XML 85 R43.htm IDEA: XBRL DOCUMENT v3.20.2
Acquisitions and Dispositions (Details)
1 Months Ended 3 Months Ended 6 Months Ended 7 Months Ended 9 Months Ended 13 Months Ended
Jun. 30, 2020
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Rate
MW
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Rate
Apr. 30, 2021
USD ($)
Sep. 30, 2019
USD ($)
Rate
MW
Jul. 31, 2022
USD ($)
Asset Retirement Obligation, Liabilities Settled [1],[2],[3],[4]       $ 129,900,000        
Conesville Generating Station [Member]                
Asset Retirement Obligation, Liabilities Settled       106,000,000        
AEP Wind Holdings LLC [Member]                
Acquisition     $ 134,800,000          
Generation And Marketing [Member] | Conesville Generating Station [Member]                
Payments for (Proceeds from) Removal Costs $ 26,000,000 $ 98,000,000            
Asset Retirement Obligation, Liabilities Settled   106,000,000            
Generation And Marketing [Member] | Conesville Generating Station [Member] | Forecast [Member]                
Payments for (Proceeds from) Removal Costs           $ 28,000,000   $ 44,000,000
Generation And Marketing [Member] | AEP Wind Holdings LLC [Member]                
Maximum Potential Amount of Future Payments Associated with Guarantee 166,000,000 166,000,000   166,000,000        
Guarantor Obligations, Current Carrying Value 32,000,000 32,000,000   32,000,000        
Percentage of an Asset Acquired | Rate     50.00%   50.00%      
Wind Generation MWs | MW     724          
Noncash or Part Noncash Acquisition, Value of Assets Acquired         $ 1,100,000,000      
Payments to Acquire Businesses, Gross         580,000,000      
Noncash or Part Noncash Acquisition, Debt Assumed         364,000,000      
Guarantor Obligations, Current Carrying Value, Contingent Portion $ 1,000,000 $ 1,000,000   1,000,000        
Generation And Marketing [Member] | Santa Rita East [Member]                
Percentage of an Asset Acquired | Rate             75.00%  
Wind Generation MWs | MW             227  
Payments to Acquire Businesses, Gross             $ 356,000,000  
Equity Method Investments [Member] | Generation And Marketing [Member] | AEP Wind Holdings LLC [Member]                
Acquisition         404,000,000      
Noncontrolling Interest [Member]                
Noncash or Part Noncash Acquisition, Other Assets Acquired       0 134,800,000      
Noncontrolling Interest [Member] | Generation And Marketing [Member] | AEP Wind Holdings LLC [Member]                
Noncash or Part Noncash Acquisition, Other Assets Acquired         $ 135,000,000      
AEP Texas Inc. [Member]                
Asset Retirement Obligation, Liabilities Settled [2],[3]       0        
Appalachian Power Co [Member]                
Asset Retirement Obligation, Liabilities Settled [2],[3]       2,700,000        
Public Service Co Of Oklahoma [Member]                
Asset Retirement Obligation, Liabilities Settled [2],[3]       0        
Southwestern Electric Power Co [Member]                
Asset Retirement Obligation, Liabilities Settled [1],[2],[3]       $ 2,100,000        
[1] Includes ARO related to Sabine and DHLC.
[2] Includes ARO related to asbestos removal.
[3] Includes ARO related to ash disposal facilities.
[4] Includes ARO related to nuclear decommissioning costs for the Cook Plant of $1.76 billion and $1.73 billion as of June 30, 2020 and December 31, 2019, respectively.