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Comprehensive Income (Tables)
6 Months Ended
Jun. 30, 2013
Changes in Accumulated Other Comprehensive Income by Component
Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Three Months Ended June 30, 2013
 
   Cash Flow Hedges         
      Interest Rate and Securities Pension   
   Commodity Foreign Currency Available for Sale and OPEB Total
   (in millions)
Balance in AOCI as of March 31, 2013$ 12 $ (26) $ 5 $ (297) $ (306)
Change in Fair Value Recognized in AOCI  (8)   (1)   -   -   (9)
Amounts Reclassified from AOCI  (3)   2   -   3   2
Net Current Period Other              
  Comprehensive Income  (11)   1   -   3   (7)
Balance in AOCI as of June 30, 2013$ 1 $ (25) $ 5 $ (294) $ (313)

Changes in Accumulated Other Comprehensive Income (Loss) by Component
For the Six Months Ended June 30, 2013
 
   Cash Flow Hedges         
      Interest Rate and Securities Pension   
   Commodity Foreign Currency Available for Sale and OPEB Total
   (in millions)
Balance in AOCI as of December 31, 2012$ (8) $ (30) $ 4 $ (303) $ (337)
Change in Fair Value Recognized in AOCI  10   2   1   -   13
Amounts Reclassified from AOCI  (1)   3   -   9   11
Net Current Period Other              
  Comprehensive Income  9   5   1   9   24
Balance in AOCI as of June 30, 2013$ 1 $ (25) $ 5 $ (294) $ (313)
Reclassifications from Accumulated Other Comprehensive Income
 Reclassifications from Accumulated Other Comprehensive Income (Loss)
 For the Three Months Ended June 30, 2013
       
     Amount of
     (Gain) Loss
     Reclassified
     from AOCI
 Gains and Losses on Cash Flow Hedges (in millions)
 Commodity:   
   Utility Operations Revenues $ -
   Other Revenues   (2)
   Purchased Electricity for Resale   (2)
   Property, Plant and Equipment   -
   Regulatory Assets (a)   -
 Subtotal - Commodity   (4)
       
 Interest Rate and Foreign Currency:   
   Interest Expense   2
 Subtotal - Interest Rate and Foreign Currency   2
       
 Reclassifications from AOCI, before Income Tax (Expense) Credit   (2)
 Income Tax (Expense) Credit   (1)
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   (1)
     
 Gains and Losses on Available-for-Sale Securities   
 Interest Income   -
 Interest Expense   -
 Reclassifications from AOCI, before Income Tax (Expense) Credit   -
 Income Tax (Expense) Credit   -
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   -
      
 Amortization of Pension and OPEB   
 Prior Service Cost (Credit)   (4)
 Actuarial (Gains)/Losses   9
 Reclassifications from AOCI, before Income Tax (Expense) Credit   5
 Income Tax (Expense) Credit   2
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   3
       
 Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit $ 2

 Reclassifications from Accumulated Other Comprehensive Income (Loss)
 For the Six Months Ended June 30, 2013
       
     Amount of
     (Gain) Loss
     Reclassified
     from AOCI
 Gains and Losses on Cash Flow Hedges (in millions)
 Commodity:   
   Utility Operations Revenues $ -
   Other Revenues   (5)
   Purchased Electricity for Resale   4
   Property, Plant and Equipment   -
   Regulatory Assets (a)   -
 Subtotal - Commodity   (1)
       
 Interest Rate and Foreign Currency:   
   Interest Expense   4
 Subtotal - Interest Rate and Foreign Currency   4
       
 Reclassifications from AOCI, before Income Tax (Expense) Credit   3
 Income Tax (Expense) Credit   1
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   2
     
 Gains and Losses on Available-for-Sale Securities   
 Interest Income   -
 Interest Expense   -
 Reclassifications from AOCI, before Income Tax (Expense) Credit   -
 Income Tax (Expense) Credit   -
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   -
      
 Amortization of Pension and OPEB   
 Prior Service Cost (Credit)   (9)
 Actuarial (Gains)/Losses   23
 Reclassifications from AOCI, before Income Tax (Expense) Credit   14
 Income Tax (Expense) Credit   5
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   9
       
 Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit $ 11

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

Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 For the Three Months Ended June 30, 2012
        Interest Rate   
        and Foreign    
     Commodity Currency Total
     (in millions)
 Balance in AOCI as of March 31, 2012 $ (16) $ (18) $ (34)
 Changes in Fair Value Recognized in AOCI   (3)   (13)   (16)
 Amount of (Gain) or Loss Reclassified from AOCI         
  to Statement of Income/within Balance Sheet:         
   Utility Operations Revenues   -   -   -
   Other Revenues   (2)   -   (2)
   Purchased Electricity for Resale   6   -   6
   Interest Expense   -   1   1
   Regulatory Assets (a)   1   -   1
 Balance in AOCI as of June 30, 2012 $ (14) $ (30) $ (44)

 Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 For the Six Months Ended June 30, 2012
        Interest Rate   
        and Foreign    
     Commodity Currency Total
     (in millions)
 Balance in AOCI as of December 31, 2011 $ (3) $ (20) $ (23)
 Changes in Fair Value Recognized in AOCI   (23)   (12)   (35)
 Amount of (Gain) or Loss Reclassified from AOCI         
  to Statement of Income/within Balance Sheet:         
   Utility Operations Revenues   -   -   -
   Other Revenues   (3)   -   (3)
   Purchased Electricity for Resale   13   -   13
   Interest Expense   -   2   2
   Regulatory Assets (a)   2   -   2
 Balance in AOCI as of June 30, 2012 $ (14) $ (30) $ (44)

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

Total Accumulated Other Comprehensive Income (Loss) Activity for Securities Available for Sale
 Total Accumulated Other Comprehensive Income (Loss) Activity for Securities Available for Sale
 For the Three Months Ended June 30, 2012
       
