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Financing Activities (Tables)
 9 Months Ended
Sep. 30, 2013
Long-term Debt
 Type of Debt September 30, 2013 December 31, 2012
   (in millions)
 Senior Unsecured Notes $ 11,705 $ 12,712
 Pollution Control Bonds   1,982   1,958
 Notes Payable   425   427
 Securitization Bonds   2,338   2,281
 Spent Nuclear Fuel Obligation (a)   265   265
 Other Long-term Debt    886   140
 Fair Value of Interest Rate Hedges   (7)   3
 Unamortized Discount, Net   (26)   (29)
 Total Long-term Debt Outstanding   17,568   17,757
 Long-term Debt Due Within One Year   1,366   2,171
 Long-term Debt  $ 16,202 $ 15,586

(a)       Pursuant to the Nuclear Waste Policy Act of 1982, I&M, a nuclear licensee, has an obligation to the United States Department of Energy for spent nuclear fuel disposal. The obligation includes a one-time fee for nuclear fuel consumed prior to April 7, 1983. Trust fund assets related to this obligation were $309 million and $308 million as of September 30, 2013 and December 31, 2012, respectively, and are included in Spent Nuclear Fuel and Decommissioning Trusts on our condensed balance sheets.

 
Long-term Debt Issuances
      Principal   Interest  
 Company Type of Debt Amount  Rate Due Date
 Issuances:  (in millions) (%)  
 AEP Other Long-term Debt $ 200(a) Variable 2015
 APCo Pollution Control Bonds   30  3.25 2018
 APCo Pollution Control Bonds   40  3.25 2018
 I&M Notes Payable   101  Variable 2017
 I&M  Senior Unsecured Notes   250  3.20 2023
 OPCo Other Long-term Debt   600(b) Variable 2015
 OPCo Pollution Control Bonds  50  Variable 2014
 OPCo Pollution Control Bonds  65  Variable 2014
 OPCo Securitization Bonds   165  0.96 2018
 OPCo Securitization Bonds   102  2.05 2020
             
 Non-Registrant:          
 AEPTCo Senior Unsecured Notes   25  4.83 2043
 TCC Other Long-term Debt   75(c) Variable 2016
 TCC Pollution Control Bonds  120  4.00 2030
 TNC  Other Long-term Debt   75(d) Variable 2016
 TNC  Senior Unsecured Notes   125  3.09 2023
 TNC  Senior Unsecured Notes   75  4.48 2043
 Total Issuances   $ 2,098(e)    

(a)       Draw on a $1 billion term credit facility that was terminated in July 2013.

(b)       Draw on a $1 billion term credit facility due in May 2015.

(c)       Draw on a $100 million three-year revolving credit facility to be used for general corporate purposes.

(d)       Draw on a $75 million three-year revolving credit facility to be used for general corporate purposes.

(e)       Amount indicated on the statement of cash flows is net of issuance costs and premium or discount and will not tie to the total issuances.

 
Retirements and Principal Payments
      Principal   Interest  
 Company Type of Debt Amount Paid  Rate Due Date
 Retirements and   (in millions) (%)  
  Principal Payments:          
 AEP Other Long-term Debt $ 200(a) Variable 2015
 APCo Pollution Control Bonds   30  4.85 2013
 APCo Pollution Control Bonds   40  4.85 2013
 APCo Senior Unsecured Notes   275  Variable 2013
 I&M Notes Payable   6  5.44 2013
 I&M Notes Payable   10  4.00 2014
 I&M Notes Payable   12  Variable 2015
 I&M Notes Payable   15  Variable 2016
 I&M Notes Payable   10  2.12 2016
 I&M Notes Payable   31  Variable 2016
 I&M Notes Payable   8  Variable 2017
 I&M Other Long-term Debt   4  Variable 2015
 I&M Other Long-term Debt   1  6.00 2025
 I&M Pollution Control Bonds   40  5.25 2025
 OPCo Pollution Control Bonds   56  5.10 2013
 OPCo Pollution Control Bonds   50  5.15 2026
 OPCo Pollution Control Bonds   65  4.90 2037
 OPCo Senior Unsecured Notes   250  5.50 2013
 OPCo Senior Unsecured Notes   250  5.50 2013
 OPCo Senior Unsecured Notes   250  5.75 2013
 OPCo Senior Unsecured Notes   225  6.38 2033
 SWEPCo Notes Payable   3  4.58 2032
             
