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Financing Activities (Tables)
 6 Months Ended
Jun. 30, 2012
Long-term Debt
Long-term Debt      
        
 Type of Debt June 30, 2012 December 31, 2011
   (in millions)
 Senior Unsecured Notes $ 11,858 $ 11,737
 Pollution Control Bonds   1,958   2,112
 Notes Payable   497   402
 Securitization Bonds   2,389   1,688
 Junior Subordinated Debentures   315   315
 Spent Nuclear Fuel Obligation (a)   265   265
 Other Long-term Debt    51   29
 Fair Value of Interest Rate Hedges   6   7
 Unamortized Discount, Net   (37)   (39)
 Total Long-term Debt Outstanding   17,302   16,516
 Long-term Debt Due Within One Year   1,983   1,433
 Long-term Debt  $ 15,319 $ 15,083

(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 $308 million at both June 30, 2012 and December 31, 2011 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) (%)  
 I&M Notes Payable $ 110  Variable 2016
 I&M Other Long-term Debt   20(a) Variable 2015
 PSO Notes Payable   2  3.00 2027
 SWEPCo Senior Unsecured Notes   275  3.55 2022
 SWEPCo Notes Payable   65  4.58 2032
             
 Non-Registrant:          
 TCC Securitization Bonds   312  2.845 2024
 TCC Securitization Bonds   308  0.88 2017
 TCC Securitization Bonds   180  1.976 2020
 Total Issuances   $ 1,272(b)    

(a)       Consists of a $110 million three-year credit facility to be used for general corporate purposes.

(b)       Amount indicated on the statement of cash flows of $1,261 million is net of issuance costs and premium or discount.
Retirements and Principal Payments
      Principal   Interest  
 Company Type of Debt Amount Paid  Rate Due Date
 Retirements and   (in millions) (%)  
  Principal Payments:          
 APCo Pollution Control Bonds $ 30  6.05 2024
 APCo Pollution Control Bonds   20  5.00 2021
 I&M Notes Payable   14  5.44 2013
 I&M Notes Payable   11  4.00 2014
 I&M Notes Payable   11  Variable 2015
 I&M Notes Payable   12  Variable 2016
 I&M Notes Payable   8  2.12 2016
 OPCo Pollution Control Bonds   45  4.85 2012
 OPCo Senior Unsecured Notes   150  Variable 2012
 SWEPCo Notes Payable   20  7.03 2012
             
 Non-Registrant:          
 AEP Subsidiaries Notes Payable   4  Variable 2017
 AEP Subsidiaries Notes Payable   1  7.59-8.03 2026
 AEGCo Senior Unsecured Notes   3  6.33 2037
 TCC Securitization Bonds   63  4.98 2013
 TCC Securitization Bonds   35  5.96 2013
 TCC Pollution Control Bonds   60  1.125 2012
 Total Retirements and          
  Principal Payments   $ 487     
Short Term Debt
Short-term Debt            
               
Our outstanding short-term debt was as follows:           
               
    June 30, 2012 December 31, 2011
    Outstanding Interest Outstanding Interest
 Type of DebtAmountRate (a) AmountRate (a)
   (in millions)    (in millions)   
 Securitized Debt for Receivables (b) $ 658  0.27% $ 666  0.27%
 Commercial Paper   550  0.46%   967  0.51%
 Line of Credit – Sabine (c)   -  -%   17  1.79%
 Total Short-term Debt $ 1,208    $ 1,650   