     (in millions)
 Balance in AOCI as of March 31, 2012 $ 4
 Changes in Fair Value Recognized in AOCI   (1)
 Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income:   
   Interest Income   -
 Balance in AOCI as of June 30, 2012 $ 3

 Total Accumulated Other Comprehensive Income (Loss) Activity for Securities Available for Sale
 For the Six Months Ended June 30, 2012
       
     (in millions)
 Balance in AOCI as of December 31, 2011 $ 2
 Changes in Fair Value Recognized in AOCI   1
 Amount of (Gain) or Loss Reclassified from AOCI to Statement of Income:   
   Interest Income   -
 Balance in AOCI as of June 30, 2012 $ 3
Appalachian Power Co [Member]
 
Changes in Accumulated Other Comprehensive Income by Component
APCo           
 Changes in Accumulated Other Comprehensive Income (Loss) by Component
 For the Three Months Ended June 30, 2013
             
    Cash Flow Hedges      
       Interest Rate and Pension   
    Commodity Foreign Currency and OPEB Total
    (in thousands)
 Balance in AOCI as of March 31, 2013$ 361 $ 2,330 $ (30,973) $ (28,282)
 Change in Fair Value Recognized in AOCI  (63)   1   -   (62)
 Amounts Reclassified from AOCI  (101)   252   358   509
 Net Current Period Other           
   Comprehensive Income  (164)   253   358   447
 Balance in AOCI as of June 30, 2013$ 197 $ 2,583 $ (30,615) $ (27,835)

APCo
 Changes in Accumulated Other Comprehensive Income (Loss) by Component
 For the Six Months Ended June 30, 2013
             
    Cash Flow Hedges      
       Interest Rate and Pension   
    Commodity Foreign Currency and OPEB Total
    (in thousands)
 Balance in AOCI as of December 31, 2012$ (644) $ 2,077 $ (31,331) $ (29,898)
 Change in Fair Value Recognized in AOCI  731   -   -   731
 Amounts Reclassified from AOCI  110   506   716   1,332
 Net Current Period Other           
   Comprehensive Income  841   506   716   2,063
 Balance in AOCI as of June 30, 2013$ 197 $ 2,583 $ (30,615) $ (27,835)
Reclassifications from Accumulated Other Comprehensive Income
APCo
 Reclassifications from Accumulated Other Comprehensive Income (Loss)
 For the Three Months Ended June 30, 2013
     
     Amount of
     (Gain) Loss
      Reclassified
     from AOCI
 Gains and Losses on Cash Flow Hedges (in thousands)
 Commodity:   
   Electric Generation, Transmission and Distribution Revenues $ 2
   Purchased Electricity for Resale   (31)
   Other Operation Expense   (13)
   Maintenance Expense   (2)
   Property, Plant and Equipment   (5)
   Regulatory Assets (a)   (108)
 Subtotal - Commodity   (157)
       
 Interest Rate and Foreign Currency:   
   Interest Expense   389
 Subtotal - Interest Rate and Foreign Currency   389
       
 Reclassifications from AOCI, before Income Tax (Expense) Credit   232
 Income Tax (Expense) Credit   81
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   151
     
 Amortization of Pension and OPEB   
 Prior Service Cost (Credit)   (1,283)
 Actuarial (Gains)/Losses   1,834
 Reclassifications from AOCI, before Income Tax (Expense) Credit   551
 Income Tax (Expense) Credit   193
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   358
       
 Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit $ 509

APCo   
 Reclassifications from Accumulated Other Comprehensive Income (Loss)
 For the Six Months Ended June 30, 2013
     
     Amount of
     (Gain) Loss
      Reclassified
     from AOCI
 Gains and Losses on Cash Flow Hedges (in thousands)
 Commodity:   
   Electric Generation, Transmission and Distribution Revenues $ 22
   Purchased Electricity for Resale   26
   Other Operation Expense   (24)
   Maintenance Expense   (18)
   Property, Plant and Equipment   (19)
   Regulatory Assets (a)   181
 Subtotal - Commodity   168
       
 Interest Rate and Foreign Currency:   
   Interest Expense   779
 Subtotal - Interest Rate and Foreign Currency   779
       
 Reclassifications from AOCI, before Income Tax (Expense) Credit   947
 Income Tax (Expense) Credit   331
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   616
     
 Amortization of Pension and OPEB   
 Prior Service Cost (Credit)   (2,565)
 Actuarial (Gains)/Losses   3,667
 Reclassifications from AOCI, before Income Tax (Expense) Credit   1,102
 Income Tax (Expense) Credit   386
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   716
       
 Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit $ 1,332

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

Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 For the Three Months Ended June 30, 2012
  
 Commodity Contracts APCo I&M OPCo PSO SWEPCo
   (in thousands)
 Balance in AOCI as of March 31, 2012 $ (2,117) $ (1,508) $ (3,149) $ 67 $ 66
 Changes in Fair Value Recognized in AOCI   (403)   (234)   (525)   (155)   (149)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   157   419   1,099   -   -
   Other Operation Expense   (14)   (8)   (19)   (9)   (7)
   Maintenance Expense   (6)   (3)   (8)   (2)   (2)
   Property, Plant and Equipment   (10)   (6)   (13)   (3)   (5)
   Regulatory Assets (a)   576   103   -   -   -
 Balance in AOCI as of June 30, 2012 $ (1,820) $ (1,246) $ (2,639) $ (102) $ (97)
                    
 Interest Rate and               
 Foreign Currency Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of March 31, 2012 $ 1,293 $ (11,320) $ 9,114 $ 7,029 $ (17,365)
 Changes in Fair Value Recognized in AOCI   -   (7,844)   -   -   (1)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Depreciation and Amortization               
    Expense   -   -   1   -   -
   Interest Expense   269   149   (341)   (190)   560
 Balance in AOCI as of June 30, 2012 $ 1,562 $ (19,015) $ 8,774 $ 6,839 $ (16,806)
                    