 Non-Registrant:          
 AEP Subsidiaries Notes Payable   5  Variable 2017
 AEP Subsidiaries Notes Payable   2  7.59 - 8.03 2026
 AEGCo Senior Unsecured Notes   7  6.33 2037
 TCC Securitization Bonds   76  4.98 2013
 TCC Securitization Bonds   67  5.96 2013
 TCC Securitization Bonds   42  5.09 2015
 TCC Securitization Bonds   26  0.88 2017
 TNC Senior Unsecured Notes   225  5.50 2013
 Total Retirements and          
  Principal Payments   $ 2,281     

(a)       Draw on a $1 billion term credit facility that was terminated in July 2013.
Short Term Debt
    September 30, 2013 December 31, 2012
    Outstanding Interest Outstanding Interest
 Type of DebtAmountRate (a) AmountRate (a)
   (in millions)    (in millions)   
 Securitized Debt for Receivables (b) $ 700  0.23% $ 657  0.26%
 Commercial Paper   518  0.31%   321  0.42%
 Line of Credit – Sabine (c)   -  -%   3  1.82%
 Total Short-term Debt $ 1,218    $ 981   

(a)       Weighted average rate.

(b)       Amount of securitized debt for receivables as accounted for under the ''Transfers and Servicing'' accounting guidance.

(c)       This line of credit does not reduce available liquidity under AEP's credit facilities.
Comparative Accounts Receivable Information
    Three Months Ended  Nine Months Ended  
    September 30, September 30, 
    2013 2012 2013 2012 
   (dollars in millions) 
 Effective Interest Rates on Securitization of             
  Accounts Receivable   0.23%  0.26%  0.23%  0.26%
 Net Uncollectible Accounts Receivable             
  Written Off $ 12 $ 8 $ 26 $ 21 
Customer Accounts Receivable Managed Portfolio
    September 30, December 31,
    2013 2012
    (in millions)
 Accounts Receivable Retained Interest and Pledged as Collateral      
  Less Uncollectible Accounts $ 965 $ 835
 Total Principal Outstanding   700   657
 Delinquent Securitized Accounts Receivable   60   37
 Bad Debt Reserves Related to Securitization/Sale of Accounts Receivable   17   21
 Unbilled Receivables Related to Securitization/Sale of Accounts Receivable   266   316
Appalachian Power Co [Member]
  
Long-term Debt Issuances
     Principal  Interest  
 Company Type of Debt Amount (a) Rate Due Date
 Issuances:   (in thousands) (%)  
 APCo Pollution Control Bonds $ 30,000 3.25 2018
 APCo Pollution Control Bonds   40,000 3.25 2018
 I&M Notes Payable   101,354 Variable 2017
 I&M Senior Unsecured Notes   250,000 3.20 2023
 OPCo Other Long-term Debt   200,000(b)Variable 2015
 OPCo Other Long-term Debt   600,000(c)Variable 2015
 OPCo Pollution Control Bonds   50,000 Variable 2014
 OPCo Pollution Control Bonds   65,000 Variable 2014
 OPCo Securitization Bonds   164,900 0.96 2018
 OPCo Securitization Bonds   102,508 2.05 2020

(a)       Amounts indicated on the statements of cash flows are net of issuance costs and premium or discount and will not tie to the issuance amounts.

(b)       Intercompany issuance from AEP consisting of a draw on a $1 billion term credit facility that was terminated in July 2013.

(c)       Draw on a $1 billion term credit facility due in May 2015.

 
Retirements and Principal Payments
      Principal  Interest  
 Company Type of Debt Amount Paid Rate Due Date
 Retirements and   (in thousands) (%)  
  Principal Payments:         
 APCo Land Note $ 21 13.718 2026
 APCo Pollution Control Bonds   30,000 4.85 2013
 APCo Pollution Control Bonds   40,000 4.85 2013
 APCo Senior Unsecured Notes   275,000 Variable 2013
 I&M Notes Payable   6,083 5.44 2013
 I&M Notes Payable   9,811 4.00 2014
 I&M Notes Payable   12,071 Variable 2015
 I&M Notes Payable   14,945 Variable 2016
 I&M Notes Payable   10,350 2.12 2016
 I&M Notes Payable   31,289 Variable 2016
 I&M Notes Payable   8,204 Variable 2017
 I&M Other Long-term Debt   705 6.00 2025
 I&M Other Long-term Debt   4,086 Variable 2015
 I&M Pollution Control Bonds   40,000 5.25 2025
 OPCo Other Long-term Debt   200,000(b)Variable 2015
 OPCo Pollution Control Bonds   56,000 5.10 2013
 OPCo Pollution Control Bonds   50,000 5.15 2026
 OPCo Pollution Control Bonds   65,000 4.90 2037
 OPCo Senior Unsecured Notes   250,000 5.50 2013
 OPCo Senior Unsecured Notes   250,000 5.50 2013
 OPCo Senior Unsecured Notes   250,000 5.75 2013
 OPCo Senior Unsecured Notes   225,000 6.38 2033
 PSO Notes Payable   301 3.00 2027
 SWEPCo Notes Payable   3,250 4.58 2032