(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  Six Months Ended  
    June 30, June 30, 
    2012 2011 2012 2011 
   (dollars in millions) 
 Effective Interest Rates on Securitization of             
  Accounts Receivable   0.26%  0.26%  0.26%  0.28%
 Net Uncollectible Accounts Receivable             
  Written Off $ 6 $ 6 $ 14 $ 17 
Customer Accounts Receivable Managed Portfolio
    June 30, December 31,
    2012 2011
    (in millions)
 Accounts Receivable Retained Interest and Pledged as Collateral      
  Less Uncollectible Accounts $ 888 $ 902
 Total Principal Outstanding   658   666
 Delinquent Securitized Accounts Receivable   35   38
 Bad Debt Reserves Related to Securitization/Sale of Accounts Receivable   21   18
 Unbilled Receivables Related to Securitization/Sale of Accounts Receivable   355   370
Appalachian 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 Pollution Control Bonds $ 30,000 6.05 2024
 APCo Pollution Control Bonds   19,500 5.00 2021
 APCo Land Note   12 13.718 2026
 I&M Notes Payable   13,860 5.44 2013
 I&M Notes Payable   10,590 4.00 2014
 I&M Notes Payable   11,038 Variable 2015
 I&M Notes Payable   11,971 Variable 2016
 I&M Notes Payable   8,291 2.12 2016
 I&M Other Long-term Debt   245 6.00 2025
 OPCo Pollution Control Bonds   44,500 4.85 2012
 OPCo Senior Unsecured Notes   150,000 Variable 2012
 PSO Notes Payable   32 3.00 2027
 SWEPCo Notes Payable   20,000 7.03 2012
Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits
               Net   
               Loans    
   Maximum Maximum Average Average (Borrowings) Authorized
   Borrowings Loans  Borrowings Loans  to/from Utility Short-term
   from Utility to Utility from Utility to Utility Money Pool as of Borrowing
 Company Money Pool Money Pool Money Pool Money Pool June 30, 2012 Limit
   (in thousands)
 APCo $ 275,241 $ 22,979 $ 193,156 $ 22,570 $ (144,415) $ 600,000
 I&M   -   246,882   -   163,557   238,466   500,000
 OPCo   126,975   290,356   50,680   97,642   32,671   600,000
 PSO   -   120,424   -   66,085   120,424   300,000
 SWEPCo   227,087   97,022   147,338   46,496   97,022   350,000
Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool
   Six Months Ended June 30,
   2012 2011
 Maximum Interest Rate  0.56%  0.56%
 Minimum Interest Rate  0.45%  0.06%
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 Utility Money Pool for   to Utility Money Pool for
   Six Months Ended June 30, Six Months Ended June 30,
 Company 2012 20112012 2011
              
 APCo  0.49%  0.38%  0.49%  0.27%
 I&M  -%  0.44%  0.49%  0.23%
 OPCo  0.47%  0.45%  0.51%  0.25%
 PSO  -%  0.41%  0.48%  0.19%
 SWEPCo  0.53%  0.25%  0.48%  0.33%
Accounts Receivable and Accrued Unbilled Revenues
    June 30, December 31,
 Company 2012 2011
    (in thousands)
 APCo $ 125,942 $ 121,605
 I&M   126,865   121,597
 OPCo   319,996   346,695
 PSO   122,215   123,172
 SWEPCo   158,924   140,440
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
    Three Months Ended June 30, Six Months Ended June 30,
 Company 2012 2011 2012 2011
    (in thousands)
 APCo $ 1,556 $ 2,239 $ 3,686 $ 4,814
 I&M   1,521   1,508   3,064   3,135
 OPCo   4,622   4,405   10,538   8,440
 PSO   1,825   1,483   3,557   2,717
 SWEPCo   1,548   1,303   2,934   2,403
Proceeds on Sale of Receivables to AEP Credit
    Three Months Ended June 30, Six Months Ended June 30,
 Company 2012 2011 2012 2011
    (in thousands)
 APCo $ 295,879 $ 284,715 $ 642,405 $ 650,924
 I&M   320,415   315,551   659,996   666,572
 OPCo   656,737   831,835   1,494,634   1,742,873
 PSO   303,729   317,060   576,524   585,629
 SWEPCo   379,114   375,903   700,722   690,027
Indiana Michigan Power Co [Member]
  
