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Property and Equipment (Tables)
 12 Months Ended
Dec. 30, 2017
Property, Plant and Equipment [Abstract]  
Schedule of Property and Equipment

Property and equipment (which are carried at cost) as of 2017 and 2016 year end are as follows:

 

(Amounts in millions)    2017      2016  

Land

        $       24.5              $       19.1      

Buildings and improvements

      357.4            309.4      

Machinery, equipment and computer software

      889.2            809.6      
  

 

 

     

 

 

  

Property and equipment – gross

      1,271.1            1,138.1      

Accumulated depreciation and amortization

      (786.7)           (712.9)     
  

 

 

     

 

 

  

Property and equipment – net

        $ 484.4              $ 425.2      
  

 

 

     

 

 

  
Summary of Estimated Service Lives of Property and Equipment

The estimated service lives of property and equipment are principally as follows:

 

Buildings and improvements

        3 to 50 years   

Machinery, equipment and computer software

        2 to 15 years   
Summary of Cost and Accumulated Depreciation of Property and Equipment under Capital Leases

The cost and accumulated depreciation of property and equipment under capital leases as of 2017 and 2016 year end are as follows:

 

(Amounts in millions)    2017      2016  

Buildings and improvements

        $       21.4              $       20.5      

Accumulated depreciation

      (14.0)           (12.3)     
  

 

 

     

 

 

  

Net book value

        $ 7.4              $ 8.2