 Total Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of March 31, 2012 $ (824) $ (12,828) $ 5,965 $ 7,096 $ (17,299)
 Changes in Fair Value Recognized in AOCI   (403)   (8,078)   (525)   (155)   (150)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   157   419   1,099   -   -
   Other Operation Expense   (14)   (8)   (19)   (9)   (7)
   Maintenance Expense   (6)   (3)   (8)   (2)   (2)
   Depreciation and Amortization               
    Expense   -   -   1   -   -
   Interest Expense   269   149   (341)   (190)   560
   Property, Plant and Equipment   (10)   (6)   (13)   (3)   (5)
   Regulatory Assets (a)   576   103   -   -   -
 Balance in AOCI as of June 30, 2012 $ (258) $ (20,261) $ 6,135 $ 6,737 $ (16,903)

 Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 For the Six Months Ended June 30, 2012
                    
 Commodity Contracts APCo I&M OPCo PSO SWEPCo
   (in thousands)
 Balance in AOCI as of December 31, 2011 $ (1,309) $ (819) $ (1,748) $ (69) $ (62)
 Changes in Fair Value Recognized in AOCI   (2,248)   (1,628)   (3,402)   (16)   (17)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   376   986   2,585   -   -
   Other Operation Expense   (16)   (10)   (24)   (11)   (9)
   Maintenance Expense   (9)   (4)   (10)   (2)   (3)
   Property, Plant and Equipment   (12)   (7)   (16)   (4)   (6)
   Regulatory Assets (a)   1,401   245   -   -   -
 Balance in AOCI as of June 30, 2012 $ (1,820) $ (1,246) $ (2,639) $ (102) $ (97)
                    
 Interest Rate and               
 Foreign Currency Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of December 31, 2011 $ 1,024 $ (14,465) $ 9,454 $ 7,218 $ (15,462)
 Changes in Fair Value Recognized in AOCI   -   (4,848)   -   -   (2,777)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Depreciation and Amortization               
    Expense   -   -   2   -   -
   Interest Expense   538   298   (682)   (379)   1,433
 Balance in AOCI as of June 30, 2012 $ 1,562 $ (19,015) $ 8,774 $ 6,839 $ (16,806)
                    
 Total Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of December 31, 2011 $ (285) $ (15,284) $ 7,706 $ 7,149 $ (15,524)
 Changes in Fair Value Recognized in AOCI   (2,248)   (6,476)   (3,402)   (16)   (2,794)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   376   986   2,585   -   -
   Other Operation Expense   (16)   (10)   (24)   (11)   (9)
   Maintenance Expense   (9)   (4)   (10)   (2)   (3)
   Depreciation and Amortization               
    Expense   -   -   2   -   -
   Interest Expense   538   298   (682)   (379)   1,433
   Property, Plant and Equipment   (12)   (7)   (16)   (4)   (6)
   Regulatory Assets (a)   1,401   245   -   -   -
 Balance in AOCI as of June 30, 2012 $ (258) $ (20,261) $ 6,135 $ 6,737 $ (16,903)

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

Indiana Michigan Power Co [Member]
 
Changes in Accumulated Other Comprehensive Income by Component
I&M           
 Changes in Accumulated Other Comprehensive Income (Loss) by Component
 For the Three Months Ended June 30, 2013
             
    Cash Flow Hedges      
       Interest Rate and Pension   
    Commodity Foreign Currency and OPEB Total
    (in thousands)
 Balance in AOCI as of March 31, 2013$ 236 $ (17,206) $ (8,614) $ (25,584)
 Change in Fair Value Recognized in AOCI  (40)   (1)   -   (41)
 Amounts Reclassified from AOCI  (49)   411   175   537
 Net Current Period Other           
   Comprehensive Income  (89)   410   175   496
 Balance in AOCI as of June 30, 2013$ 147 $ (16,796) $ (8,439) $ (25,088)

I&M           
 Changes in Accumulated Other Comprehensive Income (Loss) by Component
 For the Six Months Ended June 30, 2013
             
    Cash Flow Hedges      
       Interest Rate and Pension   
    Commodity Foreign Currency and OPEB Total
    (in thousands)
 Balance in AOCI as of December 31, 2012$ (446) $ (19,647) $ (8,790) $ (28,883)
 Change in Fair Value Recognized in AOCI  492   2,248   -   2,740
 Amounts Reclassified from AOCI  101   603   351   1,055
 Net Current Period Other           
   Comprehensive Income  593   2,851   351   3,795
 Balance in AOCI as of June 30, 2013$ 147 $ (16,796) $ (8,439) $ (25,088)
Reclassifications from Accumulated Other Comprehensive Income
I&M
 Reclassifications from Accumulated Other Comprehensive Income (Loss)
 For the Three Months Ended June 30, 2013
     
     Amount of
     (Gain) Loss
     Reclassified
     from AOCI
 Gains and Losses on Cash Flow Hedges (in thousands)
 Commodity:   
   Electric Generation, Transmission and Distribution Revenues $ 32
   Purchased Electricity for Resale   (81)
   Other Operation Expense   (8)
   Maintenance Expense   (2)
   Property, Plant and Equipment   (3)
   Regulatory Assets (a)   (12)
 Subtotal - Commodity   (74)
       
 Interest Rate and Foreign Currency:   
   Interest Expense   631
 Subtotal - Interest Rate and Foreign Currency   631
       
 Reclassifications from AOCI, before Income Tax (Expense) Credit   557
 Income Tax (Expense) Credit   195
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   362
     
 Amortization of Pension and OPEB   
 Prior Service Cost (Credit)   (198)
 Actuarial (Gains)/Losses   468
 Reclassifications from AOCI, before Income Tax (Expense) Credit   270
 Income Tax (Expense) Credit   95
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   175
       
 Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit $ 537

I&M   
 Reclassifications from Accumulated Other Comprehensive Income (Loss)
 For the Six Months Ended June 30, 2013
     