Long-term Debt Issuances
     Principal  Interest  
 Company Type of Debt Amount Rate Due Date
 Issuances:   (in thousands) (%)  
 I&M Notes Payable $ 109,500 Variable 2016
 I&M Other Long-term Debt   20,000(a)Variable 2015
 PSO Notes Payable   2,395 3.00 2027
 SWEPCo Senior Unsecured Notes   275,000 3.55 2022
 SWEPCo Notes Payable   65,000 4.58 2032
           
 (a) Consists of a $110 million three-year credit facility to be used for general corporate purposes.
Retirements and Principal Payments
      Principal  Interest  
 Company Type of Debt Amount Paid Rate Due Date
 Retirements and   (in thousands) (%)  
  Principal Payments:         
 APCo Pollution Control Bonds $ 30,000 6.05 2024
 APCo Pollution Control Bonds   19,500 5.00 2021
 APCo Land Note   12 13.718 2026
 I&M Notes Payable   13,860 5.44 2013
 I&M Notes Payable   10,590 4.00 2014
 I&M Notes Payable   11,038 Variable 2015
 I&M Notes Payable   11,971 Variable 2016
 I&M Notes Payable   8,291 2.12 2016
 I&M Other Long-term Debt   245 6.00 2025
 OPCo Pollution Control Bonds   44,500 4.85 2012
 OPCo Senior Unsecured Notes   150,000 Variable 2012
 PSO Notes Payable   32 3.00 2027
 SWEPCo Notes Payable   20,000 7.03 2012
Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits
               Net   
               Loans    
   Maximum Maximum Average Average (Borrowings) Authorized
   Borrowings Loans  Borrowings Loans  to/from Utility Short-term
   from Utility to Utility from Utility to Utility Money Pool as of Borrowing
 Company Money Pool Money Pool Money Pool Money Pool June 30, 2012 Limit
   (in thousands)
 APCo $ 275,241 $ 22,979 $ 193,156 $ 22,570 $ (144,415) $ 600,000
 I&M   -   246,882   -   163,557   238,466   500,000
 OPCo   126,975   290,356   50,680   97,642   32,671   600,000
 PSO   -   120,424   -   66,085   120,424   300,000
 SWEPCo   227,087   97,022   147,338   46,496   97,022   350,000
Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool
   Six Months Ended June 30,
   2012 2011
 Maximum Interest Rate  0.56%  0.56%
 Minimum Interest Rate  0.45%  0.06%
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 Utility Money Pool for   to Utility Money Pool for
   Six Months Ended June 30, Six Months Ended June 30,
 Company 2012 20112012 2011
              