(b)       Intercompany issuance from AEP consisting of a draw on a $1 billion term credit facility that was terminated in July 2013.

 
Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits
               Net   
               Loans to   
   Maximum Maximum Average Average (Borrowings from) Authorized
   Borrowings Loans  Borrowings Loans  the Utility Short-term
   from the Utility to the Utility from the Utility to the Utility Money Pool as of Borrowing
 Company Money Pool Money Pool Money Pool Money Pool September 30, 2013 Limit
   (in thousands)
 APCo $ 331,771 $ 39,372 $ 126,391 $ 23,632 $ (253,352) $ 600,000
 I&M   23,135   384,435   8,308   239,647   322,476   500,000
 OPCo   410,456   415,605   228,719   59,047   9,401   600,000
 PSO   46,806   52,734   18,658   18,808   19,442   300,000
 SWEPCo   15,386   153,830   4,154   38,449   18,634   350,000
Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool
   Nine Months Ended September 30,
   2013 2012
 Maximum Interest Rate  0.43%  0.56%
 Minimum Interest Rate  0.28%  0.44%
Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool
   Average Interest Rate  Average Interest Rate
   for Funds Borrowed   for Funds Loaned
   from the Utility Money Pool for   to the Utility Money Pool for
   Nine Months Ended September 30, Nine Months Ended September 30,
 Company 2013 20122013 2012
 APCo  0.33%  0.48%  0.34%  0.48%
 I&M  0.36%  -%  0.33%  0.47%
 OPCo  0.34%  0.47%  0.32%  0.50%
 PSO  0.34%  -%  0.32%  0.47%
 SWEPCo  0.33%  0.53%  0.36%  0.47%
Accounts Receivable and Accrued Unbilled Revenues
    September 30, December 31,
 Company 2013 2012
    (in thousands)
 APCo $ 135,579 $ 153,719
 I&M   143,804   123,447
 OPCo   321,054   300,675
 PSO   147,586   85,530
 SWEPCo   180,922   132,449
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
    Three Months Ended September 30, Nine Months Ended September 30,
 Company 2013 2012 2013 2012
    (in thousands)
 APCo $ 1,575 $ 1,703 $ 4,590 $ 5,389
 I&M   1,762   1,674   4,744   4,738
 OPCo   5,076   5,362   14,440   15,900
 PSO   1,549   1,990   4,314   5,547
 SWEPCo   1,649   1,786   4,413   4,720
Proceeds on Sale of Receivables to AEP Credit
    Three Months Ended September 30, Nine Months Ended September 30,
 Company 2013 2012 2013 2012
    (in thousands)
 APCo $ 340,438 $ 351,570 $ 1,081,615 $ 993,975
 I&M   384,316   358,936   1,097,563   1,018,933
 OPCo   658,829   790,115   2,017,746   2,284,749
 PSO   382,167   342,819   944,062   919,343
 SWEPCo   450,294   444,461   1,171,306   1,145,182
Indiana Michigan Power Co [Member]
  
Long-term Debt Issuances
     Principal  Interest  
 Company Type of Debt Amount (a) Rate Due Date
 Issuances:   (in thousands) (%)  
 APCo Pollution Control Bonds $ 30,000 3.25 2018
 APCo Pollution Control Bonds   40,000 3.25 2018
 I&M Notes Payable   101,354 Variable 2017
 I&M Senior Unsecured Notes   250,000 3.20 2023
 OPCo Other Long-term Debt   200,000(b)Variable 2015
 OPCo Other Long-term Debt   600,000(c)Variable 2015
 OPCo Pollution Control Bonds   50,000 Variable 2014
 OPCo Pollution Control Bonds   65,000 Variable 2014
 OPCo Securitization Bonds   164,900 0.96 2018
 OPCo Securitization Bonds   102,508 2.05 2020

(a)       Amounts indicated on the statements of cash flows are net of issuance costs and premium or discount and will not tie to the issuance amounts.

