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Severance, impairment and other associated costs (Tables)
6 Months Ended
Jul. 01, 2011
Severance, impairment and other associated costs [Abstract]  
Summary of severance and other costs
The change in our accrual related to severance and other associated costs is summarized as follows (in millions):

Balance accrued at December 31, 2010
 $0.6 
      
Net expense during the six months ended  July 1, 2011
  10.4 
Severance payments
  (4.6)
Other associated costs
  (0.1)
      
Balance accrued at July 1, 2011
 $6.3