 APCo  0.49%  0.38%  0.49%  0.27%
 I&M  -%  0.44%  0.49%  0.23%
 OPCo  0.47%  0.45%  0.51%  0.25%
 PSO  -%  0.41%  0.48%  0.19%
 SWEPCo  0.53%  0.25%  0.48%  0.33%
Accounts Receivable and Accrued Unbilled Revenues
    June 30, December 31,
 Company 2012 2011
    (in thousands)
 APCo $ 125,942 $ 121,605
 I&M   126,865   121,597
 OPCo   319,996   346,695
 PSO   122,215   123,172
 SWEPCo   158,924   140,440
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
    Three Months Ended June 30, Six Months Ended June 30,
 Company 2012 2011 2012 2011
    (in thousands)
 APCo $ 1,556 $ 2,239 $ 3,686 $ 4,814
 I&M   1,521   1,508   3,064   3,135
 OPCo   4,622   4,405   10,538   8,440
 PSO   1,825   1,483   3,557   2,717
 SWEPCo   1,548   1,303   2,934   2,403
Proceeds on Sale of Receivables to AEP Credit
    Three Months Ended June 30, Six Months Ended June 30,
 Company 2012 2011 2012 2011
    (in thousands)
 APCo $ 295,879 $ 284,715 $ 642,405 $ 650,924
 I&M   320,415   315,551   659,996   666,572
 OPCo   656,737   831,835   1,494,634   1,742,873
 PSO   303,729   317,060   576,524   585,629
 SWEPCo   379,114   375,903   700,722   690,027
Ohio 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 Pollution Control Bonds $ 30,000 6.05 2024
 APCo Pollution Control Bonds   19,500 5.00 2021
 APCo Land Note   12 13.718 2026
 I&M Notes Payable   13,860 5.44 2013
 I&M Notes Payable   10,590 4.00 2014
 I&M Notes Payable   11,038 Variable 2015
 I&M Notes Payable   11,971 Variable 2016
 I&M Notes Payable   8,291 2.12 2016
 I&M Other Long-term Debt   245 6.00 2025
 OPCo Pollution Control Bonds   44,500 4.85 2012
 OPCo Senior Unsecured Notes   150,000 Variable 2012
 PSO Notes Payable   32 3.00 2027
 SWEPCo Notes Payable   20,000 7.03 2012
Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits
               Net   
               Loans    
   Maximum Maximum Average Average (Borrowings) Authorized
   Borrowings Loans  Borrowings Loans  to/from Utility Short-term
   from Utility to Utility from Utility to Utility Money Pool as of Borrowing
 Company Money Pool Money Pool Money Pool Money Pool June 30, 2012 Limit
   (in thousands)
 APCo $ 275,241 $ 22,979 $ 193,156 $ 22,570 $ (144,415) $ 600,000
 I&M   -   246,882   -   163,557   238,466   500,000
 OPCo   126,975   290,356   50,680   97,642   32,671   600,000
 PSO   -   120,424   -   66,085   120,424   300,000
 SWEPCo   227,087   97,022   147,338   46,496   97,022   350,000
Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool
   Six Months Ended June 30,
   2012 2011
 Maximum Interest Rate  0.56%  0.56%
 Minimum Interest Rate  0.45%  0.06%
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 Utility Money Pool for   to Utility Money Pool for
   Six Months Ended June 30, Six Months Ended June 30,
 Company 2012 20112012 2011
              
 APCo  0.49%  0.38%  0.49%  0.27%
 I&M  -%  0.44%  0.49%  0.23%
 OPCo  0.47%  0.45%  0.51%  0.25%
 PSO  -%  0.41%  0.48%  0.19%
 SWEPCo  0.53%  0.25%  0.48%  0.33%
Accounts Receivable and Accrued Unbilled Revenues
    June 30, December 31,
 Company 2012 2011
    (in thousands)
 APCo $ 125,942 $ 121,605
 I&M   126,865   121,597
 OPCo   319,996   346,695
 PSO   122,215   123,172
 SWEPCo   158,924   140,440
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
    Three Months Ended June 30, Six Months Ended June 30,
 Company 2012 2011 2012 2011
    (in thousands)
 APCo $ 1,556 $ 2,239 $ 3,686 $ 4,814
 I&M   1,521   1,508   3,064   3,135
 OPCo   4,622   4,405   10,538   8,440
 PSO   1,825   1,483   3,557   2,717
 SWEPCo   1,548   1,303   2,934   2,403
Proceeds on Sale of Receivables to AEP Credit
    Three Months Ended June 30, Six Months Ended June 30,
 Company 2012 2011 2012 2011
    (in thousands)
 APCo $ 295,879 $ 284,715 $ 642,405 $ 650,924
 I&M   320,415   315,551   659,996   666,572
 OPCo   656,737   831,835   1,494,634   1,742,873
 PSO   303,729   317,060   576,524   585,629
 SWEPCo   379,114   375,903   700,722   690,027
Public Service Co Of Oklahoma [Member]
  
Long-term Debt Issuances
     Principal  Interest  
 Company Type of Debt Amount Rate Due Date
 Issuances:   (in thousands) (%)  
 I&M Notes Payable $ 109,500 Variable 2016
 I&M Other Long-term Debt   20,000(a)Variable 2015
 PSO Notes Payable   2,395 3.00 2027
 SWEPCo Senior Unsecured Notes   275,000 3.55 2022
 SWEPCo Notes Payable   65,000 4.58 2032
           