(b)       Intercompany issuance from AEP consisting of a draw on a $1 billion term credit facility that was terminated in July 2013.

(c)       Draw on a $1 billion term credit facility due in May 2015.

 
Retirements and Principal Payments
      Principal  Interest  
 Company Type of Debt Amount Paid Rate Due Date
 Retirements and   (in thousands) (%)  
  Principal Payments:         
 APCo Land Note $ 21 13.718 2026
 APCo Pollution Control Bonds   30,000 4.85 2013
 APCo Pollution Control Bonds   40,000 4.85 2013
 APCo Senior Unsecured Notes   275,000 Variable 2013
 I&M Notes Payable   6,083 5.44 2013
 I&M Notes Payable   9,811 4.00 2014
 I&M Notes Payable   12,071 Variable 2015
 I&M Notes Payable   14,945 Variable 2016
 I&M Notes Payable   10,350 2.12 2016
 I&M Notes Payable   31,289 Variable 2016
 I&M Notes Payable   8,204 Variable 2017
 I&M Other Long-term Debt   705 6.00 2025
 I&M Other Long-term Debt   4,086 Variable 2015
 I&M Pollution Control Bonds   40,000 5.25 2025
 OPCo Other Long-term Debt   200,000(b)Variable 2015
 OPCo Pollution Control Bonds   56,000 5.10 2013
 OPCo Pollution Control Bonds   50,000 5.15 2026
 OPCo Pollution Control Bonds   65,000 4.90 2037
 OPCo Senior Unsecured Notes   250,000 5.50 2013
 OPCo Senior Unsecured Notes   250,000 5.50 2013
 OPCo Senior Unsecured Notes   250,000 5.75 2013
 OPCo Senior Unsecured Notes   225,000 6.38 2033
 PSO Notes Payable   301 3.00 2027
 SWEPCo Notes Payable   3,250 4.58 2032

(b)       Intercompany issuance from AEP consisting of a draw on a $1 billion term credit facility that was terminated in July 2013.

 
Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits
               Net   
               Loans to   
   Maximum Maximum Average Average (Borrowings from) Authorized
   Borrowings Loans  Borrowings Loans  the Utility Short-term
   from the Utility to the Utility from the Utility to the Utility Money Pool as of Borrowing
 Company Money Pool Money Pool Money Pool Money Pool September 30, 2013 Limit
   (in thousands)
 APCo $ 331,771 $ 39,372 $ 126,391 $ 23,632 $ (253,352) $ 600,000
 I&M   23,135   384,435   8,308   239,647   322,476   500,000
 OPCo   410,456   415,605   228,719   59,047   9,401   600,000
 PSO   46,806   52,734   18,658   18,808   19,442   300,000
 SWEPCo   15,386   153,830   4,154   38,449   18,634   350,000
Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool
   Nine Months Ended September 30,
   2013 2012
 Maximum Interest Rate  0.43%  0.56%
 Minimum Interest Rate  0.28%  0.44%
Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool
   Average Interest Rate  Average Interest Rate
   for Funds Borrowed   for Funds Loaned
   from the Utility Money Pool for   to the Utility Money Pool for
   Nine Months Ended September 30, Nine Months Ended September 30,
 Company 2013 20122013 2012
 APCo  0.33%  0.48%  0.34%  0.48%
 I&M  0.36%  -%  0.33%  0.47%
 OPCo  0.34%  0.47%  0.32%  0.50%
 PSO  0.34%  -%  0.32%  0.47%
 SWEPCo  0.33%  0.53%  0.36%  0.47%
Accounts Receivable and Accrued Unbilled Revenues
    September 30, December 31,
 Company 2013 2012
    (in thousands)
 APCo $ 135,579 $ 153,719
 I&M   143,804   123,447
 OPCo   321,054   300,675
 PSO   147,586   85,530
 SWEPCo   180,922   132,449
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
    Three Months Ended September 30, Nine Months Ended September 30,
 Company 2013 2012 2013 2012
    (in thousands)
 APCo $ 1,575 $ 1,703 $ 4,590 $ 5,389
 I&M   1,762   1,674   4,744   4,738
 OPCo   5,076   5,362   14,440   15,900
 PSO   1,549   1,990   4,314   5,547
 SWEPCo   1,649   1,786   4,413   4,720
Proceeds on Sale of Receivables to AEP Credit
    Three Months Ended September 30, Nine Months Ended September 30,
 Company 2013 2012 2013 2012
    (in thousands)
 APCo $ 340,438 $ 351,570 $ 1,081,615 $ 993,975
 I&M   384,316   358,936   1,097,563   1,018,933
 OPCo   658,829   790,115   2,017,746   2,284,749
 PSO   382,167   342,819   944,062   919,343
 SWEPCo   450,294   444,461   1,171,306   1,145,182
Ohio Power Co [Member]
  
