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Variable Interest Entities And Unconsolidated Investments (Details 1) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2011
Dec. 31, 2010
Equity Method Investments Included on Balance Sheet [Abstract]    
Equity amounts $ 84 $ 80
Greenfield
   
Equity Method Investments Included on Balance Sheet [Abstract]    
Ownership Interest 50.00%  
Equity amounts 79 [1] 77
Whitby
   
Equity Method Investments Included on Balance Sheet [Abstract]    
Ownership Interest 50.00%  
Equity amounts $ 5 [1] $ 3
Russell City
   
Equity Method Investments Included on Balance Sheet [Abstract]    
Ownership Interest 75.00%  
Noncontrolling Interest, Ownership Percentage by Noncontrolling Third Party Owners 25.00%  
[1]

Our risk of loss related to our unconsolidated VIEs is limited to our investment balance. While we also could be responsible for our pro rata portion of debt, holders of the debt of our unconsolidated investments do not have recourse to Calpine Corporation and its other subsidiaries. The debt of our unconsolidated investments is not reflected on our Consolidated Condensed Balance Sheets. At June 30, 2011, and December 31, 2010, equity method investee debt was approximately $514 million and $494 million, respectively, and based on our pro rata share of each of the investments, our share of such debt would be approximately $257 million and $247 million at June 30, 2011 and December 31, 2010, respectively.