     Amount of
     (Gain) Loss
     Reclassified
     from AOCI
 Gains and Losses on Cash Flow Hedges (in thousands)
 Commodity:   
   Electric Generation, Transmission and Distribution Revenues $ 84
   Purchased Electricity for Resale   68
   Other Operation Expense   (15)
   Maintenance Expense   (9)
   Property, Plant and Equipment   (10)
   Regulatory Assets (a)   38
 Subtotal - Commodity   156
       
 Interest Rate and Foreign Currency:   
   Interest Expense   927
 Subtotal - Interest Rate and Foreign Currency   927
       
 Reclassifications from AOCI, before Income Tax (Expense) Credit   1,083
 Income Tax (Expense) Credit   379
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   704
     
 Amortization of Pension and OPEB   
 Prior Service Cost (Credit)   (397)
 Actuarial (Gains)/Losses   937
 Reclassifications from AOCI, before Income Tax (Expense) Credit   540
 Income Tax (Expense) Credit   189
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   351
       
 Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit $ 1,055

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

Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 For the Three Months Ended June 30, 2012
  
 Commodity Contracts APCo I&M OPCo PSO SWEPCo
   (in thousands)
 Balance in AOCI as of March 31, 2012 $ (2,117) $ (1,508) $ (3,149) $ 67 $ 66
 Changes in Fair Value Recognized in AOCI   (403)   (234)   (525)   (155)   (149)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   157   419   1,099   -   -
   Other Operation Expense   (14)   (8)   (19)   (9)   (7)
   Maintenance Expense   (6)   (3)   (8)   (2)   (2)
   Property, Plant and Equipment   (10)   (6)   (13)   (3)   (5)
   Regulatory Assets (a)   576   103   -   -   -
 Balance in AOCI as of June 30, 2012 $ (1,820) $ (1,246) $ (2,639) $ (102) $ (97)
                    
 Interest Rate and               
 Foreign Currency Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of March 31, 2012 $ 1,293 $ (11,320) $ 9,114 $ 7,029 $ (17,365)
 Changes in Fair Value Recognized in AOCI   -   (7,844)   -   -   (1)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Depreciation and Amortization               
    Expense   -   -   1   -   -
   Interest Expense   269   149   (341)   (190)   560
 Balance in AOCI as of June 30, 2012 $ 1,562 $ (19,015) $ 8,774 $ 6,839 $ (16,806)
                    
 Total Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of March 31, 2012 $ (824) $ (12,828) $ 5,965 $ 7,096 $ (17,299)
 Changes in Fair Value Recognized in AOCI   (403)   (8,078)   (525)   (155)   (150)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   157   419   1,099   -   -
   Other Operation Expense   (14)   (8)   (19)   (9)   (7)
   Maintenance Expense   (6)   (3)   (8)   (2)   (2)
   Depreciation and Amortization               
    Expense   -   -   1   -   -
   Interest Expense   269   149   (341)   (190)   560
   Property, Plant and Equipment   (10)   (6)   (13)   (3)   (5)
   Regulatory Assets (a)   576   103   -   -   -
 Balance in AOCI as of June 30, 2012 $ (258) $ (20,261) $ 6,135 $ 6,737 $ (16,903)

 Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 For the Six Months Ended June 30, 2012
                    
 Commodity Contracts APCo I&M OPCo PSO SWEPCo
   (in thousands)
 Balance in AOCI as of December 31, 2011 $ (1,309) $ (819) $ (1,748) $ (69) $ (62)
 Changes in Fair Value Recognized in AOCI   (2,248)   (1,628)   (3,402)   (16)   (17)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   376   986   2,585   -   -
   Other Operation Expense   (16)   (10)   (24)   (11)   (9)
   Maintenance Expense   (9)   (4)   (10)   (2)   (3)
   Property, Plant and Equipment   (12)   (7)   (16)   (4)   (6)
   Regulatory Assets (a)   1,401   245   -   -   -
 Balance in AOCI as of June 30, 2012 $ (1,820) $ (1,246) $ (2,639) $ (102) $ (97)
                    
 Interest Rate and               
 Foreign Currency Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of December 31, 2011 $ 1,024 $ (14,465) $ 9,454 $ 7,218 $ (15,462)
 Changes in Fair Value Recognized in AOCI   -   (4,848)   -   -   (2,777)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Depreciation and Amortization               
    Expense   -   -   2   -   -
   Interest Expense   538   298   (682)   (379)   1,433
 Balance in AOCI as of June 30, 2012 $ 1,562 $ (19,015) $ 8,774 $ 6,839 $ (16,806)
                    
 Total Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of December 31, 2011 $ (285) $ (15,284) $ 7,706 $ 7,149 $ (15,524)
 Changes in Fair Value Recognized in AOCI   (2,248)   (6,476)   (3,402)   (16)   (2,794)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   376   986   2,585   -   -
   Other Operation Expense   (16)   (10)   (24)   (11)   (9)
   Maintenance Expense   (9)   (4)   (10)   (2)   (3)
   Depreciation and Amortization               
    Expense   -   -   2   -   -
   Interest Expense   538   298   (682)   (379)   1,433
   Property, Plant and Equipment   (12)   (7)   (16)   (4)   (6)
   Regulatory Assets (a)   1,401   245   -   -   -
 Balance in AOCI as of June 30, 2012 $ (258) $ (20,261) $ 6,135 $ 6,737 $ (16,903)

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

Ohio Power Co [Member]
 
Changes in Accumulated Other Comprehensive Income by Component
OPCo
 Changes in Accumulated Other Comprehensive Income (Loss) by Component
 For the Three Months Ended June 30, 2013
             
    Cash Flow Hedges      
       Interest Rate and Pension   
    Commodity Foreign Currency and OPEB Total
    (in thousands)
 Balance in AOCI as of March 31, 2013$ 494 $ 7,755 $ (169,639) $ (161,390)
 Change in Fair Value Recognized in AOCI  (109)   -   -   (109)
 Amounts Reclassified from AOCI  (96)   (340)   3,270   2,834
 Net Current Period Other           
   Comprehensive Income  (205)   (340)   3,270   2,725
 Balance in AOCI as of June 30, 2013$ 289 $ 7,415 $ (166,369) $ (158,665)