Long-term Debt Issuances
     Principal  Interest  
 Company Type of Debt Amount (a) Rate Due Date
 Issuances:   (in thousands) (%)  
 APCo Pollution Control Bonds $ 30,000 3.25 2018
 APCo Pollution Control Bonds   40,000 3.25 2018
 I&M Notes Payable   101,354 Variable 2017
 I&M Senior Unsecured Notes   250,000 3.20 2023
 OPCo Other Long-term Debt   200,000(b)Variable 2015
 OPCo Other Long-term Debt   600,000(c)Variable 2015
 OPCo Pollution Control Bonds   50,000 Variable 2014
 OPCo Pollution Control Bonds   65,000 Variable 2014
 OPCo Securitization Bonds   164,900 0.96 2018
 OPCo Securitization Bonds   102,508 2.05 2020

(a)       Amounts indicated on the statements of cash flows are net of issuance costs and premium or discount and will not tie to the issuance amounts.

(b)       Intercompany issuance from AEP consisting of a draw on a $1 billion term credit facility that was terminated in July 2013.

(c)       Draw on a $1 billion term credit facility due in May 2015.

 
Retirements and Principal Payments
      Principal  Interest  
 Company Type of Debt Amount Paid Rate Due Date
 Retirements and   (in thousands) (%)  
  Principal Payments:         
 APCo Land Note $ 21 13.718 2026
 APCo Pollution Control Bonds   30,000 4.85 2013
 APCo Pollution Control Bonds   40,000 4.85 2013
 APCo Senior Unsecured Notes   275,000 Variable 2013
 I&M Notes Payable   6,083 5.44 2013
 I&M Notes Payable   9,811 4.00 2014
 I&M Notes Payable   12,071 Variable 2015
 I&M Notes Payable   14,945 Variable 2016
 I&M Notes Payable   10,350 2.12 2016
 I&M Notes Payable   31,289 Variable 2016
 I&M Notes Payable   8,204 Variable 2017
 I&M Other Long-term Debt   705 6.00 2025
 I&M Other Long-term Debt   4,086 Variable 2015
 I&M Pollution Control Bonds   40,000 5.25 2025
 OPCo Other Long-term Debt   200,000(b)Variable 2015
 OPCo Pollution Control Bonds   56,000 5.10 2013
 OPCo Pollution Control Bonds   50,000 5.15 2026
 OPCo Pollution Control Bonds   65,000 4.90 2037
 OPCo Senior Unsecured Notes   250,000 5.50 2013
 OPCo Senior Unsecured Notes   250,000 5.50 2013
 OPCo Senior Unsecured Notes   250,000 5.75 2013
 OPCo Senior Unsecured Notes   225,000 6.38 2033
 PSO Notes Payable   301 3.00 2027
 SWEPCo Notes Payable   3,250 4.58 2032

(b)       Intercompany issuance from AEP consisting of a draw on a $1 billion term credit facility that was terminated in July 2013.