 (a) Consists of a $110 million three-year credit facility to be used for general corporate purposes.
Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits
               Net   
               Loans    
   Maximum Maximum Average Average (Borrowings) Authorized
   Borrowings Loans  Borrowings Loans  to/from Utility Short-term
   from Utility to Utility from Utility to Utility Money Pool as of Borrowing
 Company Money Pool Money Pool Money Pool Money Pool June 30, 2012 Limit
   (in thousands)
 APCo $ 275,241 $ 22,979 $ 193,156 $ 22,570 $ (144,415) $ 600,000
 I&M   -   246,882   -   163,557   238,466   500,000
 OPCo   126,975   290,356   50,680   97,642   32,671   600,000
 PSO   -   120,424   -   66,085   120,424   300,000
 SWEPCo   227,087   97,022   147,338   46,496   97,022   350,000
Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool
   Six Months Ended June 30,
   2012 2011
 Maximum Interest Rate  0.56%  0.56%
 Minimum Interest Rate  0.45%  0.06%
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 Utility Money Pool for   to Utility Money Pool for
   Six Months Ended June 30, Six Months Ended June 30,
 Company 2012 20112012 2011
              
 APCo  0.49%  0.38%  0.49%  0.27%
 I&M  -%  0.44%  0.49%  0.23%
 OPCo  0.47%  0.45%  0.51%  0.25%
 PSO  -%  0.41%  0.48%  0.19%
 SWEPCo  0.53%  0.25%  0.48%  0.33%
Accounts Receivable and Accrued Unbilled Revenues
    June 30, December 31,
 Company 2012 2011
    (in thousands)
 APCo $ 125,942 $ 121,605
 I&M   126,865   121,597
 OPCo   319,996   346,695
 PSO   122,215   123,172
 SWEPCo   158,924   140,440
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
    Three Months Ended June 30, Six Months Ended June 30,
 Company 2012 2011 2012 2011
    (in thousands)
 APCo $ 1,556 $ 2,239 $ 3,686 $ 4,814
 I&M   1,521   1,508   3,064   3,135
 OPCo   4,622   4,405   10,538   8,440
 PSO   1,825   1,483   3,557   2,717
 SWEPCo   1,548   1,303   2,934   2,403
Proceeds on Sale of Receivables to AEP Credit
    Three Months Ended June 30, Six Months Ended June 30,
 Company 2012 2011 2012 2011
    (in thousands)
 APCo $ 295,879 $ 284,715 $ 642,405 $ 650,924
 I&M   320,415   315,551   659,996   666,572
 OPCo   656,737   831,835   1,494,634   1,742,873
 PSO   303,729   317,060   576,524   585,629
 SWEPCo   379,114   375,903   700,722   690,027
Southwestern Electric Power Co [Member]
  
Long-term Debt Issuances
     Principal  Interest  
 Company Type of Debt Amount Rate Due Date
 Issuances:   (in thousands) (%)  
 I&M Notes Payable $ 109,500 Variable 2016
 I&M Other Long-term Debt   20,000(a)Variable 2015
 PSO Notes Payable   2,395 3.00 2027
 SWEPCo Senior Unsecured Notes   275,000 3.55 2022
 SWEPCo Notes Payable   65,000 4.58 2032
           
