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Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2011
Commitments and Contingencies  
Schedule of future minimum lease payments under non-cancelable operating leases for each of the next five years

Future minimum lease payments under non-cancelable operating leases at December 31, 2011, for each of the next five years are as follows (in millions):

2012

  $ 18.4  

2013

    14.1  

2014

    10.7  

2015

    8.5  

2016

    6.5  

Thereafter

    16.3  
       

Total

  $ 74.5