 
Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits
               Net   
               Loans to   
   Maximum Maximum Average Average (Borrowings from) Authorized
   Borrowings Loans  Borrowings Loans  the Utility Short-term
   from the Utility to the Utility from the Utility to the Utility Money Pool as of Borrowing
 Company Money Pool Money Pool Money Pool Money Pool September 30, 2013 Limit
   (in thousands)
 APCo $ 331,771 $ 39,372 $ 126,391 $ 23,632 $ (253,352) $ 600,000
 I&M   23,135   384,435   8,308   239,647   322,476   500,000
 OPCo   410,456   415,605   228,719   59,047   9,401   600,000
 PSO   46,806   52,734   18,658   18,808   19,442   300,000
 SWEPCo   15,386   153,830   4,154   38,449   18,634   350,000
Nonutility Money Pool Activity
             
 Maximum Maximum Average Average Borrowings 
 Borrowings Loans  Borrowings Loans  from the Nonutility 
 from the Nonutility to the Nonutility from the Nonutility to the Nonutility Money Pool as of 
 Money Pool Money Pool Money Pool Money Pool September 30, 2013 
 (in thousands)
 $ 1,047 $ 1,027 $ 201 $ 208 $ 338 
Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool
   Nine Months Ended September 30,
   2013 2012
 Maximum Interest Rate  0.43%  0.56%
 Minimum Interest Rate  0.28%  0.44%
Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool
   Average Interest Rate  Average Interest Rate
   for Funds Borrowed   for Funds Loaned
   from the Utility Money Pool for   to the Utility Money Pool for
   Nine Months Ended September 30, Nine Months Ended September 30,
 Company 2013 20122013 2012
 APCo  0.33%  0.48%  0.34%  0.48%
 I&M  0.36%  -%  0.33%  0.47%
 OPCo  0.34%  0.47%  0.32%  0.50%
 PSO  0.34%  -%  0.32%  0.47%
 SWEPCo  0.33%  0.53%  0.36%  0.47%
Maximum, Minimum and Average Interest Rates for Funds Borrowed from and Loaned to the Nonutility Money Pool
  Maximum Minimum Maximum Minimum Average Average
  Interest Rate Interest Rate Interest Rate Interest Rate Interest Rate Interest Rate
  for Funds for Funds for Funds for Funds for Funds for Funds
Nine Months Borrowed from Borrowed from Loaned to Loaned to Borrowed from Loaned to
Ended the Nonutility the Nonutility the Nonutility the Nonutility the Nonutility the Nonutility
September 30, Money Pool Money PoolMoney Pool Money Pool Money Pool Money Pool
2013  0.61%  0.53%  0.35%  0.32%  0.56%  0.34%
Accounts Receivable and Accrued Unbilled Revenues
    September 30, December 31,
 Company 2013 2012
    (in thousands)
 APCo $ 135,579 $ 153,719
 I&M   143,804   123,447
 OPCo   321,054   300,675
 PSO   147,586   85,530
 SWEPCo   180,922   132,449
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
    Three Months Ended September 30, Nine Months Ended September 30,
 Company 2013 2012 2013 2012
    (in thousands)
 APCo $ 1,575 $ 1,703 $ 4,590 $ 5,389
 I&M   1,762   1,674   4,744   4,738
 OPCo   5,076   5,362   14,440   15,900
 PSO   1,549   1,990   4,314   5,547
 SWEPCo   1,649   1,786   4,413   4,720
Proceeds on Sale of Receivables to AEP Credit
    Three Months Ended September 30, Nine Months Ended September 30,
 Company 2013 2012 2013 2012
    (in thousands)
 APCo $ 340,438 $ 351,570 $ 1,081,615 $ 993,975
 I&M   384,316   358,936   1,097,563   1,018,933
 OPCo   658,829   790,115   2,017,746   2,284,749
 PSO   382,167   342,819   944,062   919,343
 SWEPCo   450,294   444,461   1,171,306   1,145,182
Public Service Co Of Oklahoma [Member]
  
Retirements and Principal Payments
      Principal  Interest  
 Company Type of Debt Amount Paid Rate Due Date
 Retirements and   (in thousands) (%)  
  Principal Payments:         
 APCo Land Note $ 21 13.718 2026
 APCo Pollution Control Bonds   30,000 4.85 2013
 APCo Pollution Control Bonds   40,000 4.85 2013
 APCo Senior Unsecured Notes   275,000 Variable 2013
 I&M Notes Payable   6,083 5.44 2013
 I&M Notes Payable   9,811 4.00 2014
 I&M Notes Payable   12,071 Variable 2015
 I&M Notes Payable   14,945 Variable 2016
 I&M Notes Payable   10,350 2.12 2016
 I&M Notes Payable   31,289 Variable 2016
 I&M Notes Payable   8,204 Variable 2017
 I&M Other Long-term Debt   705 6.00 2025
 I&M Other Long-term Debt   4,086 Variable 2015
 I&M Pollution Control Bonds   40,000 5.25 2025
 OPCo Other Long-term Debt   200,000(b)Variable 2015
 OPCo Pollution Control Bonds   56,000 5.10 2013
 OPCo Pollution Control Bonds   50,000 5.15 2026
 OPCo Pollution Control Bonds   65,000 4.90 2037
 OPCo Senior Unsecured Notes   250,000 5.50 2013
 OPCo Senior Unsecured Notes   250,000 5.50 2013
 OPCo Senior Unsecured Notes   250,000 5.75 2013
 OPCo Senior Unsecured Notes   225,000 6.38 2033
 PSO Notes Payable   301 3.00 2027
 SWEPCo Notes Payable   3,250 4.58 2032

