XML 1084 R30.htm IDEA: XBRL DOCUMENT v2.4.0.6
Joint Ownership Agreements (Tables)
12 Months Ended
Dec. 31, 2011
Joint Ownership Agreements [Abstract]  
Ownership and investment (exclusive of nuclear fuel) in jointly owned facilities
                 
Facility (Type)  

Percent

Ownership

   

Amount of

Investment

 

Accumulated  

Depreciation  

 

          (in millions)

Plant Vogtle (nuclear) Units 1 and 2

    45.7%       $3,296     $1,962  

Plant Hatch (nuclear)

    50.1               978         545  

Plant Miller (coal) Units 1 and 2

    91.8             1,389         510  

Plant Scherer (coal) Units 1 and 2

    8.4               157           76  

Plant Wansley (coal)

    53.5               709         225  

Rocky Mountain (pumped storage)

    25.4               175         113  

Intercession City (combustion turbine)

    33.3                 12             4  

Plant Stanton (combined cycle) Unit A

    65.0               154           27