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Property and Equipment (Tables)
12 Months Ended
Dec. 28, 2019
Property, Plant and Equipment [Abstract]  
Schedule of Property and Equipment
Property and equipment (which are carried at cost) as of 2019 and 2018 year end are as follows: 
(Amounts in millions)20192018
Land$31.9  $31.7  
Buildings and improvements405.1  368.6  
Machinery, equipment and computer software988.0  944.4  
Property and equipment – gross1,425.0  1,344.7  
Accumulated depreciation and amortization(903.5) (849.6) 
Property and equipment – net$521.5  $495.1  
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