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Research and Development (Tables)
6 Months Ended
Jun. 30, 2011
Research and Development [Abstract]  
Project Research and Development Expenses Incurred and Amounts Funded
The following table summarizes the COTS project research and development expenses incurred and amounts funded by NASA (in millions):

   
Second Quarter
  
First Six Months
  
Inception
 
   
2011
  
2010
  
2011
  
2010
  
To Date
 
Research and development costs incurred (1)
 $36.5  $38.9  $78.4  $67.2  $337.5 
Less - amounts funded by NASA
  25.2   18.1   59.3   33.1   211.6 
Net research and development expenses
 $11.3  $20.8  $19.1  $34.1  $125.9 

(1) Includes associated general and administrative expenses.