   (1,160)   (9,209)   1,557   18   157
 Total Gain (Loss) on Risk Management               
  Contracts $ 459 $ (1,271) $ (2) $ 3,421 $ 965
                  
 Amount of Gain (Loss) Recognized on
 Risk Management Contracts
 For the Nine Months Ended September 30, 2012
  
 Location of Gain (Loss) APCo I&M OPCo PSO SWEPCo
    (in thousands)
 Electric Generation, Transmission and               
  Distribution Revenues $ (548) $ 9,206 $ 11,118 $ 231 $ 426
 Sales to AEP Affiliates   -   -   -   -   -
 Fuel and Other Consumables Used for               
  Electric Generation   -   -   -   -   -
 Regulatory Assets (a)   (6,133)   (7,228)   (9,026)   (5,360)   (6,977)
 Regulatory Liabilities (a)   8,166   1,851   390   3   6
 Total Gain (Loss) on Risk Management               
  Contracts $ 1,485 $ 3,829 $ 2,482 $ (5,126) $ (6,545)
                  
 (a) Represents realized and unrealized gains and losses subject to regulatory accounting treatment recorded as either current
  or noncurrent on the condensed balance sheets.
Impact of Cash Flow Hedges on the Condensed Balance Sheet
 Impact of Cash Flow Hedges on the Registrant Subsidiaries’
 Condensed Balance Sheets
 September 30, 2013
  
    Hedging Assets (a) Hedging Liabilities (a) AOCI Gain (Loss) Net of Tax
      Interest Rate   Interest Rate   Interest Rate
      and Foreign    and Foreign    and Foreign
 Company Commodity Currency Commodity Currency Commodity Currency
    (in thousands)
 APCo $ 307 $ - $ 430 $ - $ (34) $ 2,836
 I&M   199   -   278   -   (19)   (16,386)
 OPCo   418   -   585   -   (47)   7,076
 PSO   10   -   16   -   (3)   5,891
 SWEPCo   12   -   19   -   (3)   (13,871)

    Expected to be Reclassified to   
    Net Income During the Next   
    Twelve Months   
        Maximum Term for
      Interest Rate Exposure to
      and Foreign  Variability of Future
 Company Commodity Currency Cash Flows
    (in thousands) (in months)
 APCo $ (172) $ (930)   15
 I&M   (113)   (1,640)   15
 OPCo   (236)   1,359   15
 PSO   1   759   15
 SWEPCo   1   (2,267)   15

 Impact of Cash Flow Hedges on the Registrant Subsidiaries’
 Condensed Balance Sheets
 December 31, 2012
  
    Hedging Assets (a) Hedging Liabilities (a) AOCI Gain (Loss) Net of Tax
      Interest Rate   Interest Rate   Interest Rate
      and Foreign    and Foreign    and Foreign
 Company Commodity Currency Commodity Currency Commodity Currency
    (in thousands)
 APCo $ 302 $ - $ 1,355 $ - $ (644) $ 2,077
 I&M   200   -   931   19,524   (446)   (19,647)
 OPCo   416   -   1,903   -   (912)   8,095
 PSO   25   -   -   -   21   6,460
 SWEPCo   24   -   -   -   22   (15,571)

    Expected to be Reclassified to 
    Net Income During the Next 
    Twelve Months 
      Interest Rate 
      and Foreign  
 Company Commodity Currency 
    (in thousands) 
 APCo $ (507) $ (1,013) 
 I&M   (355)   (1,600) 
 OPCo   (720)   1,359 
 PSO   21   759 
 SWEPCo   22   (2,267) 

(a)       Hedging Assets and Hedging Liabilities are included in Risk Management Assets and Liabilities on the condensed balance sheets.

Collateral Required Under Various Triggering Events
    September 30, 2013
    Liabilities for Amount of Collateral the Amount
    Derivative Contracts Registrant Subsidiaries Attributable to
    with Credit Would Have Been RTO and ISO
 Company Downgrade Triggers Required to Post Activities
    (in thousands)
 APCo $ 850 $ 6,183 $ 5,812
 I&M   560   4,069   3,824
 OPCo   1,167   8,484   7,975
 PSO   -   255   200
 SWEPCo   -   315   247

    December 31, 2012
    Liabilities for Amount of Collateral the Amount
    Derivative Contracts Registrant Subsidiaries Attributable to
    with Credit  Would Have Been RTO and ISO
 Company Downgrade Triggers Required to Post Activities
    (in thousands)
 APCo $ 2,159 $ 3,699 $ 3,510
 I&M   1,483   2,540   2,411
 OPCo   3,034   5,198   4,933
 PSO   -   1,509   1,429
 SWEPCo   -   1,778   1,683
Liabilities Subject to Cross Default Provisions
    September 30, 2013
    Liabilities for   Additional
    Contracts with Cross   Settlement
    Default Provisions   Liability if Cross
    Prior to Contractual Amount of Cash Default Provision
 Company Netting Arrangements Collateral Posted is Triggered
    (in thousands)
 APCo $ 27,044 $ - $ 22,162
 I&M   17,796   -   14,583
 OPCo   37,110   -   30,410
 PSO   5   -   5
 SWEPCo   6   -   6
            
    December 31, 2012
    Liabilities for   Additional
    Contracts with Cross   Settlement
    Default Provisions   Liability if Cross
    Prior to Contractual Amount of Cash Default Provision
 Company Netting Arrangements Collateral Posted is Triggered
    (in thousands)
 APCo $ 49,465 $ 1,822 $ 30,160
 I&M   53,499   1,252   40,240
 OPCo   69,516   2,561   42,386
 PSO   -   -   -
 SWEPCo   -   -   -