OPCo           
 Changes in Accumulated Other Comprehensive Income (Loss) by Component
 For the Six Months Ended June 30, 2013
             
    Cash Flow Hedges      
       Interest Rate and Pension   
    Commodity Foreign Currency and OPEB Total
    (in thousands)
 Balance in AOCI as of December 31, 2012$ (912) $ 8,095 $ (172,908) $ (165,725)
 Change in Fair Value Recognized in AOCI  993   -   -   993
 Amounts Reclassified from AOCI  208   (680)   6,539   6,067
 Net Current Period Other           
   Comprehensive Income  1,201   (680)   6,539   7,060
 Balance in AOCI as of June 30, 2013$ 289 $ 7,415 $ (166,369) $ (158,665)
Reclassifications from Accumulated Other Comprehensive Income
OPCo
 Reclassifications from Accumulated Other Comprehensive Income (Loss)
 For the Three Months Ended June 30, 2013
     
     Amount of
     (Gain) Loss
     Reclassified
     from AOCI
 Gains and Losses on Cash Flow Hedges (in thousands)
 Commodity:   
   Electric Generation, Transmission and Distribution Revenues $ 81
   Purchased Electricity for Resale   (202)
   Other Operation Expense   (19)
   Maintenance Expense   (3)
   Property, Plant and Equipment   (4)
 Subtotal - Commodity   (147)
       
 Interest Rate and Foreign Currency:   
   Depreciation and Amortization Expense   1
   Interest Expense   (525)
 Subtotal - Interest Rate and Foreign Currency   (524)
       
 Reclassifications from AOCI, before Income Tax (Expense) Credit   (671)
 Income Tax (Expense) Credit   (235)
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   (436)
     
 Amortization of Pension and OPEB   
 Prior Service Cost (Credit)   (1,469)
 Actuarial (Gains)/Losses   6,499
 Reclassifications from AOCI, before Income Tax (Expense) Credit   5,030
 Income Tax (Expense) Credit   1,760
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   3,270
       
 Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit $ 2,834

OPCo   
 Reclassifications from Accumulated Other Comprehensive Income (Loss)
 For the Six Months Ended June 30, 2013
     
     Amount of
     (Gain) Loss
     Reclassified
     from AOCI
 Gains and Losses on Cash Flow Hedges (in thousands)
 Commodity:   
   Electric Generation, Transmission and Distribution Revenues $ 215
   Purchased Electricity for Resale   180
   Other Operation Expense   (37)
   Maintenance Expense   (15)
   Property, Plant and Equipment   (23)
 Subtotal - Commodity   320
       
 Interest Rate and Foreign Currency:   
   Depreciation and Amortization Expense   3
   Interest Expense   (1,049)
 Subtotal - Interest Rate and Foreign Currency   (1,046)
       
 Reclassifications from AOCI, before Income Tax (Expense) Credit   (726)
 Income Tax (Expense) Credit   (254)
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   (472)
     
 Amortization of Pension and OPEB   
 Prior Service Cost (Credit)   (2,937)
 Actuarial (Gains)/Losses   12,996
 Reclassifications from AOCI, before Income Tax (Expense) Credit   10,059
 Income Tax (Expense) Credit   3,520
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   6,539
       
 Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit $ 6,067
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 For the Three Months Ended June 30, 2012
  
 Commodity Contracts APCo I&M OPCo PSO SWEPCo
   (in thousands)
 Balance in AOCI as of March 31, 2012 $ (2,117) $ (1,508) $ (3,149) $ 67 $ 66
 Changes in Fair Value Recognized in AOCI   (403)   (234)   (525)   (155)   (149)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   157   419   1,099   -   -
   Other Operation Expense   (14)   (8)   (19)   (9)   (7)
   Maintenance Expense   (6)   (3)   (8)   (2)   (2)
   Property, Plant and Equipment   (10)   (6)   (13)   (3)   (5)
   Regulatory Assets (a)   576   103   -   -   -
 Balance in AOCI as of June 30, 2012 $ (1,820) $ (1,246) $ (2,639) $ (102) $ (97)
                    
 Interest Rate and               
 Foreign Currency Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of March 31, 2012 $ 1,293 $ (11,320) $ 9,114 $ 7,029 $ (17,365)
 Changes in Fair Value Recognized in AOCI   -   (7,844)   -   -   (1)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Depreciation and Amortization               
    Expense   -   -   1   -   -
   Interest Expense   269   149   (341)   (190)   560
 Balance in AOCI as of June 30, 2012 $ 1,562 $ (19,015) $ 8,774 $ 6,839 $ (16,806)
                    
 Total Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of March 31, 2012 $ (824) $ (12,828) $ 5,965 $ 7,096 $ (17,299)
 Changes in Fair Value Recognized in AOCI   (403)   (8,078)   (525)   (155)   (150)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   157   419   1,099   -   -
   Other Operation Expense   (14)   (8)   (19)   (9)   (7)
   Maintenance Expense   (6)   (3)   (8)   (2)   (2)
   Depreciation and Amortization               
    Expense   -   -   1   -   -
   Interest Expense   269   149   (341)   (190)   560
   Property, Plant and Equipment   (10)   (6)   (13)   (3)   (5)
   Regulatory Assets (a)   576   103   -   -   -
 Balance in AOCI as of June 30, 2012 $ (258) $ (20,261) $ 6,135 $ 6,737 $ (16,903)

 Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 For the Six Months Ended June 30, 2012
                    