(b)       Intercompany issuance from AEP consisting of a draw on a $1 billion term credit facility that was terminated in July 2013.

 
Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits
               Net   
               Loans to   
   Maximum Maximum Average Average (Borrowings from) Authorized
   Borrowings Loans  Borrowings Loans  the Utility Short-term
   from the Utility to the Utility from the Utility to the Utility Money Pool as of Borrowing
 Company Money Pool Money Pool Money Pool Money Pool September 30, 2013 Limit
   (in thousands)
 APCo $ 331,771 $ 39,372 $ 126,391 $ 23,632 $ (253,352) $ 600,000
 I&M   23,135   384,435   8,308   239,647   322,476   500,000
 OPCo   410,456   415,605   228,719   59,047   9,401   600,000
 PSO   46,806   52,734   18,658   18,808   19,442   300,000
 SWEPCo   15,386   153,830   4,154   38,449   18,634   350,000
Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool
   Nine Months Ended September 30,
   2013 2012
 Maximum Interest Rate  0.43%  0.56%
 Minimum Interest Rate  0.28%  0.44%
Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool
   Average Interest Rate  Average Interest Rate
   for Funds Borrowed   for Funds Loaned
   from the Utility Money Pool for   to the Utility Money Pool for
   Nine Months Ended September 30, Nine Months Ended September 30,
 Company 2013 20122013 2012
 APCo  0.33%  0.48%  0.34%  0.48%
 I&M  0.36%  -%  0.33%  0.47%
 OPCo  0.34%  0.47%  0.32%  0.50%
 PSO  0.34%  -%  0.32%  0.47%
 SWEPCo  0.33%  0.53%  0.36%  0.47%
Accounts Receivable and Accrued Unbilled Revenues
    September 30, December 31,
 Company 2013 2012
    (in thousands)
 APCo $ 135,579 $ 153,719
 I&M   143,804   123,447
 OPCo   321,054   300,675
 PSO   147,586   85,530
 SWEPCo   180,922   132,449
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
    Three Months Ended September 30, Nine Months Ended September 30,
 Company 2013 2012 2013 2012
    (in thousands)
 APCo $ 1,575 $ 1,703 $ 4,590 $ 5,389
 I&M   1,762   1,674   4,744   4,738
 OPCo   5,076   5,362   14,440   15,900
 PSO   1,549   1,990   4,314   5,547
 SWEPCo   1,649   1,786   4,413   4,720
Proceeds on Sale of Receivables to AEP Credit
    Three Months Ended September 30, Nine Months Ended September 30,
 Company 2013 2012 2013 2012
    (in thousands)
 APCo $ 340,438 $ 351,570 $ 1,081,615 $ 993,975
 I&M   384,316   358,936   1,097,563   1,018,933
 OPCo   658,829   790,115   2,017,746   2,284,749
 PSO   382,167   342,819   944,062   919,343
 SWEPCo   450,294   444,461   1,171,306   1,145,182
Southwestern Electric Power Co [Member]
  
