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Employee Benefits (Tables)
9 Months Ended
Sep. 30, 2012
Components of Net Periodic Benefit Cost

The following table sets forth the components of net periodic pension, SERP and post-retirement benefits costs from the NASDAQ OMX Benefit Plans recognized in compensation and benefits expense in the Condensed Consolidated Statements of Income:

 

     Three Months  Ended
September 30,
    Nine Months  Ended
September 30,
 
     2012     2011     2012     2011  
     (in millions)  

Components of net periodic benefit cost

        

Interest cost

   $ 2      $ 1      $ 5      $ 5   

Expected return on plan assets

     (1     (1     (4     (4

Recognized net actuarial loss

     —          1        2        2   
  

 

 

   

 

 

   

 

 

   

 

 

 

Net periodic benefit cost

   $ 1      $ 1      $ 3      $ 3