 Commodity Contracts APCo I&M OPCo PSO SWEPCo
   (in thousands)
 Balance in AOCI as of December 31, 2011 $ (1,309) $ (819) $ (1,748) $ (69) $ (62)
 Changes in Fair Value Recognized in AOCI   (2,248)   (1,628)   (3,402)   (16)   (17)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   376   986   2,585   -   -
   Other Operation Expense   (16)   (10)   (24)   (11)   (9)
   Maintenance Expense   (9)   (4)   (10)   (2)   (3)
   Property, Plant and Equipment   (12)   (7)   (16)   (4)   (6)
   Regulatory Assets (a)   1,401   245   -   -   -
 Balance in AOCI as of June 30, 2012 $ (1,820) $ (1,246) $ (2,639) $ (102) $ (97)
                    
 Interest Rate and               
 Foreign Currency Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of December 31, 2011 $ 1,024 $ (14,465) $ 9,454 $ 7,218 $ (15,462)
 Changes in Fair Value Recognized in AOCI   -   (4,848)   -   -   (2,777)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Depreciation and Amortization               
    Expense   -   -   2   -   -
   Interest Expense   538   298   (682)   (379)   1,433
 Balance in AOCI as of June 30, 2012 $ 1,562 $ (19,015) $ 8,774 $ 6,839 $ (16,806)
                    
 Total Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of December 31, 2011 $ (285) $ (15,284) $ 7,706 $ 7,149 $ (15,524)
 Changes in Fair Value Recognized in AOCI   (2,248)   (6,476)   (3,402)   (16)   (2,794)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   376   986   2,585   -   -
   Other Operation Expense   (16)   (10)   (24)   (11)   (9)
   Maintenance Expense   (9)   (4)   (10)   (2)   (3)
   Depreciation and Amortization               
    Expense   -   -   2   -   -
   Interest Expense   538   298   (682)   (379)   1,433
   Property, Plant and Equipment   (12)   (7)   (16)   (4)   (6)
   Regulatory Assets (a)   1,401   245   -   -   -
 Balance in AOCI as of June 30, 2012 $ (258) $ (20,261) $ 6,135 $ 6,737 $ (16,903)

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

Public Service Co Of Oklahoma [Member]
 
Changes in Accumulated Other Comprehensive Income by Component
PSO            
 Changes in Accumulated Other Comprehensive Income (Loss) by Component 
 For the Three Months Ended June 30, 2013 
           
    Cash Flow Hedges    
       Interest Rate and    
    Commodity Foreign Currency Total 
             
    (in thousands) 
 Balance in AOCI as of March 31, 2013$ 44 $ 6,270 $ 6,314 
 Change in Fair Value Recognized in AOCI  (61)   1   (60) 
 Amounts Reclassified from AOCI  (4)   (190)   (194) 
 Net Current Period Other         
   Comprehensive Income  (65)   (189)   (254) 
 Balance in AOCI as of June 30, 2013$ (21) $ 6,081 $ 6,060 

PSO         
 Changes in Accumulated Other Comprehensive Income (Loss) by Component 
 For the Six Months Ended June 30, 2013 
           
    Cash Flow Hedges    
       Interest Rate and    
    Commodity Foreign Currency Total 
    (in thousands) 
 Balance in AOCI as of December 31, 2012$ 21 $ 6,460 $ 6,481 
 Change in Fair Value Recognized in AOCI  (25)   1   (24) 
 Amounts Reclassified from AOCI  (17)   (380)   (397) 
 Net Current Period Other         
   Comprehensive Income  (42)   (379)   (421) 
 Balance in AOCI as of June 30, 2013$ (21) $ 6,081 $ 6,060 
Reclassifications from Accumulated Other Comprehensive Income
PSO
 Reclassifications from Accumulated Other Comprehensive Income (Loss)
 For the Three Months Ended June 30, 2013
     
     Amount of
     (Gain) Loss
     Reclassified
     from AOCI
 Gains and Losses on Cash Flow Hedges (in thousands)
 Commodity:   
   Other Operation Expense $ (6)
   Maintenance Expense   -
   Property, Plant and Equipment   -
 Subtotal - Commodity   (6)
       
 Interest Rate and Foreign Currency:   
   Interest Expense   (292)
 Subtotal - Interest Rate and Foreign Currency   (292)
       
 Reclassifications from AOCI, before Income Tax (Expense) Credit   (298)
 Income Tax (Expense) Credit   (104)
 Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit $ (194)

PSO   
 Reclassifications from Accumulated Other Comprehensive Income (Loss)
 For the Six Months Ended June 30, 2013
     
     Amount of
     (Gain) Loss
     Reclassified
     from AOCI
 Gains and Losses on Cash Flow Hedges (in thousands)
 Commodity:   
   Other Operation Expense $ (15)
   Maintenance Expense   (4)
   Property, Plant and Equipment   (7)
 Subtotal - Commodity   (26)
       
 Interest Rate and Foreign Currency:   
   Interest Expense   (584)
 Subtotal - Interest Rate and Foreign Currency   (584)
       
 Reclassifications from AOCI, before Income Tax (Expense) Credit   (610)
 Income Tax (Expense) Credit   (213)
 Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit $ (397)
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 For the Three Months Ended June 30, 2012
  
 Commodity Contracts APCo I&M OPCo PSO SWEPCo
   (in thousands)
 Balance in AOCI as of March 31, 2012 $ (2,117) $ (1,508) $ (3,149) $ 67 $ 66
 Changes in Fair Value Recognized in AOCI   (403)   (234)   (525)   (155)   (149)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   157   419   1,099   -   -
   Other Operation Expense   (14)   (8)   (19)   (9)   (7)
   Maintenance Expense   (6)   (3)   (8)   (2)   (2)
   Property, Plant and Equipment   (10)   (6)   (13)   (3)   (5)
   Regulatory Assets (a)   576   103   -   -   -
 Balance in AOCI as of June 30, 2012 $ (1,820) $ (1,246) $ (2,639) $ (102) $ (97)
                    
 Interest Rate and               
 Foreign Currency Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of March 31, 2012 $ 1,293 $ (11,320) $ 9,114 $ 7,029 $ (17,365)
 Changes in Fair Value Recognized in AOCI   -   (7,844)   -   -   (1)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Depreciation and Amortization               
    Expense   -   -   1   -   -
   Interest Expense   269   149   (341)   (190)   560
 Balance in AOCI as of June 30, 2012 $ 1,562 $ (19,015) $ 8,774 $ 6,839 $ (16,806)
                    
