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Profit on Disposal, net (Tables)
12 Months Ended
Dec. 31, 2012
Profit on Disposal, net [Abstract]  
Summary of profit on disposal, net
                         

(in millions)

  2012     2011     2010  

Profit on disposal of surplus United Kingdom real estate

  $ 0.1     $ 0.0     $ 0.2  

Loss on disposal of surplus U.S. real estate

    0.0       0.0       (0.1
   

 

 

   

 

 

   

 

 

 
    $ 0.1     $ 0.0     $ 0.1