Retirements and Principal Payments
      Principal  Interest  
 Company Type of Debt Amount Paid Rate Due Date
 Retirements and   (in thousands) (%)  
  Principal Payments:         
 APCo Land Note $ 21 13.718 2026
 APCo Pollution Control Bonds   30,000 4.85 2013
 APCo Pollution Control Bonds   40,000 4.85 2013
 APCo Senior Unsecured Notes   275,000 Variable 2013
 I&M Notes Payable   6,083 5.44 2013
 I&M Notes Payable   9,811 4.00 2014
 I&M Notes Payable   12,071 Variable 2015
 I&M Notes Payable   14,945 Variable 2016
 I&M Notes Payable   10,350 2.12 2016
 I&M Notes Payable   31,289 Variable 2016
 I&M Notes Payable   8,204 Variable 2017
 I&M Other Long-term Debt   705 6.00 2025
 I&M Other Long-term Debt   4,086 Variable 2015
 I&M Pollution Control Bonds   40,000 5.25 2025
 OPCo Other Long-term Debt   200,000(b)Variable 2015
 OPCo Pollution Control Bonds   56,000 5.10 2013
 OPCo Pollution Control Bonds   50,000 5.15 2026
 OPCo Pollution Control Bonds   65,000 4.90 2037
 OPCo Senior Unsecured Notes   250,000 5.50 2013
 OPCo Senior Unsecured Notes   250,000 5.50 2013
 OPCo Senior Unsecured Notes   250,000 5.75 2013
 OPCo Senior Unsecured Notes   225,000 6.38 2033
 PSO Notes Payable   301 3.00 2027
 SWEPCo Notes Payable   3,250 4.58 2032

(b)       Intercompany issuance from AEP consisting of a draw on a $1 billion term credit facility that was terminated in July 2013.

 
Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits
               Net   
               Loans to   
   Maximum Maximum Average Average (Borrowings from) Authorized
   Borrowings Loans  Borrowings Loans  the Utility Short-term
   from the Utility to the Utility from the Utility to the Utility Money Pool as of Borrowing
 Company Money Pool Money Pool Money Pool Money Pool September 30, 2013 Limit
   (in thousands)
 APCo $ 331,771 $ 39,372 $ 126,391 $ 23,632 $ (253,352) $ 600,000
 I&M   23,135   384,435   8,308   239,647   322,476   500,000
 OPCo   410,456   415,605   228,719   59,047   9,401   600,000
 PSO   46,806   52,734   18,658   18,808   19,442   300,000
 SWEPCo   15,386   153,830   4,154   38,449   18,634   350,000
Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool
   Nine Months Ended September 30,
   2013 2012
 Maximum Interest Rate  0.43%  0.56%
 Minimum Interest Rate  0.28%  0.44%
Average Interest Rates for Funds Borrowed from and Loaned to Utility Money Pool
   Average Interest Rate  Average Interest Rate
   for Funds Borrowed   for Funds Loaned
   from the Utility Money Pool for   to the Utility Money Pool for
   Nine Months Ended September 30, Nine Months Ended September 30,
 Company 2013 20122013 2012
 APCo  0.33%  0.48%  0.34%  0.48%
 I&M  0.36%  -%  0.33%  0.47%
 OPCo  0.34%  0.47%  0.32%  0.50%
 PSO  0.34%  -%  0.32%  0.47%
 SWEPCo  0.33%  0.53%  0.36%  0.47%
Short Term Debt
      September 30, 2013 December 31, 2012
      Outstanding Interest Outstanding Interest
 Company Type of DebtAmountRate (a) AmountRate (a)
      (in thousands)    (in thousands)   
 SWEPCo Line of Credit – Sabine $ -  -% $ 2,603  1.82%

(a) Weighted average rate.

 
Accounts Receivable and Accrued Unbilled Revenues
    September 30, December 31,
 Company 2013 2012
    (in thousands)
 APCo $ 135,579 $ 153,719
 I&M   143,804   123,447
 OPCo   321,054   300,675
 PSO   147,586   85,530
 SWEPCo   180,922   132,449
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
    Three Months Ended September 30, Nine Months Ended September 30,
 Company 2013 2012 2013 2012
    (in thousands)
 APCo $ 1,575 $ 1,703 $ 4,590 $ 5,389
 I&M   1,762   1,674   4,744   4,738
 OPCo   5,076   5,362   14,440   15,900
 PSO   1,549   1,990   4,314   5,547
 SWEPCo   1,649   1,786   4,413   4,720
Proceeds on Sale of Receivables to AEP Credit
    Three Months Ended September 30, Nine Months Ended September 30,
 Company 2013 2012 2013 2012
    (in thousands)
 APCo $ 340,438 $ 351,570 $ 1,081,615 $ 993,975
 I&M   384,316   358,936   1,097,563   1,018,933
 OPCo   658,829   790,115   2,017,746   2,284,749
 PSO   382,167   342,819   944,062   919,343
 SWEPCo   450,294   444,461   1,171,306   1,145,182