 (a) Consists of a $110 million three-year credit facility to be used for general corporate purposes.
Retirements and Principal Payments
      Principal  Interest  
 Company Type of Debt Amount Paid Rate Due Date
 Retirements and   (in thousands) (%)  
  Principal Payments:         
 APCo Pollution Control Bonds $ 30,000 6.05 2024
 APCo Pollution Control Bonds   19,500 5.00 2021
 APCo Land Note   12 13.718 2026
 I&M Notes Payable   13,860 5.44 2013
 I&M Notes Payable   10,590 4.00 2014
 I&M Notes Payable   11,038 Variable 2015
 I&M Notes Payable   11,971 Variable 2016
 I&M Notes Payable   8,291 2.12 2016
 I&M Other Long-term Debt   245 6.00 2025
 OPCo Pollution Control Bonds   44,500 4.85 2012
 OPCo Senior Unsecured Notes   150,000 Variable 2012
 PSO Notes Payable   32 3.00 2027
 SWEPCo Notes Payable   20,000 7.03 2012
Utility Money Pool Participants' Money Pool Activity and Authorized Borrowing Limits
               Net   
               Loans    
   Maximum Maximum Average Average (Borrowings) Authorized
   Borrowings Loans  Borrowings Loans  to/from Utility Short-term
   from Utility to Utility from Utility to Utility Money Pool as of Borrowing
 Company Money Pool Money Pool Money Pool Money Pool June 30, 2012 Limit
   (in thousands)
 APCo $ 275,241 $ 22,979 $ 193,156 $ 22,570 $ (144,415) $ 600,000
 I&M   -   246,882   -   163,557   238,466   500,000
 OPCo   126,975   290,356   50,680   97,642   32,671   600,000
 PSO   -   120,424   -   66,085   120,424   300,000
 SWEPCo   227,087   97,022   147,338   46,496   97,022   350,000
Maximum and Minimum Interest Rates for Funds Either Borrowed from or Loaned to Utility Money Pool
   Six Months Ended June 30,
   2012 2011
 Maximum Interest Rate  0.56%  0.56%
 Minimum Interest Rate  0.45%  0.06%
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 Utility Money Pool for   to Utility Money Pool for
   Six Months Ended June 30, Six Months Ended June 30,
 Company 2012 20112012 2011
              
 APCo  0.49%  0.38%  0.49%  0.27%
 I&M  -%  0.44%  0.49%  0.23%
 OPCo  0.47%  0.45%  0.51%  0.25%
 PSO  -%  0.41%  0.48%  0.19%
 SWEPCo  0.53%  0.25%  0.48%  0.33%
Short Term Debt
Short-term Debt            
                 
The Registrant Subsidiaries’ outstanding short-term debt was as follows:
                 
      June 30, 2012 December 31, 2011
      Outstanding Interest Outstanding Interest
 Company Type of DebtAmountRate (a) AmountRate (a)
      (in thousands)    (in thousands)   
 SWEPCo Line of Credit – Sabine $ -  -% $ 17,016  1.79%

(a) Weighted average weight.

 
Accounts Receivable and Accrued Unbilled Revenues
    June 30, December 31,
 Company 2012 2011
    (in thousands)
 APCo $ 125,942 $ 121,605
 I&M   126,865   121,597
 OPCo   319,996   346,695
 PSO   122,215   123,172
 SWEPCo   158,924   140,440
Fees Paid to AEP Credit for Customer Accounts Receivable Sold
    Three Months Ended June 30, Six Months Ended June 30,
 Company 2012 2011 2012 2011
    (in thousands)
 APCo $ 1,556 $ 2,239 $ 3,686 $ 4,814
 I&M   1,521   1,508   3,064   3,135
 OPCo   4,622   4,405   10,538   8,440
 PSO   1,825   1,483   3,557   2,717
 SWEPCo   1,548   1,303   2,934   2,403
Proceeds on Sale of Receivables to AEP Credit
    Three Months Ended June 30, Six Months Ended June 30,
 Company 2012 2011 2012 2011
    (in thousands)
 APCo $ 295,879 $ 284,715 $ 642,405 $ 650,924
 I&M   320,415   315,551   659,996   666,572
 OPCo   656,737   831,835   1,494,634   1,742,873
 PSO   303,729   317,060   576,524   585,629
 SWEPCo   379,114   375,903   700,722   690,027