 Total Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of March 31, 2012 $ (824) $ (12,828) $ 5,965 $ 7,096 $ (17,299)
 Changes in Fair Value Recognized in AOCI   (403)   (8,078)   (525)   (155)   (150)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   157   419   1,099   -   -
   Other Operation Expense   (14)   (8)   (19)   (9)   (7)
   Maintenance Expense   (6)   (3)   (8)   (2)   (2)
   Depreciation and Amortization               
    Expense   -   -   1   -   -
   Interest Expense   269   149   (341)   (190)   560
   Property, Plant and Equipment   (10)   (6)   (13)   (3)   (5)
   Regulatory Assets (a)   576   103   -   -   -
 Balance in AOCI as of June 30, 2012 $ (258) $ (20,261) $ 6,135 $ 6,737 $ (16,903)

 Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 For the Six Months Ended June 30, 2012
                    
 Commodity Contracts APCo I&M OPCo PSO SWEPCo
   (in thousands)
 Balance in AOCI as of December 31, 2011 $ (1,309) $ (819) $ (1,748) $ (69) $ (62)
 Changes in Fair Value Recognized in AOCI   (2,248)   (1,628)   (3,402)   (16)   (17)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   376   986   2,585   -   -
   Other Operation Expense   (16)   (10)   (24)   (11)   (9)
   Maintenance Expense   (9)   (4)   (10)   (2)   (3)
   Property, Plant and Equipment   (12)   (7)   (16)   (4)   (6)
   Regulatory Assets (a)   1,401   245   -   -   -
 Balance in AOCI as of June 30, 2012 $ (1,820) $ (1,246) $ (2,639) $ (102) $ (97)
                    
 Interest Rate and               
 Foreign Currency Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of December 31, 2011 $ 1,024 $ (14,465) $ 9,454 $ 7,218 $ (15,462)
 Changes in Fair Value Recognized in AOCI   -   (4,848)   -   -   (2,777)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Depreciation and Amortization               
    Expense   -   -   2   -   -
   Interest Expense   538   298   (682)   (379)   1,433
 Balance in AOCI as of June 30, 2012 $ 1,562 $ (19,015) $ 8,774 $ 6,839 $ (16,806)
                    
 Total Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of December 31, 2011 $ (285) $ (15,284) $ 7,706 $ 7,149 $ (15,524)
 Changes in Fair Value Recognized in AOCI   (2,248)   (6,476)   (3,402)   (16)   (2,794)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   376   986   2,585   -   -
   Other Operation Expense   (16)   (10)   (24)   (11)   (9)
   Maintenance Expense   (9)   (4)   (10)   (2)   (3)
   Depreciation and Amortization               
    Expense   -   -   2   -   -
   Interest Expense   538   298   (682)   (379)   1,433
   Property, Plant and Equipment   (12)   (7)   (16)   (4)   (6)
   Regulatory Assets (a)   1,401   245   -   -   -
 Balance in AOCI as of June 30, 2012 $ (258) $ (20,261) $ 6,135 $ 6,737 $ (16,903)

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

Southwestern Electric Power Co [Member]
 
Changes in Accumulated Other Comprehensive Income by Component
SWEPCo
 Changes in Accumulated Other Comprehensive Income (Loss) by Component
 For the Three Months Ended June 30, 2013
             
    Cash Flow Hedges      
       Interest Rate and Pension   
    Commodity Foreign Currency and OPEB Total
    (in thousands)
 Balance in AOCI as of March 31, 2013$ 51 $ (15,004) $ (2,374) $ (17,327)
 Change in Fair Value Recognized in AOCI  (71)   -   -   (71)
 Amounts Reclassified from AOCI  (6)   567   (64)   497
 Net Current Period Other           
   Comprehensive Income  (77)   567   (64)   426
 Balance in AOCI as of June 30, 2013$ (26) $ (14,437) $ (2,438) $ (16,901)

SWEPCo           
 Changes in Accumulated Other Comprehensive Income (Loss) by Component
 For the Six Months Ended June 30, 2013
             
    Cash Flow Hedges      
       Interest Rate and Pension   
    Commodity Foreign Currency and OPEB Total
    (in thousands)
 Balance in AOCI as of December 31, 2012$ 22 $ (15,571) $ (2,311) $ (17,860)
 Change in Fair Value Recognized in AOCI  (27)   -   -   (27)
 Amounts Reclassified from AOCI  (21)   1,134   (127)   986
 Net Current Period Other           
   Comprehensive Income  (48)   1,134   (127)   959
 Balance in AOCI as of June 30, 2013$ (26) $ (14,437) $ (2,438) $ (16,901)
Reclassifications from Accumulated Other Comprehensive Income
SWEPCo
 Reclassifications from Accumulated Other Comprehensive Income (Loss)
 For the Three Months Ended June 30, 2013
     
     Amount of
     (Gain) Loss
     Reclassified
     from AOCI
 Gains and Losses on Cash Flow Hedges (in thousands)
 Commodity:   
   Other Operation Expense $ (6)
   Maintenance Expense   (1)
   Property, Plant and Equipment   (1)
 Subtotal - Commodity   (8)
       
 Interest Rate and Foreign Currency:   
   Interest Expense   872
 Subtotal - Interest Rate and Foreign Currency   872
       
 Reclassifications from AOCI, before Income Tax (Expense) Credit   864
 Income Tax (Expense) Credit   303
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   561
     
 Amortization of Pension and OPEB   
 Prior Service Cost (Credit)   (447)
 Actuarial (Gains)/Losses   348
 Reclassifications from AOCI, before Income Tax (Expense) Credit   (99)
 Income Tax (Expense) Credit   (35)
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   (64)
       
 Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit $ 497

SWEPCo   
 Reclassifications from Accumulated Other Comprehensive Income (Loss)
 For the Six Months Ended June 30, 2013
     
     Amount of
     (Gain) Loss
     Reclassified
     from AOCI
 Gains and Losses on Cash Flow Hedges (in thousands)
 Commodity:   
   Other Operation Expense $ (16)
   Maintenance Expense   (7)
   Property, Plant and Equipment   (8)
 Subtotal - Commodity   (31)
       
 Interest Rate and Foreign Currency:   
   Interest Expense   1,744
 Subtotal - Interest Rate and Foreign Currency   1,744
       
 Reclassifications from AOCI, before Income Tax (Expense) Credit   1,713
 Income Tax (Expense) Credit   600
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   1,113
     
 Amortization of Pension and OPEB   
 Prior Service Cost (Credit)   (892)
 Actuarial (Gains)/Losses   696
 Reclassifications from AOCI, before Income Tax (Expense) Credit   (196)
 Income Tax (Expense) Credit   (69)
 Reclassifications from AOCI, Net of Income Tax (Expense) Credit   (127)
       
 Total Reclassifications from AOCI, Net of Income Tax (Expense) Credit $ 986
Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 For the Three Months Ended June 30, 2012
  
 Commodity Contracts APCo I&M OPCo PSO SWEPCo
   (in thousands)
 Balance in AOCI as of March 31, 2012 $ (2,117) $ (1,508) $ (3,149) $ 67 $ 66
 Changes in Fair Value Recognized in AOCI   (403)   (234)   (525)   (155)   (149)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   157   419   1,099   -   -
   Other Operation Expense   (14)   (8)   (19)   (9)   (7)
   Maintenance Expense   (6)   (3)   (8)   (2)   (2)
   Property, Plant and Equipment   (10)   (6)   (13)   (3)   (5)
   Regulatory Assets (a)   576   103   -   -   -
 Balance in AOCI as of June 30, 2012 $ (1,820) $ (1,246) $ (2,639) $ (102) $ (97)
                    
 Interest Rate and               
 Foreign Currency Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of March 31, 2012 $ 1,293 $ (11,320) $ 9,114 $ 7,029 $ (17,365)
 Changes in Fair Value Recognized in AOCI   -   (7,844)   -   -   (1)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Depreciation and Amortization               
    Expense   -   -   1   -   -
   Interest Expense   269   149   (341)   (190)   560
 Balance in AOCI as of June 30, 2012 $ 1,562 $ (19,015) $ 8,774 $ 6,839 $ (16,806)
                    
 Total Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of March 31, 2012 $ (824) $ (12,828) $ 5,965 $ 7,096 $ (17,299)
 Changes in Fair Value Recognized in AOCI   (403)   (8,078)   (525)   (155)   (150)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   157   419   1,099   -   -
   Other Operation Expense   (14)   (8)   (19)   (9)   (7)
   Maintenance Expense   (6)   (3)   (8)   (2)   (2)
   Depreciation and Amortization               
    Expense   -   -   1   -   -
   Interest Expense   269   149   (341)   (190)   560
   Property, Plant and Equipment   (10)   (6)   (13)   (3)   (5)
   Regulatory Assets (a)   576   103   -   -   -
 Balance in AOCI as of June 30, 2012 $ (258) $ (20,261) $ 6,135 $ 6,737 $ (16,903)

 Total Accumulated Other Comprehensive Income (Loss) Activity for Cash Flow Hedges
 For the Six Months Ended June 30, 2012
                    
 Commodity Contracts APCo I&M OPCo PSO SWEPCo
   (in thousands)
 Balance in AOCI as of December 31, 2011 $ (1,309) $ (819) $ (1,748) $ (69) $ (62)
 Changes in Fair Value Recognized in AOCI   (2,248)   (1,628)   (3,402)   (16)   (17)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   376   986   2,585   -   -
   Other Operation Expense   (16)   (10)   (24)   (11)   (9)
   Maintenance Expense   (9)   (4)   (10)   (2)   (3)
   Property, Plant and Equipment   (12)   (7)   (16)   (4)   (6)
   Regulatory Assets (a)   1,401   245   -   -   -
 Balance in AOCI as of June 30, 2012 $ (1,820) $ (1,246) $ (2,639) $ (102) $ (97)
                    
 Interest Rate and               
 Foreign Currency Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of December 31, 2011 $ 1,024 $ (14,465) $ 9,454 $ 7,218 $ (15,462)
 Changes in Fair Value Recognized in AOCI   -   (4,848)   -   -   (2,777)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Depreciation and Amortization               
    Expense   -   -   2   -   -
   Interest Expense   538   298   (682)   (379)   1,433
 Balance in AOCI as of June 30, 2012 $ 1,562 $ (19,015) $ 8,774 $ 6,839 $ (16,806)
                    
 Total Contracts APCo I&M OPCo PSO SWEPCo
      (in thousands)
 Balance in AOCI as of December 31, 2011 $ (285) $ (15,284) $ 7,706 $ 7,149 $ (15,524)
 Changes in Fair Value Recognized in AOCI   (2,248)   (6,476)   (3,402)   (16)   (2,794)
 Amount of (Gain) or Loss Reclassified               
  from AOCI to Statement of Income/within               
  Balance Sheet:               
   Electric Generation, Transmission, and               
    Distribution Revenues   (3)   (9)   (24)   -   -
   Purchased Electricity for Resale   376   986   2,585   -   -
   Other Operation Expense   (16)   (10)   (24)   (11)   (9)
   Maintenance Expense   (9)   (4)   (10)   (2)   (3)
   Depreciation and Amortization               
    Expense   -   -   2   -   -
   Interest Expense   538   298   (682)   (379)   1,433
   Property, Plant and Equipment   (12)   (7)   (16)   (4)   (6)
   Regulatory Assets (a)   1,401   245   -   -   -
 Balance in AOCI as of June 30, 2012 $ (258) $ (20,261) $ 6,135 $ 6,737 